Journal ArticleDOI
Monodisperse cobalt sulfides embedded within nitrogen-doped carbon nanoflakes: an efficient and stable electrocatalyst for the oxygen reduction reaction
TLDR
In this paper, the authors reported the designed synthesis of Co9S8 and nitrogen doped hollow carbon sphere composites by carbonization of metanilic anions within the confinement of two-dimensional galleries of hollow spherical cobalt-aluminum layered double hydroxides.Abstract:
Unique hollow hybrid structures composed of well-dispersed catalyst nanoparticles embedded in a carbon matrix offer great advantages for constructing advanced supported catalysts. Herein, we report the designed synthesis of Co9S8 and nitrogen doped hollow carbon sphere (Co9S8/NHCS) composites by carbonization of metanilic anions within the confinement of two-dimensional galleries of hollow spherical cobalt–aluminum layered double hydroxides. The Co9S8/NHCS composites are composed of numerous porous carbon nanoflakes, and monodisperse Co9S8 nanoparticles are embedded within the carbon nanoflakes. Electrochemical measurements show that the Co9S8/NHCS catalysts prepared at 900 °C exhibit superior oxygen reduction reaction (ORR) activity, resulting in the highest ORR performance to date among all transition metal sulfide-based ORR catalysts in both alkaline and acidic electrolytes. This interlayer confined reaction approach may provide an efficient platform for the synthesis of other functional materials for alternative applications.read more
Citations
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Journal ArticleDOI
Monodisperse Co 9 S 8 nanoparticles in situ embedded within N, S-codoped honeycomb-structured porous carbon for bifunctional oxygen electrocatalyst in a rechargeable Zn-air battery
TL;DR: Cao et al. as mentioned in this paper synthesized Co9S8/N, S-codoped honeycomb-structured porous carbon (Co9S 8/NSC) in situ composites via a simple method.
Journal ArticleDOI
Boosting Oxygen Reduction Catalysis with N-doped Carbon Coated Co9S8 Microtubes.
TL;DR: The electrochemical results demonstrate that the coordination of the N-doped carbon layer, exposed (022) plane, and hollow architecture of Co9S8 microtubes calcined at 700 °C affords outstanding ORR performance to Co 9S8@N-C microt tubes.
Journal ArticleDOI
Recent Advances on Self-Supported Arrayed Bifunctional Oxygen Electrocatalysts for Flexible Solid-State Zn-Air Batteries.
TL;DR: In this review, recent advances on the application of nanoarrayed electrocatalysts as air cathodes in flexible Zn-air batteries are reviewed and various types of bifunctional oxygen electrocatalyst arrays, including carbonaceous material arrays, transition metal compound arrays,Transition metal/carbon arrays, Transition metal compound/ carbon arrays, and other hybrid arrays, are discussed.
Journal ArticleDOI
Cobalt Sulfide Nanowires Core Encapsulated by a N, S Codoped Graphitic Carbon Shell for Efficient Oxygen Reduction Reaction.
TL;DR: This strategy can offer inspiration for designing and fabricating novel core-shell-structured nanomaterials with active sites derived from uniform morphology as potential electrocatalysts for various vital renewable energy devices.
Journal ArticleDOI
Hierarchical Co9S8@Carbon Hollow Microspheres as an Anode for Sodium Ion Batteries with Ultralong Cycling Stability
Mengmeng Yin,Xueting Feng,Dan Zhao,Yun Zhao,Hansheng Li,Wei Zhou,Hongbo Liu,Xiaoping Bai,Hongxia Wang,Caihong Feng,Qingze Jiao +10 more
TL;DR: In this paper, hierarchical Co9S8@carbon hollow microspheres (Co9S 8@CHSs) were designed and facilely prepared via a simple solvothermal approach, following a thermal treatment process.
References
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Journal ArticleDOI
Nitrogen-doped carbon nanotube arrays with high electrocatalytic activity for oxygen reduction.
TL;DR: It is reported that vertically aligned nitrogen-containing carbon nanotubes (VA-NCNTs) can act as a metal-free electrode with a much better electrocatalytic activity, long-term operation stability, and tolerance to crossover effect than platinum for oxygen reduction in alkaline fuel cells.
Journal ArticleDOI
High-Performance Electrocatalysts for Oxygen Reduction Derived from Polyaniline, Iron, and Cobalt
TL;DR: A family of non–precious metal catalysts that approach the performance of platinum-based systems at a cost sustainable for high-power fuel cell applications, possibly including automotive power.
Journal Article
High-Performance Electrocatalysts for Oxygen Reduction Derived from Polyaniline, Iron, and Cobalt
TL;DR: In this article, a family of non-precious metal catalysts that approach the performance of platinum-based systems at a cost sustainable for high-power fuel cell applications, possibly including automotive power.
Journal ArticleDOI
An oxygen reduction electrocatalyst based on carbon nanotube–graphene complexes
Yanguang Li,Wu Zhou,Wu Zhou,Hailiang Wang,Liming Xie,Yongye Liang,Fei Wei,Juan Carlos Idrobo,Juan Carlos Idrobo,Stephen J. Pennycook,Stephen J. Pennycook,Hongjie Dai +11 more
TL;DR: It is shown that few-walled carbon nanotubes, following outer wall exfoliation via oxidation and high-temperature reaction with ammonia, can act as an oxygen reduction reaction electrocatalyst in both acidic and alkaline solutions.
Journal ArticleDOI
Heteroatom-doped graphene materials: syntheses, properties and applications
TL;DR: The distinct properties resulting from various dopants, different doping levels and configurations, and synergistic effects from co-dopants are emphasized, hoping to assist a better understanding of doped graphene materials.