Amorphous CuPt Alloy Nanotubes Induced by Na2S2O3 as Efficient Catalysts for the Methanol Oxidation Reaction
Amorphous CuPt Alloy Nanotubes Induced by Na2S2O3 as Efficient Catalysts for the Methanol Oxidation Reaction
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DOI：
10.1021/acscatal.6b00540
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发表时间：
2016-05
期刊：
影响因子：
12.9
通讯作者：
Yige Zhao;Jingjun Liu;Chenguang Liu;Feng Wang;Ye Song
中科院分区：
文献类型：
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作者：
Yige Zhao;Jingjun Liu;Chenguang Liu;Feng Wang;Ye Song
在本文中，我们提出了非晶态CuPT合金中空纳米管作为Na2S2O辅助电偶置换反应制备的甲醇氧化反应(MOR)的有效催化剂。其形成机理可以用电流置换反应的纳米级Kirkendall效应诱导的空化过程来解释。电化学测试表明，非晶态CuPT合金表现出比晶态CuPT和商品铂/碳催化剂更好的静曲活性和稳定性，这可以归因于非晶态合金抗CO能力的提高。XPS测量表明，非晶态CuPT合金的抗CO毒性增强特性源于其独特的晶化状态导致了铂原子与铜原子之间的强相互作用。这一研究不仅为非晶态合金的合成提供了一条简便的途径，而且为非晶态铂基合金在金属氧化物中的应用开辟了一条有趣的途径。
Here we propose amorphous CuPt alloy hollow nanotubes as efficient catalysts for the methanol oxidation reaction (MOR) prepared by Na2S2O3-assisted galvanic replacement reaction. The formation mechanism can be explained by the nanoscale Kirkendall-effect-induced hollowing process of the galvanic replacement reaction. The electrochemical tests suggest that the amorphous CuPt alloy exhibits better MOR activity and stability than the crystalline CuPt and commercial Pt/C catalysts, which can be ascribed to the enhanced CO tolerance ability of amorphous alloy. XPS measurements demonstrate that the enhanced anti-CO poison characteristic of amorphous CuPt alloy originates from the strong interaction between Pt and Cu atoms as a result of a unique crystallization state. This research not only provides a facile approach to synthesize amorphous alloy but also opens up an interesting way for amorphous Pt-based alloy to apply to the MOR.