Carbon nanobowls supported ultrafine iridium nanocrystals : An active and stable electrocatalyst for the oxygen evolution reaction in acidic media

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

View graph of relations

Author(s)

  • Qi Xue
  • Jingyi Zhu
  • Ruili Peng
  • Qiaozhen Xu
  • Pei Chen
  • Yu Chen

Detail(s)

Original languageEnglish
Pages (from-to)325-331
Journal / PublicationJournal of Colloid and Interface Science
Volume529
Early online date7 Jun 2018
StatePublished - 1 Nov 2018

Abstract

Highly efficient proton exchange membrane electrolyzer in acidic media is of great importance for the hydrogen production from the electrochemical water splitting. Unfortunately, the electrochemical water splitting is limited by the slow oxygen evolution reaction kinetics at anode. So far, the synthesis of active and stable electrocatalysts in acid media is still a challenging work. In the work, carbon nanobowls supported ultrafine iridium nanocrystals are synthesized by a simple complexation-reduction method with assistance of 1-hydroxyethane-1, 1-diphosphonic acid, which effectively serves as as complexant, capping agent and surfactant during the synthesis. The good dispersion and ultrafine size of Ir nanocrystals, the modified interfacial property from phosphonate with excellent hydrophilicity, as well as carbon nanobowls as advanced carbon supports contribute to their excellent electrocatalytic activity for the oxygen evolution reaction in acid media. The as-prepared carbon nanobowls supported ultrafine iridium nanocrystals present an ultra-low overpotential of 290 mV to achieve the mass activity of 1000 A g−1 and a small Tafel slope of 49.1 mV dec−1, which significantly outperform commercial Ir/C electrocatalyst. The remarkable activity and durability make carbon nanobowls supported ultrafine iridium nanocrystals as a potential candidate for the oxygen evolution reaction electrocatalyst in proton exchange membrane water electrolyzer.

Research Area(s)

  • Carbon nanobowls, Complexation-reduction synthesis, Electrochemical water splitting, Iridium nanocrystals, Oxygen evolution reaction

Citation Format(s)

Carbon nanobowls supported ultrafine iridium nanocrystals : An active and stable electrocatalyst for the oxygen evolution reaction in acidic media. / Xue, Qi; Gao, Wei; Zhu, Jingyi; Peng, Ruili; Xu, Qiaozhen; Chen, Pei; Chen, Yu.

In: Journal of Colloid and Interface Science, Vol. 529, 01.11.2018, p. 325-331.

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