MoS2Effect on Nickel Electrochemical Activation: An Atomistic/Experimental Approach

LOIACONO, ANTONELLA; GOMEZ, MELISA J.; R. NEGREIROS, FÁBIO; OLMOS-ASAR, JIMENA A.; MARISCAL, MARCELO M.; LACCONI, GABRIELA I.; FRANCESCHINI, ESTEBAN A.

JOURNAL OF PHYSICAL CHEMISTRY C

AMER CHEMICAL SOC

Año: 2021 vol. 125 p. 18640 - 18640

1932-7447

ybrid Ni-MoS2 electrocatalysts are one of the most promising materials for the generation of hydrogen in an alkaline medium. This paper presents a simple and economical method for the rational synthesis of Ni-MoS2 nanocomposites, maximizing the contact area and reducing the contact resistance between MoS2 and the nickel surface. In this way, it is possible to maximize the synergistic effect between both materials, obtaining a hybrid nanomaterial with high electroactivity toward the generation of hydrogen. A conventional nickel catalyst (NWts) was compared with the one obtained by dispersing a small amount of MoS2 (0.1425 μg cm-2) over the surface denoted as NMS, and with the same type of catalyst after a 10 s electrodeposition of Ni (NMSN), to have a Ni-MoS2-Ni laminar structure. Thus, the NMSN catalyst shows a current density value of 59% higher than the observed value on the NMS catalyst and 113% higher than that found in the conventional NWts catalyst. Finally, these results w