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The Intersection of Electrochemistry Methodology and Electrochemical Reactivity

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Electrochemistry".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 1649

Special Issue Editor


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Guest Editor
Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
Interests: electrochemistry; organic synthesis; catalysis; NMR hyperpolarisation; functional molecules; reaction development; sustainability

Special Issue Information

Dear Colleagues,

The use of electrochemistry as a method for chemical synthesis has expanded rapidly, with the technique being increasingly adopted by synthetic, analytical, and process chemists alike. An understanding of the mechanism of these redox processes has allowed for a new synthetic methodology through the ability to harness electrochemically initiated reagents or reactive species. Together with this diversity of chemical transformations, there has been increased development and innovation in electrochemical reactors and processes, with the goal to achieve reproducibility, automation, and safety, or to engage otherwise inaccessible chemical intermediates.

This Special Issue aims to highlight these links between methodology (be it synthetic methodology through reaction development or process methodology through reactor design) and reactivity (the elucidation and application of unique reaction mechanism or electrochemical properties, to develop novel electrosynthetic processes or fundamental chemical knowledge). We are pleased to invite expert researchers in all areas of electrochemical synthesis to submit their most recent developments and findings in the form of articles or reviews.

Dr. Philip Norcott
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • synthesis
  • green chemistry
  • reactive intermediates
  • single electron oxidation and reduction
  • radical-cations and radical-anions
  • reaction development
  • electrosynthesis
  • batch and flow reactors

Published Papers (1 paper)

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Research

14 pages, 4150 KiB  
Article
Experimental Study on Electrochemical Desulfurization of Coal Liquefaction Residue
by Jianming Fan, Yongfeng Zhang, Na Li, Ruzhan Bai, Qi Liu and Xing Zhou
Molecules 2023, 28(6), 2749; https://doi.org/10.3390/molecules28062749 - 18 Mar 2023
Viewed by 1437
Abstract
The occurrence of sulfur in coal direct liquefaction residue affects its further high quality and high value utilization. Electrochemical desulfurization is characterized by mild reaction conditions, simple operation, easy separation of sulfur conversion products and little influence on the properties of the liquefied [...] Read more.
The occurrence of sulfur in coal direct liquefaction residue affects its further high quality and high value utilization. Electrochemical desulfurization is characterized by mild reaction conditions, simple operation, easy separation of sulfur conversion products and little influence on the properties of the liquefied residue. An anodic electrolytic oxidation desulphurization experiment was carried out on the liquefaction residue of the by-product of a coal-to-liquid enterprise in the slurry state. An electrochemical test and material characterization of raw materials before and after electrolysis showed that electrolytic oxidation can desulfurize the liquefaction residue under an alkaline condition. Linear sweep voltammetry (LSV) was used for the electrolysis experiments to obtain the optimal slurry concentration of 60 g/L. On this basis, the reaction kinetics were calculated, and the minimum activation energy in the interval at 0.9 (V vs. Hg/HgO) was 19.71 kJ/mol. The relationship between the electrolytic desulfurization of the liquefied residue and energy consumption was studied by the potentiostatic method. The influence of anodic potential and electrolytic temperature on the current density, cell voltage, desulfurization rate and energy consumption was investigated. The experimental results showed that the desulfurization rate and total energy consumption increase positively with the increase in reaction temperature and electrolytic potential in a certain range. The influence of the reaction temperature on the desulfurization rate and total energy consumption is more prominent than that of electrolytic potential, but the energy consumption of sulfur removal per unit mass does not show a positive correlation. Therefore, with the energy consumption per unit mass of sulfur removal as the efficiency index, the optimal experimental results were obtained: under the conditions of 0.8 (V vs. Hg/HgO) anode potential, 50 °C electrolytic temperature, 60 g/L slurry concentration and 14,400 s electrolytic time, the desulfurization rate was 18.85%, and the power consumption per unit mass of sulfur removal was 5585.74 W·s/g. The results of XPS, SEM, BET and IC showed that both inorganic and organic sulfur were removed by electrolytic oxidation, and the morphology, pore structure and chemical bond of the liquefied residue were affected by electrolytic oxidation. The research method provides a new idea and reference for the efficiency evaluation of desulfurization and hydrogen production from coal liquefaction residue. Full article
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