Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.2
3.4
Journals
Materials
Special Issues
Transition Metal Nanomaterials: Synthesis and Photo/Electrocatalytic Performance
materials-logo
Submit to Special Issue Submit Abstract to Special Issue Review for Materials Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Transition Metal Nanomaterials: Synthesis and Photo/Electrocatalytic Performance

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

Deadline for manuscript submissions: 20 September 2024 | Viewed by 1348

Special Issue Editor

Dr. Ellie Uzunova

E-Mail Website
Guest Editor
Institute of General and Inorganic Chemistry Bulgarian Academy of Sciences, Sofia, Bulgaria
Interests: computational chemistry; ab initio studies; transition metal oxides; chalcogenides; photoactivation; catalysis

Special Issue Information

Dear Colleagues,

The design of efficient photo/electrocatalysts for the production of fuel from renewable sources (water decomposition, carbon dioxide reduction) is an expanding area of research. TiO2 was among the prospective electrocatalysts for water splitting. Cuprous oxide (Cu2O) adsorbs water dissociatively, and also proved promising in carbon dioxide reduction. A well-known bottleneck of the electrochemical water dissociation is the high overpotential for OER, the oxygen evolution reaction. Two major trends in the development of photo/electrocatalysts emerged: (1) the synthesis of nanomaterials and layered 2D (two-dimensional) solid films, and (2) the synthesis of compounds, which are analogues of natural enzymes (hydrogenase, carbon monoxide dehydrogenase) aiming at artificial photosynthesis. A number of properties need to be monitored when changing from bulk to nanomaterials or layers: the band gaps, the number and type of defects, the ability to accept and donate electrons. For transition metal oxides it proved useful to link nanoparticles to a light absorber, while chalcogenides may provide themselves favorable light absorption bands. Theoretical models help in the predictability of potentially active photo-electro catalysts. 

There are certainly more redox reactions which benefit from the design of efficient photoelectrochemical cell.

I kindly invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Dr. Ellie Uzunova
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

  • light absorbers
  • OER (Oxygen evolution reaction)
  • HER (Hydrogen evolution reaction)
  • CO2 reduction
  • photoactivated electrochemical redox reactions
  • artificial photosynthesis
  • 2D (two-dimensional) transition metal compounds
  • quantum chemical modeling of photoactive electrocatalysts

Published Papers (2 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

13 pages, 3834 KiB  
Article
Upcycling of Cr-Containing Sulfate Waste into Efficient FeCrO3/Fe2O3 Catalysts for CO2 Hydrogenation Reaction
by Yongqi Liu, Shasha Chu, Yuebing Xu, Xinyu Chen, Hao Zhou, Jinlin Li, Yanjie Ren and Xintai Su
Materials 2024, 17(7), 1598; https://doi.org/10.3390/ma17071598 - 31 Mar 2024
Viewed by 475
Abstract
Upcycling Cr-containing sulfate waste into catalysts for CO2 hydrogenation reaction benefits both pollution mitigation and economic sustainability. In this study, FeCrO3/Fe2O3 catalysts were successfully prepared by a simple hydrothermal method using Cr-containing sodium sulfate (Cr-SS) as a [...] Read more.
Upcycling Cr-containing sulfate waste into catalysts for CO2 hydrogenation reaction benefits both pollution mitigation and economic sustainability. In this study, FeCrO3/Fe2O3 catalysts were successfully prepared by a simple hydrothermal method using Cr-containing sodium sulfate (Cr-SS) as a Cr source for efficient conversion and stable treatment of Cr. The removal rate of Cr in Cr-SS can reach 99.9% at the optimized hydrothermal conditions. When the synthesized catalysts were activated and used for the CO2 hydrogenation reaction, a 50% increase in CO2 conversion was achieved compared with the catalyst prepared by impregnation with a comparable amount of Cr. According to the extraction and risk assessment code (RAC) of the Reference Office of the European Community Bureau (BCR), the synthesized FeCrO3/Fe2O3 is risk-free. This work not only realizes the detoxification of the Cr-SS but transfers Cr into stable FeCrO3 for application in a catalytic field, which provides a strategy for the harmless disposal and resource utilization of Cr-containing hazardous waste. Full article
(This article belongs to the Special Issue Transition Metal Nanomaterials: Synthesis and Photo/Electrocatalytic Performance)
►▼ Show Figures

Figure 1

11 pages, 4341 KiB  
Article
Solution Combustion Synthesis of Ni-Based Nanocatalyst Using Ethylenediaminetetraacetic Acid and Nickel-Carbon Nanotube Growth Behavior
by Juyoung Kim, Hwanseok Lee, Jaekwang Lee, Hyunjo Yoo, Ilguk Jo and Heesoo Lee
Materials 2023, 16(22), 7191; https://doi.org/10.3390/ma16227191 - 16 Nov 2023
Viewed by 637
Abstract
We studied the influence of the ethylenediaminetetraacetic acid (EDTA) content used as combustion fuel when fabricating nickel oxide (NiO) nanocatalysts via solution combustion synthesis, as well as the growth behavior of carbon nanotubes (CNTs) using this catalyst. Nickel nitrate hexahydrate (Ni(NO3) [...] Read more.
We studied the influence of the ethylenediaminetetraacetic acid (EDTA) content used as combustion fuel when fabricating nickel oxide (NiO) nanocatalysts via solution combustion synthesis, as well as the growth behavior of carbon nanotubes (CNTs) using this catalyst. Nickel nitrate hexahydrate (Ni(NO3)2∙6H2O) was used as the metal precursor (an oxidizer), and the catalysts were synthesized by adjusting the molar ratio of fuel (EDTA) to oxidizer in the range of 1:0.25 to 2.0. The results of the crystal structure analysis showed that as the EDTA content increased beyond the chemical stoichiometric balance with Ni(NO3)2∙6H2O (F/O = 0.25), the proportion of Ni metal within the catalyst particles decreased, and only single-phase NiO was observed. Among the synthesized catalysts, the smallest crystallite size was observed with a 1:1 ratio of Ni ions to EDTA. However, an increase in the amount of EDTA resulted in excessive fuel supply, leading to an increase in crystallite size. Microstructure analysis revealed porous NiO agglomerates due to the use of EDTA, and differences in particle growth based on the fuel ratio were observed. We analyzed the growth behavior of CNTs grown using NiO nanocatalysts through catalytic chemical vapor deposition (CCVD). As the F/O ratio increased, it was observed that the catalyst particles grew excessively beyond hundreds of nanometers, preventing further CNT growth and leading to a rapid termination of CNT growth. Raman spectroscopy was used to analyze the structural characteristics of CNTs, and it was found that the ID/IG ratio indicated the highest CNT crystallinity near an F/O ratio of 1:1. Full article
(This article belongs to the Special Issue Transition Metal Nanomaterials: Synthesis and Photo/Electrocatalytic Performance)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-2
Back to TopTop