分解水
赤铁矿
可再生能源
材料科学
光电流
带隙
吸收(声学)
光电化学电池
太阳能
纳米技术
光催化
光电子学
化学
电气工程
电解质
催化作用
冶金
工程类
物理化学
复合材料
生物化学
电极
作者
Pankaj Sharma,Ji‐Wook Jang,Jin Ho Lee
出处
期刊:Chemcatchem
[Wiley]
日期:2018-12-05
卷期号:11 (1): 157-179
被引量:125
标识
DOI:10.1002/cctc.201801187
摘要
Abstract 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‐Fe 2 O 3 ) 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‐Fe 2 O 3 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‐Fe 2 O 3 as a viable photocatalyst for PEC water splitting, one needs to rectify these unfavorable characteristics of α‐Fe 2 O 3 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.
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