Interfacially coupled Cu-cluster/GaN photocathode for efficient CO2 to ethylene conversion

0 CHEMISTRY, MULTIDISCIPLINARY
Bingxing Zhang, Peng Zhou, Zhengwei Ye, Ishtiaque Ahmed Navid, Yuyang Pan, Yixin Xiao, Kai Sun, Zetian Mi
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引用次数: 0

Abstract

The photoelectrochemical synthesis of valuable multicarbon products from carbon dioxide, sunlight and water is a promising pathway for clean energy generation and carbon neutrality. However, it is challenging to create and stabilize efficient C–C coupling sites to achieve multicarbon products with high selectivity, yield and stability. Here we designed a low-coordinated copper-cluster catalyst interfacially coupled in situ with a GaN nanowire photocathode, achieving a high ethylene Faradaic efficiency of 61% and a partial current density of 14.2 mA cm−2, with a robust stability of 116 h. The in situ self-optimized Ga–N–O interface was confirmed to facilitate and stabilize the interfacially oxidized copper species of copper clusters, which function as efficient C–C coupling sites for ethylene production. Furthermore, the hydrogen-feeding effect of GaN for promoting CO hydrogenation also guides the facile CHO-involved C–C coupling pathway. This work sheds light on the interface design and understanding of efficient and stable (photo)electrosynthesis of highly valuable fuels from CO2.

Abstract Image

用于将二氧化碳高效转化为乙烯的簇间耦合铜/氮化镓光电阴极
利用二氧化碳、太阳光和水进行光电化学合成有价值的多碳产品,是实现清洁能源生产和碳中和的一条大有可为的途径。然而,如何创造并稳定高效的 C-C 偶联位点,以获得高选择性、高产率和高稳定性的多碳产物,是一项挑战。在此,我们设计了一种低配位铜簇催化剂,与氮化镓纳米线光电阴极原位界面耦合,实现了高达 61% 的乙烯法拉第效率和 14.2 mA cm-2 的部分电流密度,且稳定性高达 116 h。此外,GaN 在促进 CO 加氢方面的馈氢效应也引导了由 CHO 参与的 C-C 偶联途径。这项工作为从二氧化碳高效、稳定地(光)电合成高价值燃料的界面设计和理解提供了启示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
8.10
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