具有低析氧电位的新型稳定CoO-SnO异质结电催化剂

Novel Stable CoO-SnO Heterojunction Electrocatalysts with Low Oxygen Evolution Potential.

作者信息

Yan Bingfeng, Liu Wen, Sun Youchen, Gao Meng, Chen Aqing, Zhang Jun

机构信息

New Energy Materials Research Center, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.

出版信息

Materials (Basel). 2025 Apr 19;18(8):1869. doi: 10.3390/ma18081869.

DOI:10.3390/ma18081869

PMID:40333560

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12028880/

Abstract

Proton exchange membrane (PEM) water electrolysis offers a sustainable route for hydrogen production, yet the reliance on costly noble metal-based anodes hinders scalability. Tin dioxide (SnO) emerges as a promising alternative due to its acid stability, but its high oxygen evolution potential (OEP) limits practical application in hydrogen production via water electrolysis. Here, we address this challenge by incorporating cobalt (Co) into SnO to create a heterojunction electrocatalyst. The optimized CoO-SnO heterojunction catalyst with a tin-to-cobalt mass ratio of 3:1 exhibits a significantly reduced OEP (1.6 V vs. RHE) and an overpotential of 186 mV at 10 mA cm in acidic media, outperforming undoped SnO. Stability tests reveal a lifespan exceeding 24 h at 100 mA cm, a threefold improvement over pure SnO. This work underscores the potential of the CoO-SnO heterojunction electrocatalyst as a cost-effective, durable anode catalyst for PEM electrolyzers.

摘要

质子交换膜（PEM）水电解为制氢提供了一条可持续的途径，然而对成本高昂的贵金属基阳极的依赖阻碍了其规模化发展。二氧化锡（SnO）因其酸稳定性而成为一种有前景的替代材料，但其高析氧电位（OEP）限制了其在水电解制氢中的实际应用。在此，我们通过将钴（Co）掺入SnO中来创建异质结电催化剂，以应对这一挑战。锡钴质量比为3:1的优化CoO-SnO异质结催化剂在酸性介质中表现出显著降低的析氧电位（相对于可逆氢电极，OEP为1.6 V），在10 mA cm时过电位为186 mV，性能优于未掺杂的SnO。稳定性测试表明，在100 mA cm时寿命超过24小时，比纯SnO提高了两倍。这项工作强调了CoO-SnO异质结电催化剂作为PEM电解槽具有成本效益、耐用的阳极催化剂的潜力。