Zhang Youzi, Guo Peng, Guo Shaohui, Xin Xu, Wang Yijin, Huang Wenjing, Wang Maohuai, Yang Bowen, Jorge Sobrido Ana, Ghasemi Jahan B, Yu Jiaguo, Li Xuanhua
State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China.
College of Chemistry, Taiyuan University of Technology, Taiyuan, 030024, China.
Angew Chem Int Ed Engl. 2022 Nov 21;61(47):e202209703. doi: 10.1002/anie.202209703. Epub 2022 Oct 25.
An optimized approach to producing lattice-matched heterointerfaces for electrocatalytic hydrogen evolution has not yet been reported. Herein, we present the synthesis of lattice-matched Mo C-Mo N heterostructures using a gradient heating epitaxial growth method. The well lattice-matched heterointerface of Mo C-Mo N generates near-zero hydrogen-adsorption free energy and facilitates water dissociation in acid and alkaline media. The lattice-matched Mo C-Mo N heterostructures have low overpotentials of 73 mV and 80 mV at 10 mA cm in acid and alkaline solutions, respectively, comparable to commercial Pt/C. A novel photothermal-electrocatalytic water vapor splitting device using the lattice-matched Mo C-Mo N heterostructure as a hydrogen evolution electrocatalyst displays a competitive cell voltage for electrocatalytic water splitting.
尚未有关于制备用于电催化析氢的晶格匹配异质界面的优化方法的报道。在此，我们展示了使用梯度加热外延生长法合成晶格匹配的MoC-MoN异质结构。MoC-MoN良好的晶格匹配异质界面产生接近零的氢吸附自由能，并促进在酸性和碱性介质中的水分解。晶格匹配的MoC-MoN异质结构在酸性和碱性溶液中，在10 mA cm时的过电位分别低至73 mV和80 mV，与商业Pt/C相当。一种使用晶格匹配的MoC-MoN异质结构作为析氢电催化剂的新型光热-电催化水蒸气分解装置在电催化水分解方面显示出具有竞争力的电池电压。
