Xue Yurui, Zuo Zicheng, Li Yongjun, Liu Huibiao, Li Yuliang
Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Organic Solids, Institute of Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Small. 2017 Aug;13(31). doi: 10.1002/smll.201700936. Epub 2017 Jun 14.
The oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and overall water splitting are major energy and chemical conversion efforts. Progress in electrocatalytic reactions have shown that the future is limitless in many fields. However, it is urgent to develop efficient electrocatalysts. Here, the first graphdiyne-supported efficient and bifunctional electrocatalyst is reported using 3D graphdiyne foam as scaffolds, and NiCo S nanowires as building blocks (NiCo S NW/GDF). NiCo S NW/GDF exhibits outstanding catalytic activity and stability toward both OER and HER, as well as overall water splitting in alkaline media. Remarkably, it enables a high-performance alkaline water electrolyzer with 10 and 20 mA cm at very low cell voltages of 1.53 and 1.56 V, respectively, and remarkable stability over 140 h of continuous electrolysis operation at 20 mA cm . The results indicate that this catalyst has a bifunction that overcomes all reported bifunctional, nonprecious-metal-based ones.
析氧反应（OER）、析氢反应（HER）以及全水解反应是主要的能量和化学转化过程。电催化反应的进展表明，未来在许多领域都有着无限可能。然而，开发高效的电催化剂迫在眉睫。在此，报道了首例以3D石墨炔泡沫为支架、NiCo S纳米线为结构单元的石墨炔负载高效双功能电催化剂（NiCo S NW/GDF）。NiCo S NW/GDF在碱性介质中对OER和HER以及全水解反应均表现出出色的催化活性和稳定性。值得注意的是，它能在分别仅为1.53 V和1.56 V的极低电池电压下实现电流密度为10和20 mA cm的高性能碱性水电解槽，并且在20 mA cm的电流密度下连续电解运行140 h仍具有出色的稳定性。结果表明，这种催化剂具有一种双功能特性，超越了所有已报道的基于非贵金属的双功能催化剂。
