Citation: FENG Ji-Wei, ZHOU Qi. Effect of Different Co contents on Structure of Nanoporous Ni-Co and Catalytic Performance of Hydrogen Evolution[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(10): 1746-1754. doi: 10.11862/CJIC.2019.215 shu

Effect of Different Co contents on Structure of Nanoporous Ni-Co and Catalytic Performance of Hydrogen Evolution

FENG Ji-Wei ,
ZHOU Qi ^,

State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China

Corresponding author: ZHOU Qi, zhouxq301@sina.com
Received Date: 13 May 2019
Revised Date: 22 July 2019

Figures(10)

Ni-Co-Al alloys with different Co contents were prepared by vacuum smelting and rapid solidification. XRD, SEM, TEM and N₂ adsorption-desorption were used on the structure characterization of nanoporous Ni-Co, and the hydrogen evolution performance of nanoporous Ni-Co/GCE electrode was tested by linear sweep voltammetry (LSV) and ac impedance(IMP). The results showed that there were smaller pores (5~10 nm) on the surface of the nanoporous Ni-Co alloy skeleton, and the catalytic performance of hydrogen evolution was better when the Co content was 40%~60% (w/w). Among them, the pores of Ni_2.5Co_2.5 and Ni₃Co₂ are almost uniform, and they have smaller mesoporous pores than others, which is beneficial to the infiltration of electrolyte and increase the surface area of the electrode.Therefore, Ni_2.5Co_2.5/GCE and Ni₃Co₂/GCE have high hydrogen evolution performance. When the current density was -0.005 A·cm^-2, the hydrogen evolution potential of the two electrodes were almost the same as 380 mV.
- dealloying,
- nanoporous Ni-Co alloy,
- hydrogen evolution performance
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