Thermal stability study of catalyst (CuO/ZnO) supported on phenyl polyhedral oligomeric silsesquioxanes
The stability of heterogeneous catalytic systems is critical for their long-term. Therefore, the thermal degradation behaviors of CuO/ZnO supported on octaphenyl and dodecaphenyl polyhedral oligomeric silsesquioxane and silsesquioxane were investigated. The presence of the metal oxides does not inte...
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| Veröffentlicht in: | Journal of thermal analysis and calorimetry 2023-10, Vol.148 (19), p.9875-9891 |
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| creator | Rodriguez Herrero, Yanet Ullah, Aman |
| description | The stability of heterogeneous catalytic systems is critical for their long-term. Therefore, the thermal degradation behaviors of CuO/ZnO supported on octaphenyl and dodecaphenyl polyhedral oligomeric silsesquioxane and silsesquioxane were investigated. The presence of the metal oxides does not interfere with the degradation mechanisms up to the temperature of 450 °C. After that temperature, the metal oxides accelerate the degradation rate of the supports. Irreversible thermal events, including molecular relaxation and crystal rearrangement, with low transition energy, were observed using differential scanning calorimetry. In all cases, the thermal analysis revealed complex behaviors. The crystal structure of both supports is destroyed in the oxidative atmosphere at 900 °C but partially destroyed in the nitrogen atmosphere. The vibrational frequencies of the residues in the inert and oxidative atmosphere showed after 500 °C the deformation of the Si–O peak due to intercage linkages formation. |
| doi_str_mv | 10.1007/s10973-023-12367-y |
| format | Article |
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Therefore, the thermal degradation behaviors of CuO/ZnO supported on octaphenyl and dodecaphenyl polyhedral oligomeric silsesquioxane and silsesquioxane were investigated. The presence of the metal oxides does not interfere with the degradation mechanisms up to the temperature of 450 °C. After that temperature, the metal oxides accelerate the degradation rate of the supports. Irreversible thermal events, including molecular relaxation and crystal rearrangement, with low transition energy, were observed using differential scanning calorimetry. In all cases, the thermal analysis revealed complex behaviors. The crystal structure of both supports is destroyed in the oxidative atmosphere at 900 °C but partially destroyed in the nitrogen atmosphere. The vibrational frequencies of the residues in the inert and oxidative atmosphere showed after 500 °C the deformation of the Si–O peak due to intercage linkages formation.</description><identifier>ISSN: 1388-6150</identifier><identifier>EISSN: 1588-2926</identifier><identifier>DOI: 10.1007/s10973-023-12367-y</identifier><language>eng</language><publisher>Cham: Springer International Publishing</publisher><subject>Analysis ; Analytical Chemistry ; Calorimetry ; Chemistry ; Chemistry and Materials Science ; Copper oxides ; Crystal structure ; Crystals ; Inorganic Chemistry ; Measurement Science and Instrumentation ; Metal oxides ; Molecular relaxation ; Physical Chemistry ; Polyhedral oligomeric silsesquioxane ; Polymer Sciences ; Structure ; Thermal analysis ; Thermal degradation ; Thermal stability ; Zinc oxide</subject><ispartof>Journal of thermal analysis and calorimetry, 2023-10, Vol.148 (19), p.9875-9891</ispartof><rights>Akadémiai Kiadó, Budapest, Hungary 2023. 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Therefore, the thermal degradation behaviors of CuO/ZnO supported on octaphenyl and dodecaphenyl polyhedral oligomeric silsesquioxane and silsesquioxane were investigated. The presence of the metal oxides does not interfere with the degradation mechanisms up to the temperature of 450 °C. After that temperature, the metal oxides accelerate the degradation rate of the supports. Irreversible thermal events, including molecular relaxation and crystal rearrangement, with low transition energy, were observed using differential scanning calorimetry. In all cases, the thermal analysis revealed complex behaviors. The crystal structure of both supports is destroyed in the oxidative atmosphere at 900 °C but partially destroyed in the nitrogen atmosphere. The vibrational frequencies of the residues in the inert and oxidative atmosphere showed after 500 °C the deformation of the Si–O peak due to intercage linkages formation.