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学者姓名:戴洪兴
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摘要 :
Three-dimensionally ordered macroporous (3DOM) Ce0.7Zr0.3O2-supported 0.7 Zr 0.3 O 2-supported Pd (xPd/3DOM x Pd/3DOM Ce 0.7 Zr 0.3 O 2 , x = 0.97, 1.49, and 2.10 wt%) catalysts were fabricated using the polymethyl methacrylate (PMMA) microspheretemplating and polyvinyl alcohol (PVA)-protected reduction methods. It was found that the x Pd/3DOM Ce 0.7 Zr 0.3 O 2 samples with surface areas of 31.9-38.2 m2/g 2 /g possessed a high-quality 3DOM architecture, with the Pd nanoparticles (NPs) being uniformly dispersed on the 3DOM Ce 0.7 Zr 0.3 O 2 surface. Among all of the samples, 1.49 Pd/3DOM Ce 0.7 Zr 0.3 O 2 showed the best CH4 4 combustion activity: The T 10% , T 50% , and T 90% (the temperatures at CH4 4 conversions = 10, 50, and 90%) were 269, 330, and 380 degrees C, respectively; specific reaction rate at 260 degrees C was 115.0 x 10-- 6 mol/(gPd Pd s), and turnover frequency at 260 degrees C (TOFPd) Pd ) was 28.8 x 10-- 3 s-1.-1 . The good catalytic performance of 1.49 Pd/3DOM Ce 0.7 Zr 0.3 O 2 was associated with the well-defined 3DOM structure, high Pd NP dispersion, rich adsorbed oxygen species, and strong interaction between Pd NPs and 3DOM Ce 0.7 Zr 0.3 O 2 . Interestingly, the 1.49 Pd/3DOM Ce 0.7 Zr 0.3 O 2 sample also exhibited superior water-tolerant performance. The product analysis results after the in situ introduction of isotopic water demonstrated that the excellent water resistance of 1.49 Pd/3DOM Ce 0.7 Zr 0.3 O 2 was due to the interaction of oxygen and water to form the peroxy hydroxyl species on the sample surface after the water pretreatment, which was beneficial for the combustion of methane.
关键词 :
Supported palladium catalyst Supported palladium catalyst Water resistance Water resistance Ceria-zirconia solid solution Ceria-zirconia solid solution Methane combustion Methane combustion Three-dimensionally ordered macropore Three-dimensionally ordered macropore
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GB/T 7714 | Lin, Hongxia , Liu, Yuxi , Deng, Jiguang et al. Enhanced water resistance of Pd/3DOM Ce 0.7 Zr 0.3 O 2 catalysts in methane combustion [J]. | CATALYSIS TODAY , 2024 , 434 . |
MLA | Lin, Hongxia et al. "Enhanced water resistance of Pd/3DOM Ce 0.7 Zr 0.3 O 2 catalysts in methane combustion" . | CATALYSIS TODAY 434 (2024) . |
APA | Lin, Hongxia , Liu, Yuxi , Deng, Jiguang , Jing, Lin , Wang, Zhiwei , Wei, Lu et al. Enhanced water resistance of Pd/3DOM Ce 0.7 Zr 0.3 O 2 catalysts in methane combustion . | CATALYSIS TODAY , 2024 , 434 . |
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摘要 :
Reducing emissions of volatile organic compounds (VOCs) is an integral part of improving the quality of the atmospheric environment. Catalytic oxidation has become an effective means of treating low and medium concentration VOCs exhausts due to its advantages in terms of removal efficiency, energy saving and environmental protection. Due to the unique inherent properties of supported precious metal catalysts, they show good catalytic efficiency in VOCs emission reduction. In this study, the mesoporous Si-WO 3 support was first synthesized by the P123-assisted sol -gel method, and the x Pt/Si-WO 3 catalysts with the actual loadings ( x = 0.19, 0.48, and 0.81 wt%) of Pt nanoparticles (NPs) were then obtained, physicochemical properties of these materials were characterized using a variety of techniques, and their catalytic activities and water resistance for the oxidation of toluene were evaluated. The results showed that Pt NPs with an average particle size of 2.3-3.3 nm were highly dispersed on the mesoporous Si-WO 3 support, and the 0.81Pt/Si-WO 3 sample exhibited the highest catalytic activity for toluene oxidation at a space velocity of 20,000 mL/(g h) ( T 50% = 167 degrees C and T 90% = 180 degrees C; specific reaction rate at 160 degrees C = 8.54 mu mol/(g Pt s), turnover frequency (TOF Pt ) at 160 degrees C = 1.67 x 10 - 3 s - 1 , and apparent activation energy = 45 kJ/mol). The good catalytic performance of 0.81Pt/Si-WO 3 was associated with its large surface area, well dispersed Pt NPs, high adsorbed oxygen species concentration, large toluene adsorption capacity, and strong interaction between Pt NPs and mesoporous Si-WO 3 . The 0.81Pt/Si-WO 3 sample possessed excellent water resistance, and the introduction of 5 vol% or 10 vol% water vapor to the reaction system enhanced toluene oxidation since part of water vapor participated in the oxidation of toluene. In addition, the toluene oxidation pathway might obey the sequence of (adsorbed toluene + adsorbed oxygen species) -* benzyl alcohol -* (benzoic acid and benzaldehyde) -* maleic anhydride -* (carbon dioxide and water).
