A broad parameter range for selective methane production with bicarbonate solution in electrochemical CO2 reduction

2017 ◽  
Vol 1 (8) ◽  
pp. 1734-1739 ◽  
Author(s):  
Hiroshi Hashiba ◽  
Hiroki K. Sato ◽  
Satoshi Yotsuhashi ◽  
Katsushi Fujii ◽  
Masakazu Sugiyama ◽  
...  
Keyword(s):  
Current Density ◽  
Methane Production ◽  
Co2 Reduction ◽  
Parameter Range ◽  
Density Range ◽  
Current Density Range ◽  
Electrochemical Co2 Reduction

Selective methane production was achieved over a broad current density range with 0.5 M KHCO3 solution and bulk, polycrystalline Cu.

Graphene anchored on Cu foam as a lithiophilic 3D current collector for a stable and dendrite-free lithium metal anode

2018 ◽  
Vol 6 (21) ◽  
pp. 9899-9905 ◽  
Author(s):  
Guanhui Yang ◽  
Jiadong Chen ◽  
Peitao Xiao ◽  
Phillips O. Agboola ◽  
Imran Shakir ◽  
...  
Keyword(s):  
Current Density ◽  
Current Collector ◽  
Host Material ◽  
Density Range ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Current Density Range ◽  
Stable Performance ◽  
Cu Foam

GN@Cu foam serves as a lithiophilic host material for Li anode, showing dendrite-free morphology and stable performance over a wide current density range.

scholarly journals Variable-temperature characterization of NbTi strands in the low critical-current density range

2008 ◽  
Vol 97 ◽  
pp. 012306 ◽  
Author(s):  
L Affinito ◽  
S Chiarelli ◽  
V Corato ◽  
A della Corte ◽  
G De Marzi ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Variable Temperature ◽  
Density Range ◽  
Current Density Range

Electrochemical CO2 reduction with low overpotential by a poly(4-vinylpyridine) electrode for application to artificial photosynthesis

2017 ◽  
Vol 198 ◽  
pp. 409-418 ◽  
Author(s):  
Hohyun Jeong ◽  
Myung Jong Kang ◽  
Hyeyeong Jung ◽  
Young Soo Kang
Keyword(s):  
Charge Transfer ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Catalytic Properties ◽  
Co2 Reduction ◽  
Surface Concentration ◽  
Reduction Reaction ◽  
Pt Electrodes ◽  
Electrochemical Co2 Reduction ◽  
Low Overpotential

Pyridine molecules have been used as a catalyst to reduce the activation energy of the CO2 reduction reaction. It has been reported that CO2 is reduced by pyridine catalysts at low overpotential around −0.58 V vs. SCE. Poly(4-vinylpyridine), which has pyridine functional groups shows similar catalytic properties to reduce CO2 at low overpotential like pyridinium catalysts. Different thickness of P(4-VP) coated Pt electrodes were analyzed to determine the catalytic properties for CO2 reduction. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy methods showed the catalytic CO2 reduction properties of a P(4-VP)/Pt electrode. Thin P(4-VP)/Pt film showed a low current density of −0.16 mA cm−2 under CO2 atmosphere and the current density reached −0.45 mA cm−2 with increase of the P(4-VP) thickness. The increase of current density was explained by an increased surface concentration of adsorbed pyridinium groups of the thick P(4-VP) layer. Nyquist plots also showed decrease of impedance with increase of the P(4-VP) layer indicating fast charge transfer between Pt and the P(4-VP) layer due to the increase of hybrid ionic complex formation on the Pt surface. However, charge transfer is restricted when the P(4-VP) layer becomes more thick because of slowed protonation of pyridine groups adjacent to the Pt surface due to the suppressed permeability of electrolyte solution into the PVP membrane. This electrochemical observation provides a new aspect of P(4-VP) polymer for CO2 reduction.

