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چکیده
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The rational design of high performance oxygen reduction reaction (ORR) catalysts based on metal chalcogenides derived carbon materials with stable porous structure and rapid electron/mass transport properties is highly desirable yet a great challenge to date. Herein, we synthesize and design metal–organic framework-derived CoNi-P nanoparticles confined into a flexible carbon nanofiber skeleton (C@CoNi-P@C) as ORR catalysts with excellent activity. Using electrospinning of nano size bimetallic NiCo-MOF particles, followed by a precisely controlled annealing process at PH3 atmosphere, composite C@CoNi-P@C catalysts with uniform fiber morphology can be obtained. By comparing the catalytic performance with pure CNF, it is found that the C@CoNi-P@C mixture can be better for the ORR catalyst. With these favorable features, C@CoNi-P@C exhibits an overall distinguished ORR performance in alkaline media, which has a high onset potential of 0.83 V (vs. RHE), half-wave potential of 0.73 V (vs. RHE) and electron transfer number (4). This work introduces a new concept for design of new electrocatalysts using the electrospinning technique for energy storage and conversion application.
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