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学者姓名：李洪义
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摘要 ：
Designing low-cost catalysts that offer both high mass activity and high cycling stability is crucial. Herein, a binder -free 3D self-supporting electrode composed of carbo-nitride tungsten supporting Pt nanoparticles (Pt@3DP-WN x C 1- x /W) has been successfully synthesized for hydrogen evolution reaction in acid electrolyte. The tungsten carbo-nitride synthesized via a one-step heat treatment exhibits enhanced conductivity as a result of the carbonization process and optimizes the adsorption and desorption properties of WC towards H atoms through the incorporation of N atoms, thereby achieving an effective balance. Simultaneously, the N -Pt bond enhances electron transfer efficiency. This electrode exhibits outstanding electrochemical performance with a 219 mV overpotential at a current density of -300 mA cm - 2 . Its current density and mass activity is up to 75 mA cm -2 and 7.5 A & sdot;mg Pt- 1 at an overpotential of 100 mV, respectively, which are both 2.6 times higher than those of the 40% Pt/C electrode. In addition, it reveals a low Tafel slope of 38.3 mV dec - 1 indicating rapid kinetics. Furthermore, the electrocatalyst shows only 3 mV day at -100 mA cm -2 after 10,000 cycles. Both theoretical calculation and experimental results show the promotion of catalytic efficiency of Pt@3DP-WN x C 1-x /W brought by carbo-nitrition. This study offers a novel, efficient, and stable electrode design strategy.
关键词 ：
Hydrogen evolution reaction Hydrogen evolution reaction Tungsten Tungsten Self-supporting Self-supporting Electrodeposition Electrodeposition Carbonitriding Carbonitriding
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| GB/T 7714 | Song, Xiangxian , Yang, Zicong , Wu, Yahang et al. Porous tungsten carbo-nitride supported Pt nanoparticles with high conductivity for efficient and stable hydrogen evolution reaction [J]. | JOURNAL OF POWER SOURCES , 2024 , 604 . |
| MLA | Song, Xiangxian et al. "Porous tungsten carbo-nitride supported Pt nanoparticles with high conductivity for efficient and stable hydrogen evolution reaction" . | JOURNAL OF POWER SOURCES 604 (2024) . |
| APA | Song, Xiangxian , Yang, Zicong , Wu, Yahang , Chang, Yukun , Song, Hui , Zhou, Wenyuan et al. Porous tungsten carbo-nitride supported Pt nanoparticles with high conductivity for efficient and stable hydrogen evolution reaction . | JOURNAL OF POWER SOURCES , 2024 , 604 . |
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摘要 ：
In order to enhance the conductivity and catalytic efficiency of non-noble electrocatalyst, an electrocatalysts consisting of ZnCo metallic double oxide with S doping embedded on V2C MXene for oxygen evolution reaction (OER) is synthesized. Cobalt serves as the primary active site, while zinc contributes to improve conductivity owing to its high electronegativity. Sulfur doping plays a crucial role in reducing the energy barrier of rate determining step of OER. The V2C MXene as a substrate can promote conductivity as well, resulting in synergistic effect. The electrocatalyst exhibits a low overpotential of 240 mV at 10 mA cm(-2) in alkaline electrolyte, surpassing that of IrO2 commercial electrocatalyst. The potential shows only a minimal similar to 5 mV day after 72-h stability test at 20 mA cm(-2). The current density at 1.6 V vs RHE is 2 times that of commercial IrO2. Both theoretical calculation and experimental result demonstrate the advantage brought by the incorporation of zinc and sulfur. This work introduces a new idea of synergetic effect in non-noble metallic electrocatalysis.
