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  Pd supported on Carbon Nitride Boosts the Direct Hydrogen Peroxide Synthesis

Arrigo, R., Schuster, M. E., Abate, S., Giorgianni, G., Centi, G., Perathoner, S., et al. (2016). Pd supported on Carbon Nitride Boosts the Direct Hydrogen Peroxide Synthesis. ACS Catalysis, 6(10), 6959-6966. doi:10.1021/acscatal.6b01889.

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 Creators:
Arrigo, Rosa1, 2, Author              
Schuster, Manfred Erwin1, Author              
Abate, Salvatore3, Author
Giorgianni, Gianfranco3, Author
Centi, Gabriele3, Author
Perathoner, Siglinda3, Author
Wrabetz, Sabine1, Author              
Pfeifer, Verena1, Author              
Antonietti, Markus4, Author
Schlögl, Robert1, 2, Author              
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany, ou_persistent22              
3Università degli Studi di Messina, V.le F. Stagno D'Alcontres 31, 98166 Messina, Italy, ou_persistent22              
4Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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 Abstract: Herein, the development of an improved Pd on carbon nitride catalyst for the direct H2O2 synthesis from the elements is reported. Microcalorimetric CO chemisorption is used for characterizing the chemical speciation of the Pd selective and unselective sites. Selectivity trends among the samples suggest that a bare metal surface with a differential heat of CO chemisorption ranging between 140 and 120 kJ*mol-1 is responsible for the total O2 hydrogenation, while a maximum threshold value of differential heat of CO chemisorption of approximately 70 kJ*mol-1 is necessary for the partial hydrogenation of O2 to H2O2. Such low differential heat of CO chemisorption indicates a low exposed metallic Pd surface subjected to electron-withdrawing from the surrounding ligands, i.e. the N functional group on the carbon support. With respect to N-containing carbon nanotubes, carbon nitrides provide: higher concentration of N sites; a flexible network of π-conjugated polymeric subunits with sp3 linking subunits; a flakes-like morphology with high exposure of reactive C edge terminations. This results in a more effective kinetic stabilization of the electronically modified Pd species.

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 Dates: 2016-07-062016-09-012016-10-07
 Publication Status: Published in print
 Pages: 18
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acscatal.6b01889
 Degree: -

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Title: ACS Catalysis
  Abbreviation : ACS Catal.
Source Genre: Journal
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Publ. Info: Washington, DC : ACS
Pages: 8 Volume / Issue: 6 (10) Sequence Number: - Start / End Page: 6959 - 6966 Identifier: Other: 2155-5435
CoNE: https://pure.mpg.de/cone/journals/resource/2155-5435