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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Journal ArticleDOI
2D Dual‐Metal Zeolitic‐Imidazolate‐Framework‐(ZIF)‐Derived Bifunctional Air Electrodes with Ultrahigh Electrochemical Properties for Rechargeable Zinc–Air Batteries
Tingting Wang,Zongkui Kou,Shichun Mu,Jingping Liu,Daping He,Ibrahim Saana Amiinu,Wen Meng,Kui Zhou,Zhixiong Luo,Somboon Chaemchuen,Francis Verpoort +10 more
Journal ArticleDOI
Microporous Framework Induced Synthesis of Single-Atom Dispersed Fe-N-C Acidic ORR Catalyst and Its in Situ Reduced Fe-N4 Active Site Identification Revealed by X-ray Absorption Spectroscopy
Meiling Xiao,Jianbing Zhu,Liang Ma,Zhao Jin,Junjie Ge,Xin Deng,Yang Hou,Qinggang He,Jingkun Li,Qingying Jia,Sanjeev Mukerjee,Ruoou Yang,Zheng Jiang,Dang Sheng Su,Changpeng Liu,Wei Xing +15 more
TL;DR: In this paper, a microporous metal-organic-framework-confined strategy toward the preferable formation of single-atom dispersed catalysts is presented, where a high-spin Fe3+-N4 configuration is revealed by the 57Fe Mossbauer spectrum and X-ray absorption spectroscopy for Fe L-edge.
Journal ArticleDOI
Recent advances in three-dimensional graphene based materials for catalysis applications
TL;DR: This comprehensive review describes some important recent advances with respect to 3DGMs, including their preparation methods, characterization and applications inCatalysis, e.g., photocatalysis, electrocatalysis, organic catalysis, and CO oxidation.
Journal ArticleDOI
Carbon Nanosheets Containing Discrete Co-Nx-By-C Active Sites for Efficient Oxygen Electrocatalysis and Rechargeable Zn–Air Batteries
Yingying Guo,Pengfei Yuan,Jianan Zhang,Yongfeng Hu,Ibrahim Saana Amiinu,Xin Wang,Jigang Zhou,Huicong Xia,Zhibo Song,Qun Xu,Shichun Mu +10 more
TL;DR: DFT calculations demonstrated that the coupling of Co-Nx active sites with B atoms prefers to adsorb an O2 molecule in side-on mode and accelerates ORR kinetics, which shows superior performance with an open-circuit potential of ∼1.4 V, a peak power density of ∼100.4 mW cm-2, and excellent durability.
Journal ArticleDOI
Polymer-Derived Heteroatom-Doped Porous Carbon Materials.
Hong Wang,Yue Shao,Shilin Mei,Yan Lu,Yan Lu,Miao Zhang,Jian-Ke Sun,Jian-Ke Sun,Krzysztof Matyjaszewski,Markus Antonietti,Jiayin Yuan +10 more
TL;DR: This Review comprehensively surveys the progress in polymer-derived functional HPCMs in terms of how to produce and control their porosities, heteroatom doping effects, and morphologies and their related use and provides perspective on how to predefine the structures of HPC Ms by using polymers to realize their potential applications in the current fields of energy generation/conversion and environmental remediation.
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).