title: Nitrogen-doped carbon encapsulating γ-MoC/Ni heterostructures for efficient oxygen evolution electrocatalysts.
abstract: Developing efficient and earth-abundant oxygen evolution reaction (OER) electrocatalysts is of great importance in renewable energy research. Herein, we report nitrogen-doped carbon encapsulating γ-MoC/Ni heterostructures (γ-MoC/Ni@NC) for the first time as efficient OER electrocatalysts. The composites can be controlled by the addition of a Mo source to form a nanoparticle-assembled hierarchically porous nanostructure, which can enlarge the specific surface area, thus exposing more active sites. Moreover, we demonstrate that the formation of γ-MoC@Ni heterostructures and the resulting synergistic effect between γ-MoC and Ni can facilitate the reaction kinetics, leading to significantly improved OER activity with an onset overpotential of merely 240 mV, and a low overpotential of 310 mV to afford a current density of 10 mA cm-2. This work provides a new insight into the development of highly active and inexpensive OER electrocatalysts.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P.R. China.
authors.forename: Xueping
authors.initials: X
authors.lastname: Zhang
authors.forename: Liang
authors.initials: L
authors.lastname: Huang
authors.forename: Yujie
authors.initials: Y
authors.lastname: Han
authors.forename: Miao
authors.initials: M
authors.lastname: Xu
authors.forename: Shaojun
authors.initials: S
authors.lastname: Dong