Chrysanthemum-derived N and S co-doped porous carbon for efficient oxygen reduction reaction and aluminum-air battery. (10th June 2017)

• Record Type: Journal Article
• Authors: Xu, Lina; Fan, Hao; Huang, Lixin; Xia, Jianling; Li, Shouhai; Li, Mei; Ding, Haiyang; Huang, Kun
• Is Part Of: Electrochimica acta. Volume 239(2017)
• Page Start: 1
• Page End: 9
• Publication Date: 2017-06-10
• Subjects: chrysanthemum -- N, S dual-doped porous carbon -- oxygen reduction reaction -- fuel cells -- aluminum-air battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.04.002
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Implementation of cheap and efficient electrocatalysts towards oxygen reduction reaction (ORR) falls in the central focus on fulfilling cost-affordable and high-performance fuel cells and metal-air batteries. In this study, N and S dual-doped porous carbon was prepared by a facile strategy for using tribute chrysanthemum as precursor and zinc chloride as activating agent. The catalyst prepared at 800 °C (NSC800) depicts multiscale porous with large specific surface area (810 m 2 g −1 ) and abundant exposed intrinsic dopants. The electrochemical characterizations exhibit that its onset potential is 0.0966 V versus Hg/HgO electrode, much higher than that of the other reported N, S co-doped carbons, and it also shows the better methanol tolerance, carbon monoxide (CO) poisoning and stability than commercial Pt/C. Consequently, NSC800 catalyst shows attractive properties when used as the air cathode of a home-made primary aluminum-air battery, e.g., an open-circuit potential of ca. 1.64 V, a discharge specific capacity of 288 mAh g −1, and a peak power density of 46 mW cm −2 . Such attractive performances could be mainly attributed to the synergistic effect of exposed intrinsic N and S active sites and increased specific surface area with multiscale porous. Our idea on developing such doped carbons by utilizing extensive intrinsic components of biomass would be a promising strategy to cathode electrocatalyst for fuel cells and metal-air batteries.