CdIn₂S₄ micro-flower spheres modified with Au NPs and rGO have been designed for CO₂ photoreduction. The photoproduction yields of CO and CH₄ were 4 and 5 times higher than that of pure CdIn₂S₄, respectively. The photoproduction of CO and CH₄ from the photocatalytic CO₂ reduction process has been evidenced by ¹³C isotope tracer tests. Au NPs act as both the acceptor of photogenerated electrons and the donor of hot electrons at the CdIn₂S₄ and rGO interface. Three electron transfer channels: CdIn₂S₄ → Au → rGO, CdIn₂S₄ → Au, and Au → rGO, efficiently improve the transfer efficiency of electrons. Meanwhile, CO₂ adsorption is largely improved, as confirmed by DFT calculations which indicate that the CO₂ adsorption ability of the C sites from rGO has been enhanced by Au NPs. In situ FTIR has been carried out to research the CO₂ photoreduction process. This work demonstrates the importance of efficient electron transfer and excellent CO₂ adsorption in improving the efficiency of CO₂ photoreduction, providing an inspiring concept for future advancement in this area.

中文翻译：

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高效CO2光还原的多界面电子转移方案的构建：以Au纳米粒子和氧化石墨烯修饰的CdIn2S4微花球为例的案例研究

已设计了用Au NP和rGO修饰的CdIn ₂ S ₄微花球，用于CO _2光还原。CO和CH ₄的光生产率分别比纯CdIn ₂ S ₄高4倍和5倍。通过¹³ C同位素示踪剂试验证明了光催化还原CO ₂产生的CO和CH ₄的光产生。Au NPs在CdIn ₂ S ₄和rGO界面上既充当光生电子的受体，又充当热电子的施主。三个电子传输通道：CdIn ₂ S ₄→Au→rGO，CdIn ₂ S ₄ →Au和Au→rGO，可有效提高电子的传输效率。同时，正如DFT计算所证实的那样，CO ₂吸附得到了很大的改善，这表明Au NPs增强了rGO对C位的CO ₂吸附能力。已经进行了原位FTIR以研究CO _2光还原过程。这项工作证明了有效的电子转移和出色的CO ₂吸附在提高CO _2光还原效率方面的重要性，为该领域的未来发展提供了启发性的概念。