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hydrogen
Monte carlo simulation of hydrogen adsorption on Ni surfaces
      
In the present paper the adsorption kinetics of the hydrogen molecule on the (111) and (100) surfaces have been studied with the model proposed by Panczyk and the grand canonical Monte Carlo simulation method.
      
The oxidant was a 30 wt-% aqueous solution of hydrogen peroxide.
      
In addition, the effects of activated carbon dosage, formic acid concentration, initial concentration of hydrogen peroxide, initial concentration of DBT and reaction temperature on the oxidation of DBT were investigated.
      
The concentration of formic acid, activated carbon dosage, initial concentration of hydrogen peroxide and reaction temperature affect the oxidative removal of DBT.
      
The asymmetric transfer hydrogenations of prochiral acetophenone and 4-methyl-2-pentanone to corresponding chiral alcohols were carried out on Fe-CS/SBA-15 at atmosphere pressure using 2-propanol as hydrogen donor.
      
Over this promising catalyst, the conversion of m-dinitrobenzene and the yield of m-phenylenediamine could reach 97.0% and 93.1%, respectively, under proper reaction conditions of hydrogen pressure 2.6 MPa, temperature 373 K, and reaction time 1 h.
      
The assynthesized samples were found to be an efficient catalyst for the hydroxylation of benzene which was carried out in a mixed solvent of acetonitrile and acetic acid with aqueous hydrogen peroxide as oxidant.
      
A titania nanorod filmwas synthesized by direct oxidation of metallic Ti with hydrogen peroxide solution under a low temperature.
      
Carbon nanotube (CNT) films were grown on nickel foil substrates by thermal chemical vapor deposition (CVD) with acetylene and hydrogen as the precursors.
      
The results showed that AZ31B alloy has a proper degradation rate and much lower hydrogen release in Hank's solution, with a degradation rate of about 0.3 mm/year and hydrogen release below 0.15 mL/cm2.
      
Effect of hydrogen on stress corrosion cracking of copper
      
The effects of hydrogen on electrochemical behavior and susceptibility of stress corrosion cracking (SCC) of pure copper were studied.
      
SCC susceptibility of pure copper in a 1 M NaNO2 solution was increased by pre-charged hydrogen.
      
The effect of hydrogen on the susceptibility is more obvious in the low stress region due to the longer fracture time, which resulted in a longer time for more hydrogen to diffuse toward the crack tip.
      
Synergistic effects of hydrogen and stress on corrosion and SCC processes were discussed.
      
The results showed that an interaction between stress and hydrogen at the crack tip could increase the anodic dissolution rate remarkably.
      
No hydrogen-bonded urea carbonyl available in the spectra at the beginning.
      
Besides precursors, methane as the carbon source and hydrogen as the ablation, oxygen or H2O was alternatively inlet into the reactive chamber at the pressure of 0.05 MPa.
      
While for the other one, 2,7,12-tertriazine-5,5',10,10',15,15'-hexatetradecyltruxene (tertriazine-truxene-C14) form the intermolecular multi-hydrogen bonds.
      
 

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