Abstract. To reduce the effects of global warming, visible and near-infrared light must be used more efficiently. Deep ultraviolet light (8 eV) is required for the direct dissociation of CO2 by light; however, the introduction of a metal complex has made it possible to realize CO2 reduction with visible light. We demonstrate that the optical near field (ONF) can increase the CO2 reduction rate. For this, we used gold clusters, because they can be a suitable source for ONFs, as their size and density can be controlled by the number of gold atoms. By attaching a metal complex near gold clusters with diameters of 1.0 to 1.3 nm, we confirm that the reduction rate of CO2 to CO increased by 1.5 to 2.1 times. The gold clusters were sufficiently small; therefore, there was no plasmonic resonant peak or heat generation. Because the near-field effect is based on a photochemical reaction, it can be applied to other metal complexes used in CO2 reduction, and it has other applications such as water splitting and water purification.

中文翻译：

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通过光学近场效应提高 CO2 还原率

摘要。为了减少全球变暖的影响，必须更有效地使用可见光和近红外光。光直接分解 CO2 需要深紫外光 (8 eV)；然而，金属络合物的引入使得用可见光实现二氧化碳还原成为可能。我们证明了光学近场 (ONF) 可以提高 CO2 减少率。为此，我们使用了金簇，因为它们可以作为 ONF 的合适来源，因为它们的大小和密度可以通过金原子的数量来控制。通过在直径为 1.0 至 1.3 nm 的金簇附近附着金属络合物，我们确认 CO2 到 CO 的还原率增加了 1.5 至 2.1 倍。金簇足够小；因此，没有等离子体共振峰或发热。