Au Cluster-Decorated CeO2 for High-Efficiency Photothermal Catalytic Reduction of CO2 to CH4

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-09-09 DOI:10.1007/s10562-025-05155-w

Changjun You, Junhai Wang, Yuan Yin, Boyi Yang, Yitao Si, Jiancheng Zhou

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Abstract

Photothermal catalytic CO₂ conversion into chemical fuels is of economic value, yet it faces the challenges of low efficiency and instability. To address these issues, this study developed a solar-light-driven catalysis system using Au₈/CeO₂ and concentrated irradiation to enhance CO₂ conversion performance. This system contributes to a significant solar-to-chemical energy conversion efficiency improvement from 0.12 to 0.35‰. Simultaneously, the CH₄ production rate was improved by 21.7-fold (from 12.9 to 280.2 μmol g⁻¹ h⁻¹) compared to the benchmark CeO₂ photocatalyst. During the reaction, Au clusters demonstrated enhanced light absorption capacity and elevated surface temperature of the photocatalyst, which increased charge carrier concentration, up-shifted the Fermi level, and reduced apparent activation energy. These effects synergistically promoted reaction efficiency. This catalysis system offers an efficient and sustainable approach for solar-driven CO₂ conversion, presenting promising potential for practical applications in renewable energy utilization.

Graphical Abstract

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金簇修饰CeO2高效光热催化还原CO2制CH4

光热催化CO2转化为化学燃料具有经济价值，但存在效率低、不稳定等问题。为了解决这些问题，本研究开发了一种利用Au8/CeO2和集中照射的太阳能光驱动催化系统，以提高CO2的转化性能。该系统将太阳能-化学能转换效率从0.12‰显著提高到0.35‰。同时，CH4产率提高了21.7倍（由12.9 μmol g−1 h−1提高到280.2 μmol g−1 h−1）。在反应过程中，Au团簇表现出增强的光吸收能力和光催化剂表面温度的升高，使得载流子浓度增加，费米能级上移，表观活化能降低。这些效应协同提高了反应效率。该催化系统为太阳能驱动的二氧化碳转化提供了一种高效和可持续的方法，在可再生能源利用的实际应用中具有很大的潜力。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.