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@ARTICLE{Nong:858727,
      author       = {Nong, Hong Nhan and Reier, Tobias and Oh, Hyung-Suk and
                      Gliech, Manuel and Paciok, Paul and Vu, Thu Ha Thi and
                      Teschner, Detre and Heggen, Marc and Petkov, Valeri and
                      Schlögl, Robert and Jones, Travis and Strasser, Peter},
      title        = {{A} unique oxygen ligand environment facilitates water
                      oxidation in hole-doped {I}r{N}i{O}x core–shell
                      electrocatalysts},
      journal      = {Nature catalysis},
      volume       = {1},
      number       = {11},
      issn         = {2520-1158},
      address      = {[London]},
      publisher    = {Macmillan Publishers Limited, part of Springer Nature},
      reportid     = {FZJ-2018-07572},
      pages        = {841 - 851},
      year         = {2018},
      abstract     = {The electro-oxidation of water to oxygen is expected to
                      play a major role in the development of future
                      electrochemical energy conversion and storage technologies.
                      However, the slow rate of the oxygen evolution reaction
                      remains a key challenge that requires fundamental
                      understanding to facilitate the design of more active and
                      stable electrocatalysts. Here, we probe the local geometric
                      ligand environment and electronic metal states of
                      oxygen-coordinated iridium centres in nickel-leached
                      IrNi@IrOx metal oxide core–shell nanoparticles under
                      catalytic oxygen evolution conditions using operando X-ray
                      absorption spectroscopy, resonant high-energy X-ray
                      diffraction and differential atomic pair correlation
                      analysis. Nickel leaching during catalyst activation
                      generates lattice vacancies, which in turn produce uniquely
                      shortened Ir–O metal ligand bonds and an unusually large
                      number of d-band holes in the iridium oxide shell. Density
                      functional theory calculations show that this increase in
                      the formal iridium oxidation state drives the formation of
                      holes on the oxygen ligands in direct proximity to lattice
                      vacancies. We argue that their electrophilic character
                      renders these oxygen ligands susceptible to nucleophilic
                      acid–base-type O–O bond formation at reduced kinetic
                      barriers, resulting in strongly enhanced reactivities.},
      cin          = {PGI-5},
      ddc          = {540},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000449799200011},
      doi          = {10.1038/s41929-018-0153-y},
      url          = {https://juser.fz-juelich.de/record/858727},
}