泡沫镍基Ni-P-W-Mo析氢电极的制备与电化学性能

代晓梅; 何捍卫

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

粉末冶金材料科学与工程 >

2022 , Vol. 27 >Issue 6: 610 - 619

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

工艺技术

泡沫镍基Ni-P-W-Mo析氢电极的制备与电化学性能

代晓梅 ,
何捍卫

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中南大学粉末冶金研究院,长沙 410083

收稿日期: 2022-03-30

修回日期: 2022-06-23

网络出版日期: 2023-01-27

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Preparation and electrochemical properties of Ni-P-W-Mo hydrogen evolution electrode based on nickel foam

DAI Xiaomei ,
HE Hanwei

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Powder Metallurgy Research Institute, Central South University, Changsha 410083, China

Received date: 2022-03-30

Revised date: 2022-06-23

Online published: 2023-01-27

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摘要

以硫酸镍、次亚磷酸钠、钨酸钠、钼酸钠等为原料,采用一步恒电流电沉积法在泡沫镍基底上合成Ni-P-W-Mo析氢电极,借助X射线衍射、扫描电镜、能谱仪、X射线光电子能谱以及电化学测试等手段研究材料的表面形貌、元素组成以及电化学析氢性能。结果表明,Ni-P-W-Mo析氢电极在碱性溶液中析氢催化时有出色的催化活性和稳定性,仅需92 mV的过电位即可达到10 mA/cm²的电流密度,比Ni-P电极降低67 mV,电极的双层电容为42.98 mF/cm²,经过2 000次循环伏安(cyclic voltammetry, CV)测试后,析氢活性略微下降。Ni-P-W-Mo电极优异的催化性能可能是由于W、Mo的添加使电极的表面形貌更粗糙,电化学活性表面积和活性位点显著增加,同时自支撑电极结构可以有效降低界面传输电阻,提高电荷传输效率。

关键词： 过渡金属磷化物; Ni-P-W-Mo电催化剂; 电沉积; 析氢反应; 泡沫镍

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代晓梅 , 何捍卫 . 泡沫镍基Ni-P-W-Mo析氢电极的制备与电化学性能[J]. 粉末冶金材料科学与工程, 2022 , 27(6) : 610 -619 . DOI: 10.19976/j.cnki.43-1448/TF.2022035

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

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