Special Issue "Catalytic Properties of Nanostructured Electrodic Materials"

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

Deadline for manuscript submissions: 30 November 2019.

Special Issue Editor

Guest Editor
Prof. Christian Durante Website E-Mail
Department of Chemical Sciences, University of Padova, Via Marzolo, 1 I-35131, Padova
Interests: electrocatalysis of small molecules; oxygen reduction reaction; carbon dioxide reduction reaction; carbon materials; electrosynthesis

Special Issue Information

Dear Colleagues,

Electrocatalysis of nanostructured materials is a well-consolidated research field, and it is, without any doubt, one of the hottest and fastest-growing areas, crosswise among several disciplines, including chemistry and materials science. The implementation of new synthetic strategies driven by a computational approach along with the setup of new in situ and in operando combined techniques have led to a faster and deeper understanding of the factors governing the electrocatalytic properties of materials at the nanoscale.

Electrode supports and active metal phases structured at the nano-level have been shown to deeply affect the activity, selectivity, and stability of an electrocatalyst. In this framework, the support texture and its surface functionalization are of primary importance, as well as the interaction with the active phase in the form of nanostructures of a different dimension, morphology, and chemistry. Therefore, the ability to trigger the electrode properties at the atomic level allows to decline different material in a plethora of applications. A lot has been done, but so far, nanostructured electrodes have opened up exciting new possibilities for future applications in a number of areas, including the energy conversion and storage field, bioelectrochemical and chemical sensors, as well as in environmental preservation and new fine chemicals synthesis. Thus, this Special Issue is particularly oriented at gathering together the most prominent research of electrocatalysis at nano-level, from fundamental to industrial application.

Prof. Christian Durante
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 papers will be 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 1600 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

  • Electrocatalysis
  • Nanostructured electrodes
  • DFT
  • MSI (metal support interaction)
  • Electrode mechanism
  • Pollutant degradation
  • Fuel cell
  • CO2 conversion
  • Electrocatalytic detection
  • Electrocatalysis of small molecules
  • In operando techniques
  • Raman spectroscopy
  • XPS spectroscopy

Published Papers (3 papers)

