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首页> 外文期刊>RSC Advances >CTAB-reduced synthesis of urchin-like Pt-Cu alloy nanostructures and catalysis study towards the methanol oxidation reaction
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CTAB-reduced synthesis of urchin-like Pt-Cu alloy nanostructures and catalysis study towards the methanol oxidation reaction

机译：CTAB减少的金属素样PT-Cu合金纳米结构和催化研究朝甲醇氧化反应

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摘要

Urchin-like PtCu alloy nanostructures were fabricated using a facile co-reduction approach, and the cationic surfactant cetyltrimethylammonium bromide (CTAB) served as the reducing agent. The reaction temperature highly influenced the reducing activity of CTAB, and no reducing activity was exhibited when the reaction temperature was below 120 ° C. During the formation process of urchin-like PtCu alloy nanostructures, partial CTAB firstly reacted with H2PtCl6 to produce a yellow colloid precipitation, which could reduce the generation rate of Pt atoms and benefit the alloying of Cu with metallic Pt to form the PtCu alloy. Compared with pure Pt, the PtCu alloy catalyst exhibited a much higher catalytic efficiency and stability towards the methanol oxidation reaction. It was proposed that the enhanced catalytic activity of the PtCu alloy was attributed to the downshift of the d-band center of Pt, which greatly reduced the affinity energy with CO* intermediate species.
机译：使用容易还原方法制造胰蛋白质的PTCU合金纳米结构，并用作还原剂的阳离子表面活性剂十六烷基铵（CTAB）。 反应温度高度影响CTAB的还原活性，并且当反应温度低于120℃时，不显示还原活性。在胰蛋白酶样PTCU合金纳米结构的形成过程中，部分CTAB与H2PTCL6反应以产生黄色胶体 沉淀，这可以降低Pt原子的产生率，使Cu与金属Pt合金化与金属Pt形成PTCU合金。 与纯PT相比，PTCU合金催化剂表现出更高的催化效率和朝甲醇氧化反应的稳定性。 提出，PTCU合金的增强催化活性归因于PT的D频带中心的下降，这大大降低了具有CO *中间物种的亲和能量。

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  • 来源
    《RSC Advances》 |2015年第114期|共6页
  • 作者

    Wenjun Kang; Rui Li; Denghu Wei;

  • 作者单位

    Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology Department of Chemistry Liaocheng University Liaocheng 252059 China.;

    Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology Department of Chemistry Liaocheng University Liaocheng 252059 China.;

    School of Materials Science and Engineering Liaocheng University Liaocheng 252059 China;

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  • 正文语种 eng
  • 中图分类 化学;
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