000108277 001__ 108277
000108277 005__ 20230519145343.0
000108277 0247_ $$2doi$$a10.1016/j.electacta.2020.137234
000108277 0248_ $$2sideral$$a121236
000108277 037__ $$aART-2021-121236
000108277 041__ $$aeng
000108277 100__ $$aNellaiappan, S.
000108277 245__ $$aPlatinum substituted Cobalt(II, III) Oxide: Interplay of tetrahedral Co(II) sites towards electrochemical oxygen evolution activity
000108277 260__ $$c2021
000108277 5060_ $$aAccess copy available to the general public$$fUnrestricted
000108277 5203_ $$aSubstitution of ionic platinum is carried out in Co3O4 host synthesized by solution combustion strategy. These Pt substituted Co3O4 spinels characterized by XRD show pure crystalline phase of Co3O4 without any separated peaks related to Pt/PtOx. Electrochemical OER activities of these spinels are investigated by cyclic voltammetry, linear sweep voltammetry and chronoamperometry in neutral, alkaline and neutral buffer electrolytes. LSV studies on 1% Pt substituted Co3O4 exhibit a low overpotential (¿) of 455 mV at 20 mA cm-2 in KOH, as compared to PBS medium. Tafel slope value of 117 mV dec-1 in KOH represents one electron EC mechanism. The detailed XPS studies indicate that Pt doping increases the tetrahedral Co2+ sites of Co3O4. XPS studies before and after OER also infers that the mixed valence of Co in the host (Co3O4) undergoes redox (Co2+/Co3+) changes with simultaneous reduction in Pt dopant from Pt4+ to Pt2+ influencing the OER activity.
000108277 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000108277 590__ $$a7.336$$b2021
000108277 592__ $$a1.306$$b2021
000108277 594__ $$a12.3$$b2021
000108277 591__ $$aELECTROCHEMISTRY$$b7 / 30 = 0.233$$c2021$$dQ1$$eT1
000108277 593__ $$aChemical Engineering (miscellaneous)$$c2021$$dQ1
000108277 593__ $$aElectrochemistry$$c2021$$dQ1
000108277 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000108277 700__ $$aJhariya, N.
000108277 700__ $$0(orcid)0000-0002-2966-9088$$aIrusta, S.$$uUniversidad de Zaragoza
000108277 700__ $$aSinghal, A.
000108277 7102_ $$15005$$2790$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Tecnologi. Medio Ambiente
000108277 773__ $$g365 (2021), 137234 [9 pp]$$pElectrochim. acta$$tElectrochimica Acta$$x0013-4686
000108277 8564_ $$s1193497$$uhttps://zaguan.unizar.es/record/108277/files/texto_completo.pdf$$yPostprint
000108277 8564_ $$s912639$$uhttps://zaguan.unizar.es/record/108277/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000108277 909CO $$ooai:zaguan.unizar.es:108277$$particulos$$pdriver
000108277 951__ $$a2023-05-18-13:17:58
000108277 980__ $$aARTICLE