关键词 :
Mesoporous structure Mesoporous structure Water resistance Water resistance Si-doped tungsten oxide Si-doped tungsten oxide Toluene oxidation Toluene oxidation Supported platinum catalyst Supported platinum catalyst Volatile organic compound Volatile organic compound
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GB/T 7714 | Wang, Xiaoyu , Deng, Jiguang , Liu, Yuxi et al. Mesoporous Si-WO 3-supported Pt catalysts with high catalytic performance and excellent water resistance for toluene oxidation [J]. | CATALYSIS TODAY , 2024 , 432 . |
MLA | Wang, Xiaoyu et al. "Mesoporous Si-WO 3-supported Pt catalysts with high catalytic performance and excellent water resistance for toluene oxidation" . | CATALYSIS TODAY 432 (2024) . |
APA | Wang, Xiaoyu , Deng, Jiguang , Liu, Yuxi , Jing, Lin , Wu, Linke , Feng, Ying et al. Mesoporous Si-WO 3-supported Pt catalysts with high catalytic performance and excellent water resistance for toluene oxidation . | CATALYSIS TODAY , 2024 , 432 . |
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摘要 :
Crystal facet and defect engineering are crucial for designing heterogeneous catalysts. In this study, different solvents were utilized to generate NiO with distinct shapes (hexagonal layers, rods, and spheres) using nickelbased metal-organic frameworks (MOFs) as precursors. It was shown that the exposed crystal facets of NiO with different morphologies differed from each other. Various characterization techniques and density functional theory (DFT) calculations revealed that hexagonal-layered NiO (NiO-L) possessed excellent low-temperature reducibility and oxygen migration ability. The (111) crystal plane of NiO-L contained more lattice defects and oxygen vacancies, resulting in enhanced propane oxidation due to its highest O 2 adsorption energy. Furthermore, the higher the surface active oxygen species and surface oxygen vacancy concentrations, the lower the C -H activation energy of the NiO catalyst and hence the better the catalytic activity for the oxidation of propane. Consequently, NiO-L exhibited remarkable catalytic activity and good stability for propane oxidation. This study provided a simple strategy for controlling NiO crystal facets, and demonstrated that the oxygen defects could be more easily formed on NiO(111) facets, thus would be beneficial for the activation of C -H bonds in propane. In addition, the results of this work can be extended to the other fields, such as propane oxidation to propene, fuel cells, and photocatalysis.