</description><subject>Analysis</subject><subject>Analytical Chemistry</subject><subject>Calorimetry</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Copper oxides</subject><subject>Crystal structure</subject><subject>Crystals</subject><subject>Inorganic Chemistry</subject><subject>Measurement Science and Instrumentation</subject><subject>Metal oxides</subject><subject>Molecular relaxation</subject><subject>Physical Chemistry</subject><subject>Polyhedral oligomeric silsesquioxane</subject><subject>Polymer Sciences</subject><subject>Structure</subject><subject>Thermal analysis</subject><subject>Thermal degradation</subject><subject>Thermal stability</subject><subject>Zinc oxide</subject><issn>1388-6150</issn><issn>1588-2926</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp9kTtrwzAUhUVpoWnaP9BJ0KUdnOhlyxpD6AsCWdKli1AkOVFwLEeyof73VepCt0qDDpf7nXvRAeAeoxlGiM8jRoLTDBGaYUILng0XYILzssyIIMVl0jTpAufoGtzEeEAICYHwBOw2exuOqoaxU1tXu25IqjcD9BXUqlP1EDv4uOzX889m_QRj37Y-dNZA38B2b5uhhq2vh701IZn42u380QanYXR1tPHUO_-lGhtvwVWlUuXu952Cj5fnzfItW61f35eLVaYpEl22tZZpqiouKDWamypnhmrG07qGaHM-QlCsKSNIsXwrcK4xKwlhipVKFXQKHkbfNvhTb2MnD74PTRopSckRJ6xInzQFs7Frp2orXVP5LiidrrFHp31jK5fqC15wiktRnAEyAjr4GIOtZBvcUYVBYiTPCcgxAZnM5U8CckgQHaGYmpudDX-7_EN9A-g6i0Y</recordid><startdate>20231001</startdate><enddate>20231001</enddate><creator>Rodriguez Herrero, Yanet</creator><creator>Ullah, Aman</creator><general>Springer International Publishing</general><general>Springer</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0003-1801-0162</orcidid></search><sort><creationdate>20231001</creationdate><title>Thermal stability study of catalyst (CuO/ZnO) supported on phenyl polyhedral oligomeric silsesquioxanes</title><author>Rodriguez Herrero, Yanet ; Ullah, Aman</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c309t-bee4c3af7933dc7df54d3c47009d2cddddd9931c3420a45b915c148224a48aa63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Analysis</topic><topic>Analytical Chemistry</topic><topic>Calorimetry</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Copper oxides</topic><topic>Crystal structure</topic><topic>Crystals</topic><topic>Inorganic Chemistry</topic><topic>Measurement Science and Instrumentation</topic><topic>Metal oxides</topic><topic>Molecular relaxation</topic><topic>Physical Chemistry</topic><topic>Polyhedral oligomeric silsesquioxane</topic><topic>Polymer Sciences</topic><topic>Structure</topic><topic>Thermal analysis</topic><topic>Thermal degradation</topic><topic>Thermal stability</topic><topic>Zinc oxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rodriguez Herrero, Yanet</creatorcontrib><creatorcontrib>Ullah, Aman</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of thermal analysis and calorimetry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rodriguez Herrero, Yanet</au><au>Ullah, Aman</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermal stability study of catalyst (CuO/ZnO) supported on phenyl polyhedral oligomeric silsesquioxanes</atitle><jtitle>Journal of thermal analysis and calorimetry</jtitle><stitle>J Therm Anal Calorim</stitle><date>2023-10-01</date><risdate>2023</risdate><volume>148</volume><issue>19</issue><spage>9875</spage><epage>9891</epage><pages>9875-9891</pages><issn>1388-6150</issn><eissn>1588-2926</eissn><abstract>The stability of heterogeneous catalytic systems is critical for their long-term. Therefore, the thermal degradation behaviors of CuO/ZnO supported on octaphenyl and dodecaphenyl polyhedral oligomeric silsesquioxane and silsesquioxane were investigated. The presence of the metal oxides does not interfere with the degradation mechanisms up to the temperature of 450 °C. After that temperature, the metal oxides accelerate the degradation rate of the supports. Irreversible thermal events, including molecular relaxation and crystal rearrangement, with low transition energy, were observed using differential scanning calorimetry. In all cases, the thermal analysis revealed complex behaviors. The crystal structure of both supports is destroyed in the oxidative atmosphere at 900 °C but partially destroyed in the nitrogen atmosphere. 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| subjects | Analysis Analytical Chemistry Calorimetry Chemistry Chemistry and Materials Science Copper oxides Crystal structure Crystals Inorganic Chemistry Measurement Science and Instrumentation Metal oxides Molecular relaxation Physical Chemistry Polyhedral oligomeric silsesquioxane Polymer Sciences Structure Thermal analysis Thermal degradation Thermal stability Zinc oxide |
| title | Thermal stability study of catalyst (CuO/ZnO) supported on phenyl polyhedral oligomeric silsesquioxanes |
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