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| Home > Articles > Published articles > Low-Cost, High-Yield Zinc Oxide-Based Nanostars for Alkaline Overall Water Splitting |
| Home > Articles > Published articles > Low-Cost, High-Yield Zinc Oxide-Based Nanostars for Alkaline Overall Water Splitting |
(Institut Català de Nanociència i Nanotecnologia) (Institució Catalana de Recerca i Estudis Avançats) (Università degli Studi di Catania. Dipartimento di Fisica e Astronomia "Ettore Majorana") (Università degli Studi di Catania. Dipartimento di Fisica e Astronomia "Ettore Majorana") (Università degli Studi di Catania. Dipartimento di Fisica e Astronomia "Ettore Majorana") (Università degli Studi di Catania. Dipartimento di Fisica e Astronomia "Ettore Majorana")
| Date: | 2023 |
| Abstract: | The investigation of high-efficiency and sustainable electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media is critical for renewable energy technologies. Here, we report a low-cost and high-yield method to obtain ZnOHF-ZnO-based 2D nanostars (NSs) by means of chemical bath deposition (CBD). The obtained NSs, cast onto graphene paper substrates, were used as active materials for the development of a full water splitting cell. For the HER, NSs were decorated with an ultralow amount of Pt nanoparticles (11. 2 μg cm -2), demonstrating an overpotential of 181 mV at a current density of 10 mA cm -2. The intrinsic activity of Pt was optimized, thanks to the ZnO supporting nanostructures, as outlined by the mass activity of Pt (0. 9 mA mg -1) and its turnover frequency (0. 27 s -1 for a Pt loading of 11. 2 μg cm -2). For the OER, bare NSs showed a remarkable result of 355 mV at 10 mA cm -2 in alkaline media. Pt-decorated and bare NSs were used as the cathode and anode, respectively, for alkaline electrochemical water splitting, assessing a stable overpotential of 1. 7 V at a current density of 10 mA cm -2. The reported data pave the way toward large-scale production of low-cost electrocatalysts for green hydrogen production. |
| Grants: | European Commission 654360 Agencia Estatal de Investigación PID2020- 116093RB-C43 Agencia Estatal de Investigación CEX2021-001214-S Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00457 |
| Rights: | 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.  |
| Language: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Published in: | ACS omega, Vol. 8, Issue 40 (October 2023) , p. 37023-37031, ISSN 2470-1343 |
