Modified Catalysts and Their Fractal Properties
Obtaining high-area catalysts is in demand in heterogeneous catalysis as it influences the ratio between the number of active surface sites and the number of total surface sites of the catalysts. From this point of view, fractal theory seems to be a suitable instrument to characterize catalysts’ sur...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/12/1518 |
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| author | Gianina Dobrescu Florica Papa Razvan State Monica Raciulete Daniela Berger Ioan Balint Niculae I. Ionescu |
| author_facet | Gianina Dobrescu Florica Papa Razvan State Monica Raciulete Daniela Berger Ioan Balint Niculae I. Ionescu |
| author_sort | Gianina Dobrescu |
| collection | DOAJ |
| description | Obtaining high-area catalysts is in demand in heterogeneous catalysis as it influences the ratio between the number of active surface sites and the number of total surface sites of the catalysts. From this point of view, fractal theory seems to be a suitable instrument to characterize catalysts’ surfaces. Moreover, catalysts with higher fractal dimensions will perform better in catalytic reactions. Modifying catalysts to increase their fractal dimension is a constant concern in heterogeneous catalysis. In this paper, scientific results related to oxide catalysts, such as lanthanum cobaltites and ferrites with perovskite structure, and nanoparticle catalysts (such as Pt, Rh, Pt-Cu, etc.) will be reviewed, emphasizing their fractal properties and the influence of their modification on both fractal and catalytic properties. Some of the methods used to compute the fractal dimension of the catalysts (micrograph fractal analysis and the adsorption isotherm method) and the computed fractal dimensions will be presented and discussed. |
| first_indexed | 2024-03-10T04:26:24Z |
| format | Article |
| id | doaj.art-0425d683da9f47148052c7c63d2449be |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T04:26:24Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-0425d683da9f47148052c7c63d2449be2023-11-23T07:34:48ZengMDPI AGCatalysts2073-43442021-12-011112151810.3390/catal11121518Modified Catalysts and Their Fractal PropertiesGianina Dobrescu0Florica Papa1Razvan State2Monica Raciulete3Daniela Berger4Ioan Balint5Niculae I. Ionescu6Surface Chemistry and Catalysis Laboratory, “Ilie Murgulescu” Institute of Physical-Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, RomaniaSurface Chemistry and Catalysis Laboratory, “Ilie Murgulescu” Institute of Physical-Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, RomaniaSurface Chemistry and Catalysis Laboratory, “Ilie Murgulescu” Institute of Physical-Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, RomaniaSurface Chemistry and Catalysis Laboratory, “Ilie Murgulescu” Institute of Physical-Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, RomaniaFaculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Gheorghe Polizu St., 011061 Bucharest, RomaniaSurface Chemistry and Catalysis Laboratory, “Ilie Murgulescu” Institute of Physical-Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, RomaniaSurface Chemistry and Catalysis Laboratory, “Ilie Murgulescu” Institute of Physical-Chemistry of the Romanian Academy, 202 Spl. Independentei, 060021 Bucharest, RomaniaObtaining high-area catalysts is in demand in heterogeneous catalysis as it influences the ratio between the number of active surface sites and the number of total surface sites of the catalysts. From this point of view, fractal theory seems to be a suitable instrument to characterize catalysts’ surfaces. Moreover, catalysts with higher fractal dimensions will perform better in catalytic reactions. Modifying catalysts to increase their fractal dimension is a constant concern in heterogeneous catalysis. In this paper, scientific results related to oxide catalysts, such as lanthanum cobaltites and ferrites with perovskite structure, and nanoparticle catalysts (such as Pt, Rh, Pt-Cu, etc.) will be reviewed, emphasizing their fractal properties and the influence of their modification on both fractal and catalytic properties. Some of the methods used to compute the fractal dimension of the catalysts (micrograph fractal analysis and the adsorption isotherm method) and the computed fractal dimensions will be presented and discussed.https://www.mdpi.com/2073-4344/11/12/1518fractal dimensionmodified catalystsfractal analysisperovskitenanoparticles |
| spellingShingle | Gianina Dobrescu Florica Papa Razvan State Monica Raciulete Daniela Berger Ioan Balint Niculae I. Ionescu Modified Catalysts and Their Fractal Properties Catalysts fractal dimension modified catalysts fractal analysis perovskite nanoparticles |
| title | Modified Catalysts and Their Fractal Properties |
| title_full | Modified Catalysts and Their Fractal Properties |
| title_fullStr | Modified Catalysts and Their Fractal Properties |
| title_full_unstemmed | Modified Catalysts and Their Fractal Properties |
| title_short | Modified Catalysts and Their Fractal Properties |
| title_sort | modified catalysts and their fractal properties |
| topic | fractal dimension modified catalysts fractal analysis perovskite nanoparticles |
| url | https://www.mdpi.com/2073-4344/11/12/1518 |
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