The synergistic effect of Hf-O-Ru bonds and oxygen vacancies in Ru/HfO2 for enhanced hydrogen evolution

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

99 Scopus Citations
View graph of relations

Author(s)

  • Guangkai Li
  • Haeseong Jang
  • Shangguo Liu
  • Min Gyu Kim
  • Qing Qin
  • Xien Liu
  • Jaephil Cho

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number1270
Journal / PublicationNature Communications
Volume13
Online published11 Mar 2022
Publication statusPublished - 2022

Link(s)

Abstract

Ru nanoparticles have been demonstrated to be highly active electrocatalysts for the hydrogen evolution reaction (HER). At present, most of Ru nanoparticles-based HER electrocatalysts with high activity are supported by heteroatom-doped carbon substrates. Few metal oxides with large band gap (more than 5 eV) as the substrates of Ru nanoparticles are employed for the HER. By using large band gap metal oxides substrates, we can distinguish the contribution of Ru nanoparticles from the substrates. Here, a highly efficient Ru/HfO2 composite is developed by tuning numbers of Ru-O-Hf bonds and oxygen vacancies, resulting in a 20-fold enhancement in mass activity over commercial Pt/C in an alkaline medium. Density functional theory (DFT) calculations reveal that strong metal-support interaction via Ru-O-Hf bonds and the oxygen vacancies in the supported Ru samples synergistically lower the energy barrier for water dissociation to improve catalytic activities.

Research Area(s)

Citation Format(s)

The synergistic effect of Hf-O-Ru bonds and oxygen vacancies in Ru/HfO2 for enhanced hydrogen evolution. / Li, Guangkai; Jang, Haeseong; Liu, Shangguo et al.
In: Nature Communications, Vol. 13, 1270, 2022.

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

Download Statistics

No data available