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A Core-Shell Nanoporous Pt-Cu Catalyst with Tunable Composition and High Catalytic Activity

机译：具有可调组成和高催化活性的核-壳纳米孔Pt-Cu催化剂

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摘要

Composition-controlled fabrication of bimetallic catalysts is of significance in electrochemical energy conversion and storage. A novel nanoporous Pt-Cu bimetallic catalyst with a Pt skin and a Pt-Cu core, fabricated by electro-chemically dealloying a bulk Pt-Cu binary alloy using a potential-controlled approach, is reported. The Pt/Cu ratio of the dealloyed nanoporous catalyst can be readily adjusted in a wide composition range by only controlling dealloying potential. The electro-catalytic performance of the nanoporous Pt-Cu catalyst shows evident dependence on Pt/Cu ratio although the surfaces of all the nanoporous catalysts are characterized to be covered by pure Pt. With optimal compositions, the dealloyed nanoporous Pt-Cu catalyst possesses enhanced electrocatalytic activities toward oxygen reduction reaction and formic acid oxidation in comparison with the commercial Pt/C catalyst.
机译：双金属催化剂的成分控制制造对电化学能量转换和存储具有重要意义。报道了一种新颖的具有Pt皮层和Pt-Cu核的纳米多孔Pt-Cu双金属催化剂，它是通过电势控制的方法对大块Pt-Cu二元合金进行电化学脱合金而制得的。通过仅控制脱合金电位，可以容易地在宽的组成范围内调节脱合金纳米孔催化剂的Pt / Cu比。尽管所有纳米多孔催化剂的表面都被纯铂覆盖，但纳米多孔Pt-Cu催化剂的电催化性能表现出明显的对Pt / Cu比的依赖性。具有最佳的组成，与市售的Pt / C催化剂相比，脱合金的纳米多孔Pt-Cu催化剂对氧还原反应和甲酸氧化具有增强的电催化活性。

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  • 来源
    《Advanced Functional Materials》 |2013年第33期|4156-4162|共7页
  • 作者

    Xingbo Ge; Luyang Chen; Jianli Kang; Takeshi Fujita; Akihiko Hirata; Wei Zhang; Jianhua Jiang; Mingwei Chen;

  • 作者单位

    WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577, Japan;

    WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577, Japan;

    WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577, Japan;

    WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577, Japan;

    WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577, Japan;

    School of Materials Science and Engineering Dalian University of Technology Dalian 116024, China;

    School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200030, P. R. China;

    State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University, Shanghai 200030, P. R. China CREST, JST, 4-1-8 Honcho Kawaguchi Saitama 332-0012, Japan WPI Advanced Institute for Materials Research Tohoku University Sendai 980-8577, Japan;

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