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
Carbon Defect Characterization of Nitrogen-Doped Reduced Graphene Oxide Electrocatalysts for the Two-Electron Oxygen Reduction Reaction
Hyo Won Kim,Hun Park,Ji Soo Roh,Jae Eun Shin,Tae Hoon Lee,Liang Zhang,Young Hoon Cho,Hee Wook Yoon,Vanessa J. Bukas,Vanessa J. Bukas,Jinghua Guo,Ho Bum Park,Tae Hee Han,Bryan D. McCloskey +13 more
TL;DR: In this article, modified-carbon catalysts have been developed for the direct synthesis of hydrogen peroxide through electrochemical oxygen reduction, but given the complex structure of most porous ca...
Journal ArticleDOI
Facile Synthesis of Defect-Rich and S/N Co-Doped Graphene-Like Carbon Nanosheets as an Efficient Electrocatalyst for Primary and All-Solid-State Zn–Air Batteries
Jian Zhang,Huang Zhou,Jiawei Zhu,Pei Hu,Chao Hang,Jinlong Yang,Tao Peng,Shichun Mu,Yunhui Huang +8 more
TL;DR: The present work provides a facile but cost-efficient strategy toward preparation of graphene-based materials, but also inspires an idea for promoting the electrocatalytic activity of carbon- based materials.
Journal ArticleDOI
Noble-metal-free electrospun nanomaterials as electrocatalysts for oxygen reduction reaction
Zhaoquan Xu,Haitao Zhao,Jie Liang,Yan Wang,Tingshuai Li,Yongsong Luo,Xifeng Shi,Siyu Lu,Zhe-sheng Feng,Qi Wu,Xuping Sun +10 more
TL;DR: In this paper, a review of noble-metal-free elelctrospun nanomaterials as effective ORR electrocatalysts is presented, and the future perspectives, challenges and research directions of electrospun nano-materials for promoting ORR Electrocatalysis are discussed.
Journal ArticleDOI
Nitrogen and sulfur co-doped porous carbon sheets for energy storage and pH-universal oxygen reduction reaction
TL;DR: In this article, metal-free nitrogen and sulfur co-doped porous carbon sheet (NSPCS) was designed in order to integrate the two reported routes of enhancing the electrocatalytic activity of graphene.
Journal ArticleDOI
Tunable porous carbon spheres for high-performance rechargeable batteries
TL;DR: In this paper, the authors provide an overview for understanding the development of porous carbon spheres and strategies to overcome obstacles, such as low specific capacity, unsatisfactory coulombic efficiency, low tap density and inferior rate performance for their use in rechargeable batteries.
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).