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Synchrotron radiation in situ X-ray absorption fine structure and in situ X-ray diffraction analysis of a high-performance cobalt catalyst towards the oxygen reduction reaction
Qin, HY; Lin, LX; Jia, JK; Ni, HL; He, Y; Wang, J; Li, AG; Ji, ZG; Liu, JB
2017
Source PublicationPHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN1463-9076
Volume19Issue:45Pages:30749-30755
Subtype期刊论文
AbstractTransition metal-based composites are one of the most important electrocatalysts because of their rich redox chemistry. The reaction kinetics of a redox couple is dependent on the chemical valence and is a key issue in electrocatalytic performance. In this study, a metallic Co catalyst was synthesized by pyrolyzing Co(OH)(2). The effect of the chemical valence of Co on the oxygen reduction reaction ( ORR) was investigated by comparing the electrocatalytic properties of three Co-based catalysts containing Co-0, Co2+, and Co3+. The electrocatalytic properties were evaluated mainly by linear scan voltammetry (LSV) and a direct borohydride fuel cell (DBFC) where the Co-based catalysts were used as cathodes. The LSV results show that the ORR peak current density increases with a decrease in chemical valence. The DBFC with the Co-0 cathode exhibits highest power density and good durability. In situ X-ray diffraction combined with in situ X-ray absorption fine structure tests was carried out to reveal the dynamic microstructure evolution of the Co-0 cathode during ORR. The in situ results clearly demonstrate the evolution of metallic Co to Co(OH) (2) and then to CoOOH during the ORR.
KeywordBorohydride Fuel-cell Electrocatalytic Activity Carbon Hydroxide Nitrogen Cathode Surface Anodes Oxide
DOI10.1039/c7cp05888h
Indexed BySCI
WOS KeywordBOROHYDRIDE FUEL-CELL ; ELECTROCATALYTIC ACTIVITY ; CARBON ; HYDROXIDE ; NITROGEN ; CATHODE ; SURFACE ; ANODES ; OXIDE
Language英语
WOS IDWOS:000416054400046
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28841
Collection中科院上海应用物理研究所2011-2019年
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GB/T 7714
Qin, HY,Lin, LX,Jia, JK,et al. Synchrotron radiation in situ X-ray absorption fine structure and in situ X-ray diffraction analysis of a high-performance cobalt catalyst towards the oxygen reduction reaction[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2017,19(45):30749-30755.
APA Qin, HY.,Lin, LX.,Jia, JK.,Ni, HL.,He, Y.,...&Liu, JB.(2017).Synchrotron radiation in situ X-ray absorption fine structure and in situ X-ray diffraction analysis of a high-performance cobalt catalyst towards the oxygen reduction reaction.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,19(45),30749-30755.
MLA Qin, HY,et al."Synchrotron radiation in situ X-ray absorption fine structure and in situ X-ray diffraction analysis of a high-performance cobalt catalyst towards the oxygen reduction reaction".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 19.45(2017):30749-30755.
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