Study of the hydrogen evolution reaction on Ag-LaCO3OH based ceramic electrode in alkaline medium
By Rubio-Saavedra, D.; Peña-Méndez, Y.; Gómez, I.; Gamboa, S. A.
Published in Materials Today: Proceedings
2021
Abstract
In this work is investigated the hydrogen evolution reaction on Ag-LaCO3OH based ceramic electrode in an alkaline medium. The ceramic material was prepared by partial auto-decomposition of lanthanum carbonate. The structural characterization based on XRD and FTIR confirmed the existence of a crystalline phase of LaCO3OH. During the hydrogen evolution reaction, the Ni-mesh/Ag/LaCO3OH electrode showed similar electrocatalytic characteristics than Ni-mesh. The hydrogen production in the ceramic electrode was 80.87% of the product obtained by the Ni-mesh electrode. The electrochemical results showed that Ag-LaCO3OH promotes the first electron transfer at the lowest overpotential. The crystalline (002) plane of LaCO3OH and the La-Ag interface could contribute to the electrode electrochemical response. The Volmer-Heyrovsky mechanism is appropriate to describe the hydrogen evolution reaction at the ceramic electrode.