N-doped Cdot/PtPd nanonetwork hybrid materials as highly efficient electrocatalysts for methanol oxidation and formic acid oxidation reactions

摘要

The improvement of the catalytic performance for methanol and formic acid oxidation reactions remains a key issue for the development of a new generation of direct methanol and formic acid fuel cells. This study reports a simple approach, using selective chemical etching for the synthesis of unique nitro-gendoped carbon dot/Pt84Pd16 (N-Cdot/Pt84Pd16) nano-network structure at room temperature with excellent electrocatalytic properties. The obtained nano-network hybrid material exhibits significant enhancement of the electrocatalytic activity for the electro-oxidation reaction of both methanol and formic acid with current densities of 999.0 and 1919.5 mA/mg(metal), respectively, compared with the commercial ones of 751.32 and 806.02 mA/mg(metal), respectively. Furthermore, the N-Cdot/Pt84Pd16 nano-network hybrid materials exhibit excellent stability and hydrophilic dispersibility at room temperature. (C) 2018 Elsevier B.V. All rights reserved.