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学者姓名：孙再成
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摘要 ：
The rational design of inexpensive and highly efficient electrocatalysts for ethanol oxidation reaction (EOR) is crucial for direct ethanol fuel cells. In this study, a series of carbon -supported PtCu electrocatalysts with varying Pt/Cu ratios were synthesized using a microfluidic system. This system enabled the separation of heterogeneous nucleation and nanocrystal growth based on segmental thermal induction. Heterogeneous nucleation occurred at the low -temperature zone, which resulted in uniform loading, while the enhancement of solvent reducibility in the high -temperature region enabled the control of the PtCu nanoparticle composition. The synthesized PtCu/C electrocatalyst, with Cu content adjustable from 17% to 38%, exhibited high crystallinity and homogeneous dispersion, with an average particle size of 3.9 nm. These advantageous physical properties endowed the PtCu/C electrocatalysts with significantly enhanced electrocatalytic performance for EOR compared with commercial Pt/ C catalysts. The development of this method presents a novel approach for the controlled preparation of supported catalysts.
关键词 ：
Electrocatalysts Electrocatalysts Alloy Alloy Microfluidic synthesis Microfluidic synthesis Ethanol oxidation reaction Ethanol oxidation reaction
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| GB/T 7714 | Kang, Xueming , Zhang, Dongtang , An, Li et al. Microfluidic-enabled control of ethanol oxidation catalyst synthesis by separating heterogeneous nucleation and growth processes [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 982 . |
| MLA | Kang, Xueming et al. "Microfluidic-enabled control of ethanol oxidation catalyst synthesis by separating heterogeneous nucleation and growth processes" . | JOURNAL OF ALLOYS AND COMPOUNDS 982 (2024) . |
| APA | Kang, Xueming , Zhang, Dongtang , An, Li , Wang, Xiayan , Sun, Zaicheng , Guo, Guangsheng . Microfluidic-enabled control of ethanol oxidation catalyst synthesis by separating heterogeneous nucleation and growth processes . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 982 . |
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摘要 ：
Carbon dots (CDs) have received considerable attention in many application areas owing to their unique optical properties and potential applications; however, the fluorescent mechanism is an obstacle to their applications. Herein, three-color emissive CDs are prepared from single o-phenylenediamine (oPD) by regulating the ratio of ethanol and dimethylformamide (DMF). Fluorescent mechanism of these CDs is proposed as molecular state fluorescence. Reaction intermediates are identified using liquid chromatrography-mass spectroscopy (LC-MS) and H-1 nuclear magnetic resonance (NMR) spectra. 1H-Benzo[d]imidazole (BI), 2,3-diaminophenazine (DAP), and 5,14-dihydroquinoxalino[2,3-b] phenazine (DHQP) are proposed to be the fluorophores of blue, green, and red emissive CDs by comparing their optical properties. As per the LC-MS and H-1-NMR analysis, DHQP with red emission tends to form from DAP and oPD in pure ethanol. By adding DMF, BI formation is enhanced and DHQP formation is suppressed. The prepared CDs exhibit green emission with DAP. When the DMF amount is >50%, BI formation is considerably promoted, resulting in DAP formation being suppressed. BI with blue emission then turns into the fluorophore of CDs. This result provides us an improved understanding of the fluorescent mechanism of oPD-based CDs, which guides us in designing the structure and optical properties of CDs.
关键词 ：
carbon dots carbon dots fluorophore fluorophore photoluminescence mechanism photoluminescence mechanism molecular state molecular state o-phenylenediamine o-phenylenediamine
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| GB/T 7714 | Li, Pengfei , Xue, Shanshan , Sun, Lu et al. Formation and Fluorescent Mechanism of Multiple Color Emissive Carbon Dots from o-Phenylenediamine [J]. | SMALL , 2024 , 20 (29) . |
| MLA | Li, Pengfei et al. "Formation and Fluorescent Mechanism of Multiple Color Emissive Carbon Dots from o-Phenylenediamine" . | SMALL 20 . 29 (2024) . |
