泡沫镍基Ni-P-W-Mo析氢电极的制备与电化学性能

doi:10.19976/j.cnki.43-1448/TF.2022035

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Abstract Nickel sulfate, sodium hypophosphite, sodium tungstate, and sodium molybdate were used as raw materials to synthesize Ni-P-W-Mo hydrogen evolution electrode on nickel foam by one-step galvanostatic electrodeposition method. The surface morphology, elemental composition, and electrochemical hydrogen evolution properties of the materials were investigated by means of X-ray diffraction, SEM, Energy X-ray spectrometry, X-ray photoelectron spectroscopy and electrochemical testing. The results show that Ni-P-W-Mo electrode has excellent catalytic activity and stability after catalyzed hydrogen evolution in alkaline solution. The current density of 10 mA/cm² can be reached only at 92 mV over potential, which is 67 mV lower than that of Ni-P electrode. The double-layer capacitance of Ni-P-W-Mo electrode is 42.98 mF/cm². After 2000 cyclic voltammetry cycles, the hydrogen evolution activity of the electrode decreases only slightly. The excellent catalytic performance of Ni-P-W-Mo electrode may be due to the addition of W and Mo elements to the Ni-P electrode which makes the electrode surface coarser, greatly increasing the electrochemical active surface area and active site of the electrode. Meanwhile, the self-supported electrode structure can effectively reduce the interfacial transmission resistance and improve the charge transmission efficiency.

Key words： transition metal phosphide Ni-P-W-Mo electrocatalyst electrodeposition hydrogen evolution reaction nickel foam

Received: 30 March 2022 Published: 27 January 2023

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Cite this article:

DAI Xiaomei,HE Hanwei. Preparation and electrochemical properties of Ni-P-W-Mo hydrogen evolution electrode based on nickel foam[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(6): 610-619.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022035 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I6/610

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