关键词 :
Solvent regulation effect Solvent regulation effect Oxygen vacancy Oxygen vacancy Nickel oxide Nickel oxide Density functional theory Density functional theory Propane oxidation Propane oxidation Crystal facet engineering Crystal facet engineering
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GB/T 7714 | Chai, Qianqian , Li, Chuanqiang , Song, Liyun et al. The influence of crystal facet on the catalytic performance of MOFs-derived NiO with different morphologies for the total oxidation of propane: The defect engineering dominated by solvent regulation effect [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 475 . |
MLA | Chai, Qianqian et al. "The influence of crystal facet on the catalytic performance of MOFs-derived NiO with different morphologies for the total oxidation of propane: The defect engineering dominated by solvent regulation effect" . | JOURNAL OF HAZARDOUS MATERIALS 475 (2024) . |
APA | Chai, Qianqian , Li, Chuanqiang , Song, Liyun , Liu, Cui , Peng, Tao , Lin, Chuanchuan et al. The influence of crystal facet on the catalytic performance of MOFs-derived NiO with different morphologies for the total oxidation of propane: The defect engineering dominated by solvent regulation effect . | JOURNAL OF HAZARDOUS MATERIALS , 2024 , 475 . |
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摘要 :
Among the developed electrocatalysts, NiCr-layered double hydroxides (NiCr-LDH) are one of the most effective electrocatalytic materials for water oxidation. However, applications of such a kind of materials are practically limited due to their poor electric conductivity. In this work, the single-walled carbon nanotube (SWCNT) was doped to NiCr-LDH, and the LDH-based nanocomposites were synthesized using the one-step ultrasonic-assisted method. Physicochemical properties of the NiCr-LDH/SWCNT composites were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), field emission-scanning electron microscopy (FE-SEM), and linear sweep voltammetry (LSV). The NiCr-LDH/SWCNT composites were used as effective nanomaterials for oxygen evolution reaction (OER) at a near neutral medium. The LSV results confirm that the overpotential of the NiCr-LDH/SWCNT-0.006 sample decreased to about 120 mV at pH = 9.5, as compared with that of the NiCr-LDH or NiCr-LDH-SWCNT-0.006 (prepared by the two-step method) sample. The high oxygen evolution activity of NiCr-LDH/SWCNT-0.006 was associated with the co-presence of the homogeneously dispersed NiCr-LDH, good electrochemical activity, and high electrical conductivity. In addition, the as-prepared optimized NiCr-LDH/SWCNT electrocatalyst was highly stable for the OER reaction. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
关键词 :
Ni-based-layered double hydroxide Ni-based-layered double hydroxide Ultrasonic method Ultrasonic method Doped carbon nanotube Doped carbon nanotube Water oxidation Water oxidation Electrocatalyst Electrocatalyst
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GB/T 7714 | Foruzin, Leila Jafari , Nejati, Kamellia , Dai, Hongxing et al. Ultrasonic-assisted synthesis of Ni based-layered double hydroxide doped carbon nanotube and its highly efficient in water oxidation reaction [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 48 (9) : 3429-3439 . |
MLA | Foruzin, Leila Jafari et al. "Ultrasonic-assisted synthesis of Ni based-layered double hydroxide doped carbon nanotube and its highly efficient in water oxidation reaction" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 48 . 9 (2023) : 3429-3439 . |
APA | Foruzin, Leila Jafari , Nejati, Kamellia , Dai, Hongxing , Rezvani, Zolfaghar . Ultrasonic-assisted synthesis of Ni based-layered double hydroxide doped carbon nanotube and its highly efficient in water oxidation reaction . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 48 (9) , 3429-3439 . |
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摘要 :
