Crystalline palladium-cobalt alloy nanoassemblies with enhanced activity and stability for the formic acid oxidation reaction

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• 作者：Lu Zhang ; Ling Wan ; Yanrong Ma ; Yu Chen ; ^{ndchenyu@yahoo.cn} ; Yiming Zhou ; Yawen Tang ; ^{tangyawen@njnu.edu.cn} ; Tianhong Lu
• 关键词：3D network ; Palladium&ndash ; cobalt alloy nanoassemblies ; Cyanogel ; Electrocatalytic activity ; Formic acid oxidation reaction
• 刊名：Applied Catalysis B: Environmental
• 出版年：2013
• 出版时间：17 July, 2013
• 年：2013
• 卷：138-139
• 期：Complete
• 页码：229-235
• 全文大小：1706 K

文摘

In this work, we conveniently synthesize the three-dimensionally (3D) networks-like palladium-cobalt alloy nanoassemblies (Pd-Co ANAs) through a simple simultaneous reduction reaction with sodium borohydride using inorganic K₂PdCl₄/K₃Co(CN)₆ cyanogel as reaction precursors, and clarify the formation mechanism of 3D networks structure and generation mechanism of Pd-Co alloy at room temperature. The morphology, structure, size and composition of the Pd-Co ANAs are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy dispersive spectrum (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry, chronoamperometry and CO-stripping voltammetry tests demonstrate the Pd-Co ANAs have higher electrocatalytic activity, better electrochemical stability, and higher resistance to CO poisoning over single-component Pd nanoparticles for the formic acid oxidation reaction (FAOR) owing to their unique 3D structure and alloy property.