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- Title
Carbon Quantum Dots Derived N-Doped Porous Carbon Frameworks with High Electrocatalytic for Oxygen Reduction Reaction.
- Authors
Li, Xuelian; Xue, Xuming; Fu, Yongsheng
- Abstract
Developing low-cost, high-performance metal-free oxygen reduction reaction (ORR) catalysts for fuel cells is highly desirable but still full of challenges. In this study, nitrogen-doped three-dimensional (3D) porous carbon frameworks (NCFs) derived from zero-dimensional carbon quantum dots have been prepared by a simple one-step self-assembly technique. The resultant NCF-800 (carbonized at 800C) possesses unique 3D porous framework architecture, large specific surface area (171cm2 g and abundant defect sites. As a catalyst for ORR, the optimized NCF-800 displays a positive onset potential at 0.87V (versus reversible hydrogen electrode), which is roughly 60mV more negative than that of Pt/C (0.93V). Additionally, the NCF-800 exhibits long-term stability and strong endurance to methanol in alkaline electrolyte, which is much superior to those of Pt/C. Considering the outstanding activity of NCF-800, it can be worked as a prospective metal-free ORR catalyst for fuel cells in the future. Nitrogen-doped three-dimensional (3D) porous carbon frameworks (NCFs) derived from zero-dimensional carbon quantum dots (CQDs) have been prepared by a simple one-step self-assembly technique. The resultant NCF-800 possesses unique 3D porous framework architecture, large specific surface area (171cm2 g and abundant defect sites, which can be worked as a prospective metal-free ORR catalyst for fuel cells.
- Subjects
ELECTROCATALYSTS; QUANTUM dots; NITROGEN; CARBON foams; OXYGEN reduction; FUEL cells
- Publication
NANO, 2017, Vol 12, Issue 8, p-1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S179329201750093X