一种高效催化氧化二氯甲烷的RuO2/Nb2O5/CeO2催化剂及制备方法,属于催化化学与环境化学领域。首先制备纳米CeO2;然后将草酸铌铵(C2H2O4·x(NH3)·x(Nb))溶液负载到CeO2纳米催化剂上干燥焙烧得到Nb2O5/CeO2纳米催化剂,将RuCl3水溶液负载到Nb2O5/CeO2纳米催化剂上干燥焙烧得到RuO2/Nb2O5/CeO2催化剂,记为RuNbCe。本发明的催化剂制备工艺简单,合成过程可控,对二氯甲烷表现出良好的催化活性,且抗氯中毒性能强,使用寿命长,在大气污染控制领域具有良好的应用前景。
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GB/T 7714 | 邓积光 , 郝文成 , 王治伟 et al. 一种高效催化氧化二氯甲烷的RuO2/Nb2O5/CeO2催化剂及制备方法 : CN202310145431.6[P]. | 2023-02-21 . |
MLA | 邓积光 et al. "一种高效催化氧化二氯甲烷的RuO2/Nb2O5/CeO2催化剂及制备方法" : CN202310145431.6. | 2023-02-21 . |
APA | 邓积光 , 郝文成 , 王治伟 , 戴洪兴 , 刘雨溪 , 敬林 et al. 一种高效催化氧化二氯甲烷的RuO2/Nb2O5/CeO2催化剂及制备方法 : CN202310145431.6. | 2023-02-21 . |
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摘要 :
一种三维有序大孔钴酸镧负载钯铑锰三元金属催化剂及应用,属于功能材料技术领域。制备方法为:在二苄醚中,采用油相还原法,将乙酰丙酮钯、乙酰丙酮铑和十羰基二锰热解还原,形成PdRhMn三元合金,将得到的PdRhMn纳米晶负载到三维有序大孔(3DOM)LaCoO3载体上,随后经过一步高温灼烧过程,得到PdRhMn/3DOM LaCoO3纳米催化剂。本发明所得催化剂制备过程简单,应用于天然气车尾气净化具有优异的氧化还原活性。
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GB/T 7714 | 刘雨溪 , 田欣荣 , 戴洪兴 et al. 一种三维有序大孔钴酸镧负载钯铑锰三元金属催化剂及应用 : CN202310125406.1[P]. | 2023-02-16 . |
MLA | 刘雨溪 et al. "一种三维有序大孔钴酸镧负载钯铑锰三元金属催化剂及应用" : CN202310125406.1. | 2023-02-16 . |
APA | 刘雨溪 , 田欣荣 , 戴洪兴 , 邓积光 . 一种三维有序大孔钴酸镧负载钯铑锰三元金属催化剂及应用 : CN202310125406.1. | 2023-02-16 . |
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摘要 :
一种高效光解水制氢的富氮空位Se掺杂型石墨相氮化碳光催化剂,属于催化剂技术领域。通过采用Se辅助的化学气相沉积(CVD)可控制备工艺,成功构建了富氮空位Se掺杂型石墨相氮化碳(VN/Se‑CN)光催化剂。制备过程中,真空密封于石英安瓿瓶中的石墨相氮化碳在Se蒸汽的高温刻蚀反应下,同时实现了Se元素的掺杂以及氮空位的形成。富氮空位Se掺杂型石墨相氮化碳光催化剂展现出了优异的可见光水分解制氢性能(5418μmol h‑1g‑1)。
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GB/T 7714 | 敬林 , 张启超 , 戴洪兴 et al. 一种高效光解水制氢的富氮空位Se掺杂型石墨相氮化碳光催化剂 : CN202310201804.7[P]. | 2023-03-01 . |
MLA | 敬林 et al. "一种高效光解水制氢的富氮空位Se掺杂型石墨相氮化碳光催化剂" : CN202310201804.7. | 2023-03-01 . |
APA | 敬林 , 张启超 , 戴洪兴 , 邓积光 , 刘雨溪 , 隗陆 . 一种高效光解水制氢的富氮空位Se掺杂型石墨相氮化碳光催化剂 : CN202310201804.7. | 2023-03-01 . |
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摘要 :
一种用于对多组分VOCs高效净化的贵金属和分子筛组合的串联式催化剂,属于催化领域。将制备的PtSn/CeO2和MnOx/HZSM‑5催化剂通过串联的方式组合。制备方法:采用溶剂热法,将乙酰丙酮铂和二水氯化亚锡同时还原,形成PtSn双金属纳米粒子,采用吸附法将其负载到CeO2载体上,将负载后的催化剂先在管式炉中焙烧,形成PtSn/CeO2双金属纳米催化剂,采用浸渍法制备出MnOx/HZSM‑5催化剂。本发明所制备的PtSn/CeO2&MnOx/HZSM‑5纳米催化剂制备过程简单,对甲苯和三氯乙烯的氧化表现出良好的催化活性,在大气污染控制领域具有良好的应用前景。
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GB/T 7714 | 刘雨溪 , 李泽娅 , 戴洪兴 et al. 一种用于对多组分VOCs高效净化的贵金属和分子筛组合的串联式催化剂 : CN202310409567.3[P]. | 2023-04-17 . |
MLA | 刘雨溪 et al. "一种用于对多组分VOCs高效净化的贵金属和分子筛组合的串联式催化剂" : CN202310409567.3. | 2023-04-17 . |
APA | 刘雨溪 , 李泽娅 , 戴洪兴 , 邓积光 . 一种用于对多组分VOCs高效净化的贵金属和分子筛组合的串联式催化剂 : CN202310409567.3. | 2023-04-17 . |
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摘要 :
Zeolites have ordered pore structures, good spatial constraints, and superior hydrothermal stability. In addition, the active metal elements inside and outside the zeolite framework provide the porous material with adjustable acid-base property and good redox performance. Thus, zeolites-based catalysts are more and more widely used in chemical industries. Combining the advantages of zeolites and active metal components, the zeolites-based materials are used to catalyze the oxidation of methane to produce various products, such as carbon dioxide, methanol, formaldehyde, formic acid, acetic acid, and etc. This multifunction, high selectivity, and good activity are the key factors that enable the zeolites-based catalysts to be used for methane activation and conversion. In this review article, we briefly introduce and discuss the effect of zeolite materials on the activation of C-H bonds in methane and the reaction mechanisms of complete methane oxidation and selective methane oxidation. Pd/zeolite is used for the complete oxidation of methane to carbon dioxide and water, and Fe- and Cu-zeolite catalysts are used for the partial oxidation of methane to methanol, formaldehyde, formic acid, and etc. The prospects and challenges of zeolite-based catalysts in the future research work and practical applications are also envisioned. We hope that the outcome of this review can stimulate more researchers to develop more effective zeolite-based catalysts for the complete or selective oxidation of methane.
