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
Tubular assemblies of N-doped carbon nanotubes loaded with NiFe alloy nanoparticles as efficient bifunctional catalysts for rechargeable zinc-air batteries.
TL;DR: The remarkable bifunctional performance of TA-NiFe@NCNT can be attributed to the excellent OER and ORR activities of NiFe alloy nanoparticles and NCNTs, respectively, as well as the high porosity and excellent conductivity of the electrocatalyst that benefitted mass and electron transfer processes, respectively.
Journal ArticleDOI
In situ growth of cobalt sulfide hollow nanospheres embedded in nitrogen and sulfur co-doped graphene nanoholes as a highly active electrocatalyst for oxygen reduction and evolution
TL;DR: In this article, a new type of bifunctional catalyst was designed by embedding cobalt sulfide hollow nanospheres in nitrogen and sulfur co-doped graphene nanoholes via a simple, one-pot pyrolysis method.
Journal ArticleDOI
Hierarchical Mesoporous NiO/MnO2@PANI Core-Shell Microspheres, Highly Efficient and Stable Bifunctional Electrocatalysts for Oxygen Evolution and Reduction Reactions.
Junkai He,Mingchao Wang,Mingchao Wang,Wenbo Wang,Wenbo Wang,Ran Miao,Wei Zhong,Sheng-Yu Chen,Shannon Poges,Tahereh Jafari,Wenqiao Song,Jiachen Liu,Steven L. Suib +12 more
TL;DR: The new facile synthesis of mesoporous NiO/MnO2 in one step by modifying inverse micelle templated UCT methods opens a new avenue for the rational design of core-shell structure catalysts for energy conversion and storage applications.
Journal ArticleDOI
Carbon cloth supported cobalt phosphide as multifunctional catalysts for efficient overall water splitting and zinc–air batteries
TL;DR: A self-standing CoP@CC electrocatalyst that presents superior HER performance in both acid and alkaline media and excellent OER activity in an alkaline environment is synthesized via a simple electrochemical deposition followed by subsequent phosphorization.
Journal ArticleDOI
Nanocarbon-intercalated and Fe–N-codoped graphene as a highly active noble-metal-free bifunctional electrocatalyst for oxygen reduction and evolution
Daping He,Daping He,Daping He,Yuli Xiong,Jinlong Yang,Xu Chen,Zhaoxiang Deng,Mu Pan,Yadong Li,Yadong Li,Shichun Mu +10 more
TL;DR: In this article, the authors reported a rationally designed electrocatalyst with high activity for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) based on a nanocarbon-intercalated graphene (CIG) material doped with nitrogen (N) and iron (Fe) (Fe-N-CIG).
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).