Femtosecond Laser-Ablated Copper Surface as a Substrate for a MoS₂-Based Hydrogen Evolution Reaction Electrocatalyst.

ABSTRACT: One of the methods to improve the performance of a heterogeneous electrocatalyst is the dispersion of a catalytic material on a suitable substrate. In this study, femtosecond laser ablation was used to prepare very rough but also ordered copper surfaces consisting of vertical, parallel ridges. Then, a molybdenum sulfide coating was electrochemically deposited onto these surfaces. It was observed by profilometry that the average roughness of the surface after coating with MoS₂ had decreased, but the developed surface area still remained significantly larger than the projected surface area. The electrodes were then used as an electrocatalyst for the hydrogen evolution reaction in acidic media. These were highly efficient, reaching 10 mA cm^-2 of HER current at a -181 mV

SUBMITTER: Levinas R 

PROVIDER: S-EPMC9182345 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature