title: Core-Shell-Structured Tungsten Carbide Encapsulated within Nitrogen-Doped Carbon Spheres for Enhanced Hydrogen Evolution.
abstract: It is highly desirable and remains a great challenge to develop alternative hydrogen evolution reaction (HER) electrocatalysts that are low-cost, highly efficient, and exhibit excellent stability. In this work, we report the synthesis of tungsten carbide nanocrystallites encapsulated within nitrogen-doped carbon (TCNC) spheres through in situ polymerization of dopamine with metatungstate followed by carburization under an inert atmosphere. During the in situ and confined carburization process, very small tungsten carbide nanocrystallites are obtained and uniformly dispersed in the simultaneously generated carbon matrix. Benefited from the unique structure and morphology, the resultant TCNC spheres exhibit high electrocatalytic activity and excellent stability toward HER in both acidic and alkaline solutions.
authors: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China), University of Chinese Academy of Sciences, Beijing, 100049 (P. R. China.
authors: Lei
authors: L
authors: Han
authors: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China), University of Chinese Academy of Sciences, Beijing, 100049 (P. R. China.
authors: Miao
authors: M
authors: Xu
authors: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China), University of Chinese Academy of Sciences, Beijing, 100049 (P. R. China.
authors: Yujie
authors: Y
authors: Han
authors: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China), University of Chinese Academy of Sciences, Beijing, 100049 (P. R. China.
authors: You
authors: Y
authors: Yu
authors: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, P. R. China), University of Chinese Academy of Sciences, Beijing, 100049 (P. R. China. dongsj@ciac.jl.cn.
authors: Shaojun
authors: S
authors: Dong
mesh_terms: D002244:Carbon / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D009584:Nitrogen / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017973:Tungsten Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017973:Tungsten Compounds; C002802:tungsten carbide; D002244:Carbon; D006859:Hydrogen; D009584:Nitrogen
keywords: core-shell; electrocatalyst; hydrogen evolution; nitrogen-doped carbon spheres; tungsten carbide