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Mechanistic Analysis of Hydrogen Evolution Reaction on Pt in HClO 4 Using Inverted Rotating Disc Electrode
Author(s) -
Saibi R,
Punathil Meethal Ranjith,
Srinivasan Ramanathan
Publication year - 2020
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060032
Subject(s) - electrode , polarization (electrochemistry) , anode , chemistry , hydrogen , analytical chemistry (journal) , liquid bubble , ion , cathodic protection , mass transfer , chemical physics , inorganic chemistry , bubble , mechanics , physics , chromatography , organic chemistry
An inverted rotating disc electrode (IRDE) setup was fabricated to study the hydrogen evolution reaction (HER) on a Pt electrode. Potentiodynamic polarization studies were conducted in solutions from 5 to 100 mM HClO 4 on Pt at three different rotational speeds. Periodic anodic activation of the electrode yielded repeatable results. At high currents, bubble formation adversely affects current measurement in the rotating disc electrode, but not in IRDE. At large cathodic overpotentials, HER current in IRDE is limited by the mass transfer of H + ions. Simulations show that the polarization results of HER on Pt IRDE are described well by the Volmer Heyrovsky mechanism.