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Advances in Electrochemical Oxygen Evolution and Photocatalytic Reaction
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Advances in Electrochemical Oxygen Evolution and Photocatalytic Reaction

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Energy Materials".

Deadline for manuscript submissions: closed (10 July 2023) | Viewed by 6377

Special Issue Editor

Prof. Dr. Yen-Pei Fu

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, National Dong Hwa University, Hualien, Taiwan
Interests: photocatalysis; electrochemical sensors; supercapacitors; OER; HER
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Oxygen evolution reactions (OERs) are very crucial for energy conversion in the realm of renewable energy technologies. Expensive metals such as Ir, Ru, and their oxides are currently considered standard materials for good OER performance. However, due to their high cost, low abundance, and low durability, exploration of other inexpensive alternatives with good OER capability has become a priority. Materials which are stable under OER conditions must be targeted for this particular case. Similarly, another branch which comes under renewable and clean energy is photocatalysis. It can be applied in various applications, such as water purification, ammonia synthesis, water splitting, CO2 reduction, electrochemical, etc. These electrochemical and photocatalytic applications are very promising but far from commercialization and need more research.

Therefore, in this Special Issue, the synthesis, in-depth characterizations, and applications of nano- or micromaterials/hybrids into the domain of photo and electrochemical domains will be explored. New materials and techniques with enhanced performance, which add crucial knowledge to the existing science, will be considered.

Prof. Dr. Yen-Pei Fu
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. Materials 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 2600 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

  • oxygen evolution reaction (OER)
  • photocatalysts
  • nanomaterials
  • renewable technology
  • energy and environment

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Published Papers (3 papers)

