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Metals
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Advancements on Functional Catalytic Materials with Noble-Metal-Like Characters
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Advancements on Functional Catalytic Materials with Noble-Metal-Like Characters

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metallic Functional Materials".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 6268

Special Issue Editor

Dr. Weiyi Yang

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, China
Interests: functional materials for environmental remediation; non-noble-metal-based functional materials; multi-field coupling effect of functional materials

Special Issue Information

Dear Colleagues,

Traditional highly efficient catalytic nanomaterials usually contain noble metals, such as platinum, palladium, gold, and silver. Regarding the practical application of these catalysts, there are several unignorable limitations. For instance, noble metal elements are scarce resources in nature, and as such, the cost of raw material is extremely high. Nanosized noble-metal-containing catalysts usually have poor heat resistance and chemical stability, such as vulnerability to the corrosion caused by halogen elements, which makes it challenging to maintain catalytic performance. These disadvantages severely restrict the further development and broadening application of noble-metal-containing catalysts. In recent decades, non-noble-metal-containing catalysts, such as transition metal nitride, carbide, and sulfide, with a similar electronic structure to noble metals, have attracted a large amount of attention, and the related research results indicated them to be significantly promising low-cost catalyst materials.

In this Special Issue, we welcome articles that focus on the synthesis and design of novel functional catalysts with noble-metal-like characteristics and their related catalytic performance. By defect implant and material genome engineering, it is proved to be significantly effective to tune the electronic properties of non-noble-metal-containing catalysts, which is a new research field that has attracted worldwide interest.        

Prof. Dr. Weiyi Yang
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. Metals 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 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

  • non-noble-metal-containing catalysts
  • nitride
  • carbide
  • sulfide
  • defect engineering
  • material genome engineering
  • electronic properties

Published Papers (3 papers)

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Research

14 pages, 4870 KiB  
Article
Sodium Borohydride Treatment to Prepare Manganese Oxides with Oxygen Vacancy Defects for Efficient Oxygen Reduction
by Shuo Sun, Haoran Yu, Lanlan Li, Xiaofei Yu, Xinghua Zhang, Zunming Lu and Xiaojing Yang
Metals 2022, 12(7), 1059; https://doi.org/10.3390/met12071059 - 21 Jun 2022
Cited by 3 | Viewed by 1888
Abstract
Manganese oxides are often used as catalysts for oxygen reduction reactions due to their low price and high stability, and they have been extensively studied. However, the poor electrical conductivity and low intrinsic activity of manganese oxides restrict its application in oxygen reduction. [...] Read more.
Manganese oxides are often used as catalysts for oxygen reduction reactions due to their low price and high stability, and they have been extensively studied. However, the poor electrical conductivity and low intrinsic activity of manganese oxides restrict its application in oxygen reduction. In this paper, the manganese oxide octahedral molecular sieve is used as the research object, and the oxygen reduction performance of the material is adjusted by the surface reduction etching treatment of sodium borohydride. After being treated with 8 mmol/L sodium borohydride, the oxygen vacancy content of the manganese oxide octahedral molecular sieve was 26%. The manganese oxide octahedral molecular sieve showed the best performance, and its half-wave potential was 0.821 V. Tests show that the material has excellent electrical conductivity and high oxygen reduction kinetics. The generation of appropriate oxygen vacancies on the surface directly improves the chemical properties of the material surface, regulates the ratio of Mn3+/Mn4+ on the surface of the nanorod, and increases the oxygen reduction adsorption sites on the surface of the material. On the other hand, the electrical conductivity of the material is adjusted to increase the electron transfer rate during the oxygen reduction process, thereby enhancing the oxygen reduction activity. Full article
(This article belongs to the Special Issue Advancements on Functional Catalytic Materials with Noble-Metal-Like Characters)
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11 pages, 5064 KiB  
Article
Study on the Effect of A/B Site Co-Doping on the Oxygen Evolution Reaction Performance of Strontium Cobaltite
by Shihao Song, Xiaoming Mu, Yanwei Ren, Jia Guo, Haifei Wei, Heyan Liu and Zunming Lu
Metals 2022, 12(6), 991; https://doi.org/10.3390/met12060991 - 10 Jun 2022
Cited by 1 | Viewed by 1803
Abstract
The perovskite oxide SrCoO3−x is a promising oxygen electrocatalyst for renewable energy storage and conversion technologies. Here, A, B-site Co-doped perovskite Sr0.5Ba0.5Co0.95Mn0.05O3−x nanoparticles were rationally designed and synthesized by the sol-gel method with [...] Read more.
The perovskite oxide SrCoO3−x is a promising oxygen electrocatalyst for renewable energy storage and conversion technologies. Here, A, B-site Co-doped perovskite Sr0.5Ba0.5Co0.95Mn0.05O3−x nanoparticles were rationally designed and synthesized by the sol-gel method with an average size of 30–40 nm. It has a remarkable intrinsical activity and stability in 1 M KOH solution. Compared with other A-site (SraA1−aCoO3−x A=Ba, Ca) and B-site doped perovskite (SrCobR1−bO3−x R=Mn, Fe, Ni, B) catalysts, Sr0.5Ba0.5Co0.95Mn0.05O3−x exhibits superior oxygen evolution reaction (OER) performance, smaller Tafel slope, and lower overpotential. The high electrochemical performance of Sr0.5Ba0.5Co0.95Mn0.05O3−x is attributed to its optimized crystal structure and the increase in the content of Co3+. This study demonstrates that highly symmetrical cubic perovskite structure catalytic displays better OER performance. Full article
(This article belongs to the Special Issue Advancements on Functional Catalytic Materials with Noble-Metal-Like Characters)
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11 pages, 3636 KiB  
Article
Magnetic-Field-Induced Strain Enhances Electrocatalysis of FeCo Alloys on Anode Catalysts for Water Splitting
by Heyan Liu, Yanwei Ren, Kai Wang, Xiaoming Mu, Shihao Song, Jia Guo, Xiaojing Yang and Zunming Lu
Metals 2022, 12(5), 800; https://doi.org/10.3390/met12050800 - 5 May 2022
Cited by 4 | Viewed by 2184
Abstract
In water splitting, the oxygen evolution reaction (OER) performance of transition metal alloy catalysts needs to be further improved. To solve this problem, the method of an external magnetic field was used to improve the OER catalytic performance of the alloy catalyst. In [...] Read more.
In water splitting, the oxygen evolution reaction (OER) performance of transition metal alloy catalysts needs to be further improved. To solve this problem, the method of an external magnetic field was used to improve the OER catalytic performance of the alloy catalyst. In this paper, FeCo alloys with different composition ratios were prepared by an arc melting method, and OER catalysts with different compositions were obtained by annealing treatment. Under the action of a magnetic field, all three groups of catalysts showed a better catalytic performance than those without a magnetic field. The overpotentials of Fe35Co65, Fe22Co78 and Fe15Co85 at a current density of 20 mA cm−2 were reduced by 12 mV, 6 mV and 2 mV, respectively. It is found that, due to the magnetostrictive properties of FeCo alloys, the catalyst itself will generate strain under the action of a magnetic field, and the existence of strain may be the main reason for the enhanced OER performance of the magnetic field. Therefore, this work provides a new idea for the development of magnetic material catalysts and a magnetic field to improve the performance of catalysts. Full article
(This article belongs to the Special Issue Advancements on Functional Catalytic Materials with Noble-Metal-Like Characters)
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