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Dynamic active-site generation of atomic iridium stabilized on nanoporous metal phosphides for water oxidation

Author

Listed:
  • Kang Jiang

    (Hunan University)

  • Min Luo

    (Shanghai Polytechnic University)

  • Ming Peng

    (Hunan University)

  • Yaqian Yu

    (Hunan University)

  • Ying-Rui Lu

    (National Synchrotron Radiation Research Center)

  • Ting-Shan Chan

    (National Synchrotron Radiation Research Center)

  • Pan Liu

    (Shanghai Jiao Tong University)

  • Frank M. F. Groot

    (Utrecht University, Universiteitsweg 99)

  • Yongwen Tan

    (Hunan University)

Abstract

Designing efficient single-atom catalysts (SACs) for oxygen evolution reaction (OER) is critical for water-splitting. However, the self-reconstruction of isolated active sites during OER not only influences the catalytic activity, but also limits the understanding of structure-property relationships. Here, we utilize a self-reconstruction strategy to prepare a SAC with isolated iridium anchored on oxyhydroxides, which exhibits high catalytic OER performance with low overpotential and small Tafel slope, superior to the IrO2. Operando X-ray absorption spectroscopy studies in combination with theory calculations indicate that the isolated iridium sites undergo a deprotonation process to form the multiple active sites during OER, promoting the O–O coupling. The isolated iridium sites are revealed to remain dispersed due to the support effect during OER. This work not only affords the rational design strategy of OER SACs at the atomic scale, but also provides the fundamental insights of the operando OER mechanism for highly active OER SACs.

Suggested Citation

  • Kang Jiang & Min Luo & Ming Peng & Yaqian Yu & Ying-Rui Lu & Ting-Shan Chan & Pan Liu & Frank M. F. Groot & Yongwen Tan, 2020. "Dynamic active-site generation of atomic iridium stabilized on nanoporous metal phosphides for water oxidation," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16558-1
    DOI: 10.1038/s41467-020-16558-1
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    Cited by:

    1. Siliu Lyu & Chenxi Guo & Jianing Wang & Zhongjian Li & Bin Yang & Lecheng Lei & Liping Wang & Jianping Xiao & Tao Zhang & Yang Hou, 2022. "Exceptional catalytic activity of oxygen evolution reaction via two-dimensional graphene multilayer confined metal-organic frameworks," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Dongpeng Zhang & Yanxiao Li & Pengfei Wang & Jinyong Qu & Yi Li & Sihui Zhan, 2023. "Dynamic active-site induced by host-guest interactions boost the Fenton-like reaction for organic wastewater treatment," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Mengyun Hou & Lirong Zheng & Di Zhao & Xin Tan & Wuyi Feng & Jiantao Fu & Tianxin Wei & Minhua Cao & Jiatao Zhang & Chen Chen, 2024. "Microenvironment reconstitution of highly active Ni single atoms on oxygen-incorporated Mo2C for water splitting," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    4. Sang Eon Jun & Youn-Hye Kim & Jaehyun Kim & Woo Seok Cheon & Sungkyun Choi & Jinwook Yang & Hoonkee Park & Hyungsoo Lee & Sun Hwa Park & Ki Chang Kwon & Jooho Moon & Soo-Hyun Kim & Ho Won Jang, 2023. "Atomically dispersed iridium catalysts on silicon photoanode for efficient photoelectrochemical water splitting," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    5. Xinxuan Duan & Qihao Sha & Pengsong Li & Tianshui Li & Guotao Yang & Wei Liu & Ende Yu & Daojin Zhou & Jinjie Fang & Wenxing Chen & Yizhen Chen & Lirong Zheng & Jiangwen Liao & Zeyu Wang & Yaping Li &, 2024. "Dynamic chloride ion adsorption on single iridium atom boosts seawater oxidation catalysis," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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