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Advanced Nanomaterials and Mechanistic Studies for Energy Electrocatalysis
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Advanced Nanomaterials and Mechanistic Studies for Energy Electrocatalysis

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: closed (20 February 2024) | Viewed by 2953

Special Issue Editors

Dr. Kuikui Wang

E-Mail Website
Guest Editor
Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
Interests: electrocatalysts; oxygen evolution reaction; hydrogen evolution reaction
Prof. Dr. Ruguang Ma

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, China
Interests: nanomaterials; electrochemical energy storage and conversion
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Energy electrocatalysis is an important branch of electrochemistry involving the interaction between electrical and chemical reactions in an electrochemical cell. Additionally, the activity and kinetics of an electrochemical reaction are highly influenced by the composition and structure of electrocatalysts. Advanced electrocatalysts, especially nanostructured materials, usually show different electrocatalytic reaction activities and reaction paths from bulk counterparts. Moreover, surface reconstruction, catalyst–support interactions or the interface engineering of nanostructures often remarkably affect the underlying reaction mechanisms, leading to high-performance electrocatalysts.

This Special Issue mainly focuses on energy electrocatalysis, including the design and synthesis of nanostructured electrocatalytic materials, typical applications in the electrolysis of water (hydrogen evolution and oxidation), proton-exchange membrane fuel cells, metal-air batteries, electrosynthesis, piezoelectric catalysis and the corresponding electrocatalytic mechanism.

Potential topics include, but are not limited to:

  • Electrolysis of water
  • Proton-exchange membrane fuel cell
  • Metal-air battery
  • Electrosynthesis
  • Piezoelectric catalysis

Dr. Kuikui Wang
Prof. Dr. Ruguang Ma
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. 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

  • electrosynthesis
  • electrocatalysts
  • oxygen evolution reaction
  • hydrogen evolution reaction
  • mechanism of electrocatalysis

Published Papers (3 papers)

