scholarly journals Feasibility study on a high current density, large-scale superconductors by dynamic stabilization. II Stability margin.

1987 ◽  
Vol 22 (3) ◽  
pp. 181-185
Author(s):  
Takeshi OGASAWARA
Keyword(s):  
Feasibility Study ◽  
Current Density ◽  
Large Scale ◽  
High Current Density ◽  
Stability Margin ◽  
Dynamic Stabilization ◽  
High Current

Selective Conversion of Carbon Dioxide to Formate with High Current Densities

2021 ◽  
pp. 2150001
Author(s):  
Xiulin Yang ◽  
Defei Liu ◽  
Shenghong Zhong ◽  
Xiaofeng Zhou ◽  
Kuo-Wei Huang ◽  
...  
Keyword(s):  
Current Density ◽  
Hollow Fiber ◽  
Active Sites ◽  
Large Scale ◽  
High Current Density ◽  
High Current ◽  
Faradaic Efficiency ◽  
Practical Applications ◽  
Selective Conversion ◽  
Current Densities

Selective conversion of CO2 to formate with high current densities is highly desirable but still challenging. Copper hollow fibers with interconnected pore structures were fabricated via a facile method and used as a stand-alone cathode for highly efficient electrochemical reduction of CO2 to formate. Our studies revealed that delivering the reactant CO2 gas to the inner space of the hollow fiber could build up a higher CO2 partial pressure in the pores and presumably reduce the concentration of H[Formula: see text] from the electrolyte to effectively suppress the major competing reaction, hydrogen evolution reaction (HER), from 46.9% faradaic efficiency (FE) to 15.0%. A high selectivity for CO2 reduction to formate with a maximum FE of 77.1% was achieved with a high current density of 34.7[Formula: see text]mA cm[Formula: see text], which is one of the highest FEs on Cu-based materials. Mechanistic studies suggest that the abundant active sites along with the unique crystal facets induced by the high pressure of CO2 at the pore surface in the “gas in” mode are attributed to the superior electroactivity and selectivity for the CO2 reduction to formate. The Cu hollow fiber electrodes exhibit an outstanding long-term stability at high current density, showing great potential for large-scale practical applications.

Large-scale production of low-cost molybdenum dioxide-phosphide seamless electrode for high-current-density hydrogen evolution

2022 ◽  
Author(s):  
Chuanyong Jian ◽  
Qian Cai ◽  
Wenting Hong ◽  
Wei Liu
Keyword(s):  
Hydrogen Evolution ◽  
Current Density ◽  
Large Scale ◽  
High Current Density ◽  
Low Cost ◽  
Scale Production ◽  
High Current ◽  
Molybdenum Dioxide ◽  
Industrial Grade ◽  
Large Scale Production

Herein, we report the large-scale production of a molybdenum oxide-phosphide (MoO2-MoP) seamless electrode (SE) that is vertically grown on cheap industrial-grade molybdenum substrates (e.g. molybdenum plate, molybdenum mesh, or molybdenum...

F, P double-doped Fe3O4 with abundant defect sites for efficient hydrogen evolution at high current density

2021 ◽  
Author(s):  
Xin-Yu Zhang ◽  
Fengting Li ◽  
Ruo-Yao Fan ◽  
Jie Zhao ◽  
Bin Dong ◽  
...  
Keyword(s):  
High Activity ◽  
Current Density ◽  
Large Scale ◽  
High Current Density ◽  
Scale Production ◽  
High Current ◽  
Simple Method ◽  
Large Scale Production ◽  
Defect Sites ◽  
Production Of Hydrogen

Developing of high-activity electrocatalysts that can operate stably at high current density is important but still challenging for large-scale production of hydrogen. Herein, we report a simple method for constructing...

Large scale production of advanced high current density thermionic cathodes

2017 ◽  
Author(s):  
Diana Gamzina ◽  
Michelle Gonzalez ◽  
Gordon E. Soekland ◽  
Neville C. Luhmann ◽  
Colin McElroy ◽  
...  
Keyword(s):  
Current Density ◽  
Large Scale ◽  
High Current Density ◽  
Scale Production ◽  
High Current ◽  
Thermionic Cathodes ◽  
Large Scale Production
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