One-Pot Synthesis of Cobalt-Doped Pt-Au Alloy Nanoparticles Supported on Ultrathin α-Co(OH)2 Nanosheets and Their Enhanced Performance in the Reduction of p-Nitrophenol
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- 作者：Yan Long ; Jian Li ; Lanlan Wu ; Junqi Li ; Xiao Wang ; Shuang Yao ; Shuyan Song and Hongjie Zhang
- 刊名：European Journal of Inorganic Chemistry
- 出版年：2017
- 出版时间：January 3, 2017
- 年：2017
- 卷：2017
- 期：1
- 页码：146-152
- 全文大小：1809K
- ISSN：1099-0682c
文摘
Cobalt-doped Pt–Au alloy nanoparticles with a narrow size distribution and small sizes of ca. 4 nm were deposited on ultrathin α-Co(OH)2 nanosheets through a one-pot method. The whole process could be divided into two steps: coreduction by NaBH4 and subsequent partial oxidation by air. The compositions of the as-prepared y-PtxAu100–x/Co(OH)2 (x = 0, 25, 50, 75, 100, y = 1 %, 10 %) materials can be accurately controlled by adjusting the amounts of the raw materials. The structure of y-PtxAu100–x/Co(OH)2 was affected by the doped cobalt. The effects of ultrathin α-Co(OH)2 nanosheets and the chemical composition of PtxAu100–x NPs on the catalytic activity for the reduction of 4-nitrophenol (4-NP) were investigated systematically. 1 %-Pt50Au50/Co(OH)2 exhibits the most significantly enhanced catalytic activity. Its much higher activity than those of 1 %-Pt/Co(OH)2, 1 %-Au/Co(OH)2, and a physical mixture of Pt50Au50 nanoparticles and ultrathin α-Co(OH)2 nanosheets suggests that there is a synergy between the Pt and Au and between the PtxAu100–x nanoparticles and the supports.