Exploring the Dominant Role of Atomic- and Nano-Ruthenium as Active Sites for Hydrogen Evolution Reaction in Both Acidic and Alkaline Media

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

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Author(s)

  • Lijie Zhang
  • Haeseong Jang
  • Yan Wang
  • Wei Zhang
  • Min Gyu Kim
  • Dongjiang Yang
  • Shangguo Liu
  • Xien Liu
  • Jaephil Cho

Detail(s)

Original languageEnglish
Article number2004516
Journal / PublicationAdvanced Science
Volume8
Issue number15
Online published4 Jun 2021
Publication statusPublished - 4 Aug 2021
Externally publishedYes

Link(s)

Abstract

Ru nanoparticles (NPs) and single atoms (SAs)-based materials have been investigated as alternative electrocatalysts to Pt/C for hydrogen evolution reaction (HER). Exploring the dominant role of atomic- and nano-ruthenium as active sites in acidic and alkaline media is very necessary for optimizing the performance. Herein, an electrocatalyst containing both Ru SAs and NPs anchored on defective carbon (RuSA+NP/DC) has been synthesized via a Ru–alginate metal–organic supramolecules conversion method. RuSA+NP/DC exhibits low overpotentials of 16.6 and 18.8 mV at 10 mA cm−2 in acidic and alkaline electrolytes, respectively. Notably, its mass activities are dramatically improved, which are about 1.1 and 2.4 times those of Pt/C at an overpotential of 50 mV in acidic and alkaline media, respectively. Theoretical calculations reveal that Ru SAs own the most appropriate H* adsorption strength and thus, plays a dominant role for HER in acid electrolyte, while Ru NPs facilitate the dissociation of H2O that is the rate-determining step in alkaline electrolyte, leading to a remarkable HER activity.

Research Area(s)

Citation Format(s)

Exploring the Dominant Role of Atomic- and Nano-Ruthenium as Active Sites for Hydrogen Evolution Reaction in Both Acidic and Alkaline Media. / Zhang, Lijie; Jang, Haeseong; Wang, Yan; Li, Zijian; Zhang, Wei; Gyu Kim, Min; Yang, Dongjiang; Liu, Shangguo; Liu, Xien; Cho, Jaephil.

In: Advanced Science, Vol. 8, No. 15, 2004516, 04.08.2021.

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