关键词 ：
V- 2 C MXene V- 2 C MXene Sulfur doping Sulfur doping Non -noble metal Non -noble metal Oxygen evolution reaction Oxygen evolution reaction Synergetic effect Synergetic effect
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| GB/T 7714 | Yang, Zicong , Chen, Yanhui , Chang, Yukun et al. Synergetic effect of both cation and anion doping cobalt oxides on V2C MXene boosting oxygen evolution reaction [J]. | JOURNAL OF POWER SOURCES , 2024 , 604 . |
| MLA | Yang, Zicong et al. "Synergetic effect of both cation and anion doping cobalt oxides on V2C MXene boosting oxygen evolution reaction" . | JOURNAL OF POWER SOURCES 604 (2024) . |
| APA | Yang, Zicong , Chen, Yanhui , Chang, Yukun , Song, Xiangxian , Wang, Jinshu , Li, Hongyi . Synergetic effect of both cation and anion doping cobalt oxides on V2C MXene boosting oxygen evolution reaction . | JOURNAL OF POWER SOURCES , 2024 , 604 . |
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摘要 ：
The electrolysis of water requires excess energy in the form of overpotential to overcome activation barriers due to the sluggish kinetics of both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As an inexpensive bifunctional catalyst with noble-metal-like electrocatalytic properties, two-dimensional layered double hydroxides (LDHs) have received considerable attention. Here, a simple electrodeposition method is proposed to synthesize a La-doped NiFe LDH (NiFeLa LDH) on a nickel foam. NiFeLa LDH exhibits excellent water splitting performance due to the synergistic effect of La and laminate metal, with the best overpotential of 399 mV for OER and 223 mV for HER at a current density of 50 mA cm(-2), along with excellent durability in alkaline solution tests for 24 h. The electrochemical performance analysis and other characterization results confirm that La doping can change the electronic structure of LDH laminates. According to density functional theory calculations, the remarkably enhanced catalytic performance of NiFeLa LDH is ascribed to the decrease in the activation energy of adsorbed oxygen due to the adsorption of hydroxide, making the transformation from *OH to *O the rate-determining step of the OER process with a four-electron mechanism. Additionally, the electrolyzer with NiFeLa LDH as both anode and cathode provides good stability as well as a reduced cell voltage of 1.921 V to provide a current density of 50 mA cm(-2). Overall, this study offers a simple, convenient, rapid, and environmentally friendly method for fabricating high-performance water splitting catalysts.
关键词 ：
electrodeposition electrodeposition transition-metalhydroxides transition-metalhydroxides overall watersplitting overall watersplitting La-doped LDH La-doped LDH bifunctional electrocatalyst bifunctional electrocatalyst
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| GB/T 7714 | Xu, Rou , Wang, Xinxin , Yang, Zicong et al. Electrodeposition Fabrication of La-Doped NiFe Layered Double Hydroxide to Improve Conductivity for Efficient Overall Water Splitting [J]. | ACS APPLIED ENERGY MATERIALS , 2024 , 7 (9) : 3866-3875 . |
| MLA | Xu, Rou et al. "Electrodeposition Fabrication of La-Doped NiFe Layered Double Hydroxide to Improve Conductivity for Efficient Overall Water Splitting" . | ACS APPLIED ENERGY MATERIALS 7 . 9 (2024) : 3866-3875 . |
| APA | Xu, Rou , Wang, Xinxin , Yang, Zicong , Chang, Yukun , Chen, Xiaowen , Wang, Jinshu et al. Electrodeposition Fabrication of La-Doped NiFe Layered Double Hydroxide to Improve Conductivity for Efficient Overall Water Splitting . | ACS APPLIED ENERGY MATERIALS , 2024 , 7 (9) , 3866-3875 . |
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摘要 ：
Highly active, stable, economic friendly electrocatalysts play a crucial role for the commercialization of direct methanol fuel cells (DMFCs). One kind of flower-like PtNi bimetallic particle anchored on TiO2 na-notube arrays (PtNi/TNTs/Ti) had been synthesized by one-step electrochemical synthesis as anode catalysts for methanol oxidation reaction (MOR) in this study. The PtNi/TNTs/Ti electrode demonstrated high elec-trocatalytic activity and durability significantly for MOR. In addition, PtNi100/TNTs/Ti possessed a mass activity of 409.8 mA/mgpt, which was four times greater than that of Pt100/TNTs/Ti electrodes. According to further structure analysis, the improvement in catalytic activity was attributed to lattice compression when Ni atoms entered the Pt lattice accompanied by a 1.02 eV positive shift in Pt 4 f7/2 binding energy, and density functional theory (DFT) calculations indicated that the remarkably enhanced catalytic performance on PtNi through lattice compression arising from the enhanced OH adsorption. It appears promising that this simple method could be adopted to prepare an integrated electrode used as energy and environmental applications. (c) 2023 Published by Elsevier B.V.
