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首页> 外文期刊>Journal of Materials Science and Chemical Engineering >Enhancement of Oxygen Evolution Activity of Ruddlesden-Popper-Type Strontium Ferrite by Stabilizing Fe4+
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Enhancement of Oxygen Evolution Activity of Ruddlesden-Popper-Type Strontium Ferrite by Stabilizing Fe4+

机译：通过稳定Fe4 +增强Ruddlesden-Pop型锶铁氧体的析氧活性

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摘要

Development of active iron based water oxidation for designing an ideal artificial photosynthesis devices operating under benign neutral pH is highly demanded. We investigated the electrocatalytic activity of Ruddlesden-Pop-per-type strontium ferrite (Sr3Fe2O7) toward the oxygen evolution reaction (OER). Owing to the temperature-dependent efficiency of the charge disproportionation of Fe4+, the OER activity of Sr3Fe2O7 varied with the temperature, and the onset potential for the OER at a neutral pH underwent a negative shift of approximately 200 mV by increasing the temperature for the stabilization of Fe4+. When metal substitution was made to Sr3Fe2O7 for stabilizing Fe4+ at room temperature, the temperature dependence of the OER activity disappeared and the OER was driven at a small overpotential without increasing the temperature, indicating that the stabilization of Fe4+ is substantially important for achieving high OER activity.
机译：迫切需要开发用于设计理想的在良性中性pH下运行的人工光合作用装置的铁基水氧化活性剂。我们研究了Ruddlesden-Pop-per型锶铁氧体（Sr3Fe2O7）对氧释放反应（OER）的电催化活性。由于Fe4 +电荷歧化的温度依赖性效率，Sr3Fe2O7的OER活性随温度而变化，中性pH下OER的起始电位通过增加稳定温度而经历了约200 mV的负移。 Fe4 +。当在室温下对Sr3Fe2O7进行金属取代以稳定Fe4 +时，OER活性的温度依赖性消失，并且OER在较小的过电位下驱动而不升高温度，这表明Fe4 +的稳定化对于实现高OER活性至关重要。 。

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