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@ARTICLE{Han:893904,
      author       = {Han, Lijuan and González-Cobos, Jesús and
                      Sánchez-Molina, Irene and Giancola, Stefano and Folkman,
                      Scott J. and Tang, Pengyi and Heggen, Marc and
                      Dunin-Borkowski, Rafal E. and Arbiol, Jordi and Giménez,
                      Sixto and Galan-Mascaros, Jose Ramon},
      title        = {{C}obalt {H}exacyanoferrate as a {S}elective and {H}igh
                      {C}urrent {D}ensity {F}ormate {O}xidation {E}lectrocatalyst},
      journal      = {ACS applied energy materials},
      volume       = {3},
      number       = {9},
      issn         = {2574-0962},
      address      = {Washington, DC},
      publisher    = {ACS Publications},
      reportid     = {FZJ-2021-02916},
      pages        = {9198 - 9207},
      year         = {2020},
      abstract     = {Herein we report the selectivity, stability, and
                      electrochemical characterization of cobalt hexacyanoferrate,
                      the Co–Fe Prussian Blue derivative (CoFePB), as a
                      formate/formic acid oxidation electrocatalyst in aqueous
                      media. CoFePB is able to quantitatively catalyze $(100\%$
                      Faradaic efficiency within less than $8\%$ standard error at
                      pH 5) the electrochemical oxidation of formate to CO2 over a
                      pH range of 1–13. This quantitative formate
                      elecrooxidation is possible due to the exclusive selectivity
                      of the catalyst in a wide potential window (from ca. 1.2 to
                      1.7 V vs RHE), where no other substrate in aqueous
                      conditions is activated: neither other organic molecules,
                      such as alcohols or acids, nor water itself. CoFePB is one
                      of the first heterogeneous noble-metal-free catalysts
                      reported for the electrooxidation of small hydrocarbon
                      molecules. Importantly, the catalyst showed a very high
                      tolerance against surface poisoning during the reaction, as
                      supported by the cyclic voltammetry and electrochemical
                      impedance spectroscopy data, thereby allowing CoFePB to
                      operate at greater current density than state-of-the-art
                      noble metal catalysts. For example, we observed that CoFePB
                      is able to achieve a formate oxidation current ∼10 mA
                      cm–2 at pH 5, 0.4 M formate at 1.4 V vs RHE, whereas a Pt
                      disk and $Pd(5\%)/C$ electrodes had currents of 0.4 and 1.4
                      mA cm–2, respectively, under identical conditions. The
                      remarkable selectivity, stability, and high current density
                      of CoFePB, in contrast to state-of-the-art catalysts based
                      on platinum-group metals, is an important step in the search
                      for inexpensive earth-abundant materials for oxidation of
                      organic molecules for use in liquid fuel cells or for
                      selective organic molecule sensors. Furthermore, because
                      CoFePB is not poisoned by intermediates and can achieve
                      higher current density than Pt or Pd, improvement of the
                      catalyst onset potential can lead to higher power density
                      formate oxidation fuel cells using earth-abundant metals
                      than with Pt or Pd.},
      cin          = {ER-C-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {5351 - Platform for Correlative, In Situ and Operando
                      Characterization (POF4-535)},
      pid          = {G:(DE-HGF)POF4-5351},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000576676900115},
      doi          = {10.1021/acsaem.0c01548},
      url          = {https://juser.fz-juelich.de/record/893904},
}