Gradient Heating Epitaxial Growth Gives Well Lattice-Matched Mo2C-Mo2N Heterointerfaces that Boost Both Electrocatalytic Hydrogen Evolution and Water Vapor Splitting

作者：Zhang, Youzi; Guo, Peng; Guo, Shaohui; Xin, Xu; Wang, Yijin; Huang, Wenjing; Wang, Maohuai; Yang, Bowen; Sobrido, Ana Jorge; Ghasemi, Jahan B.; Yu, Jiaguo; Li, Xuanhua^*

来源：Angewandte Chemie - International Edition, 2022, 61(47).

DOI：10.1002/anie.202209703

• Heterointerfaces
• Hydrogen Evolution
• Lattice-Matched
• Mo2C-Mo2N
• Water Vapor Splitting

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 Mo2C-Mo2N heterostructures using a gradient heating epitaxial growth method. The well lattice-matched heterointerface of Mo2C-Mo2N generates near-zero hydrogen-adsorption free energy and facilitates water dissociation in acid and alkaline media. The lattice-matched Mo2C-Mo2N heterostructures have low overpotentials of 73 mV and 80 mV at 10 mA cm(-2) in acid and alkaline solutions, respectively, comparable to commercial Pt/C. A novel photothermal-electrocatalytic water vapor splitting device using the lattice-matched Mo2C-Mo2N heterostructure as a hydrogen evolution electrocatalyst displays a competitive cell voltage for electrocatalytic water splitting.

• 单位
  西北工业大学; 6; 南阳理工学院