Journal of Energy Chemistry ›› 2023, Vol. 79 ›› Issue (4): 279-290.DOI: 10.1016/j.jechem.2022.12.056

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Monodispersed ultrathin twisty PdBi alloys nanowires assemblies with tensile strain enhance C2+ alcohols electrooxidation

Xianzhuo Laoa, Ze Lia, Likang Yanga, Ben Zhanga, Wanneng Yeb,*, Aiping Fuc,*, Peizhi Guoa,*   

  1. aInstitute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China;
    bCollege of Physics, State Key Laboratory of Bio-Fibers and Eco-Textiles, Center for Marine Observation and Communications, Qingdao University, Qingdao 266071, Shandong, China;
    cCollege of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, Shandong, China
  • Received:2022-07-28 Revised:2022-12-12 Accepted:2022-12-19 Online:2023-04-15 Published:2023-05-30
  • Contact: * E-mail addresses: ywn@qdu.edu.cn (W. Ye), apfu@qdu.edu.cn (A. Fu), pzguo@q-du.edu.cn (P. Guo).

Abstract: Direct alcohol fuel cells (DAFCs) are powered by the alcohol electro-oxidation reaction (AOR), where an electrocatalyst with an optimal electronic structure can accelerate the sluggish AOR. Interestingly, strain engineering in hetero-catalysis offers a promising route to boost their catalytic activity. Herein, we report on a class of monodispersed ultrathin twisty PdBi alloy nanowires (TNWs) assemblies with face-centered structures that drive AORs. These thin nanowire structures expose a large number of reactive sites. Strikingly, Pd6Bi1 TNWs show an excellent current density of 2066, 3047, and 1231 mA mg-1 for oxida-tion of ethanol, ethylene glycol, and glycerol, respectively. The ‘‘volcano-like” behaviors observed on PdBi TNWs for AORs indicate that the maximum catalytic mass activity is a well balance between active inter-mediates and blocking species at the interface. This study offers an effective and universal method to build novel nanocatalysts in various applications by rationally designing highly efficient catalysts with specific strain.

Key words: PdBi, Nanowires, Strain engineering, Ligand exchange, Synergetic effect, Fuel cells