Synergistic Effect of Electronic Particle-Support Interactions on the Ir-Based Multiheterostructure for Acidic Water Oxidation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

10 Scopus Citations
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Author(s)

  • Liqiang Hou
  • Haeseong Jang
  • Huihui Liu
  • Min Gyu Kim
  • Qing Qin
  • Xien Liu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)15950-15957
Journal / PublicationACS Sustainable Chemistry and Engineering
Volume10
Issue number48
Online published17 Nov 2022
Publication statusPublished - 5 Dec 2022

Abstract

Exploiting durable electrocatalysts with high specific activity for acidic water oxidation is a great challenge due to the high energy barrier for the multiple oxygen evolution reaction (OER) intermediates. Deliberately taking advantage of the synergistic effect of electronic particle-support interactions on both the particle and support may address this concern. Here, we deliberately design a multiheterostructure with an IrO2 shell-coated Ir core anchored on the Co3O4 framework as an efficient acidic OER electrocatalyst. Detailed characterizations (depth-resolved XPS, XANES, and EXAFS) of the electrocatalysts demonstrate that the electronic particle-support interactions lead to a unique electron transfer at the interface from IrO2 and Co3O4 to Ir. Such an electron transfer will result in compressed Ir-O bonds and Co-O bonds, thus simultaneously reducing free energies for OER intermediates on the surfaces of both IrO2 and Co3O4, sufficiently stimulating the synergistic effect to enhance OER activity and stability.

Research Area(s)

  • acidic water oxidation, electronic particle-support interactions, multiheterostructure, specific mass activity, synergistic effect

Citation Format(s)

Synergistic Effect of Electronic Particle-Support Interactions on the Ir-Based Multiheterostructure for Acidic Water Oxidation. / Hou, Liqiang; Jang, Haeseong; Liu, Huihui et al.
In: ACS Sustainable Chemistry and Engineering, Vol. 10, No. 48, 05.12.2022, p. 15950-15957.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review