000132785 001__ 132785
000132785 005__ 20250923084411.0
000132785 0247_ $$2doi$$a10.1016/j.apsusc.2024.159556
000132785 0248_ $$2sideral$$a137706
000132785 037__ $$aART-2024-137706
000132785 041__ $$aeng
000132785 100__ $$aGonzález-Ingelmo, M.
000132785 245__ $$aOn the study of the preparation of graphene-anchored NHC-iridium catalysts from a coke-like waste with application in water splitting
000132785 260__ $$c2024
000132785 5060_ $$aAccess copy available to the general public$$fUnrestricted
000132785 5203_ $$aGraphene oxide has been prepared from an industrial coke-like waste. The morphology of this material (GO-CW) is similar to that of standard graphene oxide (GO-G), although its surface has more defects. Both materials were used to prepare hybrid NHC-Ir(I)/graphene materials, consisting of molecular Ir(NHC) complexes covalently anchored to the graphene surface through the NHC moiety, following two different synthetic routes: (a) direct graphene electrografting of the previously synthesized aniline-functionalized imidazole-2-ylidene-Ir(I) complex, and (b) a two-step sequence comprising initial electrografting of aniline-imidazolium salts and subsequent chemical reaction with Ir(I) precursor anchoring imidazole-2-ylidene-Ir(I) molecular complexes. The synthesized NHC-Ir/graphene hybrid catalysts are active in the oxygen evolution reaction (OER) resulting in current densities in a similar range to those of other NHC-iridium(I) catalysts supported on GO. The highest activity corresponds to hybrid catalysts prepared by the two-step route, with even higher activity and stability when graphene oxide from industrial waste is used. EXAFS spectra of the materials prepared from both synthesis routes before oxidation catalysis reveal the local Ir coordination shell and a structural interaction between Ir and graphene. Both XANES and EXAFS spectra after electrocatalysis point to more oxidized species in which the molecular nature of the iridium catalysts is preserved.
000132785 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E42-23R$$9info:eu-repo/grantAgreement/ES/DGA-FSE/E12-23R-RASMIA$$9info:eu-repo/grantAgreement/ES/MICINN-FEDER/PID2019-103965GB-I00$$9info:eu-repo/grantAgreement/ES/MICINN/PID2019-104028RB-I00$$9info:eu-repo/grantAgreement/ES/MICINN/PID2022-137208NB-I00
000132785 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000132785 590__ $$a6.9$$b2024
000132785 592__ $$a1.31$$b2024
000132785 591__ $$aMATERIALS SCIENCE, COATINGS & FILMS$$b3 / 23 = 0.13$$c2024$$dQ1$$eT1
000132785 593__ $$aChemistry (miscellaneous)$$c2024$$dQ1
000132785 591__ $$aPHYSICS, CONDENSED MATTER$$b16 / 79 = 0.203$$c2024$$dQ1$$eT1
000132785 593__ $$aCondensed Matter Physics$$c2024$$dQ1
000132785 591__ $$aPHYSICS, APPLIED$$b33 / 187 = 0.176$$c2024$$dQ1$$eT1
000132785 593__ $$aSurfaces, Coatings and Films$$c2024$$dQ1
000132785 591__ $$aCHEMISTRY, PHYSICAL$$b47 / 185 = 0.254$$c2024$$dQ2$$eT1
000132785 593__ $$aSurfaces and Interfaces$$c2024$$dQ1
000132785 593__ $$aPhysics and Astronomy (miscellaneous)$$c2024$$dQ1
000132785 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000132785 700__ $$aÁlvarez, P.
000132785 700__ $$aGranda, M.
000132785 700__ $$aRocha, V.G.
000132785 700__ $$aGonzález, Z.
000132785 700__ $$aSierra, U.
000132785 700__ $$0(orcid)0000-0001-6675-7450$$aSánchez-Page, B.
000132785 700__ $$0(orcid)0000-0002-0545-9107$$aJiménez, M.V.
000132785 700__ $$0(orcid)0000-0002-3327-0918$$aPérez Torrente, J.J.$$uUniversidad de Zaragoza
000132785 700__ $$aBlasco, J.
000132785 700__ $$aSubias, G.
000132785 7102_ $$12010$$2760$$aUniversidad de Zaragoza$$bDpto. Química Inorgánica$$cÁrea Química Inorgánica
000132785 773__ $$g655 (2024), 159556 [13 pp.]$$pAppl. surf. sci.$$tApplied Surface Science$$x0169-4332
000132785 8564_ $$s8007689$$uhttps://zaguan.unizar.es/record/132785/files/texto_completo.pdf$$yVersión publicada
000132785 8564_ $$s2631164$$uhttps://zaguan.unizar.es/record/132785/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000132785 909CO $$ooai:zaguan.unizar.es:132785$$particulos$$pdriver
000132785 951__ $$a2025-09-22-14:30:14
000132785 980__ $$aARTICLE