Scholarlink

<p>Developing efficient and stable oxygen evolution reaction (OER) electrocatalysts based on non-precious metals is crucial for cost-effective hydrogen production. Herein, we report the rapid synthesis of crystalline cobalt–nickel boride (CoNiB₂) nanoflowers via a liquid-phase soaking technology (LST). Using liquid boron oxide as the reaction medium enables the synthesis of highly active CoNiB₂ catalysts in just 20&#xa0;s. CoNiB₂ exhibits a lower energy barrier for the rate-determining step compared to CoB. As a result, the CoNiB₂ catalyst exhibits outstanding OER performance in alkaline media, requiring an overpotential of only 271 mV to achieve 10&#xa0;mA cm⁻² and demonstrating a low Tafel slope of 67 mV dec⁻¹. Furthermore, no significant performance degradation was observed after 25&#xa0;h of operation at 100&#xa0;mA cm⁻².</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

Green construction of CoNiB₂ nanoflowers towards OER catalyst by interactive coupling the raw oxides via liquid soaking for a few seconds

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月1日

查看全文
  • Ruifeng Qi,
  • Junqi Liu,
  • Xiaohua Qiao,
  • Tianyu Zhang,
  • Qin Liu,
  • Feng Gao,
  • Qingsong Huang

摘要

Developing efficient and stable oxygen evolution reaction (OER) electrocatalysts based on non-precious metals is crucial for cost-effective hydrogen production. Herein, we report the rapid synthesis of crystalline cobalt–nickel boride (CoNiB₂) nanoflowers via a liquid-phase soaking technology (LST). Using liquid boron oxide as the reaction medium enables the synthesis of highly active CoNiB₂ catalysts in just 20 s. CoNiB₂ exhibits a lower energy barrier for the rate-determining step compared to CoB. As a result, the CoNiB₂ catalyst exhibits outstanding OER performance in alkaline media, requiring an overpotential of only 271 mV to achieve 10 mA cm⁻² and demonstrating a low Tafel slope of 67 mV dec⁻¹. Furthermore, no significant performance degradation was observed after 25 h of operation at 100 mA cm⁻².