A Metal–organic Framework Derived PtCo/C Electrocatalyst for Ethanol Electro-Oxidation

Currently, designing and preparing low-cost and high-efficiency electrocatalysts still remains of huge impediment for direct ethanol fuel cells (DEFC5). In this work, by leveraging the unique superiority of Co-3[Co(CN)(6)](2) (Prussian blue analogues, PBA) precursor, we used Pt4+ to replace partial dispersed Co2+ in Co-3(Co(CN)(6)](2) and a metal-organic framework (MOF) derived PtCo electrocatalyst (MD-PtCo/C) was successfully fabricated. Notably, as-obtained MD-PtCo/C (Pt, 0.9532 wt.%) electrocatalyst achieves high utilization rate of ultra-low Pt load and exhibits favorable electrocatalytic performance with lower onset potential, higher FOR activity, less activation energy (E-a) value and better stability compared to commercial Pt/C for ethanol oxidation reaction (EOR). Moreover, the consequence of concentrations (ICON, C2H5OH) and temperatures on electrocatalytic activity of FOR have also been studied. This study would be supportive of developing highly active and low-cost electrocatalysts for other catalytic applications. (C) 2019 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.