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Solvent Engineering of Highly Conductive and Porous Fullerene Ammonium Iodide for Immobilizing Pd Nanoparticles with Enhanced Electrocatalytic Activity Toward Ethanol Oxidation

  • Zhouchen Lin
  • Huanhuan Wang
  • Ming LeiEmail author
Original Research

Abstract

So far, the application of fullerene derivative support in electrocatalysis has been limited by fullerene’s low electronic conductivity and the difficulty in film morphology control. Although highly conductive (1.5 s m−1) fullerene ammonium iodide (PCBANI) had been demonstrated to be a potential support, the solid self-assembled film is not of benefit for metallic nanoparticle (NP) to exhibit catalytic activity. In this work, we found solvent engineering of pristine PCBANI aggregate could maintain stacked short-range assembly structure and porous morphology. Moreover, PCBANI film fabricated from the optimized DMSO/methanol could immobilize Pd NPs with a uniform size of around 4.8 ± 1.7 nm which was characterized by SEM, TEM, and SAED. The resulting Pd/PCBANI-1-coated electrode exhibits a mass-specific activity for Pd of 3361.0 mA mg−1 at a scan rate of 50 mV s−1 and good stability toward alcohol electrooxidation, which are both significantly higher than that of the Pd/PCBANI-2 fabricated from PCBANI’s acetic acid/methanol dispersion and commercial Pd/C (active carbon). To the best of our knowledge, Pd/PCBANI-1 exhibits almost the highest catalytic activity among the existing fullerene-based Pd nanocatalysts. The high performance of the as-fabricated catalyst is attributed to highly conductive and porous PCBANI support, good dispersibility of Pd NPs on support, and favorable mass transfer.

Graphical Abstract

Highly conductive and porous fullerene ammonium iodide film fabricated from the optimized DMSO/methanol dispersion could be used as a synergistic support to immobilize Pd nanoparticle electrocatalyst which exhibits a highly mass-specific activity for Pd of 3361.0 A g−1.

Keywords

Highly conductive fullerene Solvent engineering Pd nanoparticle Electrocatalyst Ethanol oxidation 

Notes

Funding Information

This study received financial support from the National Natural Science Foundation of China (grant nos. 21442005 and 21642008).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no competing interest.

Supplementary material

12678_2019_535_MOESM1_ESM.docx (89 kb)
ESM 1 (DOCX 88 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of ChemistryZhejiang UniversityHangzhouChina

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