Highly Stable BaZrS3 Chalcogenide Perovskites for Photoelectrochemical Water Oxidation

IF 5.2 3区工程技术 Q2 ENERGY & FUELS Energy & Fuels Pub Date : 2024-11-12 DOI:10.1021/acs.energyfuels.4c0317510.1021/acs.energyfuels.4c03175

Aparajita Das, Jigar Shaileshkumar Halpati, Vidya Raj and Aravind Kumar Chandiran*,

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Abstract

Chalcogenide perovskites have emerged as potential semiconductor materials for optoelectronic devices due to their superior visible light absorption and high thermal and chemical stability. Here, we report BaZrS₃ chalcogenide perovskites-based photoelectrode for photoelectrochemical water splitting (PEC). Experimental findings reveal that BaZrS₃ exhibits excellent stability in harsh pH conditions (pH 3–13) and shows panchromatic absorption with a band gap of 1.77 eV. Temperature-dependent impedance and Raman spectroscopy unveil the presence of polarons and suggest the possibility of polaron-mediated conduction in this material. Under 1 Sun illumination, the PEC device attains a maximum photocurrent density of 0.36 mA/cm² at 0.323 V vs Ag/AgCl at pH 12 (equivalent to 0 V vs RHE), maintaining stability for 30 min. Notably, the photoanode exhibits remarkable stability before and after the photoelectrochemical reaction. BaZrS₃ photoanode displays high surface charge separation efficiency, promoting the surface oxidation reaction.

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用于光电化学水氧化的高稳定性 BaZrS3 Chalcogenide Perovskites

由于具有优异的可见光吸收能力和较高的热稳定性和化学稳定性，掺杂镓镧系元素的过氧化物已成为光电设备的潜在半导体材料。在此，我们报告了基于 BaZrS3 卤化物包晶石的光电电极，用于光电化学分水（PEC）。实验结果表明，BaZrS3 在苛刻的 pH 值条件（pH 值为 3-13）下表现出卓越的稳定性，并显示出 1.77 eV 带隙的全色吸收。与温度相关的阻抗和拉曼光谱揭示了极子的存在，并暗示了极子介导该材料传导的可能性。在 1 Sun 的光照下，PEC 器件在 pH 值为 12 的 0.323 V 对 Ag/AgCl（相当于 0 V 对 RHE）条件下达到 0.36 mA/cm2 的最大光电流密度，并在 30 分钟内保持稳定。值得注意的是，这种光阳极在光电化学反应前后都表现出显著的稳定性。BaZrS3 光阳极显示出很高的表面电荷分离效率，促进了表面氧化反应。

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来源期刊

Energy & Fuels 工程技术-工程：化工

CiteScore

9.20

自引率

13.20%

发文量

1101

审稿时长

2.1 months

期刊介绍： Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.