Axially oriented tubercle vein and X-crossed sheet of N-Co3O4@C hierarchical mesoarchitectures as potential heterogeneous catalysts for methanol oxidation reaction

Shenashen, Mohamed A., Hassen, Diab, El-Safty, Sherif A., Isago, Hiroaki, Elmarakbi, Ahmed and Yamaguchi, Hitoshi (2017) Axially oriented tubercle vein and X-crossed sheet of N-Co3O4@C hierarchical mesoarchitectures as potential heterogeneous catalysts for methanol oxidation reaction. Chemical Engineering Journal, 313. pp. 83-98. ISSN 1385-8947

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Official URL: http://dx.doi.org/10.1016/j.cej.2016.12.003

Abstract

The ever-growing demand for environmentally friendly and efficient energy systems has stimulated significant efforts for the design of advanced electroactive fabrics. This paper reports facile control over heterogeneous mesoarchitectures of N-Co3O4@C unit blocks oriented along the c-axis arch. Three basic types of nanoscale architectures, namely, nanorod pellets (NRPs), nanoneedles (NNs), and crossed-X nanosheets (X-NSs), can be built in a vertical fashion along the c-axis orientations. The atomic structures of the developed N-Co3O4@C-NRP, NN, and X-NS catalysts were dominant along the dense exposure {1 1 2} plane, low-index crystal {0 0 1}, and {1 1 1} facets, respectively. Among all the nanoscale architectures, the NRPs revealed superior methanol oxidation reaction (MOR) in terms of oxidation current and onset potential, indicating the key role of the top-Co3+sites along the dense exposure crystal {1 1 2} facet. Results indicate that the heterogeneous N-Co3O4@C-NRP catalyst showed efficient electrochemical reactions and better long-term stability than commercial Pt/C catalyst.

Item Type: Article
Uncontrolled Keywords: Hierarchical mesoarchitecture; N-Co3O4@C; Fuel cell; Methanol oxidation; Electrochemical
Subjects: F100 Chemistry
H300 Mechanical Engineering
J400 Polymers and Textiles
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 05 Oct 2018 15:13
Last Modified: 05 Oct 2018 15:13
URI: http://nrl.northumbria.ac.uk/id/eprint/36096

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