When less is more: Enhancement of green hydrogen production and efficiency by using electrodes with ultra-low platinum loadings
Sulfur dioxide depolarized electrolysis (sde) is a promising technology for cost-effective green hydrogen production that can be used for the storage of intermittent renewable energies used to power the electrolyzer. The obtained hydrogen can be stored and used as a source for producing electricity...
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2024 |
| País: | España |
| Recursos: | Universidad de Castilla-La Mancha |
| Repositório: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/38523 |
| Acesso em linha: | https://doi.org/10.1016/j.jpowsour.2024.234513 https://hdl.handle.net/10578/38523 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Efficiency Electrospray Energy conversion Green hydrogen Sulfur depolarized electrolysis |
| Resumo: | Sulfur dioxide depolarized electrolysis (sde) is a promising technology for cost-effective green hydrogen production that can be used for the storage of intermittent renewable energies used to power the electrolyzer. The obtained hydrogen can be stored and used as a source for producing electricity in a fuel cell. However, high platinum loadings (around 2 mgpt cm-2) in the anode and cathode electrodes significantly contribute to the overall cost of the electrolyzer. This study aimed to optimize both electrodes using the electrospray technique for the deposition of ultra-low pt loadings. The electrodes achieved a total platinum loading as low as 0.4 mgpt cm-2 (0.3 mgpt cm-2 for the anode and 0.1 mgpt cm-2 for the cathode), an 80 % reduction compared to common platinum loadings. This reduction not only increased the hydrogen production rate (18 ml min-1 with optimized electrodes vs. 4.7 ml min-1 with non-optimized electrodes) but also decreased the production of hydrogen sulfide in the cathode, resulting in a hydrogen stream with higher purity. Overall, this study demonstrates the potential of electrospray for achieving low platinum loadings and improving the efficiency of sde for green hydrogen production. |
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