Low-temperature direct electrochemical splitting of H2S

Martin Velazquez-Rizo, Adrian Cesar Cavazos Sepulveda

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Hydrogen is considered one of the most promising decarbonized fuels. However, its applicability is limited due to the ecological constraints of its production. Hydrogen sulfide (H2S) is widely available in oil and gas reservoirs and has the potential of becoming an energetically favorable source of hydrogen. Nevertheless, its electrochemical separation into H2 and elemental sulfur has not been successfully achieved at the industrial scale, due to sulfur poisoning of the electrodes at the sulfur oxidation half-reaction. This review highlights the progress of the direct electrolytic separation of H2S below the sulfur dew point, where the sulfur poisoning effect becomes more prominent. The article discusses the different technologies and approaches explored to improve the energy efficiency and stability of H2S electrolytic systems, including the recent use of nanostructured electrodes and novel sulfur solvents as electrolytes.
Original languageEnglish (US)
JournalFrontiers in Chemical Engineering
StatePublished - Jan 5 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-05-03
Acknowledgements: This research was internally funded by Saudi Aramco.


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