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oai:riubu.ubu.es:10259/103032025-03-12T01:05:31Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Palenzuela, Jesús Viñuales, Ana Odriozola, Ibon Cabañero, Germán Grande, Hans J. Ruiz Fernández, Virginia 2025-03-11T07:54:59Z 2025-03-11T07:54:59Z 2014-08 1944-8244 http://hdl.handle.net/10259/10303 10.1021/am503869b 1944-8252 Reduced graphene oxide (RGO) films have been electrodeposited on indium tin oxide-coated polyethylene terephthalate (ITO-PET) substrates from graphene oxide (GO) solutions, and the resulting flexible transparent electrodes have been used in electrochromic devices of ethyl viologen (EtV2+). The electrochromic performance of devices with bare ITO-PET electrodes and ITO-PET coated with RGO has been compared. Under continuous cycling tests up to large voltages, the RGO film was oxidized and dispersed in the electrochromic mixture. The resulting devices, which contained GO and RGO in the electrochromic mixture, showed lower switching voltages between the colored and bleached states. This electrocatalytic activity of the solution-phase GO/RGO pair toward the electrochemical reaction of the electrochromic redox couple (the dication EtV2+ and the radical cation EtV+•) allowed devices with an optical contrast higher than the contrast of those free of GO at the same applied voltage. Financial support from the Spanish MICINN (V .R. Ramón y Cajal Program) and the Basque Government (Etortek Program, nanoIKER Project IE11-304) is gratefully acknowledged. application/pdf eng American Chemical Society ACS Applied Materials & Interfaces. 2014, V. 6, n. 16, p. 14562-14567 https://doi.org/10.1021/am503869b Electrochromism Flexible electrodes Graphene oxide Viologen Electroquímica Electrotecnia Electrochemistry Electrical engineering Flexible Viologen Electrochromic Devices with Low Operational Voltages Using Reduced Graphene Oxide Electrodes info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion info:eu-repo/semantics/openAccess ACS Applied Materials & Interfaces 6 16 14562 14567