Di Zhao1,2, Kaian Sun1,3,2, Weng‐Chon Cheong1, Lirong Zheng4, Chao Zhang1, Shoujie Liu1, Xing Cao1, Konglin Wu1, Yuan Pan1, Zewen Zhuang1, Botao Hu1, Dingsheng Wang1, Qing Peng1, Chen Chen1, Yadong Li1
1Department of Chemistry, Tsinghua University, Beijing 100084, China
2these authors contributed equally to this work
3State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
4Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Tóm tắt
AbstractFor electrocatalysts for the hydrogen evolution reaction (HER), encapsulating transition metal phosphides (TMPs) into nitrogen‐doped carbon materials has been known as an effective strategy to elevate the activity and stability. Yet still, it remains unclear how the TMPs work synergistically with the N‐doped support, and which N configuration (pyridinic N, pyrrolic N, or graphitic N) contributes predominantly to the synergy. Here we present a HER electrocatalyst (denoted as MoP@NCHSs) comprising MoP nanoparticles encapsulated in N‐doped carbon hollow spheres, which displays excellent activity and stability for HER in alkaline media. Results of experimental investigations and theoretical calculations indicate that the synergy between MoP and the pyridinic N can most effectively promote the HER in alkaline media.