关键词 ：
TiO2 nanotubes TiO2 nanotubes PtNi bimetallic catalyst PtNi bimetallic catalyst Methanol oxidation reaction Methanol oxidation reaction Lattice compression Lattice compression
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| GB/T 7714 | Chang, Yukun , Chen, Yanhui , Wu, Yahang et al. One-step synthesis of PtNi anchored on TiO2 nanotube arrays for methanol oxidation [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 943 . |
| MLA | Chang, Yukun et al. "One-step synthesis of PtNi anchored on TiO2 nanotube arrays for methanol oxidation" . | JOURNAL OF ALLOYS AND COMPOUNDS 943 (2023) . |
| APA | Chang, Yukun , Chen, Yanhui , Wu, Yahang , Yang, Zicong , Wang, Jinshu , Wang, Xinxin et al. One-step synthesis of PtNi anchored on TiO2 nanotube arrays for methanol oxidation . | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 943 . |
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摘要 ：
To reduce platinum usage, ultrathin MXene sheets with little restacking effect were prepared. The ultrathin MXene was prepared by a two-step etching process, which showed high specific surface area with low charge transfer resistance. The sample showed a double layer capacity of 64.98 mF cm(-2), which is 14 times as large as that of ordinary HF prepared MXene, indicating a larger electrochemically active surface area. It showed a much better HER performance of similar to 190 mV at 10 mA cm(-2). The better performance attributes to 0.4 wt% Pt loaded. The Pt loaded MXene exhibited a better HER performance of similar to 75 mV at 10 mA cm(-2) and a Tafel slope of 61.7 mV center dot dec(-1) close to 40 wt% commercial Pt/C. The sample performed better than Pt/C in a 3 h chronopotentiometry test and hardly changed in ECSA after the cyclic experiment. With more Pt loading, the sample delivered better HER performance than Pt/C in the LSV test (similar to 51 mV at 10 mA cm(-2)). This work provides an effective route for the preparation of ultrathin MXene sheets with larger electrochemically active area and more active sites for Pt loading, leading to superior HER performance.
关键词 ：
Hydrogen evolution reaction Hydrogen evolution reaction Electrochemically active area Electrochemically active area Little restacking Little restacking Ultrathin MXene Ultrathin MXene
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| GB/T 7714 | Yang, Zicong , Chen, Yanhui , Chen, Ge et al. Ultrathin Ti3C2Tx MXene sheets with high electrochemically active area anchored Pt boosting hydrogen evolution [J]. | HELIYON , 2023 , 9 (9) . |
| MLA | Yang, Zicong et al. "Ultrathin Ti3C2Tx MXene sheets with high electrochemically active area anchored Pt boosting hydrogen evolution" . | HELIYON 9 . 9 (2023) . |
| APA | Yang, Zicong , Chen, Yanhui , Chen, Ge , Wang, Jinshu , Li, Hongyi . Ultrathin Ti3C2Tx MXene sheets with high electrochemically active area anchored Pt boosting hydrogen evolution . | HELIYON , 2023 , 9 (9) . |
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摘要 ：
Exploring highly efficient, CO-tolerant and stability catalyst, such as Pt-based bimetallic catalyst for methanol oxidation reaction (MOR) is pressingly demanded towards commercialization of direct methanol fuel cells (DMFCs). Herein, the PtCo nanoparticles are encapsulated in bamboo-like highly ordered TiO2 nanotubes (PtCo/ TNTs/Ti) by a facile electrochemical method. The obtained PtCo/TNTs/Ti electrode exhibits a large electro-chemical active area of 1220.4 cm2/mgpt. Its mass activity reaches to 1148 mA/mgPt, which is 3.6 times and 7.5 times than that of Pt/TNTs/Ti and PtC, respectively. The lattice spacing of (111) and (200) faces are respectively reduced by 3.5% and 7.1%, caused by Co incorporated into Pt lattice. The lattice strain is an important reason for improving catalytic performance. In addition, an insight into growth mechanism is proposed according to the first-principle calculations. Co atoms that alloyed with Pt on the surface provide active sites for the following reduction of Pt, promoting the deposition efficiency. The obtained PtCo/TNTs/Ti is expected as the candidate electrode to output high power density in DMFCs.
