Special Issue "Metal Nanomaterials for Electrocatalysis"

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

Deadline for manuscript submissions: 31 October 2019.

Special Issue Editor

Guest Editor
Prof. Dr. Sang-Il Choi Website E-Mail
Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University 80 Daehak-ro, Buk-gu, Daegu 41566, Korea
Interests: shape-, size-, and composition-controlled synthesis of metal nanocrystals; electrocatalysis; polymer electrolyte membrane fuel cells; water electrolysis

Special Issue Information

Dear Colleagues,

Synthesis of novel metal nanomaterials has emerged as one of the leading topics of electrocatalysis in recent years. This great interest in nanomaterial arises not only from the enlargement of the catalytic surface area but also from the controllable composition, size, and morphology, possibly substantially improving the reaction efficiency and reducing the material cost. Accordingly, catalytic applications of the advanced metal nanomaterials are extensively explored in various electrochemical redox reactions, such as oxygen reduction, liquid fuel oxidation, hydrogen evolution, and oxygen evolution.

This special issue aims to explore the most recent advances of metal nanomaterials in the field of electrocatalysis. Such metal nanomaterials include, but are not limited to, metal oxides, metal chalcogenides, and perovskites.

Prof. Dr. Sang-Il Choi
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

  • polymer electrolyte membrane fuel cells
  • direct liquid fuel cells
  • water electrolysis
  • noble metal nanomaterials
  • non-noble metal nanomaterials
  • shape- and morphology-control
  • oxygen reduction
  • liquid fuel oxidation
  • hydrogen evolution
  • oxygen evolution

Published Papers

This special issue is now open for submission, see below for planned papers.

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: Electrochemical studies of Pd based anode catalysts in alkaline medium for direct glycerol fuel cells
Authors: Lutho Klaas1, Mmalewane Modibedi2, Mkhulu Mathe2, Lindiwe Khotseng*1
Abstract: The anode catalyst is one of the important parts of the direct alcohol fuel cell (DAFC); it is responsible for the alcohol oxidation reaction (AOR) that takes place at the anode side. Pd has been reported as a good alcohol oxidation reaction catalyst with good stability in alkaline solution. Better stability and activity have been reported for Pd alloyed catalysts when compared to Pd. This study investigates the best electrocatalyst for glycerol oxidation reaction (GOR) for the five in-house electrocatalysts, Pd, PdNi, PdNiO, PdMn3O4 and PdMn3O4NiO supported on multi walled carbon nanotubes (MWCNT) prepared using polyol method. Cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectrometry (EIS) and chronoamperometry (CA) were used for the electrochemical evaluation of the catalysts. HR-TEM and XRD techniques were used to determine the particle size and average particle size, respectively while EDS used to determine elemental composition. It was observed from CV that PdMn3O4 had the highest electroactive surface area (ECSA), the most stable catalyst towards glycerol oxidation with the fastest electron kinetics using chronoamperometry and electrochemical impedance spectrometry, respectively. LSV showed that PdNiO was the most electro-active catalyst towards glycerol oxidation. From XRD and HR-TEM studies, particle sizes were in the range of 3.37 and 10.06 nm with PdNiO having the smallest particles size.

Author: Prof. Dr. Sang-Il Choi
Affiliation: Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University 80 Daehak-ro, Buk-gu, Daegu 41566, Korea

Title: Multi-shelled CoS2-MoS2 hollow spheres as efficient bifunctional  electrocatalyst for overall water splitting
Author: Jinkwon Kim
Abstract: The exploration of highly efficient non-precious electrocatlysts is essential for water splitting devices. Herein, we synthesized CoS2-MoS2 multi-shelled hollow spheres (MHSs) as efficient electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) using a Schiff base coordination polymer(CP). Co-CP solid spheres were converted to Co3O4 MHSs by sintering in air. CoS2-MoS2 MHSs were obtained by a solvothermal reaction of Co3O4 MHSs and MoS42-. CoS2-MoS2 MHSs have a high specific surface area of 73.5 m2g-1. Due to the synergistic effect between the CoS2 and MoS2, the electrode of CoS2-MoS2 MHSs shows low overpotential of 109 mV with Tafel slope value of 52.0 mV dec-1 for HER. It also shows a small overpotential of 288 mV with Tafel slope value of 62.1 mV dec-1 for OER at current density of 10 mA cm-2

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