PatentDOI
Metal-free bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions
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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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Yolk-shell N/P/B ternary-doped biocarbon derived from yeast cells for enhanced oxygen reduction reaction
TL;DR: In this article, a yolk-shell N/P/B ternary-doped biocarbon has been fabricated via a facile and low-cost biosynthesis method using yeast cells as precursor.
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Carbon-Supported Oxygen Vacancy-Rich Co3O4 for Robust Photocatalytic H2O2 Production via Coupled Water Oxidation and Oxygen Reduction Reaction
TL;DR: In this paper, a photocatalytic H2O2 production is proposed as a promising strategy to alleviate energy crisis, since H 2O2 is an important liquidus chemical and fuel.
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Polyaniline Cryogels Supported with Poly(vinyl alcohol): Soft and Conducting
Jaroslav Stejskal,Patrycja Bober,Miroslava Trchová,Adriana Kovalcik,Jiří Hodan,Jiřina Hromádková,Jan Prokeš +6 more
TL;DR: In this article, the authors reported the single-step preparation of soft macroporous conducting cryogels, a special type of hydrogels, by the oxidation of aniline hydrochloride in frozen reaction mixtures in ice, containing a supporting polymer, poly(vinyl alcohol).
Journal ArticleDOI
Energy density-enhancement mechanism and design principles for heteroatom-doped carbon supercapacitors
TL;DR: In this paper, a new approach and design principle to enhance the energy density have been developed with the density functional theory methods, which reveal that compared with pure carbon, the energy densities could be enhanced significantly via heteroatom-doping.
Journal ArticleDOI
Cobalt-vanadium bimetal-based nanoplates for efficient overall water splitting
Yinglu Xiao,Chungui Tian,Mei Tian,Aiping Wu,Haijing Yan,Congfang Chen,Lei Wang,Yanqing Jiao,Honggang Fu +8 more
TL;DR: In this paper, the authors reported the synthesis of cobalt-vanadium (Co-V) bimetal-based catalysts for the effective water splitting, which could be used as active hydrogen evolution reaction and oxygen evolution reaction (OER) catalyst by regulating their structure.
References
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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).