123994 20241125101129.0 doi 10.1016/j.jelechem.2022.117114 sideral 132526 ART-2023-132526 eng Ansón-Casaos, A. Stability of a pyrimidine-based dye-sensitized TiO2 photoanode in sacrificial electrolytes 2023 Access copy available to the general public Unrestricted Dye sensitization of semiconductor metal oxides aims to extend the light absorption range into the visible region, of particular interest for their use as photoanodes in photoelectrochemical (PEC) water splitting. Organic dyes, however, suffer from limited chemical stability when they are exposed to constant potential and irradiation in aqueous media. Thus, in this work, we evaluate a novel metal-free donor-π-acceptor (D-π-A) dye (AT-Pyri), demonstrating significant sensitization of film photoanodes based on TiO2 nanoparticles. Among a series of tested sacrificial agents, the addition of triethanolamine (TEOA) to the sodium sulphate electrolyte prevents the degradation of AT-Pyri even after several hours of operation. Combining two sacrificial agents (methanol and TEOA) results in a synergetic improvement of the PEC water-splitting activity. Notably, the stabilization of the AT-Pyri photoanode is accompanied by a substantial increase in the photocurrent over the reference TiO2 photoanode, while the associated spikes in transient photocurrent measurements disappear. info:eu-repo/grantAgreement/ES/DGA-FEDER/E47-20R info:eu-repo/grantAgreement/ES/DGA/T03-20R info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-104272RB-C52/AEI/10.13039/501100011033 info:eu-repo/grantAgreement/ES/MICINN/PID2019-104307GB-I00-AEI-10.13039-501100011033 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.1 2023 CHEMISTRY, ANALYTICAL 25 / 106 = 0.236 2023 Q1 T1 ELECTROCHEMISTRY 17 / 45 = 0.378 2023 Q2 T2 0.755 2023 Analytical Chemistry 2023 Q1 Chemical Engineering (miscellaneous) 2023 Q1 Electrochemistry 2023 Q2 7.8 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Martínez-Barón, C. Angoy-Benabarre, S. Hernández-Ferrer, J. Benito, A.M. Maser, W.K. Blesa, M.J. Universidad de Zaragoza (orcid)0000-0001-7193-1732 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 929 (2023), 117114 [8 pp.] J. electroanal. chem. JOURNAL OF ELECTROANALYTICAL CHEMISTRY 1572-6657 2025574 http://zaguan.unizar.es/record/123994/files/texto_completo.pdf Versión publicada 2514617 http://zaguan.unizar.es/record/123994/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:123994 articulos driver 2024-11-22-11:58:29 ARTICLE