scholarly journals Retraction Note to: Self-assembly of N doped 3D porous carbon frameworks from carbon quantum dots and its application for oxygen reduction reaction

2021 ◽  
Author(s):  
Chao Chen ◽  
Zexu Sun ◽  
Yueping Li ◽  
Liyuan Yi ◽  
Haoming Hu
Keyword(s):  
Quantum Dots ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
Self Assembly ◽  
Carbon Quantum Dots ◽  
Reduction Reaction

Carbon Quantum Dots Derived N-Doped Porous Carbon Frameworks with High Electrocatalytic for Oxygen Reduction Reaction

NANO ◽  
2017 ◽  
Vol 12 (08) ◽  
pp. 1750093 ◽  
Author(s):  
Xuelian Li ◽  
Xuming Xue ◽  
Yongsheng Fu
Keyword(s):  
Quantum Dots ◽  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
Carbon Quantum Dots ◽  
Reduction Reaction ◽  
Alkaline Electrolyte ◽  
Metal Free ◽  
Defect Sites

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 800[Formula: see text]C) possesses unique 3D porous framework architecture, large specific surface area (171[Formula: see text]cm2 g[Formula: see text] and abundant defect sites. As a catalyst for ORR, the optimized NCF-800 displays a positive onset potential at 0.87[Formula: see text]V (versus reversible hydrogen electrode), which is roughly 60[Formula: see text]mV more negative than that of Pt/C (0.93[Formula: see text]V). 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.

Cobalt, nitrogen-codoped carbon quantum dots as a synergistic catalyst for oxygen reduction reaction

2015 ◽  
Vol 4 (4) ◽  
Author(s):  
Huihua Wang ◽  
Yanmei Yang ◽  
Tianpeng Qu ◽  
Zhenhui Kang ◽  
Deyong Wang
Keyword(s):  
Quantum Dots ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Solvothermal Method ◽  
Cobalt Acetate ◽  
Carbon Quantum Dots ◽  
Reduction Reaction

AbstractA cobalt/nitrogen/carbon (Co/N/C) electrocatalyst has been successfully synthesized by the solvothermal method using cobalt acetate (Co(Ac)

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