Highly Durable Nanoporous Cu_2-xS Films for Efficient Hydrogen Evolution Electrocatalysis under Mild pH Conditions.

ABSTRACT: Copper-based hydrogen evolution electrocatalysts are promising materials to scale-up hydrogen production due to their reported high current densities; however, electrode durability remains a challenge. Here, we report a facile, cost-effective, and scalable synthetic route to produce Cu_2-xS electrocatalysts, exhibiting hydrogen evolution rates that increase for ∼1 month of operation. Our Cu_2-xS electrodes reach a state-of-the-art performance of ∼400 mA cm^-2 at -1 V vs RHE under mild conditions (pH 8.6), with almost 100% Faradaic efficiency for hydrogen evolution. The rise in current density was found to scale with the electrode electrochemically active surface area. The increased performance of our Cu_2-xS electrodes correlates

SUBMITTER: Fernandez-Climent R 

PROVIDER: S-EPMC10411506 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature