Promotion of hydrogen evolution catalysis by ordered hierarchically porous electrodes

2021 ◽  
Author(s):  
Yihuan Yu ◽  
Pengdong Liu ◽  
Meiling Dou ◽  
Jin Niu ◽  
Zhengping Zhang ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Hydrogen Evolution ◽  
Porous Electrodes ◽  
High Current ◽  
Hierarchically Porous ◽  
Current Densities ◽  
And Diffusion

Ru-Based ordered hierarchically porous electrodes promote fast mass transfer and diffusion for hydrogen evolution under high current densities.

scholarly journals Facile Fabrication of Robust Hydrogen Evolution Electrodes under High Current Densities via Pt@Cu Interactions

2021 ◽  
pp. 2105579
Author(s):  
Yeshu Tan ◽  
Ruikuan Xie ◽  
Siyu Zhao ◽  
Xuekun Lu ◽  
Longxiang Liu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Current ◽  
Facile Fabrication ◽  
Current Densities

An Investigation of Electrolytic Jet Polishing at High Current Densities

1963 ◽  
Vol 85 (4) ◽  
pp. 395-401 ◽  
Author(s):  
Reno R. Cole ◽  
Yoram Hopenfeld
Keyword(s):  
Mass Transfer ◽  
Flow Rate ◽  
Mathematical Analysis ◽  
High Current ◽  
Electrolyte Flow ◽  
Current Densities ◽  
Relationship Of ◽  
The Relationship ◽  
Modified Theory ◽  
Fundamental Mass

A method of polishing metals by means of an electrolytic jet at extremely high current densities (to 1750 amps per sq in.) is described. Data are presented on the relation of polishing effect on various metals to current density and electrolyte flow rate for several electrolytes. An experimental method is described whereby the relationship of the above factors can be determined. It was found that all metals investigated could be polished at high enough current densities. Previous theories of electrolytic polishing are discussed and shown to not fully account for the process investigated. A modified theory to account for polishing at the high current densities observed is presented and is supported by mathematical analysis based on fundamental mass transfer considerations.

Selective Loading of Atomic Platinum on a RuCeO x Support Enables Stable Hydrogen Evolution at High Current Densities

2020 ◽  
Vol 59 (46) ◽  
pp. 20423-20427 ◽  
Author(s):  
Tongtong Liu ◽  
Wenbin Gao ◽  
Qiqi Wang ◽  
Meiling Dou ◽  
Zhengping Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Current ◽  
Current Densities

Improving electrocatalytic activity of iridium for hydrogen evolution at high current densities above 1000 mA cm−2

2019 ◽  
Vol 258 ◽  
pp. 117965 ◽  
Author(s):  
Peng Jiang ◽  
Hao Huang ◽  
Jiefeng Diao ◽  
Shipeng Gong ◽  
Shi Chen ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Electrocatalytic Activity ◽  
High Current ◽  
Current Densities

In situ construction of Ni enriched porous NiAl as long-lived electrode for hydrogen evolution at high current densities

2019 ◽  
Vol 489 ◽  
pp. 435-445 ◽  
Author(s):  
Jingtao Zhang ◽  
Zhen Zhang ◽  
Yuanjun Yao ◽  
Xinzhou Ma ◽  
Yibin Yang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Current ◽  
Current Densities

scholarly journals Effect of electrolysis parameters on the morphologies of copper powder obtained at high current densities

2012 ◽  
Vol 77 (5) ◽  
pp. 651-665 ◽  
Author(s):  
Gökhan Orhan ◽  
Güzey Gezgin
Keyword(s):  
Hydrogen Evolution ◽  
Apparent Density ◽  
Copper Ion ◽  
Ion Concentration ◽  
High Rate ◽  
High Current ◽  
Electrolyte Temperature ◽  
Ion Concentrations ◽  
Copper Powders ◽  
Current Densities

The effects of copper ion concentrations and electrolyte temperature on the morphologies and on the apparent densities of electrolytic copper powders at high current densities under galvanostatic regime were examined. These parameters were evaluated by the current efficiency of hydrogen evolution. In addition, scanning electron microscopy was used for analyzing the morphology of the copper powders. It was found that the morphology was dependent over the copper ion concentration and electrolyte temperature under same current density (CD) conditions. At 150 mA cm-2 and the potential of 1000?20 mV (vs. SCE), porous and disperse copper powders were obtained at low concentrations of Cu ions (0.120 M Cu2+ in 0.50 M H2SO4). Under this condition, high rate of hydrogen evolution reaction took place parallel to copper electrodeposition. The morphology was changed from porous, disperse and cauliflower-like to coral-like, shrub-like and stalk-stock like morphology with the increasing of Cu ion concentrations towards 0.120 M, 0.155 M, 0.315 M, 0.475 M and 0.630 M Cu2+ in 0.5 M H2SO4 respectively at the same CD. Similarly, as the temperature was increased, powder morphology and apparent density were observed to be changed. The apparent density values of copper powders were found to be suitable for many of the powder metallurgy applications.

Selective Loading of Atomic Platinum on a RuCeO x Support Enables Stable Hydrogen Evolution at High Current Densities

2020 ◽  
Vol 132 (46) ◽  
pp. 20603-20607
Author(s):  
Tongtong Liu ◽  
Wenbin Gao ◽  
Qiqi Wang ◽  
Meiling Dou ◽  
Zhengping Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Current ◽  
Current Densities
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