过电位
电解
制氢
非阻塞I/O
无定形固体
合金
材料科学
电解水
碱性水电解
氯化物
阳极
X射线光电子能谱
蚀刻(微加工)
氢
分解水
阴极
化学工程
无机化学
冶金
电解质
化学
电化学
纳米技术
结晶学
物理化学
催化作用
电极
有机化学
工程类
光催化
生物化学
图层(电子)
作者
I. Flis-Kabulska,J. Flis
标识
DOI:10.1002/celc.202201036
摘要
Abstract Highly active and easily available electrocatalysts are of great importance for a wider use of water electrolysis for hydrogen production. Herein, electroactivity toward hydrogen evolution reaction was examined in 1.0 M KOH on commercial Ni 81 P 19 (MBF‐60) and Ni 70 Cr 6 Fe 2 B 14 Si 8 (MBF‐20A) amorphous alloys and for comparison on Ni, untreated and modified by anodic etching in hot concentrated NaCl solutions. This treatment increased the electroactivity of all the materials, but especially of Ni 81 P 19 and particularly of matte side of its ribbons, decreasing overpotential at −10 mA cm −2 to −0.14 V. XRD, SEM/EDS and XPS studies were carried out. EIS measurements indicated that the rise of hydrogen evolution after etching was related mainly to the increase of surface area, and only slightly to the rise of intrinsic electroactivity, probably being due to the formation of NiO. It is proposed that etched Ni 81 P 19 might be an efficient cathode for hydrogen production by water electrolysis.
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