Free-Standing Three-Dimensional CuCo2S4 Nanosheet Array with High Catalytic Activity as an Efficient Oxygen Electrode for Lithium–Oxygen Batteries

2019 ◽  
Vol 11 (4) ◽  
pp. 3834-3842 ◽  
Author(s):  
Jianping Long ◽  
Zhiqian Hou ◽  
Chaozhu Shu ◽  
Chao Han ◽  
Weijie Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Three Dimensional ◽  
Oxygen Electrode ◽  
High Catalytic Activity ◽  
Free Standing ◽  
Nanosheet Array ◽  
Lithium Oxygen Batteries

A 3D free-standing Co doped Ni2P nanowire oxygen electrode for stable and long-life lithium–oxygen batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 6785-6794 ◽  
Author(s):  
Zhiqian Hou ◽  
Chaozhu Shu ◽  
Peng Hei ◽  
Tingshuai Yang ◽  
Ruixin Zheng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Electrode ◽  
Effective Strategy ◽  
Free Standing ◽  
Oxygen Electrodes ◽  
Long Life ◽  
Lithium Oxygen Batteries ◽  
Co Doped

Exploring oxygen electrodes with superior bifunctional catalytic activity and suitable architecture is an effective strategy to improve the performance of lithium–oxygen (Li–O2) batteries.

Tuning the electronic band structure of Mott–Schottky heterojunctions modified with surface sulfur vacancy achieves an oxygen electrode with high catalytic activity for lithium–oxygen batteries

2020 ◽  
Vol 8 (22) ◽  
pp. 11337-11345 ◽  
Author(s):  
Ranxi Liang ◽  
Chaozhu Shu ◽  
Anjun Hu ◽  
Chenxi Xu ◽  
Ruixin Zheng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Band Structure ◽  
Electronic Band Structure ◽  
Oxygen Electrode ◽  
High Catalytic Activity ◽  
Sulfur Vacancy ◽  
Electronic Band ◽  
New Type ◽  
Lithium Oxygen Batteries

A new type of surface sulfur-vacancy-modified Ru/ZnIn2S4 Mott–Schottky heterojunctions is elaborately proposed to boost the performance of Li–O2 batteries.

Synergy of polypyrrole and carbon x-aerogel in lithium–oxygen batteries

Nanoscale ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 3753-3758 ◽  
Author(s):  
Christine H. J. Kim ◽  
Chakrapani V. Varanasi ◽  
Jie Liu
Keyword(s):  
Catalytic Activity ◽  
Porous Structure ◽  
High Catalytic Activity ◽  
Crucial Step ◽  
Lithium Oxygen Batteries ◽  
Oxygen Cathode

A crucial step in the development of lithium–oxygen (Li–O2) batteries is to design an oxygen cathode with high catalytic activity and stable porous structure.

Three-Dimensional Periodic Hematite Photocatalysts Fabricating by Direct Writing Method

2014 ◽  
Vol 1025-1026 ◽  
pp. 621-627
Author(s):  
Qin Mei Peng ◽  
Bo Li ◽  
Jin Wang ◽  
Ji Jiao Li ◽  
Ji Zhou
Keyword(s):  
Methylene Blue ◽  
Catalytic Activity ◽  
Organic Contaminants ◽  
Degradation Rate ◽  
Sol Gel ◽  
Three Dimensional ◽  
High Catalytic Activity ◽  
Direct Writing ◽  
Catalytically Active ◽  
Gel Technique

Three-dimensional (3-D) periodic hematite scaffold was successfully fabricated by direct writing method as a catalyst for degradation of organic contaminants. Photo-catalytically active α-Fe2O3 nanoparticles have been synthesized by sol-gel technique. Aqueous slurries of iron oxides were freeform fabricated to produce hematite scaffolds with a 3-D periodic architecture and multiscale porosity. The catalytic activity of the hematite scaffolds was evaluated in the degradation of Methylene Blue (MB). It was found that the degradation rate of MB dye was over 83%. The result strongly indicates that the hematite scaffolds exhibits a high catalytic activity. Moreover, this work provides an important step forward in the creation of suitable structures for photocatalyst.

Effect of Different Iron Sources on In-Situ Growth of Zeolitic Imidazolate Frameworks-8: For Efficient Oxygen Reduction Electrocatalysts

2021 ◽  
Vol 21 (10) ◽  
pp. 5319-5328
Author(s):  
Sha-Sha Luo ◽  
Yu-Meng Ma ◽  
Peng-Wei Li ◽  
Ming-Hua Tian ◽  
Qiao-Xia Li
Keyword(s):  
Catalytic Activity ◽  
High Temperature ◽  
Oxygen Reduction ◽  
High Performance ◽  
Low Cost ◽  
Three Dimensional ◽  
Precious Metals ◽  
High Catalytic Activity ◽  
Zeolitic Imidazolate Frameworks ◽  
Wide Range

Transition metal and nitrogen co-doped carbon-based catalysts (TM-N-C) have become the most promising catalysts for Pt/C due to their wide range of sources, low cost, high catalytic activity, excellent stability and strong resistance to poisoning, especially Fe–N–C metal-organic frameworks (MOFs), which are some of the most promising precursors for the preparation of Fe–N–C catalysts due to their inherent properties, such as their highly ordered three-dimensional framework structure, controlled porosity, and tuneable chemistry. Based on these, in this paper, different iron sources were added to synthesis a sort of zeolitic imidazole frameworks (ZIF-8). Then the imidazole salt in ZIF-8 was rearranged into high N-doped carbon by high-temperature pyrolysis to prepare the Fe–N–C catalyst. We studied the physical characteristics of the catalysts by different iron sources and their effects on the catalytic properties of the oxygen reduction reaction (ORR). From the point of morphology, various iron sources have a positive influence on maintaining the morphology of ZIF-8 polyhedron. Fe–N/C–Fe(NO3)3 has the same anion as zinc nitrate, and can maintain a polyhedral morphology after high-temperature calcination. It had the highest ORR catalytic activity compared to the other four catalyst materials, which proved that there is a certain relationship between morphology and performance. This paper will provide a useful reference and new models for the development of high-performance ORR catalysts without precious metals.

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