| APA | Li, Pengfei , Xue, Shanshan , Sun, Lu , Ma, Xiaobao , Liu, Wenning , An, Li et al. Formation and Fluorescent Mechanism of Multiple Color Emissive Carbon Dots from o-Phenylenediamine . | SMALL , 2024 , 20 (29) . |
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摘要 ：
一种镍单原子多相催化剂在芳基卤代物和胺类偶联反应中的应用涉及有机化学合成领域。所述应用中所述镍单原子多相催化剂由载体氮化碳‑碳复合材料以及负载在其上以单原子形式分散的镍组成，负载量为0.02～8wt.％.本发明提供的催化剂在可见光照的条件下高转化率、高选择性地实现芳基卤代物和胺类的偶联反应。使用该催化剂实现C‑N偶联反应时，具有反应条件温和、效率高、选择性好的特点，且具有较高的循环稳定性，可以经过简单的液固分离后回收循环再使用。
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| GB/T 7714 | 孙再成 , 王金明 . 一种镍单原子多相催化剂在芳基卤代物和胺类偶联反应中的应用 : CN202310202015.5[P]. | 2023-03-06 . |
| MLA | 孙再成 et al. "一种镍单原子多相催化剂在芳基卤代物和胺类偶联反应中的应用" : CN202310202015.5. | 2023-03-06 . |
| APA | 孙再成 , 王金明 . 一种镍单原子多相催化剂在芳基卤代物和胺类偶联反应中的应用 : CN202310202015.5. | 2023-03-06 . |
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摘要 ：
Ammonia is an important chemical raw material and non-carbon-based fuel. Photocatalytic ammonia production technology as a mild alternative to the traditional Harbor-Bosch route is carried out at the air, liquid, and solid three-phase interface. Promoting the activation of N-2, depressing hydrogen evolution reaction (HER), and increasing the local N-2 concentration around the catalyst surface are critical factors in achieving high conversion efficiency. In this paper, we proposed that defective TiO2 is surface-modified by alkyl acids with different carbon chain lengths (C-2, C-5, C-8, C-11, and C-14) to tune the catalyst surface properties. The defect sites greatly promote N-2 adsorption and activation. The wettability of the catalyst can be regulated from hydrophilic to hydrophobic by the length of the alkyl chain. The hydrophobic surface enhances the N-2 adsorption and increases the local N-2 concentration due to its aerophile. Meanwhile, it depresses the proton adsorption and HER. Overall, the nitrogen reduction reaction (NRR) is greatly promoted. Among the series of samples, they present a systematic change and have a maximal NRR performance for n-octanoic acid-defective TiO2 (C-8-Vo-TiO2; Vo = oxygen vacancy). The rate of ammonia production can be as high as 392 mu mol center dot g(-1)center dot h(-1). This work provides a new strategy for efficient ammonia synthesis at the three-phase interface using photocatalyst technology.
关键词 ：
alkyl acids alkyl acids aerophilic modification aerophilic modification photocatalytic ammonia synthesis photocatalytic ammonia synthesis defective TiO2 defective TiO2
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| GB/T 7714 | Guan, Renquan , Cheng, Xueying , Chen, Yunning et al. Wettability control of defective TiO2 with alkyl acid for highly efficient photocatalytic ammonia synthesis [J]. | NANO RESEARCH , 2023 , 16 (8) : 10770-10778 . |
| MLA | Guan, Renquan et al. "Wettability control of defective TiO2 with alkyl acid for highly efficient photocatalytic ammonia synthesis" . | NANO RESEARCH 16 . 8 (2023) : 10770-10778 . |
| APA | Guan, Renquan , Cheng, Xueying , Chen, Yunning , Wu, Zhengkai , Zhao, Zhao , Shang, Qingkun et al. Wettability control of defective TiO2 with alkyl acid for highly efficient photocatalytic ammonia synthesis . | NANO RESEARCH , 2023 , 16 (8) , 10770-10778 . |
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摘要 ：
Fluorescent carbon dots are a novel type of nanomaterial. Due to their excellent optical properties, they have extensive application prospects in many fields. Studying the formation process and fluorescence mechanism of CDs will assist scientists in understanding the synthesis of CDs and guide more profound applications. Due to their conjugated structures, aromatic compounds have been continuously used to synthesize CDs, with emissions ranging from blue to NIR. There is a lack of a systematic summary of the formation process and fluorescence mechanism of aromatic precursors to form CDs. In this review, the formation process of CDs is first categorized into three main classes according to the precursor types of aromatic compounds: amines, phenols, and polycyclics. And then, the fluorescence mechanism of CDs synthesized from aromatic compounds is summarized. The challenges and prospects are proposed in the last section.
