Mechanism and Kinetics of Oxidation Reaction of Aqueous Ti3C2Tx Suspensions at Different pHs and Temperatures

Author(s):  
Sehyun Doo ◽  
Ari Chae ◽  
Daesin Kim ◽  
Taegon Oh ◽  
Tae Yun Ko ◽  
...  
1987 ◽  
Vol 52 (6) ◽  
pp. 1386-1396 ◽  
Author(s):  
Ján Mocák ◽  
Michal Németh ◽  
Mieczyslaw Lapkowski ◽  
Jerzy W. Strojek

A spectrocoulometric macrocell with a direct-view optical probe was designed and constructed, where the optical signal is transferred by light-conducting glass or quartz fibres permitting to work at wavelengths above 410 or 300 nm. The method of measurement on the proposed equipment is described; it was tested in the study of the mechanism and kinetics of oxidation of Fe(bipy)32+ ions (bipy = 2,2'-bipyridyl) with the use of potentiostatic coulometric electrolysis with open-circuit relaxation at a suitable time. The primary product of electrolysis, Fe(bipy)33+, undergoes a follow-up hydrolytic reaction with the formation of a binuclear complex. The rate constant of the reaction of the first order involves the contributions, kBi, from all bases present in solution; the corresponding values for H2O, OH-, bipy, and CH3COO- ions at a ionic strength 0·5 mol dm-3 and 25 °C were determined as kOH = (5·0 ± 0·6) . 105 mol-1 dm3 s-1, kbipy = (1·3 ± 0·2) . 10-1 mol-1 dm3 s-1, kAc = (5·8 ± 1·0) . 10-2 mol-1 dm3 s-1, and kH2O is not significant with respect to experimental errors.


1974 ◽  
pp. 54-59 ◽  
Author(s):  
Kohji KASHIWASE ◽  
Gen-ichi SATO ◽  
Ei-ichi NARITA ◽  
Taijiro OKABE

2012 ◽  
Vol 127 (4) ◽  
pp. 3198-3203 ◽  
Author(s):  
Shijie Xiao ◽  
Weiyu Cao ◽  
Bin Wang ◽  
Lianghua Xu ◽  
Biaohua Chen

2015 ◽  
Vol 98 (7) ◽  
pp. 2205-2213 ◽  
Author(s):  
Robert W. Harrison ◽  
William Edward Lee

2010 ◽  
Vol 146-147 ◽  
pp. 1904-1910
Author(s):  
Qi Zhou ◽  
Jian Gang Jia ◽  
Hong Shun Zhao ◽  
Xin Min Zhang

In the present work, intermetallics Fe3Si and Fe3 (Si1-xAlx) (x=0.33, 0.67, 0.80) produced by arc melting, were evaluated regarding the oxidation at 900°C in air. The test preformed was the isothermal and cyclic oxidation. The microstructures of oxide films were analyzed by XRD, SEM, EDS, EPMA. The result showed that the four kinds of intermetallics had good oxidation resistance at 900°C.The addition of Al element can increase the oxidation resistance of Fe3Si based intermetallics. The oxidation kinetics of the four intermetallics follows the rule of the parabola. The main oxidation product of Fe3Si is SiO2.The kinetics of oxidation reaction is mainly controlled by Si diffusion. The oxidation product of three Al alloying Fe3Si based intermetallics is Al oxide. Al moves outward from the substrate to form a protective oxide film which restrained the diffusion of Si and Fe outward.


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