State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin (China).
University of the Chinese Academy of Sciences, Beijing 100049 (China).
Angew Chem Int Ed Engl. 2015 Aug 3;54(32):9351-5. doi: 10.1002/anie.201503407. Epub 2015 Jul 1.
Active and stable electrocatalysts made from earth-abundant elements are key to water splitting for hydrogen production through electrolysis. The growth of NiSe nanowire film on nickel foam (NiSe/NF) in situ by hydrothermal treatment of NF using NaHSe as Se source is presented. When used as a 3D oxygen evolution electrode, the NiSe/NF exhibits high activity with an overpotential of 270 mV required to achieve 20 mA cm(-2) and strong durability in 1.0 M KOH, and the NiOOH species formed at the NiSe surface serves as the actual catalytic site. The system is also highly efficient for catalyzing the hydrogen evolution reaction in basic media. This bifunctional electrode enables a high-performance alkaline water electrolyzer with 10 mA cm(-2) at a cell voltage of 1.63 V.
由丰富元素制成的活性和稳定的电催化剂是通过电解水制氢的关键。本文通过水热法在镍泡沫（NF）上原位生长 NiSe 纳米线薄膜，使用 NaHSe 作为硒源。当用作 3D 析氧电极时，NiSe/NF 表现出高活性，在 1.0 M KOH 中达到 20 mA cm(-2) 需要 270 mV 的过电势，并且具有很强的耐久性，在 NiSe 表面形成的 NiOOH 物种作为实际催化位点。该体系在碱性介质中也能高效地催化析氢反应。这种双功能电极能够实现高性能的碱性水电解槽，在 1.63 V 的电池电压下达到 10 mA cm(-2) 的电流密度。