关键词 ：
fluorescence mechanism fluorescence mechanism aromatic compounds aromatic compounds formation process formation process carbon dots carbon dots
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| GB/T 7714 | Xue, Shanshan , Li, Pengfei , Sun, Lu et al. The Formation Process and Mechanism of Carbon Dots Prepared from Aromatic Compounds as Precursors: A Review [J]. | SMALL , 2023 , 19 (31) . |
| MLA | Xue, Shanshan et al. "The Formation Process and Mechanism of Carbon Dots Prepared from Aromatic Compounds as Precursors: A Review" . | SMALL 19 . 31 (2023) . |
| APA | Xue, Shanshan , Li, Pengfei , Sun, Lu , An, Li , Qu, Dan , Wang, Xiayan et al. The Formation Process and Mechanism of Carbon Dots Prepared from Aromatic Compounds as Precursors: A Review . | SMALL , 2023 , 19 (31) . |
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摘要 ：
The solar H-2 generation directly from natural seawater is a sustainable way of green energy. However, it is limited by a low H-2 generation rate even compared to fresh water. In this report, TiO2 is chosen as a model photocatalyst to disclose the critical factor to deteriorate the H-2 generation rate from seawater. The simulated seawater (SSW), which is composed of eight ions (Na+, K+,Ca2+, Mg2+, Cl-, Br-, SO42-, and CO32-), is investigated the effect of each ion on the H-2 production. The results indicate that all ions have a negative effect at the same concentration as in the seawater except Br-. The CO32- has the most serious deterioration, and the H-2 production rate lowers near 40% even at [CO32-] of 1.5 mmol- L-1. The H-2 production rate can be recovered to 85% if the CO32- is excluded from the SSW. To understand the reason, the zeta potential of the TiO2 treated with different ions aqueous solution reveals that the zeta potential decreases when it is treated with CO32- and SO42- due to they can adsorb on the surface of TiO2 nanoparticles. Fourier transform infrared (FTIR) and thermogravimetric analysis-mass spectroscopy (TGA-MS) further confirm that the adsorbed ion is mainly from CO32-. Since the pH of seawater is about 8.9 between pK(a1) (6.37) and pK(a2) (10.3) of H2CO3, the CO32- should exist in the form of HCO3- in the seawater. We proposed a simple method to remove the adsorbed HCO3- from the TiO2 surface by adjusting the pH below the pK al . The results indicate that if a trace amount of HCI (adjusting pH similar to 6.0) is added to the SSW, the H-2 production rate can be recovered to 85% of that in pure water.
关键词 ：
H-2 production rate H-2 production rate seawater seawater pH pH adsorb ions adsorb ions
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| GB/T 7714 | He, Yaqian , Li, Pengfei , Liu, Wenning et al. The critical factors of photocatalytic H-2 production from seawater by using TiO2 as photocatalyst [J]. | NANO RESEARCH , 2022 , 16 (4) : 4620-4624 . |
| MLA | He, Yaqian et al. "The critical factors of photocatalytic H-2 production from seawater by using TiO2 as photocatalyst" . | NANO RESEARCH 16 . 4 (2022) : 4620-4624 . |
| APA | He, Yaqian , Li, Pengfei , Liu, Wenning , An, Li , Qu, Dan , Wang, Xiayan et al. The critical factors of photocatalytic H-2 production from seawater by using TiO2 as photocatalyst . | NANO RESEARCH , 2022 , 16 (4) , 4620-4624 . |
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摘要 ：
The XC-72R supported Pd catalysts exhibit low-temperature catalytic activity for CO oxidation under light irradiation. The CO conversion can reach 100% with the light irradiation of 900 mW center dot cm-2 at a catalyst temperature of 100 degrees C. Pd/C catalysts with different Pd loading have similar performance enhancement under light irradiation. The activation energy of 1% Pd/C catalyst remains unchanged implying that CO oxidation belongs to photothermal catalytic oxidation. The enhanced performance could be ascribed to ultrahigh surface temperature (275 degrees C) induced by the light irradiation of 800 mW center dot cm-2 and detected by an IR camera. That is higher than the catalyst temperature (187 degrees C) measured by the thermocouple. Carbon generates a higher temperature than Pd NP, causing heat transfers from carbon to Pd NP. In contrast, Pd NP produces a higher temperature than Al2O3 for Pd/Al2O3 catalyst, and heat is transferred from Pd to Al2O3. These demonstrate that the enhanced performance contributes to the photothermal effect of carbon.
关键词 ：
Carbon Carbon Photothermal Photothermal Catalytic CO oxidation Catalytic CO oxidation Palladium Palladium Local temperature Local temperature
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| GB/T 7714 | Liu, Ziwen , Niu, Lijuan , Zong, Xupeng et al. Ambient photothermal catalytic CO oxidation over a carbon-supported palladium catalyst [J]. | APPLIED CATALYSIS B-ENVIRONMENTAL , 2022 , 313 . |
| MLA | Liu, Ziwen et al. "Ambient photothermal catalytic CO oxidation over a carbon-supported palladium catalyst" . | APPLIED CATALYSIS B-ENVIRONMENTAL 313 (2022) . |
| APA | Liu, Ziwen , Niu, Lijuan , Zong, Xupeng , An, Li , Qu, Dan , Wang, Xiayan et al. Ambient photothermal catalytic CO oxidation over a carbon-supported palladium catalyst . | APPLIED CATALYSIS B-ENVIRONMENTAL , 2022 , 313 . |
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摘要 ：
It is a challenging task to overcomes the bottleneck of N2 adsorption and activation in N2 reduction reaction (NRR). Regulating the catalyst surface electronic state is treated as a potential strategy to prevail over the barrier. Here, Incorporating Fe as a dopant in the TiO2 nanoparticles can generate oxygen vacancies and dopant energy levels, promoting the adsorption and activation of N2 molecules. F surface modification induces Fe (III) in the high spin state and upshifts the dopant energy level. That facilitates Fe 3d electrons backdonation to N 1ag* orbital promotes the activation of N2 molecule and reduces the limiting potential of NRR. Therefore, F-Fe: TiO2 electrocatalyst achieved the highest Faradaic efficiency and maximum NH3 production rate of 27.67% and 27.86 mu g h-1 mgcat. -1 at -0.5 V v.s. reversible hydrogen electrode. This work provides deep insights into the design surface electronic state of catalyst toward efficient N2 to NH3 conversion.
