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首页> 外文期刊>Advanced energy materials >Porous Trimetallic PtRhCu Cubic Nanoboxes for Ethanol Electrooxidation
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Porous Trimetallic PtRhCu Cubic Nanoboxes for Ethanol Electrooxidation

机译：乙醇电氧化多孔三金属PtRhCu立方纳米盒

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摘要

Direct ethanol fuel cells (DEFCs) have great activity as a green energy conversion device. However, the weak activity of most anode electrocatalysts for the C-C bond cleavage is an obstacle to the DEFCs development. Herein, a simple galvanic replacement reaction strategy to synthesize hollow and porous PtRhCu trimetallic nanoboxes (CNBs) with a tunable Pt/Rh atomic ratio is developed. For the ethanol oxidation reaction (EOR), PtRhCu CNBs show morphology and composition-dependent electrocatalytic activity. The composition optimized Pt54Rh4Cu42 CNBs exhibit excellent specific and mass activity and stability for the EOR, which is attributed to its unique geometric structure and synergistic effects. The hollow porous structure can effectively enhance the atomic utilization and mass transfer. The introduction of Cu improves the antipoisoning capability for CO. The introduction of Rh elevates the self-stability of PtRhCu CNBs. More importantly, further electrochemical results confirm that the introduction of Rh significantly promotes the cleavage of C-C bonds, leading to the transformation of the main catalytic pathway for EOR from C-2 to C-1 pathway. The real concentration detection for C-2 products (CH3COOH and CH3CHO) shows Pt54Rh4Cu42 CNBs have a nearly 11.5-fold C-1 pathway enhancement compared to Pt nanoparticles, showing an obvious selectivity enhancement for the C-1 pathway.
机译：直接乙醇燃料电池（DEFC）作为绿色能源转换装置具有很大的活性。但是，大多数阳极电催化剂对C-C键断裂的活性较弱，这是DEFCs发展的障碍。本文中，开发了一种简单的电置换反应策略，以合成具有可调Pt / Rh原子比的中空和多孔PtRhCu三金属纳米盒（CNB）。对于乙醇氧化反应（EOR），PtRhCu CNBs表现出形态和成分依赖性的电催化活性。成分优化的Pt54Rh4Cu42 CNB表现出优异的比活和质量活度以及对EOR的稳定性，这归因于其独特的几何结构和协同效应。中空多孔结构可以有效地提高原子利用率和传质。铜的引入改善了对CO的抗毒能力。Rh的引入提高了PtRhCu CNB的自稳定性。更重要的是，进一步的电化学结果证实，Rh的引入显着促进了C-C键的裂解，从而导致EOR的主要催化途径从C-2转变为C-1途径。对C-2产物（CH3COOH和CH3CHO）的实际浓度检测结果显示，与Pt纳米颗粒相比，Pt54Rh4Cu42 CNB具有近11.5倍的C-1途径增强，显示出对C-1途径的明显选择性增强。

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  • 来源
    《Advanced energy materials》 |2018年第24期|1801326.1-1801326.10|共10页
  • 作者

    Han Shu-He; Liu Hui-Min; Chen Pei; Jiang Jia-Xing; Chen Yu;

  • 作者单位

    Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Key Lab Appl Surface & Colloid Chem, Minist Educ,Shaanxi Key Lab Adv Energy Devices,Sc, Xian 710062, Shaanxi, Peoples R China;

    Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Key Lab Appl Surface & Colloid Chem, Minist Educ,Shaanxi Key Lab Adv Energy Devices,Sc, Xian 710062, Shaanxi, Peoples R China;

    Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Key Lab Appl Surface & Colloid Chem, Minist Educ,Shaanxi Key Lab Adv Energy Devices,Sc, Xian 710062, Shaanxi, Peoples R China;

    Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Key Lab Appl Surface & Colloid Chem, Minist Educ,Shaanxi Key Lab Adv Energy Devices,Sc, Xian 710062, Shaanxi, Peoples R China;

    Shaanxi Normal Univ, Key Lab Macromol Sci Shaanxi Prov, Key Lab Appl Surface & Colloid Chem, Minist Educ,Shaanxi Key Lab Adv Energy Devices,Sc, Xian 710062, Shaanxi, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    C-C bond cleavage; ethanol oxidation reaction; hollow and porous structures; reaction pathway; trimetallic alloys;

    机译：碳-碳键断裂;乙醇氧化反应;中空和多孔结构;反应路径;三金属合金;

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