Hydrogen Oxidation and Evolution Reaction Kinetics on Platinum: Acid vs Alkaline Electrolytes
Massachusetts Institute of Technology · Technical University of Munich · +1 more institution
Abstract
The kinetics of the hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) on polycrystalline platinum [Pt(pc)] and high surface area carbon-supported platinum nanoparticles (Pt/C) were studied in 0.1 M KOH using rotating disk electrode (RDE) measurements. After corrections of noncompensated solution resistance from ac impedance spectroscopy and of hydrogen mass transport in the HOR branch, the kinetic current densities were fitted to the Butler–Volmer equation using a transfer coefficient of α = 0.5 , from which HOR/HER exchange current densities on Pt(pc) and Pt/C were obtained, and the HOR/HER mechanisms in alkaline solution were discussed. Unlike the HOR/HER rates on Pt electrodes in…
Citation impact
- FWCI
- 10.78
- Percentile
- 100%
- References
- 41
Authors
3Topics & keywords
- Exchange current density
- Platinum
- Chemistry
- Hydrogen
- Anode
- Electrolyte
- Rotating disk electrode
- Kinetics