关键词 ：
TiO2 nanotubes arrays TiO2 nanotubes arrays Lattice compression Lattice compression PtCo catalyst PtCo catalyst Growth mechanism Growth mechanism Integrated electrode Integrated electrode
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| GB/T 7714 | Chang, Yukun , Chen, Yanhui , Yang, Zicong et al. Lattice distortion of PtCo nanoparticles encapsulated in TiO2 nanotubes boosts methanol oxidation [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 968 . |
| MLA | Chang, Yukun et al. "Lattice distortion of PtCo nanoparticles encapsulated in TiO2 nanotubes boosts methanol oxidation" . | JOURNAL OF ALLOYS AND COMPOUNDS 968 (2023) . |
| APA | Chang, Yukun , Chen, Yanhui , Yang, Zicong , Wang, Jinshu , Li, Hongyi . Lattice distortion of PtCo nanoparticles encapsulated in TiO2 nanotubes boosts methanol oxidation . | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 968 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Designing highly efficient and durable electrode for methanol oxidation reaction (MOR) is crucial to commercializing direct methanol fuel cells (DMFCs). However, traditional Pt/C catalysts usually suffer from CO poisoning, and agglomeration of powder catalyst, which leads to rapid activity degradation. Herein, we have successfully fabricated self-supported Pt3Cu@3DP-WO3/W electrode via a facile and effective synthesis approach by combining anodic oxidation and electrodeposition method. Benefitting from the three dimensional nanoporous of WO3 with more surface area and strong adhesion, and Pt3Cu alloy synergism induced the lattice compressive strain, the Pt3Cu@3DP-WO3/W electrode achieved 2.77-fold and 4.8-fold enhancement in specific activity (2.15 mA cm-2) and mass activity (853 mA$mgPt-1) for MOR relative to Pt/C catalysts, respectively. Moreover, both the experiments and theoretical calculations revealed that the doping of Cu element weakened the chemisorption of CO-like intermediates by lowering the Pt d-band center through compressive lattice strain, which resulting in excellent catalytic stability. This binder-free self-supported electrode is a viable alternative for commercial application of DMFCs.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
关键词 ：
Lattice compression strain Lattice compression strain Platinum-copper alloy Platinum-copper alloy Cyclic voltammetry co-deposition Cyclic voltammetry co-deposition Methanol oxidation reaction Methanol oxidation reaction Self-supported electrode Self-supported electrode
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| GB/T 7714 | Chen, Yanhui , Wu, Yahang , Chang, Yukun et al. Pt3Cu alloy anchored on nanoporous WO3 with high activity and stability in methanol oxidation [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 50 : 1441-1449 . |
| MLA | Chen, Yanhui et al. "Pt3Cu alloy anchored on nanoporous WO3 with high activity and stability in methanol oxidation" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 50 (2023) : 1441-1449 . |
| APA | Chen, Yanhui , Wu, Yahang , Chang, Yukun , Yang, Zicong , Song, Xiangxian , Zhou, Wenyuan et al. Pt3Cu alloy anchored on nanoporous WO3 with high activity and stability in methanol oxidation . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 50 , 1441-1449 . |
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摘要 ：
An innovative method is created for transforming iron-rich RO phase (MgO0.239FeO0.761) on steel slag surface into nanostructured Mg0.04Fe2.96O4 layer. The phase change process is investigated, and it is found that salicylic acid modification and alkaline roasting procedures remarkably increase the specific surface area from 0.46 m2/g (raw steel slag) to 69.5 m2/g (Mg0.04Fe2.96O4), and the generation of Mg0.04Fe2.96O4 enhances the absorption of visible light and Cr(VI) conversion with 2-times increasement than raw steel slag. Surface complexation between H2C2O4 ligands and Fe metal moiety on Mg0.04Fe2.96O4 induces the intramolecular electron transfer under visible light irradiation based on a ligand-to-metal charge transfer mechanism, thus resulting in Cr(VI) photoreduction, and the catalytic efficiency is above 90% for Cr(VI) (40 mg/L) under inherent pH= 5.5 conditions. Moreover, recyclability tests based on magnetic separation show that the photoreactivity is closely related to Mg content of Mg0.04Fe2.96O4 layer where Mg leaching occurs and finally generates cubic spinel configuration Fe3O4. This work highlights the importance of surface functionalization in post-use phases of steel slag in which surface reactivity and application potential can be greatly altered by chemical exposure history and surface transformations. It also provides valuable references for studying the metastable state mechanism of magnesium ferrite photocatalysts.
