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Time-Dependent Surface Structure Evolution of NiMo Films Electrodeposited Under Super Gravity Field as Electrocatalyst for Hydrogen Evolution Reaction
Yu, Xiangtao1; Wang, Mingyong2; Wang, Zhi2; Gong, Xuzhong2; Guo, Zhancheng1
2017-08-10
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume121Issue:31Pages:16792-16802
Abstract

The surface structures of the electrodeposited NiMo films from compact to porous structure are adjusted by the combination of gravity acceleration and electrodeposition time. The evolution mechanism of surface structure is discussed based on the protrusion growth theory. The dependence of catalytic activity of the NiMo films for hydrogen evolution reaction (HER) on surface structure evolution is studied. The results indicate that compact NiMo layer is first electrodeposited, and then protrusions are formed. Finally, the protrusions rapidly grow and form a porous structure. It is found that only the compact NiMo films are electrodeposited under normal gravity condition due to a long induced time for the protrusions formation. Under super gravity field, the induced time for the protrusions formation is only less than 5 man owing to the enhanced mass transfer by the gravity-induced convection and hydrogen bubble agitation convection. So, a porous structure is easily formed under high gravity acceleration and long electrodeposition time. The HER activities of NiMo films are improved with the surface structure evolution from compact to porous structure due to the increase of active area. All NiMo films exhibit a good long-term durability, and the cell voltage of water electrolysis on porous NiMo films is lower.

SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/acs.jpcc.7b03822
Indexed BySCI
Language英语
WOS KeywordMo Alloy Coatings ; Induced Codeposition ; Copper Electrodeposits ; Water Electrolysis ; Centrifugal Fields ; Catalytic-activity ; Thin-films ; Nickel ; Morphology ; Efficient
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
Funding OrganizationNatural Science Foundation of China(51274180 ; Youth Innovation Promotion Association, CAS(2015036) ; 51422405)
WOS IDWOS:000407655900013
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23165
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Yu, Xiangtao,Wang, Mingyong,Wang, Zhi,et al. Time-Dependent Surface Structure Evolution of NiMo Films Electrodeposited Under Super Gravity Field as Electrocatalyst for Hydrogen Evolution Reaction[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2017,121(31):16792-16802.
APA Yu, Xiangtao,Wang, Mingyong,Wang, Zhi,Gong, Xuzhong,&Guo, Zhancheng.(2017).Time-Dependent Surface Structure Evolution of NiMo Films Electrodeposited Under Super Gravity Field as Electrocatalyst for Hydrogen Evolution Reaction.JOURNAL OF PHYSICAL CHEMISTRY C,121(31),16792-16802.
MLA Yu, Xiangtao,et al."Time-Dependent Surface Structure Evolution of NiMo Films Electrodeposited Under Super Gravity Field as Electrocatalyst for Hydrogen Evolution Reaction".JOURNAL OF PHYSICAL CHEMISTRY C 121.31(2017):16792-16802.
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