Efficient overall water splitting of a suspended photocatalyst boosted by metal-support interaction

IF 35.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2024-01-17 DOI:10.1016/j.joule.2023.12.005

Yu Qi , Boyang Zhang , Guanhua Zhang , Zhaoke Zheng , Tengfeng Xie , Shanshan Chen , Guijun Ma , Can Li , Kazunari Domen , Fuxiang Zhang

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Abstract

Strong metal-support interaction (SMSI) has been widely discussed for activity promotion of heterogeneous catalysis, but the effect of SMSI on photocatalysis remains unclear. Here, we employ bismuth vanadate (BiVO₄)-supported iridium (denoted as Ir/BVO) as a model photocatalyst to observe highly dispersed iridium overlayers as well as moderate SMSI effect between Ir and BiVO₄. It is revealed that charge separation on the Ir/BVO can be remarkably promoted by the SMSI effect. Together with the right distribution of dual cocatalysts (Ir and IrO₂) achieved by a simple photoinduction, the water oxidation activity on optimal Ir/BVO is about 75 times higher than that on pristine BVO. Finally, we construct an effective redox-driven Z-scheme overall water splitting system with a benchmark apparent quantum efficiency of 16.9% under visible light irradiation of 420 ± 10 nm at room temperature. Our work extends the application of SMSI to photocatalysis to provide an alternative way of promoting photocatalytic activity.

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金属与支撑物相互作用促进悬浮光催化剂的高效整体水分离

强金属-支撑相互作用（SMSI）在促进异相催化活性方面已被广泛讨论，但 SMSI 对光催化的影响仍不清楚。在此，我们采用钒酸铋（BiVO4）支撑的铱（记为 Ir/BVO）作为模型光催化剂，观察高度分散的铱叠层以及 Ir 和 BiVO4 之间适度的 SMSI 效应。研究表明，SMSI 效应可显著促进 Ir/BVO 上的电荷分离。再加上通过简单的光诱导实现的双催化剂（Ir 和 IrO2）的正确分布，最佳 Ir/BVO 上的水氧化活性比原始 BVO 上的水氧化活性高出约 75 倍。最后，我们构建了一个有效的氧化还原驱动 Z 型整体水分离系统，在室温 420 ± 10 纳米可见光照射下，其基准表观量子效率为 16.9%。我们的工作扩展了 SMSI 在光催化方面的应用，为促进光催化活性提供了另一种途径。

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来源期刊

Joule Energy-General Energy

CiteScore

53.10

自引率

2.00%

发文量

198

期刊介绍： Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.