title: Graphene Quantum Dots Supported by Graphene Nanoribbons with Ultrahigh Electrocatalytic Performance for Oxygen Reduction.
abstract: A new class of oxygen reduction reaction (ORR) catalysts based on graphene quantum dots (GQDs) supported by graphene nanoribbons (GNRs) has been developed through a one-step simultaneous reduction reaction, leading to ultrahigh performance for O reduction with an excellent electrocatalytic activity (higher limiting current density and lower overpotential than those of platinum) and high selectivity and stability in alkaline media comparable to the best C-based ORR catalysts reported so far. Electron microscopy revealed numerous surface/edge defects on the GQD/GNR surfaces and at their interface to act as the active sites. This, coupled with efficient charge transfer between the intimately contacted GQDs and GNRs, rationalized the observed ultrahigh electrocatalytic performance for the resultant GQD-GNR hybrids. Thus, this study opens a new direction for developing low-cost, highly efficient, C-based ORR electrocatalysts.
authors.affiliation: †College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
authors.forename: Huile
authors.initials: H
authors.lastname: Jin
authors.affiliation: †College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
authors.forename: Huihui
authors.initials: H
authors.lastname: Huang
authors.affiliation: †College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
authors.forename: Yuhua
authors.initials: Y
authors.lastname: He
authors.affiliation: †College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Feng
authors.affiliation: †College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.
authors.forename: Shun
authors.initials: S
authors.lastname: Wang
authors.affiliation: ‡Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States.
authors.forename: Liming
authors.initials: L
authors.lastname: Dai
authors.affiliation: †College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China.|§Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
authors.forename: Jichang
authors.initials: J
authors.lastname: Wang