(Invited) A Full Carbon Balance Analysis on High Current Density Electrochemical CO2 Reduction Reactors with Cu Catalysts

2020 ◽  
Vol MA2020-01 (36) ◽  
pp. 1497-1497
Author(s):  
Brian Seger ◽  
Ming Ma ◽  
Ezra L Clark ◽  
Kasper Therkildsen ◽  
Ib Chorkendorff
Keyword(s):  
Current Density ◽  
Carbon Balance ◽  
High Current Density ◽  
Co2 Reduction ◽  
High Current ◽  
Electrochemical Co2 Reduction ◽  
Balance Analysis ◽  
Cu Catalysts

Time Dependent Fluorescence Spectrum of an e-Beam Pumped KrF Laser Medium in a High Current Density Range

1980 ◽  
Vol 19 (5) ◽  
pp. L241-L244 ◽  
Author(s):  
Hideo Hara ◽  
Nobuhiko Umezu ◽  
Kazuko Umezu ◽  
Hiroshi Takuma ◽  
Susumu Namba
Keyword(s):  
Fluorescence Spectrum ◽  
Current Density ◽  
High Current Density ◽  
Time Dependent ◽  
Laser Medium ◽  
Density Range ◽  
High Current ◽  
Current Density Range ◽  
Krf Laser

scholarly journals The estimation of solid copper surface tension in copper sulfate solutions

2002 ◽  
Vol 67 (11) ◽  
pp. 769-775 ◽  
Author(s):  
Konstantin Popov ◽  
Nebojsa Nikolic ◽  
Zlatko Rakocevic
Keyword(s):  
Surface Tension ◽  
Specific Surface ◽  
Copper Sulfate ◽  
Current Density ◽  
Density Range ◽  
Sulfate Solutions ◽  
Current Density Range ◽  
The Difference ◽  
Limiting Diffusion Current ◽  
Solid Copper

In metal electrodeposition in the limiting diffusion current density range the deposition current density remains constant regardless of the deposition overpotential used. At the same time, the larger the deposition overpotential is the more disperse is the formed deposit, which is characterised by an increased specific surface. The difference in the specific surface of disperse deposits obtained at two different overpotentials in the limiting diffusion current density range is correlated with the difference between the deposition overpotentials. A method for the estimation of the surface tension of solid copper in copper sulfate solutions is also proposed.

CATHODIC POLARIZATION OF SILVER IN SULPHURIC ACID

1959 ◽  
Vol 37 (1) ◽  
pp. 222-227 ◽  
Author(s):  
A. A. Antoniou ◽  
F. E. W. Wetmore
Keyword(s):  
Sulphuric Acid ◽  
Current Density ◽  
Cathodic Polarization ◽  
Density Range ◽  
Current Density Range ◽  
Symmetry Factor ◽  
Tafel Slopes ◽  
Silver Cathodes ◽  
Hydrogen Overpotential ◽  
A Current

The hydrogen overpotential on fine silver cathodes has been determined from 2 to 35° and over a current density range from 0.03 to 2000 μa cm−2. Two Tafel slopes were observed, RT/F at low currents, 2RT/F at high currents. The stoichiometric number was found to be one and the symmetry factor one-half at low currents. The heat of activation changed from 18.8 kcal at low currents to 14.3 at high currents.

scholarly journals An Electrodeposition Process for Producing Ductile Bulk Nanocrystalline Ni–Fe Alloys in a Wide Current Density Range

2018 ◽  
Vol 59 (8) ◽  
pp. 1354-1358 ◽  
Author(s):  
Isao Matsui ◽  
Mizuki Kanetake ◽  
Hiroyuki Hosokawa ◽  
Naoki Omura ◽  
Yorinobu Takigawa ◽  
...  
Keyword(s):  
Current Density ◽  
Density Range ◽  
Electrodeposition Process ◽  
Current Density Range ◽  
Fe Alloys ◽  
Bulk Nanocrystalline
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