关键词 :
selective methane oxidation selective methane oxidation acid-base property acid-base property reaction mechanism reaction mechanism zeolite-based catalyst zeolite-based catalyst methane combustion methane combustion
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GB/T 7714 | Wu, Linke , Fan, Wei , Wang, Xun et al. Methane Oxidation over the Zeolites-Based Catalysts [J]. | CATALYSTS , 2023 , 13 (3) . |
MLA | Wu, Linke et al. "Methane Oxidation over the Zeolites-Based Catalysts" . | CATALYSTS 13 . 3 (2023) . |
APA | Wu, Linke , Fan, Wei , Wang, Xun , Lin, Hongxia , Tao, Jinxiong , Liu, Yuxi et al. Methane Oxidation over the Zeolites-Based Catalysts . | CATALYSTS , 2023 , 13 (3) . |
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摘要 :
The PdPtVOx/CeO2-ZrO2 (PdPtVOx/CZO) catalysts were obtained by using different approaches, and their physical and chemical properties were determined by various techniques. Catalytic activities of these materials in the presence of H2O or SO2 were evaluated for the oxidation of ethylbenzene (EB). The PdPtVOx/CZO sample exhibited high catalytic activity, good hydrothermal stability, and reversible sulfur dioxide-poisoning performance, over which the specific reaction rate at 160 degrees C, turnover frequency at 160 degrees C (TOFPd or Pt), and apparent activation energy were 72.6 mmol/(g(Pt)& sdot;sec) or 124.2 mmol/(g(Pd)& sdot;sec), 14.2 sec(-1) (TOFPt) or 13.1 sec(-1) (TOFPd), and 58 kJ/mol, respectively. The large EB adsorption capacity, good reducibility, and strong acidity contributed to the good catalytic performance of PdPtVOx/CZO. Catalytic activity of PdPtVOx/CZO decreased when 50 ppm SO2 or (1.0 vol.% H2O + 50 ppm SO2) was added to the feedstock, but was gradually restored to its initial level after the SO2 was cut off. The good reversible sulfur dioxide-resistant performance of PdPtVOx/CZO was associated with the facts: (i) the introduction of SO2 leads to an increase in surface acidity; (ii) V can adsorb and activate SO2, thus accelerating formation of the SOx2- (x = 3 or 4) species at the V and CZO sites, weakening the adsorption of sulfur species at the PdPt active sites, and hence protecting the PdPt active sites to be not poisoned by SO2. EB oxidation over PdPtVOx/CZO might take place via the route of EB -> styrene -> phenyl methyl ketone -> benzaldehyde -> benzoic acid -> maleic anhydride -> CO2 and H2O.(c) 2023 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
关键词 :
Ceria-zirconia Ceria-zirconia Supported Supported Volatile organic compound Volatile organic compound palladium-platinum-vanadium catalyst palladium-platinum-vanadium catalyst Sulfur dioxide resistance Sulfur dioxide resistance Ethylbenzene oxidation Ethylbenzene oxidation
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GB/T 7714 | Wang, Jia , Liu, Yuxi , Deng, Jiguang et al. PdPtVOx /CeO2 -ZrO2 : Highly efficient catalysts with good sulfur dioxide-poisoning reversibility for the oxidative removal of ethylbenzene [J]. | JOURNAL OF ENVIRONMENTAL SCIENCES , 2023 , 138 : 153-166 . |
MLA | Wang, Jia et al. "PdPtVOx /CeO2 -ZrO2 : Highly efficient catalysts with good sulfur dioxide-poisoning reversibility for the oxidative removal of ethylbenzene" . | JOURNAL OF ENVIRONMENTAL SCIENCES 138 (2023) : 153-166 . |
APA | Wang, Jia , Liu, Yuxi , Deng, Jiguang , Jing, Lin , Hao, Xiuqing , Zhang, Xing et al. PdPtVOx /CeO2 -ZrO2 : Highly efficient catalysts with good sulfur dioxide-poisoning reversibility for the oxidative removal of ethylbenzene . | JOURNAL OF ENVIRONMENTAL SCIENCES , 2023 , 138 , 153-166 . |
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