Ru atom-modified Co4N-CoF2 heterojunction catalyst for high-performance alkaline hydrogen evolution

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

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Author(s)

  • Shizheng Zhou
  • Haeseong Jang
  • Qing Qin
  • Min Gyu Kim
  • Xuqiang Ji
  • Xien Liu
  • Jaephil Cho

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number128865
Journal / PublicationChemical Engineering Journal
Volume414
Online published11 Feb 2021
Publication statusPublished - 15 Jun 2021

Abstract

D-band-center control engineering, particularly combining both cation and anion intercalations towards heterostructure formation with simultaneous usage of Ru, N as well as F species, for optimal electronic structure as efficient hydrogen evolution reaction (HER) catalysts remains a daunting challenge but critical for renewable-energy technologies. Herein, we lay emphasis on the design of active-site electronic structure based on d-band-center shift through the construction of Co4N-CoF2 heterostructure coupled with Ru doping (Ru/Co4N-CoF2). Solvothermal coordination reaction followed by annealing course causes cooccurrence of F, N, Ru in Co neighborhood. As-obtained Ru/Co4N-CoF2 exhibits superior HER activity in alkaline electrolyte with overpotential as low as 53 mV to yield a current density of 10 mA cm−2 which is close to that of commercial Pt/C, outperforming many transition-metal-based catalysts recent-reported. Moreover, it still presents good durability with continuous operation of 22 h in 1.0 M KOH. Such excellent performance is ascribed to appropriate electron structure of Ru/Co4N-CoF2 for optimized hydrogen binding abilities on Co/Ru sites as confirmed by synchrotron-based X-ray adsorption near-edge structure and X-ray photoelectron spectroscopies. This study not only establishes highly active electrocatalysts by impacting d-band center of active sites but also provides valuable insights into the synergistic-effect protocol of doping and heterostructure strategies for d-band-center shifting.

Research Area(s)

  • Cobalt fluorides, D-band-center, Electrocatalysts, Heterostructure, Hydrogen evolution reaction

Citation Format(s)

Ru atom-modified Co4N-CoF2 heterojunction catalyst for high-performance alkaline hydrogen evolution. / Zhou, Shizheng; Jang, Haeseong; Qin, Qing; Li, Zijian; Gyu Kim, Min; Ji, Xuqiang; Liu, Xien; Cho, Jaephil.

In: Chemical Engineering Journal, Vol. 414, 128865, 15.06.2021.

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