Key strategies to advance the photoelectrochemical water splitting performance of α‐Fe2O3 photoanode

Sharma, Pankaj ORCID: https://orcid.org/0000-0003-2319-260X, Jang, Ji-Wook and Lee, Jae Sung 2019. Key strategies to advance the photoelectrochemical water splitting performance of α‐Fe2O3 photoanode. ChemCatChem 11 (1) , pp. 157-179. 10.1002/cctc.201801187

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Abstract

Surface morphing photo catalyst: This review provides insight into the modification strategies adopted and advancements made in surface, morphology, and system of α-Fe2O3 photoanode for the improvement of PEC water oxidation efficiency. It also highlights technical barriers of α-Fe2O3 photoanode that limit the extraction of its full potential, but have to be overcome for practical application in solar hydrogen production system. The last few decades’ extensive research on the photoelectrochemical (PEC) water splitting has projected it as a promising approach to meet the steadily growing demand for cleaner and renewable energy in a sustainable and economically viable fashion. Among many potential photocatalysts, hematite (α-Fe2O3) emerges as a highly promising photoanode material with favorable characteristics including visible light absorption (a suitable band gap energy), earth abundance, chemical stability, and low cost. A pronounced disadvantage of α-Fe2O3 is its low photovoltage together with an extremely short hole diffusion length and a low electrical conductivity, which limit its PEC water oxidation performance. To make α-Fe2O3 as a viable photocatalyst for PEC water splitting, one needs to rectify these unfavorable characteristics of α-Fe2O3 by elaborated multiple modifications. In this review article, we introduce various modification strategies of hematite with emphasis on surface modifications to achieve low onset potential as well as high photocurrent approaching the theoretical value for solar water splitting.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	Wiley
ISSN:	1867-3880
Last Modified:	15 Nov 2022 12:15
URI:	https://orca.cardiff.ac.uk/id/eprint/153550

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