Ga-SrTiO3 modified by CuCrOx/Co3O4 dual cocatalyst for efficient photocatalytic overall water splitting

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-05-25 DOI:10.1016/j.apcata.2025.120373

Yiquan Zhan , Shaohui Lai , Junzhe Jiang , Lijiao Zhong , Yongsheng Liu , Kai Yang , Jinbiao Liu , Shiyong Liu , Liqing Li , Yoshihisa Sakata

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Abstract

Strontium titanate (SrTiO₃) holds great potential for photocatalytic overall water splitting (OWS) to produce hydrogen. However, the current SrTiO₃-based photocatalysts require expensive noble metals, such as Pt and Rh. There is an urgent need to explore cost-effective alternatives using non-noble metals. Herein, Cu, Cr, and Co were used as non-noble cocatalyst to modify the surface of Ga˗doped SrTiO₃ photocatalyst (Ga-STO (flux)). The characterization results of XPS and TEM revealed the CuCrO_x cocatalysts generated reduced Cu⁰/Cu⁺ species for hydrogen evolution reaction. The inclusion of Cr₂O₃ aided in maintaining the stability of Cu⁰/Cu⁺ species. The Co₃O₄ cocatalysts were responsible for the oxygen evolution reaction. Under simulated sunlight, the optimal CuCrO_x/Co₃O₄/Ga-STO (flux) sample provided the best hydrogen and oxygen production rates of 204.56 μmol·h⁻¹ and 102.28 μmol·h⁻¹ , respectively.

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CuCrOx/Co3O4双助催化剂改性Ga-SrTiO3高效光催化全水分解

钛酸锶（SrTiO3）在光催化整体水裂解（OWS）制氢方面具有很大的潜力。然而，目前基于srtio3的光催化剂需要昂贵的贵金属，如Pt和Rh。迫切需要探索使用非贵金属的具有成本效益的替代品。本文采用Cu、Cr和Co作为非贵金属助催化剂，对Ga- sto（助剂）进行表面修饰。XPS和TEM表征结果表明，CuCrOx助催化剂生成了还原Cu0/Cu+的析氢反应。Cr2O3的加入有助于维持Cu0/Cu+的稳定性。Co3O4助催化剂负责析氧反应。在模拟阳光下，CuCrOx/Co3O4/Ga-STO （flux）样品的最佳产氢率和产氧率分别为204.56 μmol·h⁻¹ 和102.28 μmol·h⁻¹ 。

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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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.