Highly dispersed Ni2-xMoxP nanoparticles on oxygen-defect-rich NiMoO4-y nanosheets as an active electrocatalyst for alkaline hydrogen evolution reaction

时间:2019-12-29作者:浏览量:641


Highly dispersed Ni2-xMoxP nanoparticles on oxygen-defect-rich NiMoO4-y nanosheets as an active electrocatalyst for alkaline hydrogen evolution reaction


作者:Chen, ZJ (Chen, Zhengjun)[ 1 ] ; Zhong, HF (Zhong, Huafu)[ 1 ] ; Hu, WJ (Hu, Wenjun)[ 1 ] ; Yin, H (Yin, Hui)[ 1 ] ; Cao, GX (Cao, Guoxuan)[ 1 ] ; Wen, H (Wen, He)[ 1 ] ; Wang, JJ (Wang, Jiajun)[ 1 ] ; Wang, P (Wang, Ping)[ 1 ]


JOURNAL OF POWER SOURCES


卷: 444

文献号: 227311


DOI: 10.1016/j.jpowsour.2019.227311


出版年: DEC 31 2019


文献类型:Article


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摘要

Development of high-performance electrocatalysts requires a comprehensive consideration of intrinsic activity, number of active sites and electrical conductivity. Herein, we report the facile synthesis of a highly active electrocatalyst towards alkaline hydrogen evolution reaction (HER), which involves a joint application of composition modulation, nanostructuring and defect engineering strategies to address the three key issues. A 3D hierarchically nanostructured Ni2-xMoxP/NiMoO4-y catalyst is synthesized using hydrothermal in combination with phosphorization methods. Phosphorization treatment of the ammonium nickel molybdate precursor results in the concurrent formation of highly dispersed Mo-doped Ni2P nanoparticles and oxygen-defect-rich NiMoO4-y substrate, which work in concert to provide synergistic active sites for alkaline HER. The presence of abundant oxygen-vacancies in NiMoO4 lattice leads to significant improvement of electrical conductivity. Furthermore, the nanoporous hierarchical structure of the catalyst promises abundance of accessible active sites and an improved reactant/product mass transfer kinetics. As a consequence of the favorable combination of these attributes, the non-precious Ni2-xMoxP/NiMoO4-y catalyst exhibits an intriguing catalytic performance towards the HER in alkaline solution, with an overpotential of similar to 36 mV at a current density of 10 mA cm(-2) and a Tafel slope of 53 mV dec(-1), which are among the best reported values of noble-metal-free electrocatalysts for alkaline HER.


关键词

作者关键词:Alkaline hydrogen evolution reaction; Synergistic catalysis; Transition metal phosphides; Oxygen vacancy


KeyWords Plus:EFFICIENT; PHOSPHIDE; CATALYST; SUPERIOR; OXIDE; PLATINUM; RANGE; FILM


作者信息

通讯作者地址: Wang, P (通讯作者)


显示更多South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.

地址:


显示更多[ 1 ] South China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China

电子邮件地址:mspwang@scut.edu.cn


基金资助致谢

基金资助机构显示详情授权号

National Natural Science Foundation of China


51621001

National Key R&D Program of China

2018YFB1502100

Foundation for Research Groups of the Natural Science Foundation of Guangdong Province

2016A030312011

National Natural Science Foundation of China


51671087

Special Support Plan for National 10000-talents Program  

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出版商

ELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS


期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Chemistry; Electrochemistry; Energy & Fuels; Materials Science


Web of Science 类别:Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary