PatentDOI
Metal-free bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions
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
Citations
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Journal ArticleDOI
Material design and engineering of next-generation flow-battery technologies
TL;DR: In this paper, the authors present a critical overview of recent progress in conventional aqueous redox-flow batteries and next-generation flow batteries, highlighting the latest innovative alternative materials.
Journal ArticleDOI
Efficient Oxygen Reduction Reaction (ORR) Catalysts Based on Single Iron Atoms Dispersed on a Hierarchically Structured Porous Carbon Framework.
TL;DR: In alkaline media, the SA-Fe-HPC catalysts outperform the commercial Pt/C electrode in ORR activity, fuel selectivity, and long-term stability (1 mV negative shift after 3000 potential cycles), and are promising non-platinum-group metal ORR catalysts for fuel-cell technologies.
Journal ArticleDOI
Measurement Techniques for the Study of Thin Film Heterogeneous Water Oxidation Electrocatalysts
Michaela Burke Stevens,Lisa J. Enman,Adam S. Batchellor,Monty R. Cosby,Ashlee E. Vise,Christina D. M. Trang,Shannon W. Boettcher +6 more
TL;DR: In this article, the authors report a series of procedures and measurement techniques that have adopted or developed to assess each of the above challenges in understanding materials for the oxygen evolution reaction (OER).
Journal ArticleDOI
Pyridinic-N-Dominated Doped Defective Graphene as a Superior Oxygen Electrocatalyst for Ultrahigh-Energy-Density Zn–Air Batteries
Qichen Wang,Qichen Wang,Qichen Wang,Yujin Ji,Yongpeng Lei,Yongpeng Lei,Yaobing Wang,Yingde Wang,Youyong Li,Shuangyin Wang +9 more
TL;DR: In this paper, a pyridinic-N-dominated doped graphene with abundant vacancy defects was constructed and the optimized sample with an ultrahigh pore volume (3.43 cm3 g-1) exhibits unprecedented ORR activity with a half-wave potential of 0.28 V for ORR and 0.85 V in alkaline.
Journal ArticleDOI
Texturing in situ: N,S-enriched hierarchically porous carbon as a highly active reversible oxygen electrocatalyst
TL;DR: In this paper, a hierarchical porous and heteroatom doped carbon catalyzer was proposed for a reversible oxygen electrocatalyst for renewable energy conversion and storage technologies, which exhibited outstanding oxygen reduction/evolution activities with a metric potential difference of 0.72 V in 1 M KOH.
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).