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在Ni-Co活性对中移位电子,以实现高效和强大的尿素电氧化

Chaoyue Xie¹, Changhui Zhou¹, Yan Zhang¹

¹State Key Laboratory of Green Papermaking and Resource Recycling, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, P. R. China.

Angewandte Chemie (International ed. in English)

|February 3, 2026

概括

氧化的补充产生了电子移位的Ni-Co活性对,显著改善了尿素氧化反应 (UOR) 催化. 这一突破使得从尿素和尿液中有效,稳定地生产气,推动了可持续的能源和环境解决方案.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

氧化 (Ni(OH) ₂) 作为尿素氧化反应 (UOR) 催化剂显示出希望.
性能受到Ni^II中的电子定位的限制,阻碍了活性Ni^III物种的形成.
开发高效的催化剂对于可持续能源应用,如生产至关重要.

研究的目的:

在UOR催化中克服Ni () 2的局限性.
增强NiII/NiIII转换并改善催化活性和稳定性.
探索与CoNi合金集成的Co-doped Ni(OH) ₂的潜力,以节能生产气.

主要方法:

通过对Ni (OH) 2进行化,构建电子移位的Ni-Co活性对 (Ni^II+δ-O-Co^II+δ).
化Ni () ₂与CoNi合金的整合.
电化学表征以评估UOR性能和稳定性.

主要成果:

在 10 mA cm-2 时达到 1.288 V 的超低 UOR 电位,优于无毒和其他 Ni-Co 配置.
由于d波段中心向上移动,证明了增强的N端尿素吸附和削弱的N−H键.
在广泛的电流密度范围 (10-500 mA cm-2) 中,表现出2100小时的记录稳定性.

结论:

电子移位的Ni-Co活性对有效地加速了UOR的Ni^II/Ni^III转换.
催化剂设计显著降低了UOR中速率决定步骤的能量障碍.
开发的催化剂提供了一种双重用途的解决方案,用于从尿素/尿液中节能生产气和环境修复.

关键词:

在NiII+δ-O-CoII+δ对中.电子外定位的电子外定位气发电是产生气的过程.尿素氧化的尿素.

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