On-line alleviation of poisoning in direct methanol fuel cells with pulse potential strategy

doi:10.1016/j.jpowsour.2019.02.025

	On-line alleviation of poisoning in direct methanol fuel cells with pulse potential strategy
	Sun, Hai 2; Sun, Xuejing 1,2; Yang, Linlin 2; Xia, Zhangxun 2; Sun, Gongquan 2
刊名	JOURNAL OF POWER SOURCES
	2019-04-15
卷号	419 页码:155-161
关键词	Direct methanol fuel cells Industrial grade methanol Impurities Performance recovery On-line pulse potential method
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2019.02.025
通讯作者	Sun, Hai(sunhai@dicp.ac.cn) ; Sun, Gongquan(gqsun@dicp.ac.cn)
英文摘要	Catalyst poisoning from the impurities in the industrial grade methanol is a major challenge for the large-scale application of direct methanol fuel cells in low cost. In this work, we systematically investigate the impurities influencing on cell performance, and confirm that the adsorption of carbonyl containing intermediate species derived from the partial electro-oxidation of the impurities is a crucial factor leading to performance degradation. Hence, an on-line alleviation strategy by intermittently applying pulse potential (reduction potential on the anode or oxidation potential on the cathode) is proposed. The applied potential will bring a reductive condition on the anode, which releases the active sites via the reduction of carbonyl containing species adsorbed on platinum-ruthenium electro-catalysts. Based on this strategy, the adsorption of carbonyl containing intermediate species are effectively suppressed, and the decay rate declines by nearly two orders of magnitude than that of a single cell under traditional operation, which paves a way for the practical application of direct methanol fuel cells with industrial grade methanol feed.
资助项目	National Natural Science Foundation of China[21576259] ; National Natural Science Foundation of China[21406222] ; National Natural Science Foundation of China[21406216] ; National Natural Science Foundation of China[21706251]
WOS关键词	ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY ; OXYGEN-REDUCTION ; OXIDATION ; PLATINUM ; PERFORMANCE ; ANODE ; ELECTROOXIDATION ; NANOPARTICLES ; FTIR ; ELECTROCATALYSIS
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000463305900020
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165668]
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	Sun, Hai; Sun, Gongquan
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Div Fuel Cells & Battery, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Sun, Hai,Sun, Xuejing,Yang, Linlin,et al. On-line alleviation of poisoning in direct methanol fuel cells with pulse potential strategy[J]. JOURNAL OF POWER SOURCES,2019,419:155-161.
APA	Sun, Hai,Sun, Xuejing,Yang, Linlin,Xia, Zhangxun,&Sun, Gongquan.(2019).On-line alleviation of poisoning in direct methanol fuel cells with pulse potential strategy.JOURNAL OF POWER SOURCES,419,155-161.
MLA	Sun, Hai,et al."On-line alleviation of poisoning in direct methanol fuel cells with pulse potential strategy".JOURNAL OF POWER SOURCES 419(2019):155-161.