Generalization of Degradation Mechanisms in Terms of Materials Chemical Nature, Operation Condition and Electrode Reaction Mechanisms

2019 ◽  
Vol 25 (2) ◽  
pp. 401-410 ◽  
Author(s):  
Harumi Yokokawa ◽  
Haruo Kishimoto ◽  
Katsuhiko Yamaji ◽  
Teruhisa Horita
Keyword(s):  
Reaction Mechanisms ◽  
Chemical Nature ◽  
Electrode Reaction ◽  
Degradation Mechanisms ◽  
Operation Condition

Automatically Identifying Electrode Reaction Mechanisms Using Deep Neural Networks

2019 ◽  
Vol 91 (19) ◽  
pp. 12220-12227 ◽  
Author(s):  
Gareth F. Kennedy ◽  
Jie Zhang ◽  
Alan M. Bond
Keyword(s):  
Neural Networks ◽  
Reaction Mechanisms ◽  
Deep Neural Networks ◽  
Electrode Reaction

Rotating disc electrodes: the theory of chronoamperometry and its use in mechanistic investigations

1988 ◽  
Vol 418 (1854) ◽  
pp. 113-154 ◽  
Keyword(s):  
Diffusion Coefficients ◽  
Reaction Mechanisms ◽  
Electrode Reaction ◽  
Rotating Disc ◽  
Potential Step ◽  
Wide Range ◽  
Mechanistic Investigations ◽  
Disc Electrodes ◽  
Theoretical Results ◽  
Computational Strategy

A general computational strategy is presented for the calculation of the chronoamperometric responses arising from potential-step experiments at rotating disc electrodes. The method is applicable to a wide range of electrode reaction mechanisms and theoretical results are given for single- and double-potential-step experiments for ECE, DISP1, DISP2, EC' and CE reactions. For the last, the treatment is extended to cover the case where reactants have grossly unequal diffusion coefficients. Steadystate behaviour is also deduced. The extent to which the various mechanistic pathways can be distinguished is identified and the necessary experiments defined.

Electrode reaction mechanisms of platinum isocyanide complexes in acetonitrile solutions

1988 ◽  
Vol 33 (11) ◽  
pp. 1489-1492 ◽  
Author(s):  
Katsuo Takahashi ◽  
Yasuhiro Yamamoto ◽  
Kiyoshi Matsuda ◽  
Hiroshi Yamazaki
Keyword(s):  
Reaction Mechanisms ◽  
Electrode Reaction ◽  
Acetonitrile Solutions

scholarly journals Progress in Reaction Mechanisms and Reactor Technologies for Thermochemical Recycling of Poly(methyl methacrylate)

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1667 ◽  
Author(s):  
Eli K.C. Moens ◽  
Kyann De Smit ◽  
Yoshi W. Marien ◽  
Alessandro D. Trigilio ◽  
Paul H.M. Van Steenberge ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Reaction Mechanisms ◽  
Structural Defects ◽  
Continuous Reactor ◽  
Average Chain Length ◽  
Chemical Recycling ◽  
Degradation Mechanisms ◽  
Modeling Tools ◽  
Specific Chemical ◽  
Poly Methyl Methacrylate

Chemical or feedstock recycling of poly(methyl methacrylate) (PMMA) by thermal degradation is an important societal challenge to enable polymer circularity. The annual PMMA world production capacity is over 2.4 × 106 tons, but currently only 3.0 × 104 tons are collected and recycled in Europe each year. Despite the rather simple chemical structure of MMA, a debate still exists on the possible PMMA degradation mechanisms and only basic batch and continuous reactor technologies have been developed, without significant knowledge of the decomposition chemistry or the multiphase nature of the reaction mixture. It is demonstrated in this review that it is essential to link PMMA thermochemical recycling with the PMMA synthesis as certain structural defects from the synthesis step are affecting the nature and relevance of the subsequent degradation reaction mechanisms. Here, random fission plays a key role, specifically for PMMA made by anionic polymerization. It is further highlighted that kinetic modeling tools are useful to further unravel the dominant PMMA degradation mechanisms. A novel distinction is made between global conversion or average chain length models, on the one hand, and elementary reaction step-based models on the other hand. It is put forward that only by the dedicated development of the latter models, the temporal evolution of degradation product spectra under specific chemical recycling conditions will become possible, making reactor design no longer an art but a science.

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