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
Two-dimensional nanosheets for electrocatalysis in energy generation and conversion
TL;DR: In this article, the authors describe recent advances in nanosheet electrocatalysis of oxygen reduction, oxygen evolution, hydrogen evolution, and CO2 reduction reactions, and find that carbon-free carbon nanosheets outperform classical noble metal catalysts in several of these applications and show high potential in others.
Journal ArticleDOI
Three-Dimensional Hierarchical Architectures Derived from Surface-Mounted Metal-Organic Framework Membranes for Enhanced Electrocatalysis.
TL;DR: A surface-mounted metal-organic framework membrane was pyrolyzed at a range of temperatures to produce catalysts with excellent trifunctional electrocatalytic efficiencies for the oxygen reduction, hydrogen evolution, and oxygen evolution reactions.
Journal ArticleDOI
Metal–Organic Framework-Induced Synthesis of Ultrasmall Encased NiFe Nanoparticles Coupling with Graphene as an Efficient Oxygen Electrode for a Rechargeable Zn–Air Battery
Jianbing Zhu,Meiling Xiao,Yelong Zhang,Zhao Jin,Zhangquan Peng,Changpeng Liu,Shengli Chen,Junjie Ge,Wei Xing +8 more
TL;DR: In this paper, a two-stage encapsulation strategy was proposed to regulate the structure and performance of catalysts with thin graphene nanosheets coupled with full encapsulated ultrafine and high-loaded transition metal nanoparticles (TMs@NCX) for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
Journal ArticleDOI
Construction of a sp 3 /sp 2 Carbon Interface in 3D N-Doped Nanocarbons for the Oxygen Reduction Reaction
Gao Jian,Gao Jian,Yun Wang,Haihua Wu,Xi Liu,Leilei Wang,Qiaolin Yu,Aowen Li,Hong Wang,Chuqiao Song,Zirui Gao,Mi Peng,Mengtao Zhang,Na Ma,Jiaou Wang,Wu Zhou,Guoxiong Wang,Zhen Yin,Ding Ma +18 more
TL;DR: Through tuning both composition and pores, the 3D N-doped nanocarbon with a high ratio of sp3/sp2 on the surface exhibits a superior electrocatalytic performance for ORR than that of the commercial Pt/C in the Zn-air battery.
Journal ArticleDOI
Harnessing the interplay of Fe–Ni atom pairs embedded in nitrogen-doped carbon for bifunctional oxygen electrocatalysis
Xiaofeng Zhu,Detao Zhang,Chih Jung Chen,Qingran Zhang,Ru-Shi Liu,Zhenhai Xia,Liming Dai,Liming Dai,Rose Amal,Xunyu Lu +9 more
TL;DR: In this article, a cost-effective OER/ORR bifunctional catalyst by embedding atomic Fe-Ni dual metal pairs into nitrogen-doped carbon hollow spheres (Fe-NiNC-50) is presented.
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).