Journal
CURRENT OPINION IN ELECTROCHEMISTRY
Volume 35, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.coelec.2022.101097
Keywords
Redox-mediated; Electrocatalytic water splitting; Photocatalytic water splitting; Redox mediators
Funding
- National Research Foundation, Prime Minister's Office, Singapore under its Investigatorship Programme [NRF-NRFI2018-06]
- Fundamental Research Funds for the Central Universities, JLU [45122031B004]
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Electrocatalytic and photocatalytic water splitting provide sustainable ways to reduce fossil fuel use and CO2 emissions. Redox-mediated H-2 generation process shows potential in mitigating challenges caused by gas mixing.
Electrocatalytic and photocatalytic water splitting for H-2 production, when driven by renewable energy sources, provide sustainable ways to reduce the use of fossil fuels and CO2 emissions for various applications. However, both encounter various challenges induced by gas mixing due to the simultaneous generation of H-2 and O-2 in the same cell compartment. The redox-mediated H-2 generation process, which employs soluble redox species to serve both as charge carrier through electrolyte solution and electron donor (or acceptor) at the surface of catalyst for decoupled hydrogen evolution reaction, has shown an intriguing potential to mitigate the above issues. This short review briefly introduces the design principle and reaction mechanism of some representative redox-mediated electrocatalytic and photocatalytic water splitting systems in which the recent advancements are highlighted and their potential are evaluated for practical applications.
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