Special Issue "Graphene-Based Materials for Energy Conversion"

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: closed (30 November 2017)

Special Issue Editors

Guest Editor
Dr. Maria Jesús Lázaro

Institute of Carbochemistry, CSIC-Spanish National Research Council, C/. Miguel Luesma Castán, 4, 50018 Zaragoza, Spain
E-Mail
Phone: 34976733977
Interests: carbon materials; catalyts; fuel cell; hydrogen; carbon catalysts; NO Reduction
Guest Editor
Dr. Maria Victoria Martínez Huerta

Institute of Catalisis and Petrochemistry, C/ Marie Curie 2, 28049 Madrid, Spain
Website | E-Mail
Interests: electrocatalysts; fuel cells; energy; electrolysers; nanomaterials; graphene

Special Issue Information

Dear Colleagues,

On the basis of its unique structure and excellent properties, graphene is considered to have the potential to be able to contribute to the construction of a sustainable energy generation system, in which renewable energies can be used. Energy can be effectively converted to applicable forms (electricity or fuel) from infinite sources, especially from solar power and water. Aiming at this goal, a variety of graphene-based materials has emerged as one of the fascinating alternative electrode materials for application in fuel cells, regenerative fuel cells and solar cells. Nonetheless, the research towards advanced graphene materials for energy conversion applications is still at an early stage. A number of challenges remain to be explored.

This Special Issue aims to address current and future advancements in all aspects of the graphene-based catalysts and materials for fuel cells and solar cells applications, including novel synthetical strategies and device fabrication processes, and the study of their structure, electronic and physical properties.

Dr. Maria Jesús Lázaro
Dr. Maria Victoria Martínez-Huerta
Guest Editors

Manuscript Submission Information

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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. Catalysts 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 1000 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.

Published Papers (4 papers)

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Research

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Open AccessArticle S- and N-Doped Graphene Nanomaterials for the Oxygen Reduction Reaction
Catalysts 2017, 7(9), 278; doi:10.3390/catal7090278
Received: 17 August 2017 / Revised: 15 September 2017 / Accepted: 16 September 2017 / Published: 18 September 2017
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Abstract
In the current work, heteroatom-doped graphene materials containing different atomic ratios of nitrogen and sulphur were employed as electrocatalysts for the oxygen reduction reaction (ORR) in acidic and alkaline media. To this end, the hydrothermal route and different chemical reducing agents were employed
[...] Read more.
In the current work, heteroatom-doped graphene materials containing different atomic ratios of nitrogen and sulphur were employed as electrocatalysts for the oxygen reduction reaction (ORR) in acidic and alkaline media. To this end, the hydrothermal route and different chemical reducing agents were employed to synthesize the catalytic materials. The physicochemical characterization of the catalysts was performed by several techniques, such as X-ray diffraction, Raman spectroscopy and elemental analysis; meanwhile, the electrochemical performance of the materials toward the ORR was analyzed by linear sweep voltammetry (LSV), rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE) techniques. The main results indicate that the ORR using heteroatom-doped graphene is a direct four-electron pathway, for which the catalytic activity is higher in alkaline than in acidic media. Indeed, a change of the reaction mechanism was observed with the insertion of N into the graphenic network, by the rate determining step changes from the first electrochemical step (formation of adsorbed OOH) on glassy carbon to the removal of adsorbed O (Oad) from the N-graphene surface. Moreover, the addition of sulphur atoms into the N-graphene structure increases the catalytic activity toward the ORR, as the desorption of Oad is accelerated. Full article
(This article belongs to the Special Issue Graphene-Based Materials for Energy Conversion)
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Open AccessArticle Facile Synthesis of MnPO4·H2O Nanowire/Graphene Oxide Composite Material and Its Application as Electrode Material for High Performance Supercapacitors
Catalysts 2016, 6(12), 198; doi:10.3390/catal6120198
Received: 31 October 2016 / Revised: 26 November 2016 / Accepted: 5 December 2016 / Published: 9 December 2016
Cited by 1 | PDF Full-text (17705 KB) | HTML Full-text | XML Full-text | Supplementary Files
Abstract
In this work, we reported a facile one-pot hydrothermal method to synthesize MnPO4·H2O nanowire/graphene oxide composite material with coated graphene oxide. Transmission electron microscopy and scanning electron microscope were employed to study its morphology information, and X-ray diffraction was
[...] Read more.
In this work, we reported a facile one-pot hydrothermal method to synthesize MnPO4·H2O nanowire/graphene oxide composite material with coated graphene oxide. Transmission electron microscopy and scanning electron microscope were employed to study its morphology information, and X-ray diffraction was used to study the phase and structure of the material. Additionally, X-ray photoelectron spectroscopy was used to study the elements information. To measure electrochemical performances of electrode materials and the symmetry cell, cyclic voltammetry, chronopotentiometry and electrochemical impedance spectrometry were conducted on electrochemical workstation using 3 M KOH electrolytes. Importantly, electrochemical results showed that the as-prepared MnPO4·H2O nanowire/graphene oxide composite material exhibited high specific capacitance (287.9 F·g−1 at 0.625 A·g−1) and specific power (1.5 × 105 W·kg−1 at 2.271 Wh·kg−1), which is expected to have promising applications as supercapacitor electrode material. Full article
(This article belongs to the Special Issue Graphene-Based Materials for Energy Conversion)
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Review

