Abstract
The development of robust and efficient trifunctional catalysts showing excellent oxygen evolution reaction (OER), oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) kinetics has been challenging. Herein, we prepared a hybrid iron and cobalt-based metal alloy phosphide on a phosphorus and nitrogen co-doped carbon substrate (FeCo-P/PNC) as a catalyst using a one-step Pregulation method. The catalyst exhibited a positive half-wave potential of 0.86 V versus the reversible hydrogen electrode (RHE) for ORR, and low overpotentials of 350 and 158 mV for OER and HER, respectively, to achieve a current density of 10 mA cm-2. Density functional theory calculations demonstrated the dominant role of P in both FeCo phosphide and carbon matrix, which led to the good ORR, OER and HER kinetics. The assembled aqueous and flexible Zn-air batteries with FeCo-P/PNC as the air cathode displayed excellent peak power densities of 195.1 and 90.8 mW cm–2, respectively, as well as outstanding charging-discharging performance, long lifetime, and high flexibility. Moreover, the self-powered overall water-splitting cell exhibited a low working voltage of 1.71 V to achieve a current density of 10 mA cm-2, confirming its excellent multifunctional OER/ORR/HER activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.