title: Underpotential deposition-induced synthesis of composition-tunable Pt-Cu nanocrystals and their catalytic properties.
abstract: Pt-Cu alloy octahedral nanocrystals (NCs) have been synthesized successfully by using N,N-dimethylformamide as both the solvent and the reducing agent in the presence of cetyltrimethylammonium chloride. Cu underpotential deposition (UPD) is found to play a key role in the formation of the Pt-Cu alloy NCs. The composition in the Pt-Cu alloy can be tuned by adjusting the ratio of metal precursors in solution. However, the Cu content in the Pt-Cu alloy NCs cannot exceed 50%. Due to the fact that Cu precursor cannot be reduced to metallic copper and the Cu content cannot exceed 50%, we achieved the formation of the Pt-Cu alloy by using Cu UPD on the Pt surface. In addition, the catalytic activities of Pt-Cu alloy NCs with different composition were investigated in electrocatalytic oxidation of formic acid. The results reveal that the catalytic performance is strongly dependent on Pt-Cu alloy composition. The sample of Pt(50)Cu(50) exhibits excellent activity in electrocatalytic oxidation of formic acid.
authors: State Key Laboratory of Physical Chemistry of Solid Surfaces and the Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China. yqjiang@xmu.edu.cn
authors: Yaqi
authors: Y
authors: Jiang
authors: Yanyan
authors: Y
authors: Jia
authors: Jiawei
authors: J
authors: Zhang
authors: Lei
authors: L
authors: Zhang
authors: Huang
authors: H
authors: Huang
authors: Zhaoxiong
authors: Z
authors: Xie
authors: Lansun
authors: L
authors: Zheng