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Thin porous palladium layers modified by cathodically doped graphene and organic donors

Abstract : Thin porous layers of palladium deposited onto gold or Pd bulk metal treated by cathodic redn. in the presence of CsI under super-dry conditions were tested to establish their reactivity towards electrolytes. Specifically, an iono-metallic layer [Pd-4, TMA+ _TMABF4_] was found to be generated in tetra-alkylammonium salts, esp. TMA+, BF-4. This material is then taken as a starting substrate for in situ exchange between BF-4 and many electrogenerated org. acceptor anions. Importantly, the list includes doped graphene and electro-active conducting org. polymers in their basic form. Thus, for example, an intriguing Pd-graphene layer can be created as a relatively thick interface, and may be either doped or un-doped, depending on the applied potential. The method was also shown to work with many org. acceptors (coronene, anthraquinone, etc.) immobilized in their reduced state. The proposed method suggests a new strategy for building stable composite materials of considerable interest for use as electrodes and/or in 3D redox applications.
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Submitted on : Monday, June 19, 2017 - 2:50:25 PM
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Jacques Simonet. Thin porous palladium layers modified by cathodically doped graphene and organic donors. Electrochemistry Communications, Elsevier, 2017, 75, pp.5-8. ⟨10.1016/j.elecom.2016.11.006⟩. ⟨hal-01475810⟩

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