Journal
ENERGY
Volume 162, Issue -, Pages 453-459Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2018.07.175
Keywords
Electrocatalyst; Oxygen reduction reaction; Aluminum-air battery; Biomass; Porous carbon materials
Categories
Funding
- National Natural Science Foundation of China [51605188, 51605187, 21673098, 21471067]
- Jilin Provincial Science & Technology Department [20170520088JH]
- Program for JLU Science and Technology Innovative Research Team
- Jilin Province [SXGJQY2017-1, SXGJSF2017-2]
- JLU [SXGJQY2017-1, SXGJSF2017-2]
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Development of convenient, economic and large scale catalysts for oxygen reduction reaction (ORR) in alkaline medium is of great significance to practical applications of aluminum-air batteries. Herein, a corn-stover-derived, nitrogen and cobalt co-doped porous biocarbon material has been prepared and utilized as ORR catalysts in aluminum-air batteries. The resultant product (NCAC-Co) exhibits an interconnected hierarchical porous structure with a high specific surface area (1877.3 m(2) g(-1)). The electrocatalytic characterization of NCAC-Co reveals a half-wave potential (0.743 V vs. RHE) only slightly lower than that of commercial Pt/C (0.793 V vs. RHE) in alkaline medium. Moreover, NCAC-Co also demonstrates the mechanism of 4-electron oxygen reduction (n = 3.87) and outstanding durability. The excellent ORR performance of NCAC-Co can be attributed to the presence of pyridinic N, graphitic N and Co nanoparticles as well as the interconnected hierarchical porous structure. More importantly, NCAC-Co also delivers a good behavior when applied in aluminum-air batteries. The work presented herein shows the NCAC-Co derived from corn stover holds good promise to be an alternative of economic and large scale catalysts for metal-air batteries. (C) 2018 Elsevier Ltd. All rights reserved.
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