Fluorine and nitrogen co-doped ordered mesoporous carbon as a metal-free electrocatalyst for oxygen reduction reaction. Issue 83 (23rd August 2016)

• Record Type: Journal Article
• Authors: Wang, Haiwen; Ding, Junjie; Zhang, Jiao; Wang, Chenfei; Yang, Wenlong; Ren, Hongxin; Kong, Aiguo
• Is Part Of: RSC advances. Volume 6:Issue 83(2016)
• Page Start: 79928
• Page End: 79933
• Publication Date: 2016-08-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra14748h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : FN-OMC with high surface area, ordered mesoporous channels and appropriate graphitization degree of pore walls is successfully synthesized. Abstract : Fluorine and nitrogen co-doped ordered mesoporous carbon (FN-OMC) is synthesized by a hard template method employing inexpensive resorcin as a carbon precursor and ammonium fluoride as a fluorine and nitrogen source. Considerable fluorine and nitrogen atoms (F: 0.35 at%, N: 2.25 at%) are homogeneously implanted in the graphitic carbon matrix with high surface area (671.3 cm 2 g −1 ) and ordered mesoporous channels (6.2 nm). The FN-OMC prepared at the optimized heat-treatment temperature (1000 °C) exhibits a high catalytic activity ( E onset : −0.07 V, E 1/2 : −0.19 V, current density: 5.83 mA cm −2 ) for oxygen reduction reaction (ORR) comparable to commercial platinum–carbon (Pt–C, 20 wt%) catalysts, but better stability and methanol-tolerance in alkaline solutions. The synergistic effect of fluorine and nitrogen atoms in carbon frameworks is demonstrated to sharply polarize adjacent carbon atoms and facilitate the formation of defect-induced active sites for ORR.