Highly active and stable amorphous IrOx/CeO2 nanowires for acidic oxygen evolution

Wangyan Gou, Zhaoming Xia, Xiaohe Tan, Qingyu Xue, Fan Ye, Sheng Dai, Mingkai Zhang, Rui Si, Yong Zou, Yuanyuan Ma, Johnny C. Ho, Yongquan Qu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Development of highly active and durable electrocatalysts for acidic oxygen evolution reaction (OER) remains an unresolved grand challenge. Here, we reported the amorphous IrOx/CeO2 nanowires as highly active and acid-stable OER catalysts through a facile electro-spinning/calcination approach. The amorphous catalysts delivered a high mass activity of 167 A gIr−1 at 1.51 V, a low overpotential of 220 mV at 10 mA cm−2, and a stable performance for 300 h of continuous operation in acid. As revealed by complementary experimental and theoretical calculation results, the intimate nanoscale feature of IrOx/CeO2 creates abundant binary interfaces, at which CeO2 as an electron buffer regulates the adsorption of oxygen intermediates, lowers the activation barrier of OER, and suppresses the over-oxidation and dissolution of Ir, thereby significantly enhancing the OER activity and stability. This work provides a new strategy for designing highly active and acid-resistant OER catalysts.

Original languageEnglish
Article number107960
JournalNano Energy
Publication statusPublished - Dec 15 2022
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering


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