Journal article

Publication year: 2017

Pages: 2403-2411

Journal: ACS Catalysis

Volume number: 7

Issue number: 4

DOI Link: https://doi.org/10.1021/acscatal.6b03415

Publisher: American Chemical Society

Abstract: 

Ultrathin single-crystalline RuO2(110) films supported on Ru(0001) are employed as model electrodes to extract kinetic information about the industrially important chlorine evolution reaction (CER) in a 5M concentrated NaCl solution under well-defined electrochemical conditions and variable temperatures. A combination of chronoamperometry (CA) and online electrochemical mass spectrometry (OLEMS) experiments provides insight into the selectivity issue: At pH = 0.9, the CER dominates over oxygen evolution, whereas at pH = 3.5, oxygen evolution and other parasitic side reactions contribute mostly to the total current density. From temperature-dependent CA data for pH = 0.9, we determine the apparent free activation energy of the CER over RuO2(110) to be 0.91 eV, which compares reasonably well with the theoretical value of 0.79 eV derived from first-principles microkinetics. The experimentally determined apparent free activation energy of 0.91 eV is considered as a benchmark for assessing future improved theoretical modeling from first principles.

Harvard Citation style: Sohrabnejad-Eskan, I., Goryachev, A., Exner, K., Kibler, L., Hensen, E., Hofmann, J., et al. (2017) Temperature-Dependent Kinetic Studies of the Chlorine Evolution Reaction over RuO2(110) Model Electrodes, ACS Catalysis, 7(4), pp. 2403-2411. https://doi.org/10.1021/acscatal.6b03415

APA Citation style: Sohrabnejad-Eskan, I., Goryachev, A., Exner, K., Kibler, L., Hensen, E., Hofmann, J., & Over, H. (2017). Temperature-Dependent Kinetic Studies of the Chlorine Evolution Reaction over RuO2(110) Model Electrodes. ACS Catalysis. 7(4), 2403-2411. https://doi.org/10.1021/acscatal.6b03415