Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 4, Pages 4463-4472Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b18454
Keywords
oxygen reduction; graphitic carbon nitride; bamboo; carbon nanotubes; Co nanoparticles
Funding
- National Natural Science Foundation of China [21675147, 21974097, 21802003]
- Jilin Provincial Science and Technology Development Program [20190201242JC]
- Science and Technology Bureau of Jiangmen [2019030102360012639]
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The oxygen reduction reaction (ORR) is an extremely important reaction in many renewable energy-related devices. The sluggish kinetics of the ORR limits the development of many fuel cells. Design and synthesis of highly efficient nonprecious electrocatalysts are of vital importance for electrochemical reduction of oxygen. Herein, we develop a graphitic carbon nitride (g-C3N4)-derived bamboo-like carbon nanotubes/carbon-wrapped Co nanoparticles (BCNT/Co) electrocatalyst by a simple high-temperature pyrolysis and acid-leaching method. The catalytic performance of the as-designed electrocatalyst toward ORR outperforms the commercial Pt/C catalyst in alkaline solution. The onset potential of nonprecious BCNT/Co-800 catalyst was 1.12 V. The half-wave potential was 0.881 V. The result was superior to that of commercial Pt/C (0.827 V vs RHE). The Co nanoparticles, bamboo-like carbon nanotubes, defects, and Co-N-x active sites all result in the remarkable ORR activity, stability, and great methanol tolerance.
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