Lin Jinghuang, Wang Pengcheng, Wang Haohan, Li Chun, Si Xiaoqing, Qi Junlei, Cao Jian, Zhong Zhengxiang, Fei Weidong, Feng Jicai
State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin 150001 China.
School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China.
Adv Sci (Weinh). 2019 May 20;6(14):1900246. doi: 10.1002/advs.201900246. eCollection 2019 Jul 17.
Designing and constructing bifunctional electrocatalysts is vital for water splitting. Particularly, the rational interface engineering can effectively modify the active sites and promote the electronic transfer, leading to the improved splitting efficiency. Herein, free-standing and defect-rich heterogeneous MoS/NiS nanosheets for overall water splitting are designed. The abundant heterogeneous interfaces in MoS/NiS can not only provide rich electroactive sites but also facilitate the electron transfer, which further cooperate synergistically toward electrocatalytic reactions. Consequently, the optimal MoS/NiS nanosheets show the enhanced electrocatalytic performances as bifunctional electrocatalysts for overall water splitting. This study may open up a new route for rationally constructing heterogeneous interfaces to maximize their electrochemical performances, which may help to accelerate the development of nonprecious electrocatalysts for overall water splitting.
设计和构建双功能电催化剂对于水分解至关重要。特别是，合理的界面工程可以有效地修饰活性位点并促进电子转移，从而提高分解效率。在此，设计了用于全水分解的自支撑且富含缺陷的异质MoS/NiS纳米片。MoS/NiS中丰富的异质界面不仅可以提供丰富的电活性位点，还能促进电子转移，这进一步协同促进电催化反应。因此，最佳的MoS/NiS纳米片作为全水分解的双功能电催化剂表现出增强的电催化性能。这项研究可能为合理构建异质界面以最大化其电化学性能开辟一条新途径，这可能有助于加速用于全水分解的非贵金属电催化剂的开发。
