Nie Jiahuan, Jiang Qiao, Sang Zhiyuan, Zheng Min, Li Zhenxin, Liu Wei, Yang De'an, Zheng Yao, Yin Lichang, Hou Feng, Yan Xiao, Liang Ji
Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education School of Materials Science and Engineering, Tianjin University, Tianjin, China.
School of Materials Science and Engineering, Peking University, Beijing, China.
Nat Commun. 2025 Jul 1;16(1):5895. doi: 10.1038/s41467-025-60950-8.
Ampere-level hydrogen peroxide (HO) electrosynthesis in brine and seawater via two-electron oxygen reduction reaction (2e ORR) is promising, but limited by the slow water dissociation and insufficient protons in neutral media. Hence, we design a multifunctional Ni(OH) nanoplates anchored on carbon nanotubes (CNTs) as 2e ORR catalyst towards HO electrosynthesis, where Ni(OH) nanoplates accelerate water dissociation and proton transfer, resolving the critical proton shortage for HO formation. Combined with exceptional chloride tolerance and suppressed hydrogen evolution, the catalyst achieves a high HO yield of 141 mol g h (14.1 mmol cm h) at 1 A cm and a long operation time over 150 h at 200 mA cm in 1 M NaCl solution with >80% HO selectivity. In natural seawater, it achieves a Faraday efficiency over 70% at 100 mA cm. This work enables water purification/disinfection via simultaneous HO/active chlorine production, bridging electrosynthesis with environmental remediation.
通过双电子氧还原反应（2e ORR）在盐水和海水中进行安培级过氧化氢（HO）电合成很有前景，但受中性介质中缓慢的水离解和质子不足的限制。因此，我们设计了一种锚定在碳纳米管（CNT）上的多功能Ni(OH)纳米片作为用于HO电合成的2e ORR催化剂，其中Ni(OH)纳米片加速水离解和质子转移，解决了HO形成中关键的质子短缺问题。结合出色的耐氯化物性能和抑制析氢，该催化剂在1 A cm下实现了141 mol g h（14.1 mmol cm h）的高HO产率，并在1 M NaCl溶液中以200 mA cm的电流密度下运行超过150小时，HO选择性>80%。在天然海水中，在100 mA cm下其法拉第效率超过70%。这项工作通过同时产生HO/活性氯实现了水净化/消毒，将电合成与环境修复联系起来。
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