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Stoerzinger KA, Favaro M, Ross PN, et al. Probing the Surface of Platinum during the Hydrogen Evolution Reaction in Alkaline Electrolyte. J Phys Chem B. 2017;122(2):864-870doi: 10.1021/acs.jpcb.7b06953.
Stoerzinger, K. A., Favaro, M., Ross, P. N., Yano, J., Liu, Z., Hussain, Z., & Crumlin, E. J. (2018). Probing the Surface of Platinum during the Hydrogen Evolution Reaction in Alkaline Electrolyte. The journal of physical chemistry. B, 122(2), 864-870. https://doi.org/10.1021/acs.jpcb.7b06953
Stoerzinger, Kelsey A, et al. "Probing the Surface of Platinum during the Hydrogen Evolution Reaction in Alkaline Electrolyte." The journal of physical chemistry. B vol. 122,2 (2018): 864-870. doi: https://doi.org/10.1021/acs.jpcb.7b06953
Stoerzinger KA, Favaro M, Ross PN, Yano J, Liu Z, Hussain Z, Crumlin EJ. Probing the Surface of Platinum during the Hydrogen Evolution Reaction in Alkaline Electrolyte. J Phys Chem B. 2018 Jan 18;122(2):864-870. doi: 10.1021/acs.jpcb.7b06953. Epub 2017 Dec 06. PMID: 29166014.
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J Phys Chem B. 2018 Jan 18;122(2):864-870. doi: 10.1021/acs.jpcb.7b06953. Epub 2017 Dec 06.

Probing the Surface of Platinum during the Hydrogen Evolution Reaction in Alkaline Electrolyte.

The journal of physical chemistry. B

Kelsey A Stoerzinger, Marco Favaro, Philip N Ross, Junko Yano, Zhi Liu, Zahid Hussain, Ethan J Crumlin

Affiliations

  1. Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory , Richland, Washington 99352, United States.
  2. Advanced Light Source, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States.
  3. Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States.
  4. Chemical Sciences Division, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States.
  5. Materials Sciences Division, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States.
  6. Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States.
  7. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences , Shanghai 200050, People's Republic of China.
  8. Division of Condensed Matter Physics and Photon Science, School of Physical Science and Technology, ShanghaiTech University , Shanghai 200031, China.
  9. Joint Center for Energy Storage Research, Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, California 94720, United States.

PMID: 29166014 DOI: 10.1021/acs.jpcb.7b06953

Abstract

Understanding the surface chemistry of electrocatalysts in operando can bring insight into the reaction mechanism, and ultimately the design of more efficient materials for sustainable energy storage and conversion. Recent progress in synchrotron based X-ray spectroscopies for in operando characterization allows us to probe the solid/liquid interface directly while applying an external potential, applied here to the model system of Pt in alkaline electrolyte for the hydrogen evolution reaction (HER). We employ ambient pressure X-ray photoelectron spectroscopy (AP-XPS) to identify the oxidation and reduction of Pt-oxides and hydroxides on the surface as a function of applied potential, and further assess the potential for hydrogen adsorption and absorption (hydride formation) during and after the HER. This new window into the surface chemistry of Pt in alkaline electrolyte brings insight into the nature of the rate limiting step, the extent of H ad/absorption, and its persistence at more anodic potentials.

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