Polyol Synthesis of Ni and Fe Co-Incorporated Tungsten Oxide for Highly Efficient and Durable Oxygen Evolution Reaction
Polyol Synthesis of Ni and Fe Co-Incorporated Tungsten Oxide for Highly Efficient and Durable Oxygen Evolution Reaction
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多元醇合成镍铁共掺氧化钨用于高效、持久的析氧反应
DOI：
10.1149/1945-7111/ac7fbe
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发表时间：
2022
影响因子：
3.9
通讯作者：
and Masaharu Nakayama
中科院分区：
文献类型：
--
作者：
Airi Takeda;Hidenori Hiraoka;Kota Nakamura;Arisu Sakai;Yoshihisa Sakata;Masaaki Yoshida;Masanobu Azuma;and Masaharu Nakayama
廉价的过渡金属基水裂解催化剂的开发已引起全球的关注，应以最简单和最可扩展的方式完成。本研究采用简单的多元醇法合成了镍铁共掺杂钨氧化物（Ni x Fe 1-x wo4），该材料在碱性电解质中实现了高效稳定的析氧反应（OER）。多元醇法合成的产物为未发育的黑钨矿结构，在600℃下热处理后转变为完整的黑钨矿晶体，晶粒尺寸增大。Ni x Fe 1-x wo4的OER性能可由Ni和Fe的存在比和热处理温度控制。将Ni: Fe: W摩尔比为0.5:0.5:1的三元氧化钨（Ni 0.5 Fe 0.5 wo4）沉积在玻碳电极上，在1.0 M KOH溶液中需要297 mV才能达到10 mA cm−2的电流密度。用该电极进行10 mA cm−2的电解至少持续100小时。这与不含W的类似合成的NiFe氧化物有很大不同，后者需要额外的47 mv过电位才能达到10 mA cm−2，并且耐久性较差。
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.