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@ARTICLE{Wohlgemuth:908252,
      author       = {Wohlgemuth, Marcus and Weber, Moritz and Heymann, Lisa and
                      Baeumer, Christoph and Gunkel, Felix},
      title        = {{A}ctivity-{S}tability {R}elationships in {O}xide
                      {E}lectrocatalysts for {W}ater {E}lectrolysis},
      journal      = {Frontiers in Chemistry},
      volume       = {10},
      issn         = {2296-2646},
      address      = {Lausanne},
      publisher    = {Frontiers Media},
      reportid     = {FZJ-2022-02486},
      pages        = {913419},
      year         = {2022},
      abstract     = {The oxygen evolution reaction (OER) is one of the key
                      kinetically limiting half reactions in electrochemical
                      energy conversion. Model epitaxial catalysts have emerged as
                      a platform to identify structure-function-relationships at
                      the atomic level, a prerequisite to establish advanced
                      catalyst design rules. Previous work identified an inverse
                      relationship between activity and the stability of noble
                      metal and oxide OER catalysts in both acidic and alkaline
                      environments: The most active catalysts for the anodic OER
                      are chemically unstable under reaction conditions leading to
                      fast catalyst dissolution or amorphization, while the most
                      stable catalysts lack sufficient activity. In this
                      perspective, we discuss the role that epitaxial catalysts
                      play in identifying this activity-stability-dilemma and
                      introduce examples of how they can help overcome it. After a
                      brief review of previously observed
                      activity-stability-relationships, we will investigate the
                      dependence of both activity and stability as a function of
                      crystal facet. Our experiments reveal that the inverse
                      relationship is not universal and does not hold for all
                      perovskite oxides in the same manner. In fact, we find that
                      facet-controlled epitaxial La0.6Sr0.4CoO3-δ catalysts
                      follow the inverse relationship, while for LaNiO3-δ, the
                      (111) facet is both the most active and the most stable. In
                      addition, we show that both activity and stability can be
                      enhanced simultaneously by moving from La-rich to Ni-rich
                      termination layers. These examples show that the previously
                      observed inverse activity-stability-relationship can be
                      overcome for select materials and through careful control of
                      the atomic arrangement at the solid-liquid interface. This
                      realization re-opens the search for active and stable
                      catalysts for water electrolysis that are made from
                      earth-abundant elements. At the same time, these results
                      showcase that additional stabilization via material design
                      strategies will be required to induce a general departure
                      from inverse stability-activity relationships among the
                      transition metal oxide catalysts to ultimately grant access
                      to the full range of available oxides for OER catalysis.},
      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       = {35815219},
      UT           = {WOS:000827246200001},
      doi          = {10.3389/fchem.2022.913419},
      url          = {https://juser.fz-juelich.de/record/908252},
}