Annealing-temperature-dependent relation between alloying degree, particle size, and fuel cell performance of PtCo catalysts

doi:10.1016/j.jelechem.2022.116728

HFCAS OpenIR

	Annealing-temperature-dependent relation between alloying degree, particle size, and fuel cell performance of PtCo catalysts
	Zeng, Wei-Jie 1; Tong, Lei 1; Liu, Jun2,3 ; Liang, Hai-Wei 1
	2022-10-01
发表期刊	JOURNAL OF ELECTROANALYTICAL CHEMISTRY
ISSN	1572-6657
通讯作者	Liu, Jun(jliu@issp.ac.cn) ; Liang, Hai-Wei(hwliang@ustc.edu.cn)
摘要	Pt-M (M is typically 3d transition metal) alloy nanoparticles as the state-of-the-art electrocatalysts exhibit supe-rior activity for the sluggish cathodic oxygen reduction reaction (ORR) in proton-exchange-membrane fuel cells (PEMFCs). The specific activity (SA) of Pt-M alloy catalysts is strongly correlative to their surface compressive strains that are majorly dependent on the M type and content. In order to promote the alloying of Pt with M to improve the SA, a high-temperature annealing is normally inevitable, which however accelerates the metal sin-tering resulting in larger particles and lowers electrochemical surface areas (ECSAs) as well as the high-cur-rent???density PEMFCs performance. Herein, we systematically studied the ORR/PEMFCs performance of a family of PtCo catalysts with varied alloying degree and particle size, which were prepared at different anneal-ing temperatures ranging from 400 to 1000 ??C. We found the annealing-temperature-dependent trade-off rela-tion between the alloying-degree-dependent SA and particle-size-dependent ECSA. The optimal PtCo catalyst was thus achieved at a medium annealing temperature of 600 ??C, showing a high mass activity (MA) of 1.04 A mg???1 and a large rated power density of 1.07 W cm???2 with a low Pt loading of 0.1 mgPt cm???2. Superscript/Subscript Available
关键词	PtCo Oxygen reduction reaction Fuel cells Speci fic activity Alloying degree
DOI	10.1016/j.jelechem.2022.116728
关键词[WOS]	OXYGEN REDUCTION ; PLATINUM ; NANOPARTICLES ; ELECTROCATALYSTS ; REACTIVITY ; STRAIN ; IMPACT
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Electrochemistry
WOS类目	Chemistry, Analytical ; Electrochemistry
WOS记录号	WOS:000859733800015
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/129792
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Jun; Liang, Hai-Wei
作者单位	1.Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci Microscale, Dept Chem, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Hefei 230031, Peoples R China 3.Anhui Contango New Energy Technol Co Ltd, Hefei 230088, Peoples R China
通讯作者单位	中科院固体物理研究所
推荐引用方式 GB/T 7714	Zeng, Wei-Jie,Tong, Lei,Liu, Jun,et al. Annealing-temperature-dependent relation between alloying degree, particle size, and fuel cell performance of PtCo catalysts[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY,2022,922.
APA	Zeng, Wei-Jie,Tong, Lei,Liu, Jun,&Liang, Hai-Wei.(2022).Annealing-temperature-dependent relation between alloying degree, particle size, and fuel cell performance of PtCo catalysts.JOURNAL OF ELECTROANALYTICAL CHEMISTRY,922.
MLA	Zeng, Wei-Jie,et al."Annealing-temperature-dependent relation between alloying degree, particle size, and fuel cell performance of PtCo catalysts".JOURNAL OF ELECTROANALYTICAL CHEMISTRY 922(2022).