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@INPROCEEDINGS{Hecker:909864,
      author       = {Hecker, Burkhard and Robens, Elisabeth and Kungl, Hans and
                      Tempel, Hermann and Eichel, Rüdiger-A.},
      title        = {{T}uning the {S}electivity for the {CO}2 {R}eduction
                      towards {CO} through specific {S}ynthesis of {S}ilver
                      {C}atalysts with different {M}orphologies},
      reportid     = {FZJ-2022-03477},
      year         = {2022},
      abstract     = {The aimed reduction of fossil carbon sources in our society
                      does not only includes fossil fuels but also carbon-based
                      chemicals for further production processes. A promising
                      alternative source for these chemicals is the
                      electrochemical reduction of carbon dioxide. By using
                      electrical energy from renewable sources, this process can
                      be ecologically and economically beneficial. [1,2]Depending
                      on the cathode material and the local reaction environment,
                      different reduction products of carbon dioxide are produced.
                      Furthermore, hydrogen can evolve in a competitive reaction.
                      Therefore, it is of great interest to develop cathode
                      catalysts that show good selectivity for the desired
                      products as well as high activity and stability during
                      operation. [2,3]In our study, we compare the performance of
                      four different silver materials by their respective activity
                      and selectivity towards carbon monoxide, hydrogen and
                      formate at different electrochemical potentials. The
                      materials were synthesized by electroless silver deposition
                      and intensively characterized by SEM, EDX, HR-TEM, XRD and
                      Pb-UPD to gain information about the morphology on different
                      scales. In the second step, the materials were tested as
                      cathode catalysts during the CO2 reduction and the products
                      were quantified via GC and IEC. It was shown, that silver
                      materials containing more reactive edges and controlled
                      orientations of their surface atoms are beneficial at high
                      potentials and low current densities. On the other hand, at
                      low potentials and high current densities, the mass
                      transport gets more important leading to the increased
                      formation of formate at silver materials at which the mass
                      transport is limited in some regions.Our collected results
                      thus show in detail how the electrochemical reaction is
                      affected by the morphology of the synthesized silver
                      structures. The gained knowledge is relevant not only for
                      the production of carbon monoxide at silver cathodes but
                      also for more complex reactions. For example, it is known
                      that structures with limited mass transport can be
                      beneficial for electrochemical reduction of carbon dioxide
                      towards propanol at copper surfaces. [4] Therefore, the
                      gained knowledge can be used to design and improve further
                      catalyst materials.Literature:[1] Jordaan, Sarah M., Nature
                      Catalysis 2021, 4.11, 915-920. [2] Garg, Sahil, Journal of
                      Materials Chemistry A 8.4 (2020): 1511-1544. [3] Nwabara,
                      Uzoma O., ChemSusChem 13.5 (2020): 855-875. [4] Zhuang,
                      Tao-Tao, Nature Catalysis 1.12 (2018): 946-951.},
      month         = {Sep},
      date          = {2022-09-27},
      organization  = {GDCh Electrochemistry Berlin 2022,
                       Berlin (Germany), 27 Sep 2022 - 30 Sep
                       2022},
      subtyp        = {After Call},
      cin          = {IEK-9},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {1221 - Fundamentals and Materials (POF4-122) / 1232 -
                      Power-based Fuels and Chemicals (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1221 / G:(DE-HGF)POF4-1232},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/909864},
}