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首页> 外文期刊>RSC Advances >Superior methanol electrooxidation activity and CO tolerance of mesoporous helical nanospindle-like CeO2 modified Pt/C
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Superior methanol electrooxidation activity and CO tolerance of mesoporous helical nanospindle-like CeO2 modified Pt/C

机译：高级甲醇电氧化活性和介孔螺旋纳米载体的CO容差状CEO2改性PT / C.

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摘要

In an attempt to enhance the electrocatalytic activity and CO tolerance of ceria modified Pt/C electrodes, a novel structured ceria material has been developed. Left-handed helical CeO2 nano-spindles with mesoporous structures were successfully synthesized through a template-free based precursor method on a large scale. By a microwave-assisted polyol synthesis process, the ceria modified Pt/C electrocatalysts were synthesized. The helical CeO2 nanospindle based electrode Pt@Heli-CeO2/C exhibits superior electrochemically active surface areas, and significantly enhanced methanol oxidation catalytic activity and CO antipoisoning activity, compared to Pt/C and a nano-octahedral CeO2 modified electrode Pt@Octa-CeO2/C. The experimental results show that Pt@Heli-CeO2/C possesses 8.2 times and 3.2 times higher activity for methanol electrooxidation than Pt/C and Pt@Octa-CeO2/C, respectively. This remarkable enhancement could be attributed to the reasons as follows: compared to octahedral CeO2, the unique helical CeO2 is more conductive with better electron transfer and can provide more active surface sites to strengthen the support-metal interactions based on an electronic transfer mechanism from CeO2 to Pt, thus helical CeO2 can promote better dispersion of the Pt(0) nanocrystallites and a high concentration of metallic Pt(0) in the composition.
机译：为了提高Ceria改性Pt / C电极的电催化活性和Co容差，已经开发了一种新型结构化的二氧化铈材料。通过大规模的基于模板的前体方法成功地合成了左手螺旋CeO2纳米锭剂。通过微波辅助多元醇合成方法，合成了二氧化铈改性的Pt / C电催化剂。基于螺旋CeO2纳米吲哚吲哚电极PT @ Heli-CeO2 / C表现出优异的电化学活性表面积，并且与Pt / C和纳米八面线CeO2改性电极Pt @ Octa-CeO2进行了显着增强的甲醇氧化催化活性和CO反散体活性。 /C。实验结果表明，PT @ Heli-CeO2 / C分别具有比Pt / C和Pt @ Octa-CeO2 / C的甲醇电氧化的8.2倍和3.2倍。这种显着的增强可能归因于如下所附的原因：与八面体CEO2相比，独特的螺旋CEO2与更好的电子转移更具导电，并且可以提供更多的活性表面位点，以加强基于CEO2的电子转移机制的支持金属相互作用。因此，螺旋CeO 2可以促进Pt（0）纳米晶体的更好分散和在组合物中的高浓度金属Pt（0）。

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  • 来源
    《RSC Advances》 |2015年第79期|共13页
  • 作者

    Chen Jing; Li Songmei; Du Juan; Liu Jianhua; Yu Mei; Meng Shiming; Wang Bo;

  • 作者单位

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

    Beihang Univ Sch Mat Sci &

    Engn Key Lab Aerosp Adv Mat &

    Performance Minist Educ Beijing 100191 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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