Improving electrocatalytic activities of FeCo2O4@FeCo2S4@PPy electrodes by surface/interface regulation

By Depeng Zhao, M. Dai, Yue Zhao, Hengqi Liu, Y. Liu, Xiang Wu. Nano Energy, 2020

176 citations recorded by the source corpus.

Abstract Constructing bi-functional electrocatalysts with multi-active sites is significant to enhance the catalytic performances. However, it is still a large challenge to obtain high efficient catalysts for full water electrolysis. Herein, we design novel sandwich-like FeCo2O4@FeCo2S4@PPy catalysts through a facile preparation strategy. The as-fabricated samples present an excellent electrocatalytic performance with an overpotential of 98.2 mV for HER at −10 mA cm−2, 280 mV for OER and a cell voltage of 1.63 V at 50 mA cm−2. The outstanding performances can be contributed to in-situ electrochemical activation and synergistic effects of electrode materials. It benefits to surface/interface modulation forming active Co and Fe oxyhydroxides in electrochemical reaction process.

Subfields: Electrical and Electronic Engineering, Electrochemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/208d08b15d37da73f8eb0a0aa23687209eaf9a0b