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Optimizing Electrocatalytic Hydrogen Evolution Stability via Minimal Bubble Adhesion at Electrodeposited Crack-Structured NiPx Catalysts

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Energy & Environmental Materials 2024年第5期7卷 248-258页

作者： Qian Sun Xiaoyu Hao Dina Zhang Tianyi Zhang Yuanfang Zhao Xiaolei Huang Xuqing Liu State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials Northwestern Polytechnical University College of Art and Design Shenzhen University Institute of Material and Chemistry Ganjiang Innovation Academy Chinese Academy of Sciences Shandong Laboratory of Yantai Advanced Materials and Green Manufacture

In response to the ongoing energy crisis, advancing the field of electrocatalytic water splitting is of utmost significance, necessitating the urgent development of high-performance, cost-effective, and durable hydrogen evolution reaction catalysts. But the generated gas bubble adherence to the electrode surface and sluggish separation contribute to significant energy loss, primarily due to the insufficient exposure of active sites, thus substantially hindering electrochemical performance. Here, we successfully developed a superaerophobic catalytic electrode by loading phosphorus-doped nickel metal （NiPx） onto various conductive substrates via an electrodeposition method. The electrode exhibits a unique surface structure, characterized by prominent surface fissures, which not only exposes additional active sites but also endows the electrode with superaerophobic properties. The NiPx/Ti electrode demonstrates superior electrocatalytic activity for hydrogen evolution reaction, significantly outperforming a platinum plate, displaying an overpotential of mere 216 mV to achieve a current density of-500 mA cm-2in 1 M KOH. Furthermore,the NiPx/Ti electrode manifests outstanding durability and robustness during continuous electrolysis, maintaining stability at a current density of-10 mA cm-2over a duration of 2000 h. Owing to the straightforward and scalable preparation methods, this highly efficient and stable NiPx/Ti electrocatalyst offers a novel strategy for the development of industrial water electrolysis.

关键词： electrocatalyst gas bubble adhesion hydrogen evolution reaction long-term durability superaerophobic surface

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