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Advanced Fuel Cells: Design, Synthesis and Photoelectrocatalyst Applications

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Prof. Dr. Vitali A. Grinberg

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Guest Editor

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia
Interests: nanoscale catalysts; fuel cells; redox chemistry; solar energy materials; thin films for nanotechnology and photoelectrocatalytic degradation of pollutants

Dr. Alexander Modestov

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Guest Editor

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow 119071, Russia
Interests: fuel cells; electrocatalysis; redox flow batteries; chemical power sources; corrosion
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Special Issue Information

Dear Colleagues,

This Special Issue entitled "Advances in the Field of Advanced Fuel Cells: Design, Synthesis, Photoelectrocatalysts Application" aims to combine a group of articles devoted to the most important areas in the development and synthesis of new catalytic materials for low-temperature fuel cells and photoelectrocatalysis. The design includes theoretical and experimental research targeted at the creation of active sites on catalysts’ surfaces for electro-oxidation reactions as well as catalysts for oxygen reduction. In this Special Issue, attention will be paid both to fundamental and practical approaches to the synthesis of efficient electrocatalysts for fuel cell reactions, including hydrogen oxidation reactions (HOR), methanol oxidation reactions (MOR), ethanol oxidation reactions (EOR), and oxygen reduction reactions (ORR). Effluents of a variety of industries usually contain harmful organic compounds. This Special Issue will include research on the photocatalytic degradation of organic pollutants and photo- and photoelectrocatalytic CO₂ capture. Works on photoelectrocatalysis for hydrogen production through the decomposition of water are welcome. Particular attention will be paid to the development of new promising methods for the synthesis of active, stable, and selective nanocomposite materials both for fuel cells and for photoelectrochemical processes involving organic substances.

Prof. Dr. Vitali A. Grinberg
Dr. Alexander D. Modestov
Guest Editors

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Keywords

design
electrocatalyst
photoelectrocatalyst
fuel cells
hydrogen oxidation reaction
methanol oxidation reactions
oxygen reduction reactions
CO₂ capture
degradation of organic pollutants

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17 pages, 5169 KiB

Open AccessArticle

Photoelectrocatalytic Activity of ZnO-Modified Hematite Films in the Reaction of Alcohol Degradation

by Vitali A. Grinberg, Victor V. Emets, Natalia A. Mayorova, Aleksey A. Averin and Andrei A. Shiryaev

Int. J. Mol. Sci. 2023, 24(18), 14046; https://doi.org/10.3390/ijms241814046 - 13 Sep 2023

Cited by 1 | Viewed by 712

Abstract

Thin-film nanocrystalline hematite electrodes were fabricated by electrochemical deposition and loaded with electrodeposited zinc oxide in various amounts. Under visible light illumination, these electrodes demonstrate high activity in the photoelectrochemical degradation of methanol, ethylene glycol and, in particular, glycerol. Results of intensity-modulated photocurrent spectroscopy show that the photoelectrocatalysis efficiency is explained by the suppression of the electron–hole pair recombination and an increase in the rate of photo-induced charge transfer. Thus, zinc oxide can be considered an effective modifying additive for hematite photoanodes. Full article

(This article belongs to the Special Issue Advanced Fuel Cells: Design, Synthesis and Photoelectrocatalyst Applications)

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12 pages, 4974 KiB

Open AccessArticle

Regulation of Bimetallic Coordination Centers in MOF Catalyst for Electrochemical CO₂ Reduction to Formate

by Rui Yang, Qun Huang, Xuelan Sha, Beibei Gao and Juan Peng

Int. J. Mol. Sci. 2023, 24(18), 13838; https://doi.org/10.3390/ijms241813838 - 08 Sep 2023

Cited by 1 | Viewed by 1125

Abstract

Electrocatalytic reduction of CO₂ to valuable chemicals can alleviate the energy crisis, and solve the greenhouse effect. The key is to develop non-noble metal electrocatalysts with high activity, selectivity, and stability. Herein, bimetallic metal organic frameworks (MOFs) materials (BiZn-MOF, BiSn-MOF, and BiIn-MOF) were constructed by coordinating the metals Zn, In, Sn, and Bi with the organic ligand 3-amino-1H-1,2,4-triazole-5-carboxylic acid (H₂atzc) through a rapid microwave synthesis approach. The coordination centers in bimetallic MOF catalyst were regulated to optimize the catalytic performance for electrochemical CO₂ reduction reaction (CO₂RR). The optimized catalyst BiZn-MOF exhibited higher catalytic activity than those of Bi-MOF, BiSn-MOF, and BiIn-MOF. BiZn-MOF exhibited a higher selectivity for formate production with a Faradic efficiency (FE = 92%) at a potential of −0.9 V (vs. RHE, reversible hydrogen electrode) with a current density of 13 mA cm⁻². The current density maintained continuous electrolysis for 13 h. The electrochemical conversion of CO₂ to formate mainly follows the *OCHO pathway. The good catalytic performance of BiZn-MOF may be attributed to the Bi-Zn bimetallic coordination centers in the MOF, which can reduce the binding energies of the reaction intermediates by tuning the electronic structure and atomic arrangement. This study provides a feasible strategy for performance optimization of bismuth-based catalysts. Full article

(This article belongs to the Special Issue Advanced Fuel Cells: Design, Synthesis and Photoelectrocatalyst Applications)

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