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首页> 外文期刊>RSC Advances >Bismuth oxide nanoparticles as a nanoscale guide to form a silver-polydopamine hybrid electrocatalyst with enhanced activity and stability for the oxygen reduction reaction
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Bismuth oxide nanoparticles as a nanoscale guide to form a silver-polydopamine hybrid electrocatalyst with enhanced activity and stability for the oxygen reduction reaction

机译：氧化铋纳米颗粒作为纳米级引导件，形成银 - 聚二胺杂化电催化剂，具有增强的活性和稳定性的氧还原反应

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摘要

Highly dispersed Ag nanoparticles (Ag NPs) were successfully synthesized on functionalized polydopamine (PDA)@Bi2O3 NPs for use as an electrocatalyst. In the proposed method, a uniform layer of PDA was first coated on Bi2O3 NPs. The surface of the PDA@Bi2O3 can then be used as a nanoscale guide to deposit Ag NPs and hence for the formation of Ag-PDA@Bi2O3 hybrid nanocatalysts. It was found that Ag NPs enhanced the electrocatalytic ability on PDA@Bi2O3 by a synergetic effect for direct 4e(-) transfer in the oxygen reduction reaction (ORR) with a low overpotential. The surface morphology and lattice fringes of Ag NPs of crystalline nature of the obtained Ag-PDA@Bi2O3 hybrid nanocatalysts were examined through HR-TEM and SAED patterns. The material's purity and chemical functional groups were identified by FT-IR analysis. This strategy provides new opportunities to design and optimize heterogeneous nanocatalysts with tailored size, morphology, chemical configuration and supporting substrates for metal-catalyzed reactions.
机译：在官能化的聚德米胺（PDA）@ Bi2O3 NPS上成功地合成了高度分散的Ag纳米颗粒（Ag NPS），以用作电催化剂。在该方法中，首先在Bi2O3 NPS上涂覆均匀的PDA层。然后，PDA @ Bi2O3的表面可以用作纳米级指南以沉积Ag NPS，因此用于形成Ag-PDA杂交纳米催化剂。发现Ag NPS通过在氧还原反应（ORR）中的直接4e（ - ）转移的协同效果来增强PDA @ Bi2O3上的电催化能力。通过HR-TEM和Saed图案检查所得Ag-PDA杂交纳米催化剂的结晶性质Ag NP的表面形态和晶格状。通过FT-IR分析鉴定了材料的纯度和化学官能团。该策略提供了设计和优化具有定制大小，形态，化学配置和支持金属催化反应的基材的异质纳米催化的新机会。

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

    Murali Settu; Chang Jen-Lin; Zen Jyh-Myng;

  • 作者单位

    Natl Chung Hsing Univ Dept Chem Taichung 40227 Taiwan;

    Natl Chung Hsing Univ Dept Chem Taichung 40227 Taiwan;

    Natl Chung Hsing Univ Dept Chem Taichung 40227 Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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