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首页> 外文期刊>RSC Advances >Visible light assisted electro-photo synergistic catalysis of heterostructured Pd-Ag NPs/graphene for methanol oxidation
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Visible light assisted electro-photo synergistic catalysis of heterostructured Pd-Ag NPs/graphene for methanol oxidation

机译：可见光辅助电镀催化催化催化催化PD-AG NPS /石墨烯用于甲醇氧化

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摘要

In this work, a facile method was used to synthesize the heterostructured bimetallic catalyst Pd-Ag/graphene (simplified as Pd-Ag/GNs). In order to achieve the heterostructured Pd-Ag nanoparticles (NPs), Ag2O was firstly produced on GNs from AgOH under UV irradiation, then the heterogeneous phase between the precursor Pd2+ and Ag2O contributes to the formation of the highly dispersed heterostructured Pd-Ag NPs with the average diameter of 5 nm on GNs after a synchronous reduction process. Electro-catalytic performances of Pd-Ag/GNs were investigated by cyclic voltammetry (CV), chronoamperometry, COad stripping voltammetry, and electrochemical impedance spectroscopy (EIS). It is shown that Pd-Ag/GNs has a much higher catalytic activity (595 mA mg(-1)) and stability for methanol oxidation reaction (MOR) and improved tolerance of CO compared with the counterpart Pd/GNs and the commercial 20% Pd/C catalyst (Pd/C-SA). And under visible light irradiation, the catalytic activity and stability of Pd-Ag/GNs are remarkably enhanced. Especially, its mass activity is 1128 mA mg(-1) which is 1.9 times higher than that without light irradiation. The significantly improved performance benefits from the efficient electro-photo synergistic catalysis for MOR under visible light irradiation, which is in favor of harvesting sunlight to produce clean energy.
机译：在这项工作中，用于合成异质化双金属催化剂PD-Ag /石墨烯的容易方法（简化为PD-AG / GNS）。为了实现异质结构的Pd-Ag纳米颗粒（NPS），在紫外线照射下首先在GNS上产生Ag 2 O，然后前体Pd2 +和Ag 2 O之间的异质相有助于形成高度分散的异质结构PD-Ag NPS在同步减少过程后GNS平均直径为5nm。通过循环伏安法（CV），计时率，CoAD溶出伏安法和电化学阻抗光谱（EIS）研究了PD-AG / GNS的电催化性能。结果表明，PD-AG / GNS具有更高的催化活性（595mA mg（-1）），与甲醇氧化反应（MOR）的稳定性以及与对应PD / GNS和商业20％相比的CO的耐受性。 PD / C催化剂（PD / C-SA）。在可见光照射下，显着增强了PD-Ag / GNS的催化活性和稳定性。特别是，其质量活性为1128 mA mg（-1），比没有光照照射的1.9倍。在可见光照射下，Mor高效电光协同催化剂的显着提高了性能优势，有利于收获阳光以产生清洁能量。

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  • 来源
    《RSC Advances》 |2016年第83期|共9页
  • 作者

    Li Zhongshui; Ye Lingting; Wang Yanli; Xu Shuhong; Lei Fengling; Lin Shen;

  • 作者单位

    Fujian Normal Univ Coll Chem &

    Chem Engn Fuzhou 350007 Peoples R China;

    Chinese Acad Sci Fujian Inst Res Struct Matter Key Lab Design &

    Assembly Funct Nanostruct Fuzhou 350002 Fujian Peoples R China;

    Fujian Normal Univ Coll Chem &

    Chem Engn Fuzhou 350007 Peoples R China;

    Fujian Normal Univ Coll Chem &

    Chem Engn Fuzhou 350007 Peoples R China;

    Fujian Normal Univ Coll Chem &

    Chem Engn Fuzhou 350007 Peoples R China;

    Fujian Normal Univ Coll Chem &

    Chem Engn Fuzhou 350007 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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