Abstract
In this communication a hybrid electrosynthetic approach for preparingAu/ZnOnanocompositeispresentedcombininginitialelectrodeposition of ZnO nanorod arrays followed by subsequent galvanic replacement of the co-deposited Zn with Au to yield the targeted nanoarchitecture. Among the many oxide semiconductor candidates for solar photoelectrochemical applications, zinc oxide (ZnO) has received much attention because of its high stability, high electron mobility, and low toxicity in neutral and alkaline media. 1‐3 However, thelargebandgap(Eg =∼ 3.4eV)ofthismaterialisamajordrawback, whichmakesZnOonlyrespondtowavelengthsintheUVregion.Considering that the UV component comprises less than ∼5% of the solar spectrum, semiconductors with smaller band gaps or alternatively, metal/semiconductor composite materials are desirable.
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