127769 20241125101144.0 doi 10.1016/j.ijhydene.2023.06.284 sideral 134875 ART-2023-134875 eng Ansón-Casaos, A. (orcid)0000-0002-3134-8566 Modelling TiO2 photoanodes for PEC water splitting: Decoupling the influence of intrinsic material properties and film thickness 2023 Access copy available to the general public Unrestricted Semiconductor metal oxides are intensively studied in electrodes for photoelectrochemical (PEC) water splitting. On a series of nanoparticulate TiO2 photoanodes, we analyze specific fabrication variables by means of data fitting. First, the experimental outcome is gathered using PEC characterization techniques, mostly cyclic voltammetry and transient photocurrent measurements. Subsequently, we apply models to gain insights into the involved charge trapping and transfer phenomena. We find that capacitance coefficients and the switch-on transient kinetics depend on the TiO2 layer thickness, respectively indicating surface mechanisms and stationary regimes that are mediated by light accessibility. On the contrary, exponential factors of capacitance are independent of thickness, but reflect changes in the density of electron states with different sintering atmospheres. Also, the transfer resistance in the electrolyte side is indirectly influenced by sintering. Through meticulous quantitative analysis of trends, we stablish simple mathematical relationships that connect thickness-dependent parameters. This knowledge delves into fundamental mechanisms governing the TiO2 photoelectrode behaviour, and aims to facilitate further improvements in the efficiency of materials and electrodes for green hydrogen production. info:eu-repo/grantAgreement/ES/DGA/E47-23R info:eu-repo/grantAgreement/ES/DGA/T03-23R info:eu-repo/grantAgreement/ES/MICINN-AEI/PID2019-104272RB-C51/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/ 8.1 2023 CHEMISTRY, PHYSICAL 39 / 178 = 0.219 2023 Q1 T1 ENERGY & FUELS 33 / 171 = 0.193 2023 Q1 T1 ELECTROCHEMISTRY 6 / 45 = 0.133 2023 Q1 T1 1.513 2023 Energy Engineering and Power Technology 2023 Q1 Renewable Energy, Sustainability and the Environment 2023 Q1 Fuel Technology 2023 Q1 Condensed Matter Physics 2023 Q1 13.5 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Ciria, J.C. Universidad de Zaragoza (orcid)0000-0002-0048-3036 Martínez Barón, C. Villacampa, B. Universidad de Zaragoza (orcid)0000-0001-9814-0834 Benito, A.M. (orcid)0000-0002-8654-7386 Maser, W.K. 5007 075 Universidad de Zaragoza Dpto. Informát.Ingenie.Sistms. Área Ciencia Comput.Intelig.Ar 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 52, A (2023), 1146-1158 Int. j. hydrogen energy International Journal of Hydrogen Energy 0360-3199 2529329 http://zaguan.unizar.es/record/127769/files/texto_completo.pdf Versión publicada 2354367 http://zaguan.unizar.es/record/127769/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:127769 articulos driver 2024-11-22-12:03:35 ARTICLE