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Designing oxide catalysts for Oxygen Electrocatalysis: Insights from Mechanism to Application

Nano-Micro Letters 2023年第10期15卷 514-546页

作者： Ning Han Wei Zhang Wei Guo Hui Pan Bo Jiang Lingbao Xing Hao Tian Guoxiu Wang Xuan Zhang Jan Fransaer Department of Materials Engineering KU Leuven3001 LeuvenBelgium ZJU‑Hangzhou Global Scientific and Technological Innovation Centre Zhejiang UniversityHangzhou 311200People’s Republic of China Department of Physics and Astronomy KU Leuven3001 LeuvenBelgium Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of TechnologyDalian 116023People’s Republic of China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255000People’s Republic of China Centre for Clean Energy Technology Faculty of ScienceUniversity of Technology SydneyBroadwayPO Box 123UltimoNSW 2007Australia

The electrochemical oxygen reduction reaction(ORR) and oxygen evolution reaction(OER) are fundamental processes in a range of energy conversion devices such as fuel cells and metal–air batteries. ORR and OER both have significant activation barriers, which severely limit the overall performance of energy conversion devices that utilize ORR/OER. Meanwhile, ORR is another very important electrochemical reaction involving oxygen that has been widely investigated. ORR occurs in aqueous solutions via two pathways: the direct 4-electron reduction or 2-electron reduction pathways from O_(2) to water(H_2O) or from O_(2) to hydrogen peroxide(H_2O_(2)). Noble metal electrocatalysts are often used to catalyze OER and ORR, despite the fact that noble metal electrocatalysts have certain intrinsic limitations, such as low storage. Thus, it is urgent to develop more active and stable low-cost electrocatalysts, especially for severe environments(e.g., acidic media). Theoretically, an ideal oxygen electrocatalyst should provide adequate binding to oxygen species. Transition metals not belonging to the platinum group metal-based oxides are a low-cost substance that could give a d orbital for oxygen species binding. As a result, transition metal oxides are regarded as a substitute for typical precious metal oxygen electrocatalysts. However, the development of oxide catalysts for oxygen reduction and oxygen evolution reactions still faces significant challenges, e.g., catalytic activity, stability, cost, and reaction mechanism. We discuss the fundamental principles underlying the design of oxide catalysts, including the influence of crystal structure, and electronic structure on their performance. We also discuss the challenges associated with developing oxide catalysts and the potential strategies to overcome these challenges.

关键词： Oxygen evolution Oxygen reduction oxide catalysts Catalyst design Fuel cell Metal–air batteries

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Influence of CeO2 on Properties and Activity of oxide catalysts in Carbon Monoxide Oxidation

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Journal of Chemistry and Chemical Engineering 2010年第2期4卷 48-55页

作者： Hoang Tien Cuong Luu Cam Loc Ho Si Thoang Institute of Chemical Technology Vietnam Academy of Science and Technology 1 Mac Dinh Chi Str. Ho Chi Minh City 70100Vietnam

A series of catalysts on the basis of 10 wt.% CuO/y-AI203, 10 wt.% CuO ＋ 10 wt.% Cr2O3/y-AI203 and 15 wt.% MnO2/y -A1203 have been prepared and modified by CeO2 with contents up to 20 wt.%. Physico-chemical properties of the catalysts were determined by the methods of BET Adsorption, XRD, and TPR. Oxidative activity of the catalysts was studied at the temperature range 90-220 ℃and CO concentration of 3 mol.%. Addition of CeO2 led to changes in physico-chemical properties of the catalysts and formation of novel active centres that increased the activity of CuO and Cr203 containing catalysts, but decreased the activity of those, containing MnO2. The catalyst sample containing 10 wt.% CuO and 15 wt.% CeO2 has been shown to be the best one for complete conversion of CO. At the given conditions on this catalyst the complete oxidation of CO to CO2 occurred at 130 ~C during more than 500 h.

关键词： CeO2 carbon monoxide oxide catalysts oxidation.

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A review on the structure-performance relationship of the catalysts during propane dehydrogenation reaction

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Petroleum Science 2022年第2期19卷 819-838页

作者： Bohan Feng Yue-Chang Wei Wei-Yu Song Chun-Ming Xu State Key Laboratory of Heavy Oil Processing College of ScienceChina University of PetroleumBeijing102249People's Republic of China

Dehydrogenation of propane(PDH)technology is one of the most promising on-purpose technologies to solve supply-demand unbalance of *** industrial catalysts for PDH,such as Pt-and Cr-based catalysts,still have their own limitation in expensive price and security ***,a deep understanding into the structure-performance relationship of the catalysts during PDH reaction is necessary to achieve innovation in advanced high-efficient *** this review,we focused on discussion of structure-performance relationship of catalysts in *** on analysis of reaction mechanism and nature of active sites,we detailed interaction mechanism between structure of active sites and catalytic performance in metal catalysts and oxide *** relationship between coke deposition,co-feeding gas,catalytic activity and nanostructure of the catalysts are also *** these discussions on the relationship between structure and performances,we try to provide the insights into microstructure of active sites in PDH and the rational guidance for future design and development of PDH catalysts.

关键词： Dehydrogenation of propane Metal catalysts oxide catalysts Structure-performance relationship Active site Reaction mechanism

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