Journal
SOLAR RRL
Volume 5, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.202000412
Keywords
carrier dynamics; photoanodes; photoelectrochemical water splitting; 2D metal oxides; sulfides
Funding
- National Natural Science Foundation of China [52072254, 51872191, 51772197]
- 333 High-level Talents Cultivation Project of Jiangsu Province
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [17KJA430013]
- Six Talents Peak Project of Jiangsu Province
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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The utilization of solar energy through photoelectrochemical water splitting is a promising strategy to address energy crisis and environmental issues. 2D nanostructured metal oxides/sulfides have been widely used in PEC cells as photoanodes due to their unique features. Various strategies to optimize the PEC performance of 2D metal oxides/sulfides photoanodes, such as structure engineering and element doping, are summarized in this article. Exciting advances and future research directions for designing highly efficient 2D photoanodes are also provided.
The utilization of solar energy plays a vital role in relieving energy crisis and associated environmental problems. Photoelectrochemical (PEC) water splitting, which can directly transform solar energy into clean hydrogen energy, is one of the most promising strategies to utilize solar energy. 2D nanostructured metal oxides/sulfides have been widely applied as photoanodes in PEC cells due to their unique configuration and features, which can efficiently improve light absorption, enlarge electrode/electrolyte contacting interfaces, and promote carrier transfer and injection. This article begins with the introduction of performance parameters, carrier dynamics measurement, and mechanism exploration techniques for photoanodes, which is followed by an overview of research progress in using 2D nanostructure metal oxides/sulfides to fabricate efficient photoanodes for PEC water splitting. Subsequently, the recent representative strategies to optimize the PEC performance of 2D metal oxides/sulfides photoanodes, including structure engineering, defect engineering, element doping, heterojunction construction, and surface modification, are summarized. Finally, the exciting advances and future research directions for designing highly efficient 2D photoanodes are provided.
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