Evaluating Hydrogen Evolution and Oxidation in Alkaline Media to Establish Baselines

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Abstract

This paper fills a significant gap in the literature for alkaline hydrogen evolution (HER) and oxidation (HOR) baseline performance, while reviewing the different variables that influence observed properties. Although high-performing HER-HOR catalysts in acidic electrolytes are too active to measure kinetic in rotating disk electrode (RDE) half-cells, under alkaline conditions RDE kinetics evaluations are relevant and half-cell performances are comparable to hydrogen pump data. This paper focuses on best practices to ensure that half-cell tests don't unnecessarily lower platinum group metal (PGM) performance or improve non-PGM performance. Specific aspects examined include experiments on PGMs minimizing the impact of impurities (electrolyte, cell material) and experiments on non-PGMs minimizing the impact from test protocols (counter electrode).

Original languageAmerican English
Pages (from-to)F441-F455
JournalJournal of the Electrochemical Society
Volume165
Issue number7
DOIs
StatePublished - 2018

Bibliographical note

Publisher Copyright:
© The Author(s) 2018.

NREL Publication Number

  • NREL/JA-5900-71361

Keywords

  • electrocatalysis
  • electrolysis
  • fuel cells

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