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Longitudinal Hierarchy Co3O4 Mesocrystals with High-dense Exposure Facets and Anisotropic Interfaces for Direct-Ethanol Fuel Cells

Hassen, Diab, El-Safty, Sherif, Tsuchiya, Koichi, Chatterjee, Abhijit, Elmarakbi, Ahmed, Shenashen, Mohamed. A. and Sakai, Masaru (2016) Longitudinal Hierarchy Co3O4 Mesocrystals with High-dense Exposure Facets and Anisotropic Interfaces for Direct-Ethanol Fuel Cells. Scientific Reports, 6 (1). ISSN 2045-2322

Item Type: Article

Abstract

Novel electrodes are needed for direct ethanol fuel cells with improved quality. Hierarchical engineering can produce catalysts composed of mesocrystals with many exposed active planes and multi-diffused voids. Here we report a simple, one-pot, hydrothermal method for fabricating Co 3 O 4 /carbon/substrate electrodes that provides control over the catalyst mesocrystal morphology (i.e., corn tubercle pellets or banana clusters oriented along nanotube domains, or layered lamina or multiple cantilevered sheets). These morphologies afforded catalysts with a high density of exposed active facets, a diverse range of mesopores in the cage interior, a window architecture, and vertical alignment to the substrate, which improved efficiency in an ethanol electrooxidation reaction compared with a conventional platinum/carbon electrode. On the atomic scale, the longitudinally aligned architecture of the Co 3 O 4 mesocrystals resulted in exposed low- and high-index single and interface surfaces that had improved electron transport and diffusion compared with currently used electrodes.

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More Information

Depositing User: Michelle Marshall

Identifiers

Item ID: 10698
Identification Number: https://doi.org/10.1038/srep24330
ISSN: 2045-2322
URI: http://sure.sunderland.ac.uk/id/eprint/10698
Official URL: https://doi.org/10.1038/srep24330

Users with ORCIDS

ORCID for Sherif El-Safty: ORCID iD orcid.org/0000-0001-5992-9744

Catalogue record

Date Deposited: 25 Apr 2019 09:49
Last Modified: 18 Aug 2021 20:05

Contributors

Author: Sherif El-Safty ORCID iD
Author: Diab Hassen
Author: Koichi Tsuchiya
Author: Abhijit Chatterjee
Author: Ahmed Elmarakbi
Author: Mohamed. A. Shenashen
Author: Masaru Sakai

University Divisions

Faculty of Technology

Subjects

Engineering

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