Engineering surface states of hematite based photoanodes for boosting photoelectrochemical water splitting
Tang, PengYi (Institut Català de Nanociència i Nanotecnologia)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)

Fecha:	2019
Resumen:	Hematite-based photoanodes are promising candidates for photoelectrochemical water splitting. However, the performance of pristine hematite semiconductors is unsatisfactory due to charge recombination occurring at different interfaces: Back contact, bulk and semiconductor/electrolyte interfaces. Increasing efforts have been focused on enhancing the performance of hematite based photoanodes via nanostructure control, doping, heterojunction construction, and surface modification with a secondary semiconductor or an oxygen evolution electrocatalyst. Most of the previous studies attributed the enhanced PEC water splitting performance to the changes in the donor density via doping, the formation of type II heterojunction via a secondary semiconductor coating and the improved water oxidation kinetics via coating oxygen evolution electrocatalysts. However, the role of surface states presented at the semiconductor/electrolyte interfaces of hematite-based photoanodes has been overlooked in previous investigations, which virtually play a critical role in determining the photoelectrochemical water oxidation process. In this review, we summarize the recent progress of various techniques employed for the detection of surface states of hematite photoanodes and highlight the important role of modifying surface states in the development of high performance hematite based photoanodes for photoelectrochemical water splitting application. The challenges and future prospects in the study of hematite based photoanodes are also discussed.
Ayudas:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327 Ministerio de Economía y Competitividad SEV-2017-0706 Ministerio de Economía y Competitividad ENE2017-85087-C3
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió sotmesa a revisió
Materia:	Charge recombinations ; Engineering surfaces ; Future prospects ; Nano-structure control ; Photoelectrochemical water oxidation ; Photoelectrochemical water splitting ; Semiconductor/electrolyte interfaces ; Type II hetero junctions
Publicado en:	Nanoscale horizons, Vol. 4, Issue 6 (November 2019) , p. 1256-1276, ISSN 2055-6764

DOI: 10.1039/c9nh00368a

Preprint 33 p, 2.2 MB

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Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Institut Català de Nanociència i Nanotecnologia (ICN2)
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