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Title (Primary) Platinized titanium as alternative cost-effective anodes for the efficient Kolbe electrolysis in aqueous electrolyte solutions
Author Neubert, K.; Schmidt, M.; Harnisch, F.;
Journal ChemSusChem
Year 2021
Department ISOBIO; UMB;
Volume 14
Issue 15
Language englisch;
Supplements https://chemistry-europe.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fcssc.202100854&file=cssc202100854-s1-Supporting_information_Neubert_etal.pdf
Keywords electrobiorefineries; drop-in fuel; power-to-fuel; power-to-chemicals; electroorganic synthesis
UFZ wide themes ProVIS;
Abstract Five commercial materials were assessed for electrochemical conversion of n -hexanoic acid by Kolbe electrolysis. Platinized titanium was best performing achieving a Coulombic efficiency (CE) of 93.1± 6.7%(n = 6) for the degradation of n -hexanoic acid and 48.3±3.2%(n = 6) for the production of n -decane which is close to the performance of pure platinum (89.7±14.4% and 55.5±3.5%; n = 6). Per mole n -hexanoic acid 56.7 mL liquid fuel is produced converting to an energy demand of 6.66 kWh and 1.22 € per liter. Using optical profilometry and SEM coupled with EDX it is shown that degree of coverage of the titanium surface with platinum plays the most important role. An uncovered surface of as little as 1 to 3% already leads to a deterioration of the CE of ~50%. Using platinized titanium requires >36 times less capex at only <10% increased opex; an electrode life time of 10.000h can be expected.
ID 24693
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24693
Neubert, K., Schmidt, M., Harnisch, F. (2021):
Platinized titanium as alternative cost-effective anodes for the efficient Kolbe electrolysis in aqueous electrolyte solutions
ChemSusChem 14 (15), 3097 - 3109