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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >The rise of hematite: origin and strategies to reduce the high onset potential for the oxygen evolution reaction
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The rise of hematite: origin and strategies to reduce the high onset potential for the oxygen evolution reaction

机译：赤铁矿的崛起：减少高放氧潜力的起源和策略

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摘要

Hematite (alpha-Fe2O3) has emerged as a promising material for photoelectrochemical (PEC) water splitting thanks to its abundance, stability in an aqueous environment, favorable optical bandgap and position of the electronic valence band. Nevertheless, its performance as a photoanode is considerably lower than what is theoretically achievable. In particular, the high electrochemical potential usually needed to initiate water oxidation is detrimental to the prospect of using hematite for practical devices. In this review we elucidate the appealing, as well as the challenging, aspects of using hematite for PEC water splitting and focus on the recent efforts towards lowering the onset potential of water oxidation. We examine and rationalize several strategies pursued to achieve this goal involving manipulation of the hematite/electrolyte interface, as well as improving relevant properties of hematite itself.
机译：赤铁矿（α-Fe2O3）由于其丰度，在水性环境中的稳定性，良好的光学带隙和电子价带的位置而成为一种有前景的光电化学（PEC）水分解材料。然而，其作为光电阳极的性能大大低于理论上可达到的水平。特别地，引发水氧化通常需要的高电化学势不利于将赤铁矿用于实际装置的前景。在这篇综述中，我们阐明了使用赤铁矿进行PEC水分解的吸引力和挑战性，并着眼于近期为降低水氧化的潜在爆发而做出的努力。我们检查并合理化了为实现这一目标而采取的几种策略，其中涉及对赤铁矿/电解质界面的操纵以及改善赤铁矿本身的相关性能。

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