期刊
ADVANCED FUNCTIONAL MATERIALS
卷 22, 期 17, 页码 3634-3640出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201200186
关键词
graphene; doping; nanosheets; oxygen reduction reactions; fuel cells
类别
资金
- Max Planck Society
- DFG [SPP 1355, MU 334/32-1, SPP 1459]
- BMBF LiBZ Project
- ESF Project GOSPEL [09-EuroGRAPHENE-FP-001]
- EU Project GENIUS
- ERC
Heteroatom (N or S)-doped graphene with high surface area is successfully synthesized via thermal reaction between graphene oxide and guest gases (NH3 or H2S) on the basis of ultrathin graphene oxide-porous silica sheets at high temperatures. It is found that both N and S-doping can occur at annealing temperatures from 500 to 1000 degrees C to form the different binding configurations at the edges or on the planes of the graphene, such as pyridinic-N, pyrrolic-N, and graphitic-N for N-doped graphene, thiophene-like S, and oxidized S for S-doped graphene. Moreover, the resulting N and S-doped graphene sheets exhibit good electrocatalytic activity, long durability, and high selectivity when they are employed as metal-free catalysts for oxygen reduction reactions. This approach may provide an efficient platform for the synthesis of a series of heteroatom-doped graphenes for different applications.
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