Scholarlink

<p>The electrocatalytic nitrate reduction reaction to ammonia (NO<sub>3</sub>RR) can reduce pollution and conserve energy, but current catalyst activity still fails to meet production requirements, primarily due to insufficient atomic hydrogen (H*) supply and slow hydrogenation of oxynitride intermediates. This work leverages the strong nitrate adsorption capability of cuprous oxide (Cu<sub>2</sub>O) and interfacial coupling between NiCo layered double hydroxides (NiCo-LDH) and Cu<sub>2</sub>O to fabricate a nanocomposite catalyst (NiCo-LDH/Cu<sub>2</sub>O) via a facile hydrothermal method. By adjusting the metal ratio to modulate proton absorption behavior, the NiCo-LDH/Cu<sub>2</sub>O catalyst can achieve high ammonia yield (0.382 mmol h<sup>−1</sup> cm<sup>−2</sup>) and desired Faraday efficiency (80.4%). The experimental results demonstrate that the interfacial coupling interaction between NiCo-LDH and Cu<sub>2</sub>O induces optimal electronic effects, and then promotes the adsorption and activation of reaction intermediates, as well as optimizes the reaction pathway, and significantly enhances the electrochemical ammonia synthesis performance. Our constructed NiCo-LDH/Cu<sub>2</sub>O catalysis system provides a feasible strategy for the development of efficient and cost-effective NO<sub>3</sub>RR applications.</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

Interface coupling induced electronic effect of NiCo-LDH/Cu2O heterojunction catalysts towards efficient electrochemical nitrate reduction to ammonia

  • 期刊论文

  • 发表日期：

    2025年6月27日

查看全文
  • Lei Li,
  • Qiuhan Cao,
  • Xiaoyi Dong,
  • Xin Yu,
  • Hu Yao,
  • Shiqi Zeng,
  • Xiaohui Guo

摘要

The electrocatalytic nitrate reduction reaction to ammonia (NO3RR) can reduce pollution and conserve energy, but current catalyst activity still fails to meet production requirements, primarily due to insufficient atomic hydrogen (H*) supply and slow hydrogenation of oxynitride intermediates. This work leverages the strong nitrate adsorption capability of cuprous oxide (Cu2O) and interfacial coupling between NiCo layered double hydroxides (NiCo-LDH) and Cu2O to fabricate a nanocomposite catalyst (NiCo-LDH/Cu2O) via a facile hydrothermal method. By adjusting the metal ratio to modulate proton absorption behavior, the NiCo-LDH/Cu2O catalyst can achieve high ammonia yield (0.382 mmol h−1 cm−2) and desired Faraday efficiency (80.4%). The experimental results demonstrate that the interfacial coupling interaction between NiCo-LDH and Cu2O induces optimal electronic effects, and then promotes the adsorption and activation of reaction intermediates, as well as optimizes the reaction pathway, and significantly enhances the electrochemical ammonia synthesis performance. Our constructed NiCo-LDH/Cu2O catalysis system provides a feasible strategy for the development of efficient and cost-effective NO3RR applications.