Abstract
The development of high-performance, low-price and durable doped carbon-based materials as multifunctional oxygen reduction reaction and oxygen evolution reaction catalysts is of great significance for the sustainable energy conversion devices. Adopting zinc zeolitic imidazolate framework and graphitic carbon nitride as nitrogen-sources and templates, we herein design a facile route to fabricate an oxygen (6.11%) functionalized and heavy nitrogen (23.54%) doped porous carbon (NOC-800) with high graphitization degree, high surface area and total pore volume. Electrochemical measurements indicate that as-obtained NOC-800 sample has satisfactory multifunctional oxygen-involving electrocatalytic properties in alkaline media, showing an onset and half-wave potential of −0.141 and −0.249 V vs. Ag/AgCl for oxygen reduction and an overpotential of 377 and 448 mV at 10 and 50 mA cm−2 for electrocatalytic oxygen evolution, respectively, even comparable to commercial RuO2 catalyst and majority of present mainstream metal-free catalysts. Moreover, the desirable stability of NOC-800 catalyst for both oxygen reduction and oxygen evolution reaction is also demonstrated. Combined with the analysis and discussion of the physicochemical characterization and electrochemical measurements, it is proposed and highlighted that oxygen functional groups introduced into nitrogen-doped carbon profitably contributes to high-efficiency overall oxygen-involving electrocatalytic activities.
Published Version
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.