Efficient photocatalytic H2O2 production and green oxidation of glycerol over a SrCoO3-incorporated catalyst

Applied Catalysis B: Environment and Energy Pub Date : 2024-09-06 DOI:10.1016/j.apcatb.2024.124565

Yuxuan He, Yongming Wang, Jin Qian, Kailin Xu, Bianhe Lu, Sijing Tang, Yin Liu, Junwei Shen

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Abstract

Photocatalysis for HO production suffers from low carrier utilization and slow reaction kinetics. Herein, a photocatalytic system supported by a SrCoO-MoS (SCOS) heterojunction, which possessed a unique S-O electron transport channel, was proposed to facilitate HO production under condition where glycerol served as a sacrificial agent. The SCOS heterojunction achieved a remarkable yield of 15.90 mmol g h HO production, 3.7 times higher than the base component SCO. The construction of the heterojunction enriched the oxygen vacancies on the catalyst surface, facilitated photogenerated charge separation, and promoted the adsorption of O, reducing the oxygen reduction reaction (ORR) energy barrier. Besides, glycerol served as a unique proton donor, efficiently captured holes to enhance HO production, and generated valuable by-products including glyceric acid and dihydroxyacetone. Furthermore, SCOS exhibited excellent stability over repeated cycles with consistent HO yields. This study offers an efficient photocatalytic system and demonstrates glycerol’s potential in green oxidation processes.

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在掺入钴酸锶的催化剂上高效光催化生产 H2O2 和绿色氧化甘油

光催化生产 HO 存在载流子利用率低和反应动力学缓慢的问题。本文提出了一种由 SrCoO-MoS （SCOS）异质结支持的光催化系统，该异质结具有独特的 S-O 电子传输通道，可在甘油作为牺牲剂的条件下促进 HO 的产生。SCOS 异质结的 HO 产率高达 15.90 mmol g h，是基本成分 SCO 产率的 3.7 倍。异质结的构建丰富了催化剂表面的氧空位，促进了光生电荷分离，促进了 O 的吸附，降低了氧还原反应（ORR）的能垒。此外，甘油还是一种独特的质子供体，能有效捕获空穴以提高 HO 的生成，并产生包括甘油酸和二羟基丙酮在内的有价值的副产物。此外，SCOS 在反复循环中表现出卓越的稳定性，并能持续产生 HO。这项研究提供了一种高效的光催化系统，并证明了甘油在绿色氧化过程中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Applied Catalysis B: Environment and Energy

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