Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 871, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159566
Keywords
Co/N-doped carbon; Carbon nanotubes; Porous carbon; Oxygen reduction reaction
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Funding
- National Natural Science Foundation of China [21975151]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JM-086]
- Scientific Research Foundation of Shaanxi Normal University [GK201704004]
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This study introduces a low-cost and effective method to produce Co/N-CNT/PCS catalysts, which exhibit excellent ORR electrocatalytic activity, long-term stability, and potential as a major contender in the field of PEMFCs.
The development of high performance and low-cost non-precious metal catalysts (NPMCs) for the oxygen reduction reaction (ORR) to replace platinum-based catalysts is significant in facilitating the commercialization of proton exchange membrance fuel cells (PEMFCs). In this work, a low-cost and effective approach is employed for producing Co/N-doped carbon nanotubes/porous carbon sheets (Co/N-CNT/PCS) catalysts by one-pot annealing of Co salt, melamine and polyvinylpyrrolidone (PVP). The prepared catalysts exhibit a N-doped carbon nanotubes-grafted porous carbon sheets structure, in which Co nanoparticles (Co NPs) encapsulated in bamboo-like CNTs. When compared with a commercial platinum carbon (Pt/C) catalyst in an alkaline solution, one such catalyst (Co/N-CNT/PCS800) displays comparable ORR electrocatalytic activity as well as improved long-team stability and methanol tolerance, arising from the combined effect of high specific surface area, large pore volume and the cooperation of pyridinic-N and graphitic-N. Moreover, given the scalability and economy of this synthesis, Co/N-CNT/PCS catalysts produced in this way are likely to emerge as a major contender as an ORR catalysts in PEMFCs. (C) 2021 Elsevier B.V. All rights reserved.
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