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Article Navigation >  Green Energy&Environment  > 2019  >  4(3): 254-263
Dong Chen, Linlin Xu, Hui Liu, Jun Yang. Rough-surfaced bimetallic copper–palladium alloy multicubes as highly bifunctional electrocatalysts for formic acid oxidation and oxygen reduction. Green Energy&Environment, 2019, 4(3): 254-263. doi: 10.1016/j.gee.2018.09.002
Citation: Dong Chen, Linlin Xu, Hui Liu, Jun Yang. Rough-surfaced bimetallic copper–palladium alloy multicubes as highly bifunctional electrocatalysts for formic acid oxidation and oxygen reduction. Green Energy&Environment, 2019, 4(3): 254-263. doi: 10.1016/j.gee.2018.09.002
shu

Rough-surfaced bimetallic copper–palladium alloy multicubes as highly bifunctional electrocatalysts for formic acid oxidation and oxygen reduction

doi: 10.1016/j.gee.2018.09.002
  • a.

    State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

  • b.

    Center for Mesoscience, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

  • c.

    University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China

  • d.

    Zhongke Langfang Institute of Process Engineering, Fenghua Road No 1, Langfang Economic & Technical Development Zone, Hebei 065001, China

More Information
  • Corresponding author: E-mail address: jyang@ipe.ac.cn (Jun Yang)
  • Received date 14 August 2018, Accepted date 26 September 2018, RevRecd date 17 September 2018, Available online 04 October 2018, Publish date 31 July 2019,
    Abstract
  • Engineering the morphology of nanomaterials and modifying their electronic structure are effective ways to improve their performance in electrocatalysis. Through combining the co-reduction of Pd2+ and Cu2+ precursors with a digestive ripening process in oleylamine, we report the synthesis of copper-palladium (CuPd) alloy multicubes with rough surfaces. Benefiting from their alloy and unique rough-surfaced structure, which provides ample edge/corner and step atoms as well as the electronic coupling between Cu and Pd leading to the lower of d-band center, the rough-surfaced CuPd alloy multicubes show much better electrocatalytic performance not only for formic acid oxidation but also for oxygen reduction in comparison with those of spherical CuPd alloy nanoparticles and commercial Pd/C catalyst. In contrast, we confirm that the rough-surfaced CuPd alloy multicubes only exhibit very low Faradaic efficiency (34.3%) for electrocatalytic conversion of carbon dioxide (CO2) to carbon monoxide (CO) due to the presence of strong competing hydrogen evolution reaction, which results in their very poor selectivity for the reduction of CO2 to CO. The findings in this study not only offer a promising strategy to produce highly effective electrocatalysts for direct formic acid fuel cells, but also enlighten the ideas to design efficient electrocatalysts for CO2 reduction.

     

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