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Pàgina inicial > Articles > Articles publicats > Highly Durable Nanoporous CuS Films for Efficient Hydrogen Evolution Electrocatalysis under Mild pH Conditions |
Data: | 2023 |
Resum: | 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 CuS electrocatalysts, exhibiting hydrogen evolution rates that increase for ∼1 month of operation. Our CuS 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 CuS electrodes correlates with a decrease in the Tafel slope, while analyses by X-ray photoemission spectroscopy, operando X-ray diffraction, and in situ spectroelectrochemistry cooperatively revealed the Cu-centered nature of the catalytically active species. These results allowed us to increase fundamental understanding of heterogeneous electrocatalyst transformation and consequent structure-activity relationship. This facile synthesis of highly durable and efficient CuS electrocatalysts enables the development of competitive electrodes for hydrogen evolution under mild pH conditions. |
Ajuts: | Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00457 Agencia Estatal de Investigación RED2022-134508-T Agencia Estatal de Investigación RYC-2017-21931 Agencia Estatal de Investigación PID2020-116093RB-C44 Agencia Estatal de Investigación PID2020-116093RB-C43 Agencia Estatal de Investigación PID2020-116093RB-C41 Agencia Estatal de Investigación EUR2020-112066 Agencia Estatal de Investigación CEX2021-001214-S Agencia Estatal de Investigación TED2021-129999A-C33 |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Green hydrogen ; Hydrogen evolution reaction ; Electrocatalysis ; Cu-based electrodes ; Operando ECSA increase ; Mechanistic analysis |
Publicat a: | ACS catalysis, Vol. 13, Issue 15 (July 2023) , p. 10457-10467, ISSN 2155-5435 |
11 p, 4.0 MB |