@Article{BarrosNuAlFrCoSi:2022:EvAlZr,
               author = "Barros, Jo{\~a}o Lucas Marques and Nunes, Matheus M. and Alves, 
                         Odivaldo C. and Franchini, Carlos A. and Corat, Evaldo Jos{\'e} 
                         and Silva, Adriana Maria da",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal 
                         Fluminense (UFF)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Evaluation of Al2O3 and ZrO2 addition to reduced graphene oxide 
                         (rGO) supports and their interplay with Cu sites in the catalyst 
                         surface",
              journal = "Inorganic Chemistry Communications",
                 year = "2022",
               volume = "142",
                pages = "109591",
                 note = "{Setores de Atividade: Pesquisa e desenvolvimento 
                         cient{\'{\i}}fico.}",
             keywords = "Grafeno, Aerogel, cat{\'a}lise, Metanol.",
             abstract = "In this contribution it is reported the synthesis of Cu-based 
                         catalysts supported on reduced graphene oxide (rGO) and its 
                         hybrids (Al-rGO and Zr-rGO), aiming at the tailoring of the 
                         surface properties for application in the CO2 hydrogenation. With 
                         the purpose of gaining more insight about the preparation method 
                         and nature of the rGO promoter (Al2O3, ZrO2) the catalysts were 
                         prepared by the hydrothermal and wetness impregnation methods. The 
                         hydrothermal catalyst Cu@Zr-rGO led to highest methanol space time 
                         yield (STY), envisaging an interaction between ZrO2 and GO 
                         (graphene oxide) during synthesis, promoting the formation of ZrO2 
                         nanostructures and allowing the stabilization of Cu species at the 
                         nanoscale. X-Ray diffraction indicated distinct interactions of Cu 
                         and the catalysts components, with Cu0 and Cu2+ predominantly 
                         present in the hydrothermal catalysts whereas Cu1+ was only 
                         detected in the impregnated samples. Furthermore, Cu/Zr-rGO also 
                         exhibited feature corresponding to Cu2+, denoting a significant 
                         role of the promoter over the Cu species distribution. Raman 
                         spectroscopy indicated highly defective structures for all the 
                         samples, with Zr promoted catalysts appearing with the richest in 
                         defects, possibly due to the presence of oxygen vacancies. Thus, 
                         there is a fine interplay among rGO, promoter and synthesis route 
                         over the Cu oxidation and particle size and, thus, over the 
                         catalytic properties.",
                  doi = "10.1016/j.inoche.2022.109591",
                  url = "http://dx.doi.org/10.1016/j.inoche.2022.109591",
                 issn = "1387-7003",
                label = "lattes: 0560039556461253 5 MarquesBarrosNuAlFrCoSi:2022:EvAlZr",
             language = "en",
           targetfile = "1-s2.0-S1387700322003999-main.pdf",
        urlaccessdate = "29 jun. 2024"
}