Abstract
The development of efficient, stable and low-cost electrocatalysts towards the seawater oxidation is highly desirable for hydrogen-based industries. In this work, we report the efficient preparation of phosphate-decorated hierarchical porous CoNiFe medium-entropy alloys as promising electrocatalysts for the oxygen evolution reaction in seawater via the solution combustion synthesis. The hierarchical porous structure of CoNiFe medium-entropy alloys enhances exposure to catalytic sites and facilitates the efficient diffusion of gas products as well as electrolytes. Moreover, the in-situ formed PO43− anions not only improve the electrocatalytic performance of CoNiFe medium-entropy alloys for oxygen evolution reaction, but also prevent Cl− from contacting the catalytic sites. Thanks to these structural benefits, the optimized CoNiFeP0.1@NF electrode demonstrates superior electrocatalytic performance for oxygen evolution reaction, showing an overpotential of 250 mV at 10 mA cm−2, a low Tafel slope of 47.6 mV dec−1, and satisfactory stability in the 1.0 M KOH +0.5 M NaCl electrolyte.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