关键词 ：
Cr(VI) reduction Cr(VI) reduction Steel Slag Steel Slag Magnesium ferrite Magnesium ferrite
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| GB/T 7714 | Sun, Lingmin , Wu, Junshu , Wang, Jinshu et al. In-situ constructing nanostructured magnesium ferrite on steel slag for Cr (VI) photoreduction [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2022 , 422 . |
| MLA | Sun, Lingmin et al. "In-situ constructing nanostructured magnesium ferrite on steel slag for Cr (VI) photoreduction" . | JOURNAL OF HAZARDOUS MATERIALS 422 (2022) . |
| APA | Sun, Lingmin , Wu, Junshu , Wang, Jinshu , Yang, Yilong , Xu, Meng , Liu, Jingchao et al. In-situ constructing nanostructured magnesium ferrite on steel slag for Cr (VI) photoreduction . | JOURNAL OF HAZARDOUS MATERIALS , 2022 , 422 . |
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摘要 ：
Aluminum alloys are widely used in the aerospace and automotive industries due to their high strength and low density but also suffer from poor wear resistance. The employment of stable solid lubricants on aluminum alloys will be beneficial for their service life under load-bearing conditions. In this paper, MoSx-W composite coatings were deposited on porous anodic aluminum oxide (AAO)/Al substrates. The effects of tungsten content on the film structure and friction properties were systematically investigated. It is found that tungsten exists as metallic particles within the MoSx matrix, forming a system of hardness phase reinforced soft matrix. With the increase of W content, the film morphology transforms from nano-flower-like to ball-like, associated with an obvious enhancement of film density as well as hardness. The latter prolongs the service life of MoSx films from 10 min only in untreated specimen to 88.8 min in composite sample. Finally, the improvement of wear performance upon tungsten loading was discussed in detail.
关键词 ：
Aluminum alloys Aluminum alloys Solid lubricant Solid lubricant High service life High service life Tungsten Tungsten MoS x film MoS x film
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| GB/T 7714 | Wang, Yue , He, Jiawei , Song, Xiangxian et al. Microstructure and tribological properties of sputtered MoSx-W composite films supported by porous alumina aperture array [J]. | SURFACE & COATINGS TECHNOLOGY , 2022 , 450 . |
| MLA | Wang, Yue et al. "Microstructure and tribological properties of sputtered MoSx-W composite films supported by porous alumina aperture array" . | SURFACE & COATINGS TECHNOLOGY 450 (2022) . |
| APA | Wang, Yue , He, Jiawei , Song, Xiangxian , Zhou, Wenyuan , Chen, Shuqun , Chen, Yanhui et al. Microstructure and tribological properties of sputtered MoSx-W composite films supported by porous alumina aperture array . | SURFACE & COATINGS TECHNOLOGY , 2022 , 450 . |
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摘要 ：
Here, Pt modified anatase-type titanium dioxide (TiO2) nanotube arrays were prepared by electroplating method for a low-platinum Pt/TiO2 nanotubes electrode (Pt/TiO2-NTs). By contrast, we fixed Pt on TiO2 dense film by the same procedure as a control sample (Pt/TiO2-F). The scanning electron microscopy and transmission electron microscopy observation showed that Pt nanoparticles were distributed uniformly in nanotube arrays, and Pt/TiO2 NTs showed a higher efficiency in electrocatalytic hydrogen evolution compared with Pt/TiO2-F and commercial Pt/C catalyst, in which the overpotential of Pt/TiO2-NTs was 0.079 V, the Tafel slope was 42.7 mV.dec(-1) at 10 mA.cm(-2). The catalytic activity of 3 000 cycles duration stability test results showed that Pt/TiO2-NTs exhibited excellent stability compared with the above contrast electrodes.
关键词 ：
TiO2 nanotubes carrier TiO2 nanotubes carrier electroplating electroplating electrocatalytic hydrogen evolution electrocatalytic hydrogen evolution platinum-based catalyst platinum-based catalyst
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| GB/T 7714 | Wu An-Ran , Chen Yan-Hui , Wang Xin-Xin et al. Pt/TiO2 Nanotubes Electrode: Preparation by Electroplating Method and Electrocatalytic Hydrogen Evolution Performance [J]. | CHINESE JOURNAL OF INORGANIC CHEMISTRY , 2022 , 38 (2) : 227-236 . |
| MLA | Wu An-Ran et al. "Pt/TiO2 Nanotubes Electrode: Preparation by Electroplating Method and Electrocatalytic Hydrogen Evolution Performance" . | CHINESE JOURNAL OF INORGANIC CHEMISTRY 38 . 2 (2022) : 227-236 . |
| APA | Wu An-Ran , Chen Yan-Hui , Wang Xin-Xin , Zhou Wen-Yuan , He Jia-Wei , Wang Jin-Shu et al. Pt/TiO2 Nanotubes Electrode: Preparation by Electroplating Method and Electrocatalytic Hydrogen Evolution Performance . | CHINESE JOURNAL OF INORGANIC CHEMISTRY , 2022 , 38 (2) , 227-236 . |
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