关键词 ：
N-2 Fixation N-2 Fixation Iron doping Iron doping Electrocatalysis Electrocatalysis Surface fluorine treatment Surface fluorine treatment Surface electronic state manipulation Surface electronic state manipulation
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| GB/T 7714 | Song, Guangxin , Gao, Rui , Zhao, Zhao et al. High-spin state Fe(III) doped TiO2 for electrocatalytic nitrogen fixation induced by surface F modification [J]. | APPLIED CATALYSIS B-ENVIRONMENTAL , 2022 , 301 . |
| MLA | Song, Guangxin et al. "High-spin state Fe(III) doped TiO2 for electrocatalytic nitrogen fixation induced by surface F modification" . | APPLIED CATALYSIS B-ENVIRONMENTAL 301 (2022) . |
| APA | Song, Guangxin , Gao, Rui , Zhao, Zhao , Zhang, Yujun , Tan, Huaqiao , Li, Haibo et al. High-spin state Fe(III) doped TiO2 for electrocatalytic nitrogen fixation induced by surface F modification . | APPLIED CATALYSIS B-ENVIRONMENTAL , 2022 , 301 . |
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摘要 ：
本发明提了一种PD/A原位耦合藻类实现深度脱氮除磷的方法和装置，所述方法包括将污水送入短程反硝化‑厌氧氨氧化反应区进行处理的步骤；在短程反硝化‑厌氧氨氧化反应区富集有藻类并投加有光催化材料；向污水中投加乙酸作为碳源；处理过程中使用可见光对反应区进行光照，通过调节光照参数控制藻类数量，使反应区的溶解氧浓度保持为0.9‑1.5mg/L，原位生成氨氧化菌。本发明通过向PD/A反应区中投加光催化材料，促进藻类于生物反应器内原位富集，同时调节光照条件的手段，创造并维持微氧环境，促进AOB菌群原位生长，形成菌藻共生的PD/A‑PN/A体系，强化体系脱氮除磷，实现氮磷的同步高效去除。
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| GB/T 7714 | 张莉 , 董亭君 , 孙再成 et al. PD/A原位耦合藻类实现深度脱氮除磷的方法及装置 : CN202210385684.6[P]. | 2022-04-13 . |
| MLA | 张莉 et al. "PD/A原位耦合藻类实现深度脱氮除磷的方法及装置" : CN202210385684.6. | 2022-04-13 . |
| APA | 张莉 , 董亭君 , 孙再成 , 杨嘉春 , 豆全浩 . PD/A原位耦合藻类实现深度脱氮除磷的方法及装置 : CN202210385684.6. | 2022-04-13 . |
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摘要 ：
本发明提供一种共轭聚合物负载高浓度单原子金属位点的多相催化剂及其制备方法，包括以共轭聚合物和金属‑配合物前驱体为原料经光照辐射诱导配体交换的步骤；共轭聚合物为氮化碳、氮化碳衍生物、共价有机骨架、线性有机共轭高分子或以上一种或多种形成的复合材料；金属‑配合物前驱体通式为MLnXm，过渡金属M＝铂、铑、钯、金、银、钌、铱、铜、铁、钴、镍中的一种或多种；有机配体L＝三苯基膦、三叔丁基膦、联吡啶、二亚苄基丙酮、乙酰丙酮、六氟乙酰丙酮、三氟乙酰丙酮、二苯甲酰丙酮、苯甲酰丙酮、辛1, 5‑二烯、甲基、羰基中的一种或多种，n＝1‑4；卤素X＝Cl, Br, m＝0‑3。
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| GB/T 7714 | 宗绪鹏 , 孙再成 . 一种共轭聚合物负载高浓度单原子金属位点的多相催化剂及其制备方法 : CN202210272775.9[P]. | 2022-03-18 . |
| MLA | 宗绪鹏 et al. "一种共轭聚合物负载高浓度单原子金属位点的多相催化剂及其制备方法" : CN202210272775.9. | 2022-03-18 . |
| APA | 宗绪鹏 , 孙再成 . 一种共轭聚合物负载高浓度单原子金属位点的多相催化剂及其制备方法 : CN202210272775.9. | 2022-03-18 . |
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