%0 Journal Article %1 noauthororeditor %A Reiser, Christopher %A Keßler, Philipp %A Kamp, Martin %A Jovic, Vedran %A Moser, Simon %D 2023 %I American Chemical Society %J J. Phys. Chem. C %K d %N 7 %P 3682-3688 %R 10.1021/acs.jpcc.2c07217 %T Specific capacitance of RuO$_2$(110) depends sensitively on surface order %U https://doi.org/10.1021/acs.jpcc.2c07217 %V 127 %X We report the specific capacitance, Cs, of variously ordered RuO2(110) surfaces measured in a 1 M H2SO4 electrolyte with unprecedented precision. Employing ∼10 nm thick, atomically flat epitaxial RuO2 films along with a geometric surface area-controlled electrochemical cell, we determine an upper limit of Cs = (35.35 ± 0.53) μFcm–2 of the idealized, i.e., well-ordered and stoichiometric RuO2(110) surface by electrochemical impedance spectroscopy (EIS) and scan-rate-dependent cyclic voltammetry. We demonstrate, however, that a slight decrease in surface quality immediately translates into pronounced cyclo-voltammetric differences and a significant increase of Cs. This needs to be considered when determining electrochemically active surface areas (ECSAs) of geometrically ill-defined RuO2 catalysts─a benchmark to measure electrochemical performance─from their measured double-layer capacitance.

@article{noauthororeditor, abstract = {We report the specific capacitance, Cs, of variously ordered RuO2(110) surfaces measured in a 1 M H2SO4 electrolyte with unprecedented precision. Employing ∼10 nm thick, atomically flat epitaxial RuO2 films along with a geometric surface area-controlled electrochemical cell, we determine an upper limit of Cs = (35.35 ± 0.53) μFcm–2 of the idealized, i.e., well-ordered and stoichiometric RuO2(110) surface by electrochemical impedance spectroscopy (EIS) and scan-rate-dependent cyclic voltammetry. We demonstrate, however, that a slight decrease in surface quality immediately translates into pronounced cyclo-voltammetric differences and a significant increase of Cs. This needs to be considered when determining electrochemically active surface areas (ECSAs) of geometrically ill-defined RuO2 catalysts─a benchmark to measure electrochemical performance─from their measured double-layer capacitance.}, added-at = {2023-04-06T15:45:18.000+0200}, author = {Reiser, Christopher and Keßler, Philipp and Kamp, Martin and Jovic, Vedran and Moser, Simon}, biburl = {https://www.bibsonomy.org/bibtex/2b2af2ec6a1b91c7091ec1fe1686808d7/ctqmat}, day = 13, description = {Specific capacitance of RuO2(110) depends sensitively on surface order}, doi = {10.1021/acs.jpcc.2c07217}, interhash = {62fec174d0fc4066125cf6900e33bb7b}, intrahash = {b2af2ec6a1b91c7091ec1fe1686808d7}, journal = {J. Phys. Chem. C}, keywords = {d}, month = {02}, number = 7, pages = {3682-3688}, publisher = {American Chemical Society}, timestamp = {2023-10-18T10:59:17.000+0200}, title = {Specific capacitance of RuO$_{\mathbf{2}}$(110) depends sensitively on surface order}, url = {https://doi.org/10.1021/acs.jpcc.2c07217}, volume = 127, year = 2023 }