Dealloyed different atom ratios Pdx(FeCo)10-x, nanoparticle: Promising electrocatalyst towards ethylene glycol oxidation

To improve the electrochemical performance of Pd-based catalysts for ethylene glycol oxidation (EGOR), a series of dealloyed Pd-x(FeCo)(10-x)/C (Pd:FeCo = 3:7-9:1) catalysts have been synthesized by dealloying process in acid solution. The electrocatalytic results show that the electrocatalytic performances of D-Pd-x(FeCo)(10-x)/C catalysts are increased as FeCo compositions increasing. And the further increased FeCo compositions would decrease the performances. That is, the Pd:FeCo = 6:4 is the optimal composition among the various precursor atomic ratios. For the interaction between surface Pd atoms and sub-layer alloyed Fe and Co atoms, the dealloyed Pd-6(FeCo)(4)/C (D-Pd-6(FeCo)(4)/C) catalyst has enhanced electrocatalytic performance. The peak current of D-Pd-6(FeCo)(4)/C is 1.20 times than that of Pd/C in EGOR. And in the chronoamperometric tests, the current decreased rate of D-Pd-6(FeCo)(4)/C is lower than that of Pd/C catalyst. (C) Copyright 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.