Highly Selective Two-Electron Oxygen Reduction Catalyzed by Mesoporous Nitrogen-Doped Carbon

High Resolution Image Download MS PowerPoint Slide Electrochemical reduction of oxygen molecules can produce H 2 O 2, which is an important chemical for a green and sustainable society; therefore, the development of catalysts for this reaction is necessary. We propose mesoporous nitrogen-doped carbon prepared from (1-methyl-1H-pyrrole-2-yl)methanol in the presence of a mesoporous SiO 2 template (KIT-6). The nitrogen content of the resulting carbon can be controlled in the range of 0–10 at. % and all prepared samples have well-ordered mesopores with diameters of 3.4–4.0 nm. Electrochemical studies indicate the present materials have high catalytic activities with high selectivity toward H 2 O 2 over 90%. Such high selectivity toward H 2 O 2 is probably due to good mass transport in the catalyst layer, which is enhanced by the mesoporous structure.