Confined space reduced graphite oxide doped with sulfur as metal-free oxygen reduction catalyst |
| |
| Affiliation: | 1. Department of Applied Chemistry, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;2. CITIC Guoan Mengguli Power Sources Technology Co., Ltd., Beijing 102200, China;1. Department of Computer Science, University of Missouri-Columbia, MO 65211, USA;2. Division of Biomedical Informatics, Cincinnati Children’s Hospital Medical Center (CCHMC), Cincinnati, OH 45229, USA;3. Department of Biomedical Informatics, College of Medicine, University of Cincinnati, OH, USA;4. CMUC, Department of Mathematics, University of Coimbra, 3001-501 Coimbra, Portugal;1. Photonic Engineering Group, University of Cantabria, E.T.S.I.I.T. Av. De Los Castros s/n 39005 Santander, Cantabria, Spain;2. PI.T.Knowledge, c/Fandería 2, Barakaldo 48901, Bizkaia, Spain;1. Department of Urology, University of Bern, Inselspital, Bern, Switzerland;2. Department of Radiology, Neuroradiology and Nuclear Medicine, Institute of Diagnostic, Interventional and Pediatric Radiology, University of Bern, Inselspital, Bern, Switzerland;3. Neuro-Urology, Spinal Cord Injury Centre and Research, University of Zurich, Balgrist University Hospital, Zurich, Switzerland |
| |
| Abstract: | Reduced GO in confined space of silica gel nanopores doped with sulfur shows high catalytic activity for oxygen reduction reaction (ORR) in alkaline medium and exhibits a superior tolerance to the presence of methanol. Even though the partially reduced GO with hydroquinone structures is a good catalysts for ORR, it shows instability in KOH. The good performance of S-doped material is linked to the coexistence of sulfur and oxygen on the surface in equal atomic quantities and a unique porosity being the replica of the silica pores. The former leads to the positive charge on the carbon atoms, which are the reaction sites. Hydrophobicity of the surface and small pores enhance adsorption of O2. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
