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@ARTICLE{Kante:1005453,
      author       = {Kante, Mohana V. and Weber, Moritz L. and Ni, Shu and van
                      den Bosch, Iris C. G. and van der Minne, Emma and Heymann,
                      Lisa and Falling, Lorenz J. and Gauquelin, Nicolas and
                      Tsvetanova, Martina and Cunha, Daniel M. and Koster, Gertjan
                      and Gunkel, Felix and Nemšák, Slavomír and Hahn, Horst
                      and Velasco Estrada, Leonardo and Baeumer, Christoph},
      title        = {{A} {H}igh-{E}ntropy {O}xide as {H}igh-{A}ctivity
                      {E}lectrocatalyst for {W}ater {O}xidation},
      journal      = {ACS nano},
      volume       = {17},
      number       = {6},
      issn         = {1936-0851},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2023-01482},
      pages        = {5329–5339},
      year         = {2023},
      abstract     = {High-entropy materials are an emerging pathway in the
                      development of high-activity (electro)catalysts because of
                      the inherent tunability and coexistence of multiple
                      potential active sites, which may lead to earth-abundant
                      catalyst materials for energy-efficient electrochemical
                      energy storage. In this report, we identify how the
                      multication composition in high-entropy perovskite oxides
                      (HEO) contributes to high catalytic activity for the oxygen
                      evolution reaction (OER), i.e., the key kinetically limiting
                      half-reaction in several electrochemical energy conversion
                      technologies, including green hydrogen generation. We
                      compare the activity of the (001) facet of
                      LaCr0.2Mn0.2Fe0.2Co0.2Ni0.2O3-δ with the parent compounds
                      (single B-site in the ABO3 perovskite). While the single
                      B-site perovskites roughly follow the expected volcano-type
                      activity trends, the HEO clearly outperforms all of its
                      parent compounds with 17 to 680 times higher currents at a
                      fixed overpotential. As all samples were grown as an
                      epitaxial layer, our results indicate an intrinsic
                      composition–function relationship, avoiding the effects of
                      complex geometries or unknown surface composition. In-depth
                      X-ray photoemission studies reveal a synergistic effect of
                      simultaneous oxidation and reduction of different transition
                      metal cations during the adsorption of reaction
                      intermediates. The surprisingly high OER activity
                      demonstrates that HEOs are a highly attractive,
                      earth-abundant material class for high-activity OER
                      electrocatalysts, possibly allowing the activity to be
                      fine-tuned beyond the scaling limits of mono- or bimetallic
                      oxides.},
      cin          = {PGI-7 / JARA-FIT},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {5233 - Memristive Materials and Devices (POF4-523)},
      pid          = {G:(DE-HGF)POF4-5233},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {36913300},
      UT           = {WOS:000953440900001},
      doi          = {10.1021/acsnano.2c08096},
      url          = {https://juser.fz-juelich.de/record/1005453},
}