Citation: Yi-lang MAI, Xiang-sheng XIE, Zhi-da WANG, Chang-feng YAN, Guang-hua LIU. Effect of heat treatment temperature on the Pt₃Co binary metal catalysts for oxygen reduced reaction and DFT calculations[J]. Journal of Fuel Chemistry and Technology, ;2022, 50(1): 114-121. doi: 10.1016/S1872-5813(21)60099-3 shu

Effect of heat treatment temperature on the Pt₃Co binary metal catalysts for oxygen reduced reaction and DFT calculations

Yi-lang MAI ^{1, 2, 3,} ,
Xiang-sheng XIE ^{1, 2, 3} ,
Zhi-da WANG ^{1, 2} ,
Chang-feng YAN ^{1, 2, 3,,} ,
Guang-hua LIU ⁴

1.
Hydrogen Production and Utilization Laboratory, Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
2.
Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China
4.
Dongguan Baida New Energy Shares Co., Ltd, Dongguan 523808, China

Corresponding author: Chang-feng YAN, yancf@ms.giec.ac.cn
Received Date: 19 March 2021
Revised Date: 29 April 2021

Figures(6)

Synthesis of low-cost, high-activity and high-stability Pt-based catalysts is of great importance to the large commercialization of proton exchange membrane fuel cell (PEMFC). Doping non-precious metals such as cobalt (Co) with Pt is attractive due to the reduced depletion of Pt and, more importantly, the enhanced activity on the oxygen reduction reaction (ORR) compared with pure Pt. In this work, carbon-supported platinum-cobalt nanoparticles (NPs) were prepared by the impregnation reduction method for the ORR catalyst. By changing the heat treatment temperature, the structure, the crystal phase and the size of the Pt₃Co nanoparticles could be controlled. TEM and XRD characterizations show that larger size NPs with higher alloying degree are obtained at higher temperature. The electrochemical results demonstrate that the Pt₃Co NPs at 800 ℃ have the highest mass activity (0.41 A/mg_Pt) and the best stability among all the samples due to their lower particle size and higher alloying degree. Further Density functional theory (DFT) calculation shows that the surface of the Pt₃Co structure with high alloying degree can reduce the rate-determining step barrier and improve the ORR activity.
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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Effect of heat treatment temperature on the Pt3Co binary metal catalysts for oxygen reduced reaction and DFT calculations

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通讯作者: 陈斌, bchen63@163.com

Effect of heat treatment temperature on the Pt₃Co binary metal catalysts for oxygen reduced reaction and DFT calculations