The in situ photodeposition method of copper(0) nanoparticles on TiO₂ is found to produce photoactive heterogeneous catalysts suitable for redox reactions. Several variables in the method that affect catalyst structure and activity have been investigated for H₂ generation as a model reaction. The counter-anion of the copper salt used plays a pivotal role in determining size, distribution and crystallinity of the nanoparticles, as well as leaching, recyclability and stabilisation. Redox cycling between Cu(0) and Cu(II) was found to be extremely facile, with oxidation occurring aerobically and re-reduction under anaerobic irradiation in water.

中文翻译：

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铜纳米粒子在TiO2上的原位光沉积：具有光诱导氧化还原循环的新型催化剂

发现铜（0）纳米粒子在TiO ₂上的原位光沉积方法可产生适用于氧化还原反应的光活性非均相催化剂。已经研究了该方法中影响催化剂结构和活性的几个变量，以作为模型反应对H _2的生成进行了研究。所用铜盐的抗衡阴离子在确定纳米颗粒的尺寸，分布和结晶度以及浸出，可回收性和稳定性方面起着关键作用。发现Cu（0）和Cu（II）之间的氧化还原循环非常容易，在水中厌氧辐射下需氧发生氧化并还原。