材料科学
析氧
过电位
氧化物
电解
化学工程
过渡金属
催化作用
无机化学
多元醇
电解质
钨
电化学
电极
化学
冶金
物理化学
复合材料
生物化学
工程类
聚氨酯
作者
Airi Takeda,Hidenori Hiraoka,Kota Nakamura,Arisu Sakai,Yoshihisa Sakata,Masaaki Yoshida,Masashi Azuma,Masaharu Nakayama
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-07-01
卷期号:169 (7): 076510-076510
被引量:3
标识
DOI:10.1149/1945-7111/ac7fbe
摘要
The development of inexpensive transition metal-based catalysts for water splitting has attracted global attention, which should be accomplished in the simplest and most scalable way feasible. In this study, nickel and iron co-incorporated tungsten oxides (Ni x Fe 1-x WO 4 ) were synthesized using a simple polyol method, and the materials achieved a highly efficient and stable oxygen evolution reaction (OER) in an alkaline electrolyte. The product as-synthesized using the polyol method consisted of an undeveloped wolframite structure, which was converted to its complete crystal by heat treatment at 600 °C, with an increase in crystallite size. The OER properties of Ni x Fe 1-x WO 4 could be controlled by the ratio of Ni and Fe present and heat treatment temperature. A ternary tungsten oxide (Ni 0.5 Fe 0.5 WO 4 ) with a Ni:Fe:W molar ratio of 0.5:0.5:1 deposited on a glassy carbon electrode required 297 mV to reach a current density of 10 mA cm −2 in 1.0 M KOH solution. The 10 mA cm −2 electrolysis with the electrode was continued for at least 100 h. This was quite different from a similarly-synthesized NiFe oxide without W, which required an additional 47-mV overpotential to reach 10 mA cm −2 and had inferior durability.
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