Some aspects of Cu incorporation into SrTiO3 structure

Gwóźdź, Paulina; Łącz, Agnieszka; Mizera, Adrian; Drożdż, Ewa

doi:10.1007/s10973-022-11306-7

Cited by 5 publications

(3 citation statements)

References 37 publications

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“…Two less intense signals are observed at around 500 • C and 620 • C; from the work of Gwóźdź et al [54], these peaks could be ascribed to the reduction of Cu ions embedded in the material bulk, thus being more bound to the structure and therefore less reducible.…”

Section: Electronic Propertiesmentioning

confidence: 96%

Section: Bulk Reducibilitymentioning

confidence: 99%

“…Comparing the TPR signal with the XRD pattern, both interpretations are feasible. A two-step partial reduction of shallow copper together with various reduction processes of Cu 2+ species, present in grain boundaries, impurities and in the first layers, can occur, resulting in a reduction temperature shift to higher values with respect to pure CuO [54]. No evident peaks were observed for undoped strontium titanate, while for STCuO, a set of low-temperature peaks, together with two higher temperature peaks, could be assigned to different reduction processes of Cu ions.…”

Section: Functional Properties 221 Bulk Reducibilitymentioning

confidence: 99%

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Cu-Doped SrTiO3 Nanostructured Catalysts for CO2 Conversion into Solar Fuels Using Localised Surface Plasmon Resonance

Rizzato,

Cavazzani,

Osti

et al. 2023

Catalysts

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Carbon dioxide valorisation is one of the most discussed topics amongst researchers; indeed, finding a way to significantly reduce CO2 concentration in the atmosphere is crucial in order to mitigate climate change effects in the next decades. In this study, SrTiO3-supported Cu nanoparticles are exploited as Localised Surface Plasmon Resonance (LSPR)-mediated catalysts for CO2 reduction. The materials were prepared via sol–gel citrate route methodology, inserting Cu as a dopant in the perovskite structure; reducing treatments at different temperatures were performed to promote copper atom exsolution, thus forming nanostructures upon the surface. The perovskitic structure was confirmed via ex situ and operando XRD analysis, while compositional analysis was carried out through XPS and EDS; SEM and TEM images revealed morphological changes with different reducing treatments, and bulk reducibility was analysed with H2-TPR, revealing different Cu species in the material. Band gap analysis via DRS showed the successful incorporation of copper in the perovskite, affecting the light absorption properties. Finally, catalytic tests showed that copper nanoparticles play a role in CO2 activation with sunlight, proving that LSPR could be exploited for catalytic means.

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Section: Electronic Propertiesmentioning

confidence: 96%

Section: Bulk Reducibilitymentioning

confidence: 99%

Section: Functional Properties 221 Bulk Reducibilitymentioning

confidence: 99%

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