Electrochemical oxidation of size-selected pt nanoparticles studied using in situ high-energy-resolution X-ray absorption spectroscopy

Lindsay R. Merte, Farzad Behafarid, Daniel J. Miller, Daniel Friebel, Sangwan Cho, Felix Mbuga, Dimosthenis Sokaras, Roberto Alonso-Mori, Tsu Chien Weng, Dennis Nordlund, Anders Nilsson, Beatriz Roldan Cuenya

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Abstract

High-energy-resolution fluorescence-detected X-ray absorption spectroscopy (HERFD-XAS) has been applied to study the chemical state of ∼1.2 nm size-selected Pt nanoparticles (NPs) in an electrochemical environment under potential control. Spectral features due to chemisorbed hydrogen, chemisorbed O/OH, and platinum oxides can be distinguished with increasing potential. Pt electro-oxidation follows two competitive pathways involving both oxide formation and Pt dissolution.

Original languageEnglish
Pages (from-to)2371-2376
Number of pages6
JournalACS Catalysis
Volume2
Issue number11
DOIs
Publication statusPublished - 2012 Nov 2

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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    Merte, L. R., Behafarid, F., Miller, D. J., Friebel, D., Cho, S., Mbuga, F., Sokaras, D., Alonso-Mori, R., Weng, T. C., Nordlund, D., Nilsson, A., & Roldan Cuenya, B. (2012). Electrochemical oxidation of size-selected pt nanoparticles studied using in situ high-energy-resolution X-ray absorption spectroscopy. ACS Catalysis, 2(11), 2371-2376. https://doi.org/10.1021/cs300494f