Solvent-free microwave synthesis of ultra-small Ru-Mo2C@CNT with strong metal-support interaction for industrial hydrogen evolution
Xueke Wu, Zuochao Wang, Dan Zhang, Yingnan Qin, Minghui Wang, Yi Han, Tianrong Zhan, Bo Yang, Shaoxiang Li, Jianping Lai, Lei Wang
Abstract
Abstract Exploring a simple, fast, solvent-free synthetic method for large-scale preparation of cheap, highly active electrocatalysts for industrial hydrogen evolution reaction is one of the most promising work today. In this work, a simple, fast and solvent-free microwave pyrolysis method is used to synthesize ultra-small (3.5 nm) Ru-Mo 2 C@CNT catalyst with heterogeneous structure and strong metal-support interaction in one step. The Ru-Mo 2 C@CNT catalyst only exhibits an overpotential of 15 mV at a current density of 10 mA cm −2 , and exhibits a large turnover frequency value up to 21.9 s −1 under an overpotential of 100 mV in 1.0 M KOH. In addition, this catalyst can reach high current densities of 500 mA cm −2 and 1000 mA cm −2 at low overpotentials of 56 mV and 78 mV respectively, and it displays high stability of 1000 h. This work provides a feasible way for the reasonable design of other large-scale production catalysts.