PatentDOI
Metal-free bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions
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TLDR
A mesoporous carbon foam co-doped with nitrogen and phosphorus that has a large surface area and good electrocatalytic properties for both ORR and OER and is tested as an air electrode for primary and rechargeable Zn-air batteries.Abstract:
A co-doped carbon material, methods of making such materials, and electrochemical cells and devices comprising such materials are provided. The co-doped carbon material comprises a mesoporous carbon material doped with nitrogen and phoshporous (NPMC). The present NPMC exhibit catalytic activity for both oxygen reduction reaction and oxygen evolution reaction and may be useful as an electrode in an electrochemical cell and particularly as part of a battery. The present NPMC materials may be used as electrodes in primary zinc-air batteries and in rechargeable zinc-air batteries and many other energy systems.read more
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A Generic Conversion Strategy: From 2D Metal Carbides (MxCy) to M-Self-Doped Graphene toward High-Efficiency Energy Applications
TL;DR: In this article, a thermal-chlorination strategy for a universal transformation of abundant 2D metal carbides (MxCy, e.g., Cr3C2, Mo2C, NbC, and VC) to 2D graphene and M-self-doped graphene (MG) was presented.
Journal ArticleDOI
Enhanced Oxygen Evolution Reaction Activity by Encapsulating NiFe Alloy Nanoparticles in Nitrogen-Doped Carbon Nanofibers.
Peng Wei,Xueping Sun,Qirui Liang,Xiaogang Li,Zhimin He,Xiangsheng Hu,Jinxu Zhang,Minhui Wang,Qing Li,Hui Yang,Jiantao Han,Yunhui Huang +11 more
TL;DR: Light is shed on the design and large-scale production of low-cost and high-performance electrocatalysts toward different energy applications in the future and both experimental characterization and density functional theory (DFT) calculations validate that a suitable binary metal ratio can lead to the optimal catalytic activity.
Journal ArticleDOI
Nanostructured Carbon Based Heterogeneous Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media
Chaojun Lei,Siliu Lyu,Jincheng Si,Bin Yang,Zhongjian Li,Lecheng Lei,Zhenhai Wen,Gang Wu,Yang Hou +8 more
TL;DR: In this paper, a review of carbon-based OER catalysts is presented, including single and multi-heteroatom doping and edge-and defect-rich defects, and transition metal and heteroatom co-doped nanocarbons.
Journal ArticleDOI
N2-dopant of graphene with electrochemically switchable bifunctional ORR/OER catalysis for Zn-Air battery
Joonwon Lim,Ji-Won Jung,Na Young Kim,Gil Yong Lee,Ho Jin Lee,Yeunhee Lee,Dong Sung Choi,Ki Ro Yoon,Yong-Hyun Kim,Il-Doo Kim,Sang Ouk Kim +10 more
TL;DR: In this paper, a bifunctional catalytic site of nitrogen pair-doped graphene nanoribbons for precisely switchable oxygen reduction (OER) and ORR was presented.
Journal ArticleDOI
Nitrogen-doped microporous carbon: An efficient oxygen reduction catalyst for Zn-air batteries
TL;DR: N-doped microporous carbon as an exceptional metal-free catalyst from waste biomass (banana peel as representative) was obtained via fast catalysis carbonization, followed by N-doping modification as mentioned in this paper.
References
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Journal ArticleDOI
Electrical Energy Storage for the Grid: A Battery of Choices
TL;DR: The battery systems reviewed here include sodium-sulfur batteries that are commercially available for grid applications, redox-flow batteries that offer low cost, and lithium-ion batteries whose development for commercial electronics and electric vehicles is being applied to grid storage.
Journal ArticleDOI
Origin of the Overpotential for Oxygen Reduction at a Fuel-Cell Cathode
Jens K. Nørskov,Jan Rossmeisl,and Ashildur Logadottir,L. Lindqvist,John R. Kitchin,Thomas Bligaard,Hannes Jónsson +6 more
TL;DR: In this paper, the stability of reaction intermediates of electrochemical processes on the basis of electronic structure calculations was analyzed and a detailed description of the free energy landscape of the electrochemical oxygen reduction reaction over Pt(111) as a function of applied bias was presented.
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
Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces
Isabela C. Man,Hai-Yan Su,Federico Calle-Vallejo,Heine Anton Hansen,José I. Martínez,Nilay İnoğlu,John R. Kitchin,Thomas F. Jaramillo,Jens K. Nørskov,Jan Rossmeisl +9 more
TL;DR: In this article, a large database of HO* and HOO* adsorption energies on oxide surfaces was used to analyze the reaction free energy diagrams of all the oxides in a general way.
Journal ArticleDOI
Sulfur and Nitrogen Dual-Doped Mesoporous Graphene Electrocatalyst for Oxygen Reduction with Synergistically Enhanced Performance†
TL;DR: In this paper, Mesoporous graphene doped with both N and S atoms (N-S-G) was prepared in one step and studied as an electrochemical catalyst for the oxygen reduction reaction (ORR).