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Research

Open AccessArticle
Influence of Nanocrystalline Palladium Morphology on Alkaline Oxygen Reduction Kinetics
Catalysts 2019, 9(7), 566; https://doi.org/10.3390/catal9070566 - 26 Jun 2019
Abstract
The structure sensitivity of the alkaline oxygen reduction reaction (ORR) on palladium is of great interest as cost considerations drive the need to find a replacement for platinum catalysts. The kinetics of alkaline ORR were investigated on nanocrystalline palladium (Pd) films with domain [...] Read more.
The structure sensitivity of the alkaline oxygen reduction reaction (ORR) on palladium is of great interest as cost considerations drive the need to find a replacement for platinum catalysts. The kinetics of alkaline ORR were investigated on nanocrystalline palladium (Pd) films with domain sizes between 14 and 30 nm that were synthesized by electrodeposition from aqueous electrolytes. Ten Pd films were prepared under varying electrodeposition parameters leading to each having a unique texture and morphology. The sensitivity of initial alkaline ORR kinetics to the Pd surface structure was evaluated by measuring the kinetic current density and number of electrons transferred for each film. We show through scanning electron microscopy (SEM), x-ray diffraction (XRD), atomic force microscopy (AFM), and voltammetry from rotating disc electrodes (RDEs) that the fastest alkaline ORR kinetics are found on Pd surfaces with high surface roughness, which themselves are composed of fine grains. Such a study is useful for developing membrane electrode assemblies (MEAs) based on directly electrodepositing catalyst onto a conductive diffusion layer. Full article
(This article belongs to the Special Issue Catalytic Properties of Nanostructured Electrodic Materials)
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Open AccessCommunication
Effect of Structure-Controlled Ruthenium Oxide by Nanocasting in Electrocatalytic Oxygen and Chlorine Evolution Reactions in Acidic Conditions
Catalysts 2019, 9(6), 549; https://doi.org/10.3390/catal9060549 - 19 Jun 2019
Abstract
RuO2 has been used for various applications because of its good catalytic properties. To further improve its electrocatalytic properties, we used a nanocasting technique. By using this technique, we obtained structure-controlled (SC) RuO2 with a high surface area and an ordered [...] Read more.
RuO2 has been used for various applications because of its good catalytic properties. To further improve its electrocatalytic properties, we used a nanocasting technique. By using this technique, we obtained structure-controlled (SC) RuO2 with a high surface area and an ordered porous structure, which created enhanced electrocatalytic properties over commercial RuO2 nanoparticles for both oxygen and chlorine evolution reactions. Full article
(This article belongs to the Special Issue Catalytic Properties of Nanostructured Electrodic Materials)
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Open AccessArticle
Tuning Sn-Cu Catalysis for Electrochemical Reduction of CO2 on Partially Reduced Oxides SnOx-CuOx-Modified Cu Electrodes
Catalysts 2019, 9(5), 476; https://doi.org/10.3390/catal9050476 - 22 May 2019
Abstract
Copper-based bimetallic catalysts have been recently showing promising performance for the selective electrochemical reduction of CO2. In this work, we successfully fabricated the partially reduced oxides SnOx, CuOx modified Cu foam electrode (A-Cu/SnO2) through an electrodeposition-annealing-electroreduction approach. Notably, in [...] Read more.
Copper-based bimetallic catalysts have been recently showing promising performance for the selective electrochemical reduction of CO2. In this work, we successfully fabricated the partially reduced oxides SnOx, CuOx modified Cu foam electrode (A-Cu/SnO2) through an electrodeposition-annealing-electroreduction approach. Notably, in comparison with the control electrode (Cu/SnO2) without undergoing annealing step, A-Cu/SnO2 exhibits a significant enhancement in terms of CO2 reduction activity and CO selectivity. By investigating the effect of the amount of the electrodeposited SnO2, it is found that A-Cu/SnO2 electrodes present the characteristic Sn-Cu synergistic catalysis with a feature of dominant CO formation (CO faradaic efficiency, 70~75%), the least HCOOH formation (HCOOH faradaic efficiency, <5%) and the remarkable inhibition of hydrogen evolution reaction. In contrast, Cu/SnO2 electrodes exhibit a SnO2 coverage-dependent catalysis—a shift from CO selectivity to HCOOH selectivity with the increasing deposited SnO2 on Cu foam. The different catalytic performance between Cu/SnO2 and A-Cu/SnO2 might be attributed to the different content of Cu atoms in SnO2 layer, which may affect the density of Cu-Sn interface on the surface. Our work provides a facile annealing-electroreduction strategy to modify the surface composition for understanding the metal effect towards CO2 reduction activity and selectivity for bimetallic Cu-based electrocatalysts. Full article
(This article belongs to the Special Issue Catalytic Properties of Nanostructured Electrodic Materials)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Synthesis of porous hollow La0.5Sr0.5MnO3 nanospheres as an electrocatalyst for oxygen reduction reaction in alkaline media
Author: Qianqian Ji, Lei Bi, Jintao Zhang, Haijie Cao and Xiu Song Zhao
Affiliation: Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
Abstract: Porous hollow La0.5Sr0.5MnO3 perovskite oxide nanospheres were synthesized by using carbon spheres as template. The electrochemical properties of the samples in the oxygen reduction reaction in a 0.1 M KOH solution were studied. Among the samples investigated, the one  obtained at a sintering temperature of 700 oC exhibited an onset potential of -0.005 V (vs Hg/HgO) and limiting current density of 6.48 mA cm-2, which are comparable to that of a commercial Pt/C catalyst. However, the selectivity towards methanol and stability of the catalyst were observed to be better than that of the commercial Pt/C catalyst. The porous hollow La0.5Sr0.5MnO3 perovskite oxide catalyst holds a great promise for applications in alkaline fuel cells and metal-air batteries.

 

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