Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation
Zirconia (ZrO2) nanoparticles were synthesized by solution combustion using urea as an organic fuel. Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), UV–vis and Fourier transform infrared (FTIR) measurements were perfo...
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2017-01-01
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| Series: | Beilstein Journal of Nanotechnology |
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| Online Access: | https://doi.org/10.3762/bjnano.8.29 |
| _version_ | 1818445885462282240 |
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| author | Amit Singhania Shipra Mital Gupta |
| author_facet | Amit Singhania Shipra Mital Gupta |
| author_sort | Amit Singhania |
| collection | DOAJ |
| description | Zirconia (ZrO2) nanoparticles were synthesized by solution combustion using urea as an organic fuel. Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), UV–vis and Fourier transform infrared (FTIR) measurements were performed in order to characterize the catalyst. The calculated crystallite size of ZrO2, calculated with the help of the Scherrer equation, was around 30.3 nm. The synthesized ZrO2 was scrutinized regarding its role as catalyst in the oxidation of carbon monoxide (CO). It showed 100% CO conversion at 240 °C, which is the highest conversion rate reported for ZrO2 in literature to date. It is found that through solution combustion, Pt2+ ions replace Zr4+ ions in the ZrO2 lattice and because of this, oxygen vacancies are formed due to charge imbalance and lattice distortion in ZrO2. 1% Pt was doped into ZrO2 and yielded excellent CO oxidation. The working temperature was lowered by 150 °C in comparison to pure ZrO2. Further, it is highly stable for the CO reaction (time-on-stream ≈ 40 h). This is because of a synergic effect between Pt and Zr components, which results in an increase of the oxygen mobility and oxygen vacancies and improves the activity and stability of the catalyst. The effects of gas hourly space velocity (GHSV) and initial CO concentration on the CO oxidation over Pt(1%)-ZrO2 were studied. |
| first_indexed | 2024-12-14T19:38:56Z |
| format | Article |
| id | doaj.art-e9c53a060a3d49e5af4f0f030c10df2f |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-12-14T19:38:56Z |
| publishDate | 2017-01-01 |
| publisher | Beilstein-Institut |
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| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-e9c53a060a3d49e5af4f0f030c10df2f2022-12-21T22:49:45ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862017-01-018126427110.3762/bjnano.8.292190-4286-8-29Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidationAmit Singhania0Shipra Mital Gupta1Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, IndiaUniversity School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, Sector 16-C, Dwarka, New Delhi 110078, IndiaZirconia (ZrO2) nanoparticles were synthesized by solution combustion using urea as an organic fuel. Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), transmission electron microscopy (TEM), UV–vis and Fourier transform infrared (FTIR) measurements were performed in order to characterize the catalyst. The calculated crystallite size of ZrO2, calculated with the help of the Scherrer equation, was around 30.3 nm. The synthesized ZrO2 was scrutinized regarding its role as catalyst in the oxidation of carbon monoxide (CO). It showed 100% CO conversion at 240 °C, which is the highest conversion rate reported for ZrO2 in literature to date. It is found that through solution combustion, Pt2+ ions replace Zr4+ ions in the ZrO2 lattice and because of this, oxygen vacancies are formed due to charge imbalance and lattice distortion in ZrO2. 1% Pt was doped into ZrO2 and yielded excellent CO oxidation. The working temperature was lowered by 150 °C in comparison to pure ZrO2. Further, it is highly stable for the CO reaction (time-on-stream ≈ 40 h). This is because of a synergic effect between Pt and Zr components, which results in an increase of the oxygen mobility and oxygen vacancies and improves the activity and stability of the catalyst. The effects of gas hourly space velocity (GHSV) and initial CO concentration on the CO oxidation over Pt(1%)-ZrO2 were studied.https://doi.org/10.3762/bjnano.8.29CO oxidationnanomaterialsplatinumsolution combustion methodzirconia |
| spellingShingle | Amit Singhania Shipra Mital Gupta Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation Beilstein Journal of Nanotechnology CO oxidation nanomaterials platinum solution combustion method zirconia |
| title | Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation |
| title_full | Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation |
| title_fullStr | Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation |
| title_full_unstemmed | Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation |
| title_short | Nanocrystalline ZrO2 and Pt-doped ZrO2 catalysts for low-temperature CO oxidation |
| title_sort | nanocrystalline zro2 and pt doped zro2 catalysts for low temperature co oxidation |
| topic | CO oxidation nanomaterials platinum solution combustion method zirconia |
| url | https://doi.org/10.3762/bjnano.8.29 |
| work_keys_str_mv | AT amitsinghania nanocrystallinezro2andptdopedzro2catalystsforlowtemperaturecooxidation AT shipramitalgupta nanocrystallinezro2andptdopedzro2catalystsforlowtemperaturecooxidation |