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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Fe, Co bimetal activated N-doped graphitic carbon layers as noble metal-free electrocatalysts for high-performance oxygen reduction reaction
TL;DR: In this paper, a novel catalyst in form of Fe, Co bimetallic alloy activated N-doped graphitic carbon layers (NC/Fe10-xCox) without metal core is rationally fabricated through a simple pyrolysis method and applied for efficient oxygen reduction reaction (ORR) catalysis.
Journal ArticleDOI
Trifunctional Fishbone-like PtCo/Ir Enables High-Performance Zinc–Air Batteries to Drive the Water-Splitting Catalysis
Yingjun Sun,Bolong Huang,Yingjie Li,Yi Xing,Mingchuan Luo,Na Li,Zhonghong Xia,Yingnan Qin,Dong Su,Lei Wang,Shaojun Guo +10 more
TL;DR: In this article, the geometric and electronic structure of Pt- or Ir-based nanomaterials is tuned for the development of highly efficient catalysts for the hydrogen evolution reaction (HER), oxy...
Journal ArticleDOI
Tunable Bifunctional Activity of MnxCo3−xO4 Nanocrystals Decorated on Carbon Nanotubes for Oxygen Electrocatalysis
Tingting Zhao,Srinivas Gadipelli,Guanjie He,Matthew J. Ward,David Do,Peng Zhang,Zhengxiao Guo +6 more
TL;DR: The comprehensive development of manganese cobalt oxide/nitrogen‐doped multiwalled carbon nanotube hybrids is reported for highly reversible oxygen reduction and evolution reactions (ORR and OER, respectively) and it is clear that the long‐term electrochemical activities can be ensured by rational design of hybrid structures from the nanoscale.
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Hard-template synthesis of three-dimensional interconnected carbon networks: Rational design, hybridization and energy-related applications
TL;DR: In this article, the authors summarized the recent progress in the approaches to constructing 3D interconnected carbon networks by using hard templates including metals, inorganic non-metals, etc., and introduced composites based on 3DCNs with multi-dimensional reinforcements, such as 0D nanoparticles, 1D nanotubes/nanofibers, and 2D nanosheets.
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Functionalized carbon nanotubes and graphene-based materials for energy storage
TL;DR: An overview of the recent progress in the functionalization of CNTs and graphene-based materials for energy storage applications in supercapacitors and batteries, along with challenges and perspectives in this exciting field is presented.
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).