• 文献标题:   Conductive diamond powder inclusion in drop-tasted graphene for enhanced effectiveness as electrocatalyst substrate
  • 文献类型:   Article
  • 作  者:   SPATARU N, CALDERONMORENO JM, OSICEANU P, KONDO T, TERASHIMA C, POPA M, RADU MM, CULITA D, PREDA L, MIHAI MA, SPATARU T
  • 作者关键词:   conductive diamond powder, dropcasted graphene, platinum electrodeposition, methanol anodic oxidation
  • 出版物名称:   CHEMICAL ENGINEERING JOURNAL
  • ISSN:   1385-8947 EI 1873-3212
  • 通讯作者地址:   Inst Phys Chem Ilie Murgulescu
  • 被引频次:   0
  • DOI:   10.1016/j.cej.2020.126258
  • 出版年:   2020

▎ 摘  要

The possibility of enhancing the electrochemical activity of multilayer graphene (GR) films formed by a simple drop-casting method by the inclusion of a moderate amount of boron-doped diamond powder (BDDP) into the immobilized active material was investigated. Raman spectroscopy experiments suggested that, for electrodes covered with GR-BDDP, edge planes of the graphene platelets are better exposed compared to the case of the GR-modified ones. Cyclic voltammetry measurements performed by using an outer-sphere redox system as test-compound demonstrated that BDDP addition results in an apparent electrocatalytic effect, which was ascribed (based upon the influence of the sweep rate on the voltammetric response) to a larger fraction of pores in the GR-BDDP coating, induced by its more loose morphological structure. The investigation of the methanol oxidation at the Pt-decorated electrodes demonstrated that the use of a GR-BDDP composite as support for the electrocatalyst facilitates the overall process, allows lower Tafel slopes and provides to the supported platinum a better resistance to fouling via CO-poisoning.