Interfacial sp C-O-Mo Hybridization Originated High-Current Density Hydrogen Evolution

作者：Yao, Yuan; Zhu, Yuhua; Pan, Chuanqi; Wang, Chenyang; Hu, Siyu; Xiao, Wen; Chi, Xiao; Fang, Yarong; Yang, Ji; Deng, Hongtao; Xiao, Shengqiang; Li, Junbo; Luo, Zhu^*; Guo, Yanbing^*

来源：Journal of the American Chemical Society, 2021, 143(23): 8720-8730.

DOI：10.1021/jacs.1c02831

• EFFICIENT HYDROGEN
• CARRIER MOBILITY
• GRAPHDIYNE
• PERFORMANCE
• GRAPHENE
• NANOSHEETS
• ELECTROCATALYSTS
• COMPOSITE
• CATALYSTS
• ALKALINE

High-current density (>= 1 A cm(-2)) is a critical factor for large-scale industrial application of water-splitting electro-catalysts, especially seawater-splitting. However, it still remains a great challenge to reach high-current density due to the lack of active and stable intrinsic catalytic active sites in catalysts. Herein, we report an original three-dimensional self-supporting graphdiyne/molybdenum oxide (GDY/MoO3) material for efficient hydrogen evolution reaction via a rational design of "sp C-O-Mo hybridization" on the interface. The "sp C-O-Mo hybridization" creates new intrinsic catalytic active sites (nonoxygen vacancy sites) and increases the amount of active sites (eight times higher than pure MoO3). The "sp C-O-Mo hybridization" facilitates charge transfer and boosts the dissociation process of H2O molecules, leading to outstanding HER activity with high-current density (>1.2 A cm(-2)) in alkaline electrolyte and a decent activity and stability in natural seawater. Our results show that high-current density electrocatalysts can be achieved by interfacial chemical bond engineering, three-dimensional structure design, and hydrophilicity optimization.

• 单位
  武汉工程大学; 5; 武汉理工大学