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Catalysis for Electro-oxidation of Ethanol & Methanol
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Catalysis for Electro-oxidation of Ethanol & Methanol

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Electrocatalysis".

Deadline for manuscript submissions: closed (31 October 2018) | Viewed by 10231

Special Issue Editors

Prof. Dr. Xiaowei Teng

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of New Hampshire, W301 Kingsbury Hall, 33 Academic Way, Durham, NH 03824, USA
Interests: batteries; catalysis/kinetics; direct energy conversion; energy storage systems; fuel cells
Prof. Dr. Hao Yu

E-Mail Website
Guest Editor
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
Interests: novel catalysts based on carbon nanomaterials; sustainable catalytic oxidation technology; catalytic reaction engineering

Special Issue Information

Dear Colleagues,

Rising demands for energy coupled with concerns over environmental pollution and growing fossil fuel costs have contributed to a great need for clean and efficient power sources. To achieve the goal of reducing more than 50% of CO2 emissions in the year 2050 compared to CO2 emissions in 2009, as proposed by International Energy Agency (IEA), the transportation sector must reduce CO2 emission dramatically. It is very clear that simply improving efficiency of internal combustion engines that is subject to Carnot cycle limitations will not be able to achieve such a goal. Thus, another high efficient energy conversion device as alternative to internal combustion engine or another fuel as alternative to gasoline is highly demanded in order to reduce CO2 emissions.

Electrochemical oxidation of small organic molecules is regarded as the most promising technology due to its high thermodynamic efficiency (up to 97%) via low temperature direct fuel cell reaction. Compared with hydrogen, room temperature liquid alcohols such as ethanol and methanol are more promising in fuel cell devices for their high volumetric energy densities, better safety and low-cost generation and storage. While many exciting works have been reported, there is much to be done to further understand the structure-property relationship in the electro-oxidation of ethanol and methanol. 

The aim of this Special Issue is to cover recent research progress in the fields of electro-oxidation of alcohols including but not limited to methanol and ethanol, especially research effort in fundamental understanding the effects of the atomic structures of the catalysts on the reactivity, selectivity and durability of the electro-catalytic processes using advanced theoretical and experimental approaches. The research results on the electro-catalytic process for the production of both electricity and chemicals are also welcome for submission.

Prof. Xiaowei Teng
Prof. Hao Yu
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. 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 2200 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

  • Electro-oxidation
  • Ethanol fuel
  • Methanol fuel
  • Structure characterization
  • Reaction mechanism
  • Reactivity
  • Selectivity

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Published Papers (2 papers)

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Research

18 pages, 9636 KiB  
Article
Electrocatalytic Oxidation of Small Molecule Alcohols over Pt, Pd, and Au Catalysts: The Effect of Alcohol’s Hydrogen Bond Donation Ability and Molecular Structure Properties
by Bei Wang, Liu Tao, Yu Cheng, Fang Yang, Yuguang Jin, Chunmei Zhou, Hao Yu and Yanhui Yang
Catalysts 2019, 9(4), 387; https://doi.org/10.3390/catal9040387 - 25 Apr 2019
Cited by 43 | Viewed by 5650
Abstract
The direct alcohol fuel cell is a kind of power generation device that directly converts the chemical energy of small molecule alcohols into electric energy. In this paper, the electro-oxidation behaviors of some typical alcohols (methanol, ethanol, ethylene glycol, n-propanol, 2-propanol, and glycerol) [...] Read more.
The direct alcohol fuel cell is a kind of power generation device that directly converts the chemical energy of small molecule alcohols into electric energy. In this paper, the electro-oxidation behaviors of some typical alcohols (methanol, ethanol, ethylene glycol, n-propanol, 2-propanol, and glycerol) over Pt, Pd, and Au electrodes were investigated in acidic, neutral, and alkaline media, respectively. By analyzing the activity information from a cyclic voltammetry (CV) method and some dynamic tests, several regularities were revealed in those electro-oxidation behaviors. Firstly, alkaline media is the best for the electro-oxidation of all these alcohols over Pt, Pd, and Au catalysts. Secondly, the hydrogen bond donation abilities (HBD) of different alcohols were found have a great relationship with the catalytic performance. In alkaline media, on Pt electrodes, the solute HBD is positively correlated with the ease of electrooxidation within the scope of this experiment. Contrarily, it is negatively correlated on Pd and Au electrodes. Additionally, for Pt catalysts in acidic and neutral media, the relationship becomes negative again as the HBD increases. Finally, the alcohol’s molecular structure properties were found to have a remarkably influence on the activity of different catalysts. Over the Pt electrode in alkaline media, the activation energy of methanol oxidation is 44.1 KJ/mol, and is obviously lower than the oxidation of other alcohols. Under similar conditions, the lowest activation energy was measured in the oxidation of n-propanol (14.4 KJ/mol) over the Pd electrode, and in the oxidation of glycerol (42.2 KJ/mol) over the Au electrode. Totally, among all these electrodes, Pt electrodes showed the best activities on the oxidation of C1 alcohol, Pd electrodes were more active on the oxidation of C2-3 monobasic alcohols, and Au electrodes were more active on the oxidation of polybasic alcohols. Full article
(This article belongs to the Special Issue Catalysis for Electro-oxidation of Ethanol & Methanol)
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15 pages, 4934 KiB  
Article
Pt–Ni Seed-Core-Frame Hierarchical Nanostructures and Their Conversion to Nanoframes for Enhanced Methanol Electro-Oxidation
by Shutang Chen, Haibin Wu, Jing Tao, Huolin Xin, Yimei Zhu and Jingyi Chen
Catalysts 2019, 9(1), 39; https://doi.org/10.3390/catal9010039 - 3 Jan 2019
Cited by 12 | Viewed by 4196
Abstract
Pt–Ni nanostructures are a class of important electrocatalysts for polymer electrolyte membrane fuel cells. This work reports a systematic study on the reaction mechanism of the formation of Pt–Ni seed-core-frame nanostructures via the seeded co-reduction method involving the Pt seeds and selective co-reduced [...] Read more.
Pt–Ni nanostructures are a class of important electrocatalysts for polymer electrolyte membrane fuel cells. This work reports a systematic study on the reaction mechanism of the formation of Pt–Ni seed-core-frame nanostructures via the seeded co-reduction method involving the Pt seeds and selective co-reduced deposition of Pt and Ni. The resultant structure consists of a branched Pt ultrafine seed coated with a pure Ni as rhombic dodecahedral core and selective deposition of Pt on the edges of the cores. Both the type of Pt precursor and the precursor ratio of Pt/Ni are critical factors to form the resulting shape of the seeds and eventually the morphology of the nanostructures. These complex hierarchical structures can be further graved into hollow Pt–Ni alloy nanoframes using acetic acid etching method. The larger surface area and higher number of low coordinate sites of the nanoframes facilitate the electrocatalytic activity and stability of Pt–Ni alloy for methanol oxidation as compared to their solid counterparts. This study elucidates the structural and compositional evolution of the complex nanoarchitectures and their effects on the electrocatalytic properties of the nanostructures. Full article
(This article belongs to the Special Issue Catalysis for Electro-oxidation of Ethanol & Methanol)
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