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Investigating the presence of adsorbed species on Pt steps at low potentials

Author

Listed:
  • Rubén Rizo

    (Universidad de Alicante)

  • Julia Fernández-Vidal

    (University of Liverpool)

  • Laurence J. Hardwick

    (University of Liverpool)

  • Gary A. Attard

    (University of Liverpool)

  • Francisco J. Vidal-Iglesias

    (Universidad de Alicante)

  • Victor Climent

    (Universidad de Alicante)

  • Enrique Herrero

    (Universidad de Alicante)

  • Juan M. Feliu

    (Universidad de Alicante)

Abstract

The study of the OH adsorption process on Pt single crystals is of paramount importance since this adsorbed species is considered the main intermediate in many electrochemical reactions of interest, in particular, those oxidation reactions that require a source of oxygen. So far, it is frequently assumed that the OH adsorption on Pt only takes place at potentials higher than 0.55 V (versus the reversible hydrogen electrode), regardless of the Pt surface structure. However, by CO displacement experiments, alternating current voltammetry, and Raman spectroscopy, we demonstrate here that OH is adsorbed at more negative potentials on the low coordinated Pt atoms, the Pt steps. This finding opens a new door in the mechanistic study of many relevant electrochemical reactions, leading to a better understanding that, ultimately, can be essential to reach the final goal of obtaining improved catalysts for electrochemical applications of technological interest.

Suggested Citation

  • Rubén Rizo & Julia Fernández-Vidal & Laurence J. Hardwick & Gary A. Attard & Francisco J. Vidal-Iglesias & Victor Climent & Enrique Herrero & Juan M. Feliu, 2022. "Investigating the presence of adsorbed species on Pt steps at low potentials," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30241-7
    DOI: 10.1038/s41467-022-30241-7
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    References listed on IDEAS

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    1. Jin-Chao Dong & Xia-Guang Zhang & Valentín Briega-Martos & Xi Jin & Ji Yang & Shu Chen & Zhi-Lin Yang & De-Yin Wu & Juan Miguel Feliu & Christopher T. Williams & Zhong-Qun Tian & Jian-Feng Li, 2019. "In situ Raman spectroscopic evidence for oxygen reduction reaction intermediates at platinum single-crystal surfaces," Nature Energy, Nature, vol. 4(1), pages 60-67, January.
    2. Yi-Fan Huang & Patricia J. Kooyman & Marc T. M. Koper, 2016. "Intermediate stages of electrochemical oxidation of single-crystalline platinum revealed by in situ Raman spectroscopy," Nature Communications, Nature, vol. 7(1), pages 1-7, November.
    3. Ian T. McCrum & Marc T. M. Koper, 2020. "The role of adsorbed hydroxide in hydrogen evolution reaction kinetics on modified platinum," Nature Energy, Nature, vol. 5(11), pages 891-899, November.
    4. Jian Feng Li & Yi Fan Huang & Yong Ding & Zhi Lin Yang & Song Bo Li & Xiao Shun Zhou & Feng Ru Fan & Wei Zhang & Zhi You Zhou & De Yin Wu & Bin Ren & Zhong Lin Wang & Zhong Qun Tian, 2010. "Shell-isolated nanoparticle-enhanced Raman spectroscopy," Nature, Nature, vol. 464(7287), pages 392-395, March.
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