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Research

11 pages, 3760 KiB  
Article
Composite p-Si/Al2O3/Ni Photoelectrode for Hydrogen Evolution Reaction
by Putinas Kalinauskas, Laurynas Staišiūnas, Asta Grigucevičienė, Konstantinas Leinartas, Aldis Šilėnas, Dalia Bučinskienė and Eimutis Juzeliūnas
Materials 2023, 16(7), 2785; https://doi.org/10.3390/ma16072785 - 30 Mar 2023
Viewed by 1297
Abstract
A photoelectrode for hydrogen evolution reaction (HER) is proposed, which is based on p-type silicon (p-Si) passivated with an ultrathin (10 nm) alumina (Al2O3) layer and modified with microformations of a nickel catalyst. The Al2O3 layer [...] Read more.
A photoelectrode for hydrogen evolution reaction (HER) is proposed, which is based on p-type silicon (p-Si) passivated with an ultrathin (10 nm) alumina (Al2O3) layer and modified with microformations of a nickel catalyst. The Al2O3 layer was formed using atomic layer deposition (ALD), while the nickel was deposited photoelectrochemically. The alumina film improved the electronic properties of the substrate and, at the same time, protected the surface from corrosion and enabled the deposition of nickel microformations. The Ni catalyst increased the HER rate up to one order of magnitude, which was comparable with the rate measured on a hydrogen-terminated electrode. Properties of the alumina film on silicon were comprehensively studied. Grazing incidence X-ray diffraction (GI-XRD) identified the amorphous structure of the ALD oxide layer. Optical profilometry and spectroscopic ellipsometry (SE) showed stability of the film in an acid electrolyte. Resistivity measurements showed that annealing of the film increases its electric resistance by four times. Full article
(This article belongs to the Special Issue Advances in Electrochemical Oxygen Evolution and Photocatalytic Reaction)
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17 pages, 4705 KiB  
Article
Scavenging of Organic Pollutant and Fuel Generation through Cost-Effective and Abundantly Accessible Rust: A Theoretical Support with DFT Simulations
by Nisar Khan, Tamanna Gul, Idrees Khan, Eman A. Alabbad, Shahid Ali, Khalid Saeed and Ibrahim Khan
Materials 2023, 16(1), 142; https://doi.org/10.3390/ma16010142 - 23 Dec 2022
Cited by 3 | Viewed by 1885
Abstract
Waste management and energy generation are the foremost concerns due to their direct relationship with biological species and the environment. Herein, we report the utilization of iron rust (inorganic pollutant) as a photocatalyst for the photodegradation of methylene blue (MB) dye (organic pollutant) [...] Read more.
Waste management and energy generation are the foremost concerns due to their direct relationship with biological species and the environment. Herein, we report the utilization of iron rust (inorganic pollutant) as a photocatalyst for the photodegradation of methylene blue (MB) dye (organic pollutant) under visible light (economic) and water oxidation (energy generation). Iron rust was collected from metallic pipes and calcined in the furnace at 700 °C for 3 h to remove the moisture/volatile content. The uncalcined and calcined rust NPs are characterized through scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier-transform infrared (FTIR) analysis, X-ray Diffraction (XRD), and thermogravimetric analysis (TGA). The morphological study illustrated that the shape of uncalcined and calcined iron rust is spongy, porous, and agglomerated. The XRD and DLS particle sizes are in a few hundred nanometers range. The photodegradation (PD) investigation shows that calcined rust NPs are potent for the PD of modeled MB, and the degradation efficiency was about 94% in a very short time of 11 min. The photoelectrochemical (PEC) measurements revealed that calcined rust NPs are more active than uncalcined rust under simulated 1 SUN illumination with the respective photocurrent densities of ~0.40 and ~0.32 mA/cm2. The density functional theory simulations show the chemisorption of dye molecules over the catalyst surface, which evinces the high catalytic activity of the catalyst. These results demonstrate that cheaper and abundantly available rust can be useful for environmental and energy applications. Full article
(This article belongs to the Special Issue Advances in Electrochemical Oxygen Evolution and Photocatalytic Reaction)
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15 pages, 4803 KiB  
Article
Magnetic Zinc Oxide/Manganese Ferrite Composite for Photodegradation of the Antibiotic Rifampicin
by Filipe da Silva Duarte, Amanda Lys Matos dos Santos Melo, Alice de Barros Ferro, Carmem Lúcia de Paiva e Silva Zanta, José Leandro da Silva Duarte and Rosane Maria Pessoa Betânio Oliveira
Materials 2022, 15(22), 8185; https://doi.org/10.3390/ma15228185 - 18 Nov 2022
Cited by 10 | Viewed by 2108
Abstract
In this study, a composite of zinc oxide and manganese ferrite was synthesized using co-precipitation and hydrothermal routes, to be used as photocatalysts in reactions with UV/Vis light source. The synthesized materials were characterized by FTIR, XRD, and SEM, where it was possible [...] Read more.
In this study, a composite of zinc oxide and manganese ferrite was synthesized using co-precipitation and hydrothermal routes, to be used as photocatalysts in reactions with UV/Vis light source. The synthesized materials were characterized by FTIR, XRD, and SEM, where it was possible to verify the efficiency of the syntheses performed, through the identification of the resulting phases, the evaluation of the structural morphology of the particles, and the analysis of the detachments of the main vibration bonds present in these materials. The composite ZnO/MnFe2O4 was used in photodegradation reactions of the antibiotic rifampicin, with catalyst dosage of 0.20; 0.40, and 0.60 g and 10 ppm of rifampicin, reactions using pure ZnO as a catalyst were also performed as a comparative parameter of the influence of MnFe2O4 in this system. The composite ZnO/MnFe2O4 showed a maximum percentage of rifampicin decontamination of 94.72% and ZnO, 74.20%using 0.20 g of photocatalyst after 90 min, which indicates a positive influence on this process. The solution treated with ZnO/MnFe2O4 was subjected to magnetic field induction for attraction and consequently accelerated removal of the solids present, successfully, compacting for the application of ZnO/MnFe2O4 to be presented as a promising material for decontamination of emerging pollutants through photocatalytic reactions. Full article
(This article belongs to the Special Issue Advances in Electrochemical Oxygen Evolution and Photocatalytic Reaction)
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