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Catalysts
Special Issues
Advances in Applied Electrocatalysis
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Advances in Applied Electrocatalysis

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Electrocatalysis".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 3514

Special Issue Editors

Dr. Charles E. Creissen

E-Mail Website
Guest Editor
College de France, Paris, Île-de-France, France
Interests: electrochemistry; artificial photosynthesis; CO2 reduction
Dr. Souvik Roy

E-Mail Website
Guest Editor
School of Chemistry, University of Lincoln, Lincoln LN6 7DL, UK
Interests: molecular catalysis; electrochemistry; metal-organic Frameworks; CO2 reduction

Special Issue Information

Dear Colleagues,

The electrochemical conversion of H2O and CO2 into value-added products offers a sustainable alternative to fossil-derived chemicals and fuels. Research into molecular and heterogeneous catalysts for such reactions has advanced our understanding of the processes that govern efficiency, selectivity, and current density. Demonstrations incorporating these catalysts in electrochemical cells are required to establish catalytic properties, and also enable determination of the optimal conditions and techniques for real-world devices.

This Special Issue aims to cover advances in applied electrochemistry with molecular and heterogeneous catalysts for water oxidation, organic electro-oxidation, hydrogen evolution, and CO2 reduction. We invite authors to contribute to this issue with not only examples of new catalyst design, but also research involving device engineering, reaction conditions, computational studies, and characterization techniques that will assist the practical integration of electrocatalytic devices in future work.

Dr. Charles E. Creissen
Dr. Souvik Roy
Guest Editors

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. Catalysts is an international peer-reviewed open access monthly 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

  • Electrocatalysis
  • CO2 reduction
  • Hydrogen evolution
  • Water oxidation
  • Organic electro-oxidation
  • Energy storage
  • Molecular electrocatalyst
  • Heterogeneous electrocatalyst

Published Papers (1 paper)

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Research

19 pages, 10033 KiB  
Article
The Role of Redox Potential and Molecular Structure of Co(II)-Polypyridine Complexes on the Molecular Catalysis of CO2 Reduction
by Juan Pablo F. Rebolledo-Chávez, Gionnany Teodoro Toral, Vanesa Ramírez-Delgado, Yolanda Reyes-Vidal, Martha L. Jiménez-González, Marisela Cruz-Ramírez, Angel Mendoza and Luis Ortiz-Frade
Catalysts 2021, 11(8), 948; https://doi.org/10.3390/catal11080948 - 8 Aug 2021
Cited by 3 | Viewed by 3012
Abstract
In this work, we report the electrochemical response of a family of Co(II) complexes, [CoII(L)3]2+ and [CoII(L’)2]2+ (L = 2,2’-bipyridine, 1,10-phenanthroline, 3,4,7,8-tetramethyl-1,10-phenanthroline, 5,6-dimethyl-1,10-phenanthroline, and 4,7-diphenyl-1,10-phenanthroline; L’ = terpyridine and 4-chloro-terpyridine), in the presence [...] Read more.
In this work, we report the electrochemical response of a family of Co(II) complexes, [CoII(L)3]2+ and [CoII(L’)2]2+ (L = 2,2’-bipyridine, 1,10-phenanthroline, 3,4,7,8-tetramethyl-1,10-phenanthroline, 5,6-dimethyl-1,10-phenanthroline, and 4,7-diphenyl-1,10-phenanthroline; L’ = terpyridine and 4-chloro-terpyridine), in the presence and absence of CO2 in order to understand the role of the redox potential and molecular structure on the molecular catalysis of CO2 reduction. The tris chelate complexes exhibited three electron transfer processes [CoII(L)3]2+ ⇄ [CoIII(L)3]3+ + 1e−, [CoΙΙ(L)3]2++1e− ⇄ [CoΙ(L)3]+, and [CoΙ(L)3]+ + 2e- ⇄ [CoΙ(L)(L−)2]−. In the case of complexes with 1,10-phen and 2,2-bipy, the third redox process showed a coupled chemical reaction [CoΙ(L)(L−)2]− → [CoΙ(L−)2]− + L. For bis chelate complexes, three electron transfer processes associated with the redox couples [CoΙΙ(L)2]/[CoIII(L)2]3+, [CoΙΙ(L)2]2+/[CoΙ(L)2]+, and [CoΙ(L)2]+/[CoΙ(L)(L−)] were registered, including a coupled chemical reaction only for the complex containing the ligand 4-chloro-terpyridine. Foot to the wave analysis (FOWA) obtained from cyclic voltammetry experiments allowed us to calculate the catalytic rate constant (k) for the molecular catalysis of CO2 reduction. The complex [Co(3,4,7,8-tm-1,10-phen)3]2+ presented a high k value; moreover, the complex [Co(4-Cl-terpy)3]2+ did not show catalytic activity, indicating that the more negative redox potential and the absence of the coupled chemical reaction increased the molecular catalysis. Density functional theory (DFT) calculations for compounds and CO2 were obtained to rationalize the effect of electronic structure on the catalytic rate constant (k) of CO2 reduction. Full article
(This article belongs to the Special Issue Advances in Applied Electrocatalysis)
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