Increase in CO2 reduction rate via optical near-field effect
Increase in CO2 reduction rate via optical near-field effect
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DOI：
10.1117/1.jnp.14.046011
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发表时间：
2020-10
影响因子：
1.5
通讯作者：
T. Yatsui;Yuki Nakamura;Yosuke Suzuki;Tatsuki Morimoto;Y. Kato;M. Yamamoto;Tomoko Yoshida;Wataru Kurashige;Nobuyuki Shimizu;Y. Negishi;K. Iida;K. Nobusada
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文献类型：
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作者：
T. Yatsui;Yuki Nakamura;Yosuke Suzuki;Tatsuki Morimoto;Y. Kato;M. Yamamoto;Tomoko Yoshida;Wataru Kurashige;Nobuyuki Shimizu;Y. Negishi;K. Iida;K. Nobusada
抽象。为了减少全球变暖的影响，必须更有效地利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可以用可见光实现CO2还原。我们证明了光学近场（ONF）可以提高CO2还原速率。为此，我们使用了金簇，因为它们可以成为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还原为CO的速率增加了1.5至2.1倍。金团簇足够小;因此，没有等离子体共振峰或热产生。由于近场效应是基于光化学反应，因此它可以应用于CO2还原中使用的其他金属络合物，并且它具有其他应用，例如水分解和水净化。
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.