2023
DOI: 10.3389/fchem.2023.1163503
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Polymer-derived SiOC as support material for Ni-based catalysts: CO2 methanation performance and effect of support modification with La2O3

Abstract: In this study, we investigated Ni supported on polymer-derived ceramics as a new class of catalyst materials. Catalysts have to withstand harsh reaction conditions requiring the use of a support with outstanding thermal and mechanical stability. Polymer-derived ceramics meet these requirements and bring the additional opportunity to realize complex porous structures. Ni-SiOC and La-modified Ni-SiOC catalysts were prepared by wet impregnation methods with target concentrations of 5 wt% for both metal and oxide … Show more

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Cited by 2 publications
(4 citation statements)
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References 35 publications
(99 reference statements)
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“…This transition from hydrophobic to hydrophilic characteristics resulted from a successive loss of residual polymer functionalities, as confirmed by FTIR (Figure a). The observed transition temperature for the transition from being hydrophobic to slightly hydrophilic was between 500 and 700 °C, which is in accordance with the results from a previous study …”
Section: Resultssupporting
confidence: 92%
See 1 more Smart Citation
“…This transition from hydrophobic to hydrophilic characteristics resulted from a successive loss of residual polymer functionalities, as confirmed by FTIR (Figure a). The observed transition temperature for the transition from being hydrophobic to slightly hydrophilic was between 500 and 700 °C, which is in accordance with the results from a previous study …”
Section: Resultssupporting
confidence: 92%
“…The observed transition temperature for the transition from being hydrophobic to slightly hydrophilic was between 500 and 700 °C, which is in accordance with the results from a previous study. 78 …”
Section: Resultsmentioning
confidence: 99%
“…Here, an additional benefit can be anticipated from changes in surface characteristics of SiOC pyrolyzed at lower temperatures, which have been found beneficial for CO 2 methanation. [ 28,71,72 ] In this manner, printed structures could successfully be converted into porous Ni/SiOC monoliths (Figure S14B, Supporting Information).…”
Section: Resultsmentioning
confidence: 99%
“…[ 69 ] The last decisive factor for the applicability of a catalyst is its long‐term stability: here, the monolithic samples generated within this work show improved performance in selectivity during long‐term use compared to SiOC materials decorated with active catalyst centers by conventional impregnation techniques. [ 72 ] The high stability of the in situ formed metal nanoparticles is further highlighted by the limited change in crystallite size, with only a minor increase from 7.6 to 10.8 nm over the 50 h reaction period at 400 °C, indicating the anticipated limitation in sintering phenomena in these environmental conditions.…”
Section: Resultsmentioning
confidence: 99%