In view of the great importance of finding ways to reduce CO₂ by using solar energy, we have examined the advantage of employing heterostructures containing bimetallic alloys for the purpose. This choice is based on the knowledge that metals such as Pt reduce CO₂, although the activity may not be considerable. Our studies on the reduction of CO₂ by ZnO/M/CdS (M = Ag, Au, Ag_1-xAu_x, Ag_1-xCu_x) heterostructures in liquid phase have shown good results specially in the case of ZnO/Ag_1-xCu_x/CdS, reaching a CO production activity of 327.4 µmol h^-1g^-1. The heterostructures also reduce CO₂ in the gas-phase although the production activity is not high. Some of the heterostructures exhibit reduction of CO₂ even in the absence of a sacrificial reagent.

中文翻译：

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ZnO / Ag _1-x Cu _x / CdS及其相关异质结构光催化还原CO ₂

考虑到寻找通过使用太阳能来减少CO ₂的方式的重要性，我们已经检查了为此目的采用含有双金属合金的异质结构的优点。该选择基于如下知识，即诸如Pt的金属会还原CO ₂，尽管活性可能不大。我们对ZnO / M / CdS（M = Ag，Au，Ag _1-x Au _x，Ag _1-x Cu _x）液相异质结构还原CO ₂的研究显示出了良好的效果，特别是在ZnO / Ag _1-x Cu _x / CdS，CO生成活性达到327.4 µmol h ^-1 g ^-1。尽管生产活性不高，但异质结构还降低了气相中的CO ₂。即使不存在牺牲试剂，一些异质结构也显示出CO _2的减少。