Encapsulating Co2P@C Core-Shell Nanoparticles in a Porous Carbon Sandwich as Dual-Doped Electrocatalyst for Hydrogen Evolution

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yuanyuan Yang
  • Feng Li
  • Shuwen Li
  • Xinzhe Li
  • Siu-Pang Ng
  • Rong Li

Detail(s)

Original languageEnglish
Pages (from-to)376-388
Journal / PublicationChemSusChem
Volume11
Issue number2
Online published9 Jan 2018
Publication statusPublished - 23 Jan 2018

Abstract

A highly efficient and pH-universal hydrogen evolution reaction (HER) electrocatalyst with a sandwich-architecture constructed using zero-dimensional N- and P-dual-doped core–shell Co2P@C nanoparticles embedded into a 3 D porous carbon sandwich (Co2P@N,P-C/CG) was synthesized through a facile two-step hydrothermal carbonization and pyrolysis method. The interfacial electron transfer rate and the number of active sites increased owing to the synergistic effect between the N,P-dual-doped Co2P@C core–shell and sandwich-nanostructured substrates. The presence of a high surface area and large pore sizes improved the mass-transfer dynamics. This nanohybrid showed remarkable electrocatalytic activity toward the HER in a wide pH range with good stability. The computational study and experiments revealed that the carbon atoms close to the N and P dopants on the shell of Co2P@N,P-C were effective active sites for HER catalysis and that both Co2P and the N,P dopants gave rise to an optimized binding free energy of H on the active sites.

Research Area(s)

  • core–shell structure, density functional theory, dicobalt phosphide, hydrogen evolution reaction, porous carbon

Citation Format(s)

Encapsulating Co2P@C Core-Shell Nanoparticles in a Porous Carbon Sandwich as Dual-Doped Electrocatalyst for Hydrogen Evolution. / Yang, Yuanyuan; Liang , Xiongyi; Li, Feng; Li, Shuwen; Li, Xinzhe; Ng, Siu-Pang; Wu, Chi-Man Lawrence ; Li, Rong.

In: ChemSusChem, Vol. 11, No. 2, 23.01.2018, p. 376-388.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review