Mechanism of electro-catalytic oxidation of shikimic acid on Cu electrode based on in situ FTIRS and theoretical calculations

2011 ◽  
Vol 58 ◽  
pp. 165-171 ◽  
Author(s):  
Le-Xing You ◽  
Yi-Min Fang ◽  
Jun-Wei Guo ◽  
Le Zhang ◽  
Jin-Shui Chen ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Shikimic Acid ◽  
Theoretical Calculations ◽  
In Situ Ftirs ◽  
Electro Catalytic Oxidation

In-situ SERS of Formic Acid Electro-catalytic Oxidation on Aucore@Ptshell/Pt Electrode

2008 ◽  
Vol 24 (02) ◽  
pp. 345-349 ◽  
Author(s):  
RAO Gui-Shi ◽  
◽  
◽  
FAN Feng-Ru ◽  
WANG Guo-Fu ◽  
...  
Keyword(s):  
Formic Acid ◽  
Catalytic Oxidation ◽  
Pt Electrode ◽  
Electro Catalytic Oxidation

In situ growth of nickel selenide nanowire arrays on nickel foil for methanol electro-oxidation in alkaline media

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87051-87054 ◽  
Author(s):  
Qiong Luo ◽  
Mingying Peng ◽  
Xuping Sun ◽  
Abdullah M. Asiri
Keyword(s):  
Catalytic Oxidation ◽  
Nickel Foil ◽  
Nanowire Arrays ◽  
Alkaline Media ◽  
In Situ Growth ◽  
Oxidation Of Methanol ◽  
Electro Oxidation ◽  
Electro Catalytic Oxidation

NiSe nanowire arrays solvothermally grown on nickel foil behave as an efficient 3D anode for electro-catalytic oxidation of methanol in alkaline media with strong durability.

scholarly journals The influence of physical state on shikimic acid ozonolysis: a case for in situ microspectroscopy

2014 ◽  
Vol 14 (19) ◽  
pp. 10761-10772 ◽  
Author(s):  
S. S. Steimer ◽  
M. Lampimäki ◽  
E. Coz ◽  
G. Grzinic ◽  
M. Ammann
Keyword(s):  
Degradation Rate ◽  
Shikimic Acid ◽  
Bulk Material ◽  
Water Mixture ◽  
Gas Uptake ◽  
X Ray ◽  
Scanning Transmission ◽  
Dry Conditions ◽  
Semi Solid

Abstract. Atmospheric soluble organic aerosol material can become solid or semi-solid. Due to increasing viscosity and decreasing diffusivity, this can impact important processes such as gas uptake and reactivity within aerosols containing such substances. This work explores the dependence of shikimic acid ozonolysis on humidity and thereby viscosity. Shikimic acid, a proxy for oxygenated reactive organic material, reacts with O3 in a Criegee-type reaction. We used an environmental microreactor embedded in a scanning transmission X-ray microscope (STXM) to probe this oxidation process. This technique facilitates in situ measurements with single micron-sized particles and allows to obtain near-edge X-ray absorption fine structure (NEXAFS) spectra with high spatial resolution. Thus, the chemical evolution of the interior of the particles can be followed under reaction conditions. The experiments show that the overall degradation rate of shikimic acid is depending on the relative humidity in a way that is controlled by the decreasing diffusivity of ozone with decreasing humidity. This decreasing diffusivity is most likely linked to the increasing viscosity of the shikimic acid–water mixture. The degradation rate was also depending on particle size, most congruent with a reacto-diffusion limited kinetic case where the reaction progresses only in a shallow layer within the bulk. No gradient in the shikimic acid concentration was observed within the bulk material at any humidity indicating that the diffusivity of shikimic acid is still high enough to allow its equilibration throughout the particles on the timescale of hours at higher humidity and that the thickness of the oxidized layer under dry conditions, where the particles are solid, is beyond the resolution of STXM.

Study on the Electrochemical Behavior of Ferric Stearate and its Electro-Catalytic Oxidation of Hydrogen Peroxide

2009 ◽  
Vol 610-613 ◽  
pp. 161-164
Author(s):  
Li Li Liang ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Hydrogen Peroxide ◽  
Cyclic Voltammetry ◽  
Catalytic Oxidation ◽  
Tin Oxide ◽  
Electrochemical Behavior ◽  
Doctor Blade ◽  
Conductive Glass ◽  
Oxidation Of Hydrogen ◽  
Electro Catalytic Oxidation ◽  
Catalytic Effects

A ferric stearate electrode was made by doctor-blade methods using the Fluorine tin oxide (FTO) conductive glass. The electrochemical behavior of ferric stearate electrode was studied by the cyclic voltammetry. The electro-catalytic effects of ferric stearate on H2O2 were also investigated by cyclic voltammetry.

scholarly journals Phase Formation during Solidification of Mg-Nd-Zn Alloys: An In Situ Synchrotron Radiation Diffraction Study

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1637 ◽  
Author(s):  
Domonkos Tolnai ◽  
Tungky Subroto ◽  
Serge Gavras ◽  
Ricardo Buzolin ◽  
Andreas Stark ◽  
...  
Keyword(s):  
Rare Earth ◽  
Synchrotron Radiation ◽  
Diffraction Study ◽  
Phase Formation ◽  
Theoretical Calculations ◽  
Alloy System ◽  
Zn Addition ◽  
Synchrotron Radiation Diffraction ◽  
Zn Alloys

Mg-4Nd base alloys with Zn additions of 3, 5 and 8 wt % were investigated with in situ synchrotron radiation diffraction during solidification. This method enabled the investigation of phase formation and transformation in the alloys. The diffraction results were supported with TEM observations on the as-solidified samples. The results show the effect of increased Zn addition on stabilizing the Mg3RE phase (RE—rare earth). The experimental results agree only partially with the theoretical calculations indicating the need to improve the existing thermodynamic database on the alloy system.

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