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Open AccessFeature PaperReview Recent Progress on the Synthesis of Graphene-Based Nanostructures as Counter Electrodes in DSSCs Based on Iodine/Iodide Electrolytes
Catalysts 2017, 7(8), 234; doi:10.3390/catal7080234
Received: 27 July 2017 / Revised: 9 August 2017 / Accepted: 9 August 2017 / Published: 14 August 2017
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Abstract
Graphene-based nanomaterials functionalized by different doping strategies have attracted great attention for energy conversion themes, due to their large specific surface area, high conductivity, and appreciable electrocatalytic properties. This mini-review presents an overview of the recent progress in the synthesis of graphene-based nanomaterials
[...] Read more.
Graphene-based nanomaterials functionalized by different doping strategies have attracted great attention for energy conversion themes, due to their large specific surface area, high conductivity, and appreciable electrocatalytic properties. This mini-review presents an overview of the recent progress in the synthesis of graphene-based nanomaterials as counter electrodes for dye-sensitized solar cells based on iodine/iodide electrolytes, along with challenges and perspectives in this exciting field. Full article
(This article belongs to the Special Issue Graphene-Based Materials for Energy Conversion)
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Open AccessFeature PaperReview The New Graphene Family Materials: Synthesis and Applications in Oxygen Reduction Reaction
Catalysts 2017, 7(1), 1; doi:10.3390/catal7010001
Received: 1 November 2016 / Revised: 7 December 2016 / Accepted: 19 December 2016 / Published: 23 December 2016
Cited by 1 | PDF Full-text (7729 KB) | HTML Full-text | XML Full-text
Abstract
Graphene family materials, including graphene quantum dots (GQDs), graphene nanoribbons (GNRs) and 3D graphene (3D-G), have attracted much research interest for the oxygen reduction reaction (ORR) in fuel cells and metal-air batteries, due to their unique structural characteristics, such as abundant activate sites,
[...] Read more.
Graphene family materials, including graphene quantum dots (GQDs), graphene nanoribbons (GNRs) and 3D graphene (3D-G), have attracted much research interest for the oxygen reduction reaction (ORR) in fuel cells and metal-air batteries, due to their unique structural characteristics, such as abundant activate sites, edge effects and the interconnected network. In this review, we summarize recent developments in fabricating various new graphene family materials and their applications for use as ORR electrocatalysts. These new graphene family materials play an important role in improving the ORR performance, thus promoting the practical use in metal-air batteries and fuel cells. Full article
(This article belongs to the Special Issue Graphene-Based Materials for Energy Conversion)
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