Rational strain engineering in delafossite oxides for highly efficient hydrogen evolution catalysis in acidic media

  title={Rational strain engineering in delafossite oxides for highly efficient hydrogen evolution catalysis in acidic media},
  author={Filip Podjaski and Daniel Weber and Siyuan Zhang and Leo Diehl and Roland Eger and Viola Duppel and Esther Alarc{\'o}n-Llad{\'o} and Gunther Richter and Frederik Haase and Anna Fontcuberta i Morral and Christina Scheu and Bettina V. Lotsch},
  journal={Nature Catalysis},
The rational design of hydrogen evolution reaction electrocatalysts that can compete with platinum is an outstanding challenge in the process of designing viable power-to-gas technologies. Here, we introduce delafossites as a family of hydrogen evolution reaction electrocatalysts in acidic media. We show that, in PdCoO 2 , the inherently strained Pd metal sublattice acts as a pseudomorphic template for the growth of a tensile-strained Pd-rich capping layer under reductive conditions. The… 

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