A step forward: hydrogen production on cobalt molybdenum sulfide electrocatalyst in anion exchange membrane water electrolyzer

Carlos V. M. Inocêncio (1) , Frederic Fouda-Onana (2) , Julie Rousseau (1) , Nadia Guignard (1) , Teko Napporn (1) , Cláudia Morais (1) , Boniface Kokoh (1)

1 IC2MP [Poitiers] - Institut de chimie des milieux et matériaux de Poitiers [UMR 7285]
2 DEHT - Département de l'électricité et de l'hydrogène pour les transports

Cobalt molybdenum sulfide (Co$_{0.5}$Mo$_{0.5}$S$_x$) was evaluated, as an alternative cathode catalyst for hydrogen large scale production in an anion exchange membrane water electrolyzer (AEMWE). Performance testing in a Co$_{0.5}$Mo$_{0.5}$S$_x$//Ir single cell fed with 0.1 mol/L$^{-1}$ KOH exhibited the best activity reported to date for transition metal sulfide cathodes in alkaline media. The aforementioned cell presented good stability during 40 h of operation at 2 V; in addition, it has most of its current density degradation recovered in the beginning of the subsequent 10 h interval.

Mots clés: anion exchange membrane; hydrogen production; transition metal sulfides; surface analysis

Domaines: Matériaux

Carlos V. M. Inocêncio, Frederic Fouda-Onana, Julie Rousseau, Nadia Guignard, Teko Napporn, et al.. A step forward: hydrogen production on cobalt molybdenum sulfide electrocatalyst in anion exchange membrane water electrolyzer. ACS Applied Energy Materials, 2022, 5 (9), pp.10396-10401. ⟨10.1021/acsaem.2c02270⟩. ⟨cea-03822512⟩