How to Reliably Report the Overpotential of an Electrocatalyst

By Siqi Niu, Siwei Li, Yunchen Du, Xi-jiang Han, Ping Xu. 2020

363 citations recorded by the source corpus.

The potential was referred to RHE by calibrating the reference electrode with Pt foil (Aldrich) as both the working and the counter electrodes in a sealed standard three-electrode. Saturate the electrolyte with high-purity hydrogen for at least half an hour before performing electrode calibration. Cyclic voltammograms (CV) were performed at the scan rate of 1 mV/s and the average of the two inter-conversion point values was taken to be the thermodynamic potential for the hydrogen evolution reaction. To investigate the influence of temperature on the correction values of the electrodes, a thermostatic water bath was used to precisely control the temperature of the electrolyte at 20, 25 and 30 oC, respectively.

Subfields: Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/14439ed9c3ab1405fc39509fa86d9552ab36dc67