Scholarlink

<p>The modification of NiFe layered double hydroxide (LDH)-based catalysts has garnered significant attention as a promising strategy for enhancing oxygen evolution reaction (OER) efficiency. In this work, graphite felt (GF) was modified using sodium thiosulfate as a sulfur source, followed by the deposition of NiFe LDH via a one-step hydrothermal process. The sulfur-treated GF electrodes exhibited an increased defect density and a well-developed microporous structure, which improved catalyst adhesion. Electrochemical evaluations demonstrated that the S-Ni<sub>7</sub>Fe<sub>3</sub> LDH/TGF exhibited superior OER activity, achieving an overpotential of 290&#xa0;mV at 10&#xa0;mA&#xa0;cm<sup>−2</sup> and a Tafel slope of 87.84&#xa0;mV dec<sup>−1</sup>, outperforming the unmodified Ni<sub>7</sub>Fe<sub>3</sub> LDH/TGF (302&#xa0;mV). Additionally, the modified electrode displayed remarkable durability, sustaining 310&#xa0;h of operation under demanding conditions (1&#xa0;M KOH, 1 A cm<sup>−2</sup>, and 60&#xa0;°C), underscoring its robust electrochemical stability. This study highlights the critical role of substrate modification in enhancing electrocatalytic efficiency and provides a promising pathway for developing high-performance OER catalysts for industrial applications through three-dimensional carbon-based engineering.</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

Synergistic integration of sulfur-modified graphite felt electrode with NiFe LDH catalysts for enhanced OER efficiency

  • 期刊论文

  • 发表日期：

    2025年4月23日

查看全文
  • Danni Li,
  • Muhammad Umair Mushtaq,
  • Yingming Tang,
  • Sa Li,
  • Fubin Hou,
  • Khurram Shahzad Ayub,
  • Limei Cao,
  • Ji Yang

摘要

The modification of NiFe layered double hydroxide (LDH)-based catalysts has garnered significant attention as a promising strategy for enhancing oxygen evolution reaction (OER) efficiency. In this work, graphite felt (GF) was modified using sodium thiosulfate as a sulfur source, followed by the deposition of NiFe LDH via a one-step hydrothermal process. The sulfur-treated GF electrodes exhibited an increased defect density and a well-developed microporous structure, which improved catalyst adhesion. Electrochemical evaluations demonstrated that the S-Ni7Fe3 LDH/TGF exhibited superior OER activity, achieving an overpotential of 290 mV at 10 mA cm−2 and a Tafel slope of 87.84 mV dec−1, outperforming the unmodified Ni7Fe3 LDH/TGF (302 mV). Additionally, the modified electrode displayed remarkable durability, sustaining 310 h of operation under demanding conditions (1 M KOH, 1 A cm−2, and 60 °C), underscoring its robust electrochemical stability. This study highlights the critical role of substrate modification in enhancing electrocatalytic efficiency and provides a promising pathway for developing high-performance OER catalysts for industrial applications through three-dimensional carbon-based engineering.