Author
R.E. Sioda
Bio: R.E. Sioda is an academic researcher from Polish Academy of Sciences. The author has contributed to research in topics: Electrolysis & Nitrobenzene. The author has an hindex of 7, co-authored 7 publications receiving 141 citations.
Papers
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TL;DR: In this article, a flow electrolytic cell is described which contains a working electrode composed of a variable number of parallel platinum grids, and the operation of the cell has been checked employing the process of the electroreduction of 2×10−3 M K3Fe(CN)6 in 1 M KCl in water.
32 citations
TL;DR: In this paper, a mathematical model of electrolysis on a porous electrode under condition of flow of the solution has been developed, based on the assumption that the electrode reaction is at equilibrium, and on an earlier postulate concerning the mass transport rate to the internal surface of the porous electrode.
29 citations
TL;DR: In this article, the semi-empirical model of limiting current on flow-through porous electrodes, as described before by Sioda, is compared with the usual presentation of mass transfer processes involving mass transfer coefficients and dimensionless correlations.
27 citations
TL;DR: In this paper, the free radical anions of α- and β-nitronaphthalenes and nitromesitylene were generated by electrolysis in a 0.2 N solution of NaNO 3 in dimethylformamide.
24 citations
TL;DR: In this article, the free radical anions of nitrosobenzene form primarily in the first reduction wave and react with formation of azoxybenzenes as a final product.
15 citations
Cited by
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TL;DR: In this paper, cyclic voltammetry in the room temperature ionic liquid 1-butyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide [C 4 dmim][N(Tf) 2 ] on a gold microelectrode was used to study the reduction of nitrobenzene and 4-nitrophenol.
109 citations
101 citations
TL;DR: Many different palladium-based catalytic systems have been reported for the carbonylation reactions of organic nitro compounds to isocyanates, carbamates and ureas as mentioned in this paper.
Abstract: Many different palladium-based catalytic systems have been reported for the carbonylation reactions of organic nitro compounds to isocyanates, carbamates and ureas. Almost all of these can be roughly divided into three groups: (i) those containing a second (or even a third) metal (usually a Lewis acid or a metal oxo compound or both), (ii) those in which phenanthroline or similar chelating nitrogen ligands are used and (iii) those in which monodentate phosphines are employed as ligands. The systems in which chelating phosphines are used as ligands lie in between the last two groups. The reaction mechanisms for the catalytic systems in each group appear to be related. Most of the information available does not derive from strictly mechanistic studies, but rather from synthetic studies and it is here critically analysed and compared with the information obtained from other related fields.
64 citations
TL;DR: O'Neill et al. as mentioned in this paper investigated membraneless electrochemical flow cells for hydrogen production from water electrolysis that are based on angled mesh flow-through electrodes, which can be fabricated with as few as three parts (anode, cathode, and cell body), reflecting their simplicity and potential for low-cost manufacture.
Abstract: Ion-conducting membranes are essential components in many electrochemical devices, but they often add substantial cost, limit performance, and are susceptible to degradation. This work investigates membraneless electrochemical flow cells for hydrogen production from water electrolysis that are based on angled mesh flow-through electrodes. These devices can be fabricated with as few as three parts (anode, cathode, and cell body), reflecting their simplicity and potential for low-cost manufacture. 3D printing was used to fabricate prototype electrolyzers that were demonstrated to be electrolyte agnostic, modular, and capable of operating with minimal product crossover. Prototype electrolyzers operating in acidic and alkaline solutions achieved electrolysis efficiencies of 61.9% and 72.5%, respectively, (based on the higher heating value of H2) when operated at 100 mA cm−2. Product crossover was investigated using in situ electrochemical sensors, in situ imaging, and by gas chromatography (GC). GC analysis found that 2.8% of the H2 crossed over from the cathode to the anode stream under electrolysis at 100 mA cm−2 and fluid velocity of 26.5 cm s−1. Additionally, modularity was demonstrated with a three-cell stack, and high-speed video measurements tracking bubble evolution from electrode surfaces provide valuable insight for the further optimization of electrolyzer design and performance. © The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. [DOI: 10.1149/2.0021611jes] All rights reserved.
62 citations
61 citations