Hydrogen evolution reaction at lead/carbon porous electrodes studied by a novel electrochemical mass spectrometry set-up

MONDINO, TOMÁS M.; GARCÍA, GONZALO; PASTOR, ELENA; FUNGO, FERNANDO; PLANES, GABRIEL A.

ELECTROCHEMISTRY COMMUNICATIONS

ELSEVIER SCIENCE INC

Año: 2022 vol. 143

1388-2481

Lead–acid batteries are robust, low-cost, and have a large power-to-weight ratio. Recently, small amounts of carbon-based materials with a high surface area have been included in the Pb electrode as additives to improve the high-rate partial state of charge. However, carbon-based materials also enhance the hydrogen evolution reaction during the charging process at the negative active material (NAM), which is undesirable and dangerous. Therefore, in the current communication, a promising differential electrochemical mass spectrometry (DEMS) set-up suitable for studying the hydrogen evolution reaction (HER) at technical NAM electrodes in lead–acid batteries (LABs) is reported for the first time.