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  New Insights from Microcalorimetry on the FeOx/CNT-Based Electrocatalysts Active in the Conversion of CO2 to Fuels

Arrigo, R., Schuster, M. E., Wrabetz, S., Girgsdies, F., Tessonnier, J.-P., Centi, G., et al. (2012). New Insights from Microcalorimetry on the FeOx/CNT-Based Electrocatalysts Active in the Conversion of CO2 to Fuels. ChemSusChem: chemistry & sustainability, energy & materials, 5(3), 577-586. doi:10.1002/cssc.201100641.

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 Creators:
Arrigo, Rosa1, Author           
Schuster, Manfred Erwin1, Author           
Wrabetz, Sabine1, Author           
Girgsdies, Frank1, Author           
Tessonnier, Jean-Philippe1, 2, Author           
Centi, Gabriele3, Author
Perathoner, Siglinda3, Author
Su, Dang Sheng1, 4, Author           
Schlögl, Robert1, Author           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Department of Chemical Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716 (USA), ou_persistent22              
3Department of Industrial Chemistry and Materials Engineering, University of Messina, V.le F. Stagno d’Alcontres, 31, 98166 Messina (Italy), ou_persistent22              
4Shenyang National Laboratory for Materials Science Institute of Metal Research, Chinese Academy of Science, ou_persistent22              

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Free keywords: carbon dioxide; electrocatalysis; iron; nanotubes; reduction
 Abstract: Fe oxide nanoparticles show enhanced electrocatalytic performance in the reduction of CO2 to isopropanol when deposited on an N-functionalized carbon nanotube (CNT) support rather than on a pristine or oxidized CNT support. XRD and high-resolution TEM were used to investigate the nanostructure of the electrocatalysts, and CO2 adsorptive microcalorimetry was used to study the chemical nature of the interaction of CO2 with the surface sites. Although the particles always present the same Fe3O4 phase, their structural anisotropy and size inhomogeneity are consequences of the preparation method of the carbon surface. Two types of chemisorption sites have been determined by using microcalorimetry: irreversible sites (280 kJ mol−1) at the uncoordinated sites of the facets and reversible sites (120 kJ mol−1) at the hydrated oxide surface of the small nanoparticles. N-Functionalization of the carbon support is advantageous, as it causes the formation of small nanoparticles, which are highly populated by reversible chemisorbing sites. These characteristic features correlate with a higher electrocatalytic performance.

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Language(s): eng - English
 Dates: 2012-02-282012-03-12
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: DOI: 10.1002/cssc.201100641
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Title: ChemSusChem : chemistry & sustainability, energy & materials
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 5 (3) Sequence Number: - Start / End Page: 577 - 586 Identifier: Other: 1864-5631
CoNE: https://pure.mpg.de/cone/journals/resource/1864-5631