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Design of Electrocatalysts for Green Hydrogen Production from Hydrogen Sulfide...
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Design of Electrocatalysts for Green Hydrogen Production from Hydrogen Sulfide and Seawater

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

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 4693

Special Issue Editors

Dr. Dzhamal Uzun

E-Mail Website
Guest Editor
Institute of Electrochemistry and Energy Systems “Acad. E. Budevski” (IEES-BAS), 1113 Sofia, Bulgaria
Interests: hydrogen economy; fuel cells; electrolyzers; electrolysis; electrocatalysis; batteries; electrochemical protection of the environment from pollutants such as H2S, SO2, SO3, NO2, NO3, etc.
Dr. Ivelina Tsacheva

E-Mail Website
Guest Editor
Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, 1113 Sofia, Bulgaria
Interests: synthesis; phosphorus-containing monomers and polymers; polymeric complexes; nanomaterials; microwave assisted synthesis

Special Issue Information

Dear Colleagues,

The material resources from which green hydrogen can be extracted are many, but those of prime importance are water, seawater and hydrogen sulfide.

Catalysts are important for redox reactions in chemical and electrochemical processes. The study of novel catalysts for hydrogen production is very important and a key factor in finding solutions related to clean energy production.

Innovative energy technologies based on hydrogen are critical for a sustainable energy future and environmental protection.

The fabrication of active, stable, cost-effective, and environmentally friendly catalyst materials, for hydrogen production and purification from pollutants (SO2, H2S, CO2, NO2, etc.), will play a significant role in the transition towards renewable energy.

Manuscripts about different methods such as electrocatalytic technologies (electrochemical, thermochemical, etc.), high-temperature co-electrolysis, photo-electrocatalysis, membranes, etc., for hydrogen production from hydrogen sulfide and seawater will be very welcome for publication in this issue.

Submissions to this Special Issue are welcome in the form of original research papers, feasibility studies, and reviews that reflect the state of the research in the field on the synthesis, characterization, and activity analysis of nanostructured materials for applications in different processes and methods for green hydrogen production (from hydrogen sulfide and seawater) and the cleansing of the environment from pollutants. Submissions related to the following are also welcome: fuel cells, seawater desalination utilizing renewable energy, utilizing and management strategies for renewable systems, batteries, hydrogen storage, and hydrogen application.

Dr. Dzhamal Uzun
Dr. Ivelina Tsacheva
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

  • Environmental protection
  • Hydrogen sulfide
  • Sulfur dioxide
  • Electrocatalysts
  • Functional materials
  • Hydrogen energy
  • Black Sea
  • Seawater

Published Papers (2 papers)

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Research

19 pages, 5569 KiB  
Article
Electrocatalysts Based on Novel Carbon Forms for the Oxidation of Sulphite
by George Pchelarov, Dzhamal Uzun, Sasho Vassilev, Elena Razkazova-Velkova, Ognian Dimitrov, Aleksandar Tsanev, Adriana Gigova, Nadezhda Shukova and Konstantin Petrov
Catalysts 2022, 12(1), 93; https://0-doi-org.brum.beds.ac.uk/10.3390/catal12010093 - 14 Jan 2022
Viewed by 1784
Abstract
Described herewith is an electrochemical method to decontaminate sulphur compounds. Studies were carried out of sulphites (SO32−) oxidation on a range of anode catalysts. The electrocatalysts were characterized by scanning electron microscopy, XRD, XPS and BET. Polarization curves were [...] Read more.
Described herewith is an electrochemical method to decontaminate sulphur compounds. Studies were carried out of sulphites (SO32−) oxidation on a range of anode catalysts. The electrocatalysts were characterized by scanning electron microscopy, XRD, XPS and BET. Polarization curves were recorded of electrodes incorporating lyophilized higher fullerenes and manganese oxides. The experiments showed that lyophilized higher fullerenes and C60/C70 fullerene catalysts in conjunction with manganese oxides electrochemically convert sulphites (SO32−) to sulphates (SO42−). The oxidation products do not poison the electrodes. The XPS analysis shows that the catalysts incorporating DWCNTs, MWCNTs and higher fullerenes have a higher concentration of sp3C carbon bonding leading to higher catalytic activity. It is ascertained that higher fullerenes play a major role in the synthesis of more effective catalysts. The electrodes built by incorporating lyophilized catalysts containing higher fullerenes and manganese oxides are shown as most promising in the effective electrochemical decontamination of industrial and natural wastewaters. Full article
(This article belongs to the Special Issue Design of Electrocatalysts for Green Hydrogen Production from Hydrogen Sulfide and Seawater)
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14 pages, 697 KiB  
Article
Performance of Sulfide-Driven Fuel Cell Aerated by Venturi Tube Ejector
by Venko N. Beschkov, Elena N. Razkazova-Velkova, Martin S. Martinov and Stefan M. Stefanov
Catalysts 2021, 11(6), 694; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11060694 - 30 May 2021
Cited by 1 | Viewed by 2000
Abstract
Hydrogen sulfide is frequently met in natural waters, like mineral springs, but mostly it is found in marine water with low renewal rate. The Black Sea has extremely high hydrogen sulfide content. It can be utilized in different ways, but the most promising [...] Read more.
Hydrogen sulfide is frequently met in natural waters, like mineral springs, but mostly it is found in marine water with low renewal rate. The Black Sea has extremely high hydrogen sulfide content. It can be utilized in different ways, but the most promising one is direct conversion into electricity. This result can be attained by a sulfide-driven fuel cell (SDFC), converting sulfide to sulfate thus releasing electric energy up to 24 GJ/t. One of the most important problems is the mass transfer limitation on oxygen transfer in the cathode space of the fuel cell. This problem can be solved using a gas diffusion electrode or highly efficient saturation by oxygen in an ejector of the Venturi tube type. This work presents experimental data in laboratory-scale SDFC for sulfide conversion into sulfate, sulfite and polysulfide releasing different amounts of electric energy. Two types of aeration are tested: direct air blow and Venturi-tube ejector. Besides pure graphite, two catalysts, i.e., cobalt spinel and zirconia-doped graphite were tested as anodes. Experiments were carried out at initial sulfide concentrations from 50 to 300 mg/L. Sulfate, sulfite and thiosulfate ions were detected in the outlet solutions from the fuel cell. The electrochemical results show good agreement with the chemical analyses. Most of the results show attained high efficiencies of the fuel cell, i.e., up to 80%. The practical applications of this method can be extended for other purposes, like treatment of polluted water together with utilization as energy. Full article
(This article belongs to the Special Issue Design of Electrocatalysts for Green Hydrogen Production from Hydrogen Sulfide and Seawater)
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