화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.42, No.22, 15044-15053, 2017
Enhanced performance of direct peroxide-peroxide fuel cells by employing three-dimensional Ni and Co@TiC nanoarrays anodes
Thom-like Ni@TiC NAs and flake-like Co@TiC NAs electrodes without any conductive agent and binder are simply fabricated by the potentiostatic electrodeposition of Ni and Co catalysts on the TiC nanowire arrays (NAs). The electrocatalytic activity of H2O2 oxidation on the Ni@TiC NAs electrodes is better than that on the Co@TiC NAs electrodes. The Ni@TiC NAs electrodes demonstrate a rough surface and have many nano-needles on the rod edges, which assures the high utilized efficiency of Ni catalysts. These particular three-dimensional structures may be very suitable for H2O2 electrooxidation. The anodic current of Ni@TiC NAs anode reaches 0.32 A cm(-2) at 0.3 V in 1.0 M H2O2 + 4 M KOH solution. The DPFCs employing Ni TiC NAs anodes display the peak power density of 30.2 mW cm(-2) and open circuit voltage of 0.90 V at 85.1 mA cm(-2) with desirable cell stability at 10 mL min(-1) flow rate and 20 degrees C, which is much higher than those previously reported. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.