Scholarlink

<p>The primary challenge in large-scale electrochemical hydrogen production via water splitting lies in the sluggish four-electron kinetics of the oxygen evolution reaction (OER), a key bottleneck in the process. Developing high-performance OER electrocatalysts is essential for addressing this limitation. In this work, we report the controllable synthesis of high-entropy layered hydroxides (HELH) under mild conditions for enhanced OER activity, addressing the limitations of conventional catalysts in component regulation. This mild reaction environment allows for precise control over both the fine structure and elemental composition of the resulting material. The synthesized catalyst achieves a current density of 100&#xa0;mA&#xa0;cm<sup>−2</sup> in 0.1&#xa0;M KOH at an overpotential of 276&#xa0;mV, with remarkable stability demonstrating no significant performance degradation after 100&#xa0;h of continuous operation. The high-entropy engineering and fine nanostructure control present a new avenue for tackling issues of low intrinsic activity, limited active sites, and low conductivity in layered double hydroxide (LDH) catalysts during OER.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Metal organic framework derived high entropy layered hydroxides for efficient oxygen evolution reaction

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月31日

查看全文
  • Weijian Sun,
  • Sifan Liu,
  • Huiting Mao,
  • Yong Xu,
  • Liangping Xiao

摘要

The primary challenge in large-scale electrochemical hydrogen production via water splitting lies in the sluggish four-electron kinetics of the oxygen evolution reaction (OER), a key bottleneck in the process. Developing high-performance OER electrocatalysts is essential for addressing this limitation. In this work, we report the controllable synthesis of high-entropy layered hydroxides (HELH) under mild conditions for enhanced OER activity, addressing the limitations of conventional catalysts in component regulation. This mild reaction environment allows for precise control over both the fine structure and elemental composition of the resulting material. The synthesized catalyst achieves a current density of 100 mA cm−2 in 0.1 M KOH at an overpotential of 276 mV, with remarkable stability demonstrating no significant performance degradation after 100 h of continuous operation. The high-entropy engineering and fine nanostructure control present a new avenue for tackling issues of low intrinsic activity, limited active sites, and low conductivity in layered double hydroxide (LDH) catalysts during OER.