PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>: Highly Active Catalysts with Good Moisture- and Sulfur Dioxide-Resistant Performance in Toluene Oxidation
Catalytic performance and moisture and sulