Highly stable and active Pt-skinned octahedral PtCu/C for oxygen reduction reaction

被引：10
|
作者：
Wu, Hao [1 ,2 ]
Zhong, Huichi [1 ,2 ]
Pan, Yingzhi [1 ,2 ]
Li, Huibin [1 ,2 ]
Peng, Ye [3 ,4 ,5 ]
Yang, Lijun [6 ]
Luo, Shasha [6 ]
Banham, Dustin [3 ,4 ,5 ]
Zeng, Jianhuang [1 ,2 ,6 ]
机构：
[1] South China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510641, Peoples R China
[2] Guangdong Key Lab Fuel Cell Technol, Guangzhou 510641, Peoples R China
[3] Foshan Univ, Sch Mat Sci & Hydrogen Energy, Foshan 528000, Peoples R China
[4] Guangdong Key Lab Hydrogen Energy Technol, Foshan 528000, Peoples R China
[5] Guangdong TaiJi Power, 25 Xingliang Rd,Hecheng St, Foshan 528000, Peoples R China
[6] Sino Sci Hydrogen Co Ltd, 25 Huanshi Rd, Guangzhou 511458, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2023年 / 656卷
关键词：
Octahedral; Oxygen reduction reaction; Activity and stability; SOLVOTHERMAL SYNTHESIS; HYDROGEN EVOLUTION; NANOCRYSTALS; COPPER; ELECTROCATALYSTS; NANOPARTICLES; NANOWIRES; CATALYSTS; ROBUST;
D O I：
10.1016/j.colsurfa.2022.130341
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Morphology-controlled Pt-based catalysts were synthesized by a solvothermal method and were used as oxygen reduction reaction (ORR) catalysts in proton exchange membrane fuel cells (PEMFCs). A mild acid treatment combined with electrochemical de-alloying was used to develop Pt-skinned octahedral PtCu/C-X catalysts. PtCu/ C exhibited a mass activity (MA) of 0.694 A mgPt- 1 @ 0.9 V and specific activity (SA) of 2.242 mA cm-2, respectively. After 30,000 potential cycles, the MA and SA of this catalyst were enhanced by 22% to 0.849 A mgPt- 1 and 110% to 4.697 mA cm-2, respectively. It is hypothesized that the rearrangement of surface Pt atoms in electrochemical de-alloying effectively filled the defects formed by acid treatment and enhanced the activity of the catalyst accordingly.
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页数：9
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