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Nanomaterials
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Atomic Catalyst for Photoreduction and Electroreduction
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Atomic Catalyst for Photoreduction and Electroreduction

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 6426

Special Issue Editors

Dr. Xijun Liu

E-Mail Website
Guest Editor
School of Resources, Environment and Materials, Guangxi University, Nanning, China
Interests: hydrogen production; CO2 fixation; NH3 electrosynthesis; Zn-based batteries
Special Issues, Collections and Topics in MDPI journals
Dr. Guangzhi Hu

E-Mail Website
Guest Editor
School of Ecology and Environmental Science, Yunnan University, Kunming, China
Interests: single-atom catalyst; nitrate electroreduction; pollutant degradation

Special Issue Information

Dear Colleagues,

As the frontier in the field of catalysis, atomic catalysts (ACs) have attracted great attention due to their prominent advantages in high atomic utilization efficiency, outstanding activity, and selectivity, as compared to their bulk counterparts. The amount of studies on ACs has increased exponentially, reflecting the current boom in interest regarding this hot topic. To date, the developed ACs mainly include single-atom catalysts, atomic thickness materials, and nanoclusters, although, due to their distinct physical and chemical properties, they have been proved to be capable of promoting various catalytic reactions for energy conversion and storage, photoreduction and electroreduction reactions driven by renewable energy sources particularly representing attractive approaches for converting useless molecules into valuable chemicals. Despite great advancements having been achieved, there are still some “black boxes” calling for clarification:

  • The effect of adjacent atoms or supports on active sites;
  • The development of ACs with bifunctionality or even multi-functionality;
  • The reaction stability during photo-/electro-catalysis;
  • The improvement of reduction kinetics.

As such, there is definitely plenty of interesting work to conduct and experiences to share to continue the development of efficient ACs toward photoreduction and electroreduction. In this Special Issue of Nanomaterials, we welcome papers for publication sharing your research and advances in this field.

Dr. Xijun Liu
Dr. Guangzhi Hu
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. Nanomaterials 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 2900 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

  • atomic catalysts
  • synthesis strategies
  • structural characterizations
  • catalytic mechanisms
  • CO2 reduction
  • nitrogen reduction
  • oxygen reduction

Published Papers (3 papers)

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Research

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15 pages, 2977 KiB  
Article
Laser-Induced Synthesis of Electrocatalytically Active Ag, Pt, and AgPt/Polyaniline Nanocomposites for Hydrogen Evolution Reactions
by Anna A. Vasileva, Daria V. Mamonova, Yuri V. Petrov, Ilya E. Kolesnikov, Gerd Leuchs and Alina A. Manshina
Nanomaterials 2023, 13(1), 88; https://doi.org/10.3390/nano13010088 - 24 Dec 2022
Cited by 3 | Viewed by 1498
Abstract
We present an efficient and easily implemented approach for creating stable electrocatalytically active nanocomposites based on polyaniline (PANI) with metal NPs. The approach combines in situ synthesis of polyaniline followed by laser-induced deposition (LID) of Ag, Pt, and AgPt NPs. The observed peculiarity [...] Read more.
We present an efficient and easily implemented approach for creating stable electrocatalytically active nanocomposites based on polyaniline (PANI) with metal NPs. The approach combines in situ synthesis of polyaniline followed by laser-induced deposition (LID) of Ag, Pt, and AgPt NPs. The observed peculiarity of LID of PANI is the role of the substrate during the formation of multi-metallic nanoparticles (MNP). This allows us to solve the problem of losing catalytically active particles from the electrode’s surface in electrochemical use. The synthesized PANI/Ag, PANI/Pt, and PANI/AgPt composites were studied with different techniques, such as SEM, EDX, Raman spectroscopy, and XPS. These suggested a mechanism for the formation of MNP on PANI. The MNP–PANI interaction was demonstrated, and the functionality of the nanocomposites was studied through the electrocatalysis of the hydrogen evolution reaction. The PANI/AgPt nanocomposites demonstrated both the best activity and the most stable metal component in this process. The suggested approach can be considered as universal, since it can be extended to the creation of electrocatalytically active nanocomposites with various mono- and multi-metallic NPs. Full article
(This article belongs to the Special Issue Atomic Catalyst for Photoreduction and Electroreduction)
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Review

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15 pages, 3769 KiB  
Review
Introduction of Surface Modifiers on the Pt-Based Electrocatalysts to Promote the Oxygen Reduction Reaction Process
by Haibin Wang, Yi Wang, Chunlei Li, Qiuping Zhao and Yuanyuan Cong
Nanomaterials 2023, 13(9), 1544; https://doi.org/10.3390/nano13091544 - 04 May 2023
Cited by 2 | Viewed by 1482
Abstract
The design of Pt-based electrocatalysts with high efficiency towards acid oxygen reduction reactions is the priority to promote the development and application of proton exchange membrane fuel cells. Considering that the Pt atoms on the surfaces of the electrocatalysts face the problems of [...] Read more.
The design of Pt-based electrocatalysts with high efficiency towards acid oxygen reduction reactions is the priority to promote the development and application of proton exchange membrane fuel cells. Considering that the Pt atoms on the surfaces of the electrocatalysts face the problems of interference of non-active species (such as OHad, OOHad, CO, etc.), high resistance of mass transfer at the liquid–solid interfaces, and easy corrosion when working in harsh acid. Researchers have modified the surfaces’ local environment of the electrocatalysts by introducing surface modifiers such as silicon or carbon layers, amine molecules, and ionic liquids on the surfaces of electrocatalysts, which show significant performance improvement. In this review, we summarized the research progress of surface modified Pt-based electrocatalysts, focusing on the surface modification strategies and their mechanisms. In addition, the development prospects of surface modification strategies of Pt-based electrocatalysts and the limitations of current research are pointed out. Full article
(This article belongs to the Special Issue Atomic Catalyst for Photoreduction and Electroreduction)
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28 pages, 5082 KiB  
Review
Asymmetric Coordination Environment Engineering of Atomic Catalysts for CO2 Reduction
by Xianghua Hou, Junyang Ding, Wenxian Liu, Shusheng Zhang, Jun Luo and Xijun Liu
Nanomaterials 2023, 13(2), 309; https://doi.org/10.3390/nano13020309 - 11 Jan 2023
Cited by 18 | Viewed by 2923
Abstract
Single-atom catalysts (SACs) have emerged as well-known catalysts in renewable energy storage and conversion systems. Several supports have been developed for stabilizing single-atom catalytic sites, e.g., organic-, metal-, and carbonaceous matrices. Noticeably, the metal species and their local atomic coordination environments have a [...] Read more.
Single-atom catalysts (SACs) have emerged as well-known catalysts in renewable energy storage and conversion systems. Several supports have been developed for stabilizing single-atom catalytic sites, e.g., organic-, metal-, and carbonaceous matrices. Noticeably, the metal species and their local atomic coordination environments have a strong influence on the electrocatalytic capabilities of metal atom active centers. In particular, asymmetric atom electrocatalysts exhibit unique properties and an unexpected carbon dioxide reduction reaction (CO2RR) performance different from those of traditional metal-N4 sites. This review summarizes the recent development of asymmetric atom sites for the CO2RR with emphasis on the coordination structure regulation strategies and their effects on CO2RR performance. Ultimately, several scientific possibilities are proffered with the aim of further expanding and deepening the advancement of asymmetric atom electrocatalysts for the CO2RR. Full article
(This article belongs to the Special Issue Atomic Catalyst for Photoreduction and Electroreduction)
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