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  Isolated Pd Sites as Selective Catalysts for Electrochemical and Direct Hydrogen Peroxide Synthesis

Ledendecker, M., Pizzutilo, E., Malta, G., Fortunato, G. V., Mayrhofer, K. J. J., Hutchings, G. J., et al. (2020). Isolated Pd Sites as Selective Catalysts for Electrochemical and Direct Hydrogen Peroxide Synthesis. ACS Catalysis, 10(10), 5928-5938. doi:10.1021/acscatal.0c01305.

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 Creators:
Ledendecker, Marc1, 2, Author              
Pizzutilo, Enrico1, Author              
Malta, Grazia3, Author              
Fortunato, Guilherme Vilalba1, 4, Author              
Mayrhofer, Karl Johann Jakob1, 5, 6, Author              
Hutchings, Graham J.7, Author              
Freakley, Simon J.8, Author              
Affiliations:
1Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
2Department of Technical Chemistry, Technical University Darmstadt, 64287 Darmstadt, Germany, ou_persistent22              
3Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K., ou_persistent22              
4Institute of Chemistry, Universidade Federal de Mato Grosso Do sul, Av. Senador Filinto Muller, 1555, Campo Grande MS, Brazil, ou_persistent22              
5Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany, ou_persistent22              
6Helmholtz-Institute Erlangen-Nuremberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstrasse 3, 91058 Erlangen, Germany, ou_persistent22              
7Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, UK, ou_persistent22              
8Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K., ou_persistent22              

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Free keywords: Additives; Catalyst selectivity; Chlorine compounds; Electrolytic reduction; Hydrogen peroxide; Metal halides; Nanoparticles; Oxidation; Oxygen; Oxygen reduction reaction; Peroxides; Synthesis (chemical), Direct synthesis; Electrocatalytic oxygen reduction; Electrochemical oxygen reduction; Halide promoters; Palladium nanoparticles; PD nano particle; Selective catalysts; Two-electron reduction, Palladium
 Abstract: Palladium nanoparticles have been studied extensively as catalysts for the direct synthesis of hydrogen peroxide, where selectivity remains a key challenge. Alloying Pd with other metals and using acid and halide promoters are commonly employed to increase H2O2 selectivity; however, the sites that can selectively produce H2O2 have not been identified and the role of these additives remains unclear. Here, we report the synthesis of atomically dispersed PdClx/C as a model catalyst for H2O2 production without the presence of extended Pd surfaces. We show that these isolated cationic Pd sites can form H2O2 with significantly higher selectivity than metallic Pd nanoparticles in both the reaction of H2 and O2 and the electrochemical oxygen reduction reaction. These results demonstrate that catalysts containing high populations of isolated Pd sites are selective catalysts for this two-electron reduction reaction and that the performance of materials in the direct synthesis reaction and electrocatalytic oxygen reduction reaction has many similarities. © 2020 American Chemical Society.

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Language(s): eng - English
 Dates: 2020-04-23
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/acscatal.0c01305
 Degree: -

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Title: ACS Catalysis
  Abbreviation : ACS Catal.
Source Genre: Journal
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Publ. Info: Washington, DC : ACS
Pages: - Volume / Issue: 10 (10) Sequence Number: - Start / End Page: 5928 - 5938 Identifier: ISSN: 2155-5435
CoNE: https://pure.mpg.de/cone/journals/resource/2155-5435