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Research

14 pages, 4714 KiB  
Article
Carbon Quantum Dots-Doped Ni3Se4/Co9Se8/Fe3O4 Multilayer Nanosheets Prepared Using the One-Step Solvothermal Method to Boost Electrocatalytic Oxygen Evolution
by Yao Zhang, Runze Wang, Longqi Zhu, Xu Li, Caixia Sun, Haizhen Liu, Lei Zhu and Kuikui Wang
Materials 2023, 16(14), 5115; https://doi.org/10.3390/ma16145115 - 20 Jul 2023
Cited by 1 | Viewed by 860
Abstract
Oxygen evolution reaction is a momentous part of electrochemical energy storage and conversion devices such as rechargeable metal–air batteries. It is particularly urgent to develop low-cost and efficient electrocatalysts for oxygen evolution reactions. As a potential substitute for noble metal electrocatalysts, transition metal [...] Read more.
Oxygen evolution reaction is a momentous part of electrochemical energy storage and conversion devices such as rechargeable metal–air batteries. It is particularly urgent to develop low-cost and efficient electrocatalysts for oxygen evolution reactions. As a potential substitute for noble metal electrocatalysts, transition metal selenides still prove challenging in improving the activity of oxygen evolution reaction and research into reaction intermediates. In this study, a simple one-step solvothermal method was used to prepare a polymetallic compound carbon matrix composite (Co9Se8/Ni3Se4/Fe3O4@C) with a multilayered nanosheets structure. It exhibited good OER activity in an alkaline electrolyte solution, with an overpotential of 268 mV at 10 mA/cm2. In addition, this catalyst also showed excellent performance in the 24 h stability test. The composite presents a multi-layer sheet structure, which effectively improves the contact between the active site and the electrolyte. The selenide formed by Ni and Co has a synergistic effect, and Fe3O4 and Co9Se8 form a heterojunction structure which can effectively improve the reaction activity by initiating the electronic coupling effect through the interface modification. In addition, carbon quantum dots have rich heteroatoms and electron transferability, which improves the electrochemical properties of the composites. This work provides a new strategy for the preparation of highly efficient OER electrocatalysts utilizing the multi-metal synergistic effect. Full article
(This article belongs to the Special Issue Advanced Nanomaterials and Mechanistic Studies for Energy Electrocatalysis)
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11 pages, 3068 KiB  
Article
Magnetic CoFe1.95Y0.05O4-Decorated Ag3PO4 as Superior and Recyclable Photocatalyst for Dye Degradation
by Qingwang Liu, Mai Xu, Ying Meng, Shikun Chen and Shiliu Yang
Materials 2023, 16(13), 4659; https://doi.org/10.3390/ma16134659 - 28 Jun 2023
Cited by 2 | Viewed by 644
Abstract
The Ag3PO4/CoFe1.95Y0.05O4 nanocomposite with magnetic properties was simply synthesized by the hydrothermal method. The structure and morphology of the prepared material were characterized, and its photocatalytic activity for degradation of the methylene blue and [...] Read more.
The Ag3PO4/CoFe1.95Y0.05O4 nanocomposite with magnetic properties was simply synthesized by the hydrothermal method. The structure and morphology of the prepared material were characterized, and its photocatalytic activity for degradation of the methylene blue and rhodamine B dyes was also tested. It was revealed that the Ag3PO4 in the nanocomposite exhibited a smaller size and higher efficiency in degrading dyes than the individually synthesized Ag3PO4 when exposed to light. Furthermore, the magnetic properties of CoFe1.95Y0.05O4 enabled the nanocomposite to possess magnetic separation capabilities. The stable crystal structure and effective degradation ability of the nanocomposite were demonstrated through cyclic degradation experiments. It was shown that Ag3PO4/CoFe1.95Y0.05O4–0.2 could deliver the highest activity and stability in degrading the dyes, and 98% of the dyes could be reduced within 30 min. Additionally, the photocatalytic enhancement mechanism and cyclic degradation stability of the magnetic nanocomposites were also proposed. Full article
(This article belongs to the Special Issue Advanced Nanomaterials and Mechanistic Studies for Energy Electrocatalysis)
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14 pages, 6866 KiB  
Article
Multifunctional TiO2 Nanotube-Matrix Composites with Enhanced Photocatalysis and Lithium-Ion Storage Performances
by Mengmeng Zhang, Hui Li and Chunrui Wang
Materials 2023, 16(7), 2716; https://doi.org/10.3390/ma16072716 - 29 Mar 2023
Viewed by 1063
Abstract
As a multifunctional material, TiO2 shows excellent performance in catalytic degradation and lithium-ion storage. However, high electron-hole pair recombination, poor conductivity, and low theoretical capacity severely limit the practical application of TiO2. Herein, TiO2 nanotube (TiO2 NT) with [...] Read more.
As a multifunctional material, TiO2 shows excellent performance in catalytic degradation and lithium-ion storage. However, high electron-hole pair recombination, poor conductivity, and low theoretical capacity severely limit the practical application of TiO2. Herein, TiO2 nanotube (TiO2 NT) with a novel double-layer honeycomb structure were prepared by two-step electrochemical anodization. Honeycombed TiO2 NT arrays possess clean top surfaces and a long-range ordering, which greatly facilitates the preparation of high-performance binary and ternary materials. A binary TiO2 nanotube@Au nanoparticle (TiO2 NT@Au NP) composite accompanied by appropriately concentrated and uniformly distributed gold particles was prepared in this work. Interestingly, the TiO2 nanotube@Au nanoparticle (TiO2 NT@Au NP) composites not only showed the excellent catalytic degradation effect of methylene blue, but also demonstrated large lithium-ion storage capacity (310.6 μAh cm−2, 1.6 times of pristine TiO2 NT). Based on the realization of the controllable fabrication of binary TiO2 nanotube@MoS2 nanosheet (TiO2 NT@MoS2 NS) composite, ternary TiO2 nanotube@MoS2 nanosheet@Au nanoparticle (TiO2 NT@MoS2 NS@Au NP) composite with abundant defects and highly ordered structure was also innovatively designed and fabricated. As expected, the TiO2 NT@MoS2 NS@Au NP anode exhibits extremely high initial discharge specific capacity (487.4 μAh cm−2, 2.6 times of pristine TiO2 NT) and excellent capacity retention (81.0%). Full article
(This article belongs to the Special Issue Advanced Nanomaterials and Mechanistic Studies for Energy Electrocatalysis)
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