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  Controlled Doping of Electrocatalysts through Engineering Impurities

Kim, S.-H., Yoo, S.-H., Shin, S., El-Zoka, A., Kasian, O., Lim, J., et al. (2022). Controlled Doping of Electrocatalysts through Engineering Impurities. Advanced Materials, 2203030. doi:10.1002/adma.202203030.

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Controlled Doping of Electrocatalysts through Engineering Impurities.pdf (Publisher version), 5MB
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 Creators:
Kim, Se-Ho1, 2, Author              
Yoo, Su-Hyun3, Author              
Shin, Sangyong4, Author
El-Zoka, Ayman1, 2, Author              
Kasian, Olga5, 6, Author              
Lim, Joohyun7, 8, Author              
Jeong, Jiwon7, Author              
Scheu, Christina7, Author              
Neugebauer, Joerg3, Author              
Lee, Hyunjoo4, Author
Todorova, Mira3, Author              
Gault, Baptiste1, 2, Author              
Affiliations:
1Atom Probe Tomography, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863384              
2Hydrogen in Energy Materials, Project Groups, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3291873              
3Computational Materials Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863337              
4Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141 Republic of Korea, ou_persistent22              
5Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
6Helmholtz Zentrum Berlin, Helmholtz-Institute Erlangen-Nürnberg, 14109 Berlin, Germany, ou_persistent22              
7Nanoanalytics and Interfaces, Independent Max Planck Research Groups, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_2054294              
8Department of Chemistry, Kangwon National University 24341 Chuncheon, Republic of Korea, ou_persistent22              

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 Abstract: Fuel cells recombine water from H-2 and O-2 thereby can power, for example, cars or houses with no direct carbon emission. In anion-exchange membrane fuel cells (AEMFCs), to reach high power densities, operating at high pH is an alternative to using large volumes of noble metals catalysts at the cathode, where the oxygen-reduction reaction occurs. However, the sluggish kinetics of the hydrogen-oxidation reaction (HOR) hinders upscaling despite promising catalysts. Here, the authors observe an unexpected ingress of B into Pd nanocatalysts synthesized by wet-chemistry, gaining control over this B-doping, and report on its influence on the HOR activity in alkaline conditions. They rationalize their findings using ab initio calculations of both H- and OH-adsorption on B-doped Pd. Using this "impurity engineering" approach, they thus design Pt-free catalysts as required in electrochemical energy conversion devices, for example, next generations of AEMFCs, that satisfy the economic and environmental constraints, that is, reasonable operating costs and long-term stability, to enable the "hydrogen economy."

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Language(s): eng - English
 Dates: 2022-05-052022
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/adma.202203030
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Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: 2203030 Start / End Page: - Identifier: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855