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@ARTICLE{Derelli:594778,
      author       = {Derelli, Davide and Caddeo, Francesco and Frank, Kilian and
                      Krötzsch, Kilian and Ewerhardt, Patrick and Krüger, Marco
                      and Medicus, Sophie and Klemeyer, Lars and Skiba, Marvin and
                      Gutowski, Olof and Dippel, Ann-Christin and Parak, Wolfgang
                      J. and Nickel, Bert and Koziej, Dorota},
      title        = {{O}perando {X}-ray scattering elucidates the photocorrosion
                      mechanism of {C}u{B}i$_2${O}$_4$ films},
      reportid     = {PUBDB-2023-05955},
      year         = {2023},
      abstract     = {CuBi2O4 has recently emerged as a promising photocathode
                      for photo-electrochemical (PEC) water splitting. However,
                      its fast degradation under operation currently poses a limit
                      to its application. Here, we report a novel method to study
                      operando the semiconductor-electrolyte interface during PEC
                      operation by surface-sensitive high-energy X-ray scattering.
                      We find that a fast decrease in the generated photocurrents
                      correlates directly with the formation of a metallic Bi
                      phase. We further show that the slower formation of metallic
                      Cu, as well as the dissolution of the electrode in contact
                      with the electrolyte, further affect the CuBi$_2$O$_4$
                      activity and morphology. Our study provides a comprehensive
                      picture of the degradation mechanisms affecting
                      CuBi$_2$O$_4$ electrodes under operation and poses the
                      methodological basis to investigate the photocorrosion
                      processes affecting a wide range of PEC materials.},
      cin          = {DOOR ; HAS-User / FS-PET-D / UNI/PHY},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-PET-D-20190712
                      / $I:(DE-H253)UNI_PHY-20170505$},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)25},
      doi          = {10.26434/chemrxiv-2023-j1q9w},
      url          = {https://bib-pubdb1.desy.de/record/594778},
}