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在低电压下维持甲醇氧化和进化,通过在对称的基于Pt的电极对上应用周期性极性逆转

Botao Zhu^1,2, Jie Xiong², Shuo Wu²

¹Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, China.

Angewandte Chemie (International ed. in English)

|February 5, 2026

概括

用于甲醇氧化的白金电催化剂面临CO中毒. 本研究介绍了Pt@NiM-LDH催化剂和极性逆转,以实现持续,高效的酸盐和的生产.

科学领域:

电触媒溶解是一种电触媒.
材料科学材料科学材料科学
可持续化学可持续化学

背景情况:

基于的电催化剂促进甲醇氧化反应 (MOR),以低电位产生酸盐.
二氧化碳中毒严重限制了这些催化剂的可持续性,特别是在高电流密度下.

研究的目的:

开发耐氧化碳Pt电催化剂,以提高甲醇氧化和合电解中的可持续性.
研究支持材料和操作策略在缓解CO中毒方面的协同效应.

主要方法:

合成Pt@NiM-LDH (M = Co, Mn, Cu, Fe) 电催化剂,通过将Pt固定在NiM层的双氧化物 (LDH) 支上.
对称的Pt@NiCo-LDH电极对的电化学测试,具有周期电流极性逆转.
实验和理论研究 (包括DFT) 以阐明CO耐受性和性能提升的机制.

主要成果:

Pt@NiM-LDH催化剂通过Pt-O-Ni结合减轻了CO中毒.
定期电流的极性逆转大大减轻了Pt@NiCo-LDH系统中的CO中毒.
在300 mA cm-2和1.02 V下,在120多个小时内持续同时生产和酸盐,具有~200%的联合法拉第效率.
尼科-LDH支持电子调节Pt位,抑制CO的形成和吸附.
极性逆转通过电气双层重建来削弱CO吸附.

结论:

开发的Pt@NiM-LDH电催化剂,特别是具有极性逆转的Pt@NiCo-LDH,为合甲醇氧化和演化反应提供了高效和耐碳的解决方案.
这一战略显著提高了基于Pt的电催化剂的可持续性,为工业应用铺平了道路.
催化剂设计和操作参数之间的协同效应对于克服电催化过程中的局限性至关重要.

关键词:

电池电压电池电压电池电压格式格式格式的生产生产的生产.甲醇电氧化过程中的甲醇电氧化.周期性的极性逆转.

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