Facile Synthesis of Nanoporous Pt-Encapsulated Ir Black as a Bifunctional Oxygen Catalyst via Modified Polyol Process at Room Temperature

doi:10.1002/celc.201900824

	Facile Synthesis of Nanoporous Pt-Encapsulated Ir Black as a Bifunctional Oxygen Catalyst via Modified Polyol Process at Room Temperature
	Fang, Dahui 1,2; Zhang, Hongjie 2; He, Liang 1,2; Geng, Jiangtao 2; Song, Wei 2; Sun, Shucheng 2; Shao, Zhigang 2; Yi, Baolian 2
刊名	CHEMELECTROCHEM
	2019-07-15
卷号	6 期号:14 页码:3633-3643
关键词	unitized regenerative fuel cell bifunctional catalyst oxygen reduction reaction oxygen evolution reaction polyol process
ISSN号	2196-0216
DOI	10.1002/celc.201900824
通讯作者	Shao, Zhigang(zhgshao@dicp.ac.cn)
英文摘要	The exploitation of a bifunctional oxygen catalyst with high efficiency is crucial for a high-performance unitized regenerative fuel cell (URFC). However, the existing bifunctional oxygen catalysts still suffer from low catalytic efficiency due to sluggish oxygen electrode reactions toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Herein, we report on a facile synthesis of nanoporous Pt-encapsulated Ir black with Pt/Ir mass ratio of 55/45 (Pt-55@Ir-45) via a newly modified polyol process at room temperature with the aid of water. The resulting Pt-55@Ir-45 catalyst demonstrated to be highly efficient and robust for both ORR and OER, relative to a mixture of commercial Pt and Ir black with Pt/Ir mass ratio of 50/50 (Pt-50/Ir-50). Mass activity of Pt-55@Ir-45 presented an 8.7- and 1.6-fold increase toward ORR and OER, respectively, compared with the Pt-50/Ir-50 catalyst. The enhanced bifunctional performance was rationalized in terms of the maximized Pt utilization, achieved by the excellent dispersion of Pt nanoparticles, and the nanoporous Pt layer constructing a conductive network without impeding the transport of oxygen and water molecules. Our work demonstrates an effective means to encapsulate nanoporous Pt layers on Ir black for the fabrication of bifunctional oxygen catalysts.
资助项目	National Major Research Project[2018YFB0106503] ; National Natural Science Foundation of China[21576257] ; Natural Science Foundation-Liaoning United Fund[U1508202] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB06050303]
WOS关键词	REDUCTION REACTION ; BIMETALLIC NANODENDRITES ; IRIDIUM OXIDE ; ELECTROCATALYST ; NANOPARTICLES ; ELECTRODE ; EVOLUTION ; LAYER ; OPTIMIZATION ; PERFORMANCE
WOS研究方向	Electrochemistry
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000477961200010
资助机构	National Major Research Project ; National Major Research Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation-Liaoning United Fund ; Natural Science Foundation-Liaoning United Fund ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Major Research Project ; National Major Research Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation-Liaoning United Fund ; Natural Science Foundation-Liaoning United Fund ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Major Research Project ; National Major Research Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation-Liaoning United Fund ; Natural Science Foundation-Liaoning United Fund ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Major Research Project ; National Major Research Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Natural Science Foundation-Liaoning United Fund ; Natural Science Foundation-Liaoning United Fund ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/173940]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Shao, Zhigang
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Fuel Cell Syst & Engn Lab, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Fang, Dahui,Zhang, Hongjie,He, Liang,et al. Facile Synthesis of Nanoporous Pt-Encapsulated Ir Black as a Bifunctional Oxygen Catalyst via Modified Polyol Process at Room Temperature[J]. CHEMELECTROCHEM,2019,6(14):3633-3643.
APA	Fang, Dahui.,Zhang, Hongjie.,He, Liang.,Geng, Jiangtao.,Song, Wei.,...&Yi, Baolian.(2019).Facile Synthesis of Nanoporous Pt-Encapsulated Ir Black as a Bifunctional Oxygen Catalyst via Modified Polyol Process at Room Temperature.CHEMELECTROCHEM,6(14),3633-3643.
MLA	Fang, Dahui,et al."Facile Synthesis of Nanoporous Pt-Encapsulated Ir Black as a Bifunctional Oxygen Catalyst via Modified Polyol Process at Room Temperature".CHEMELECTROCHEM 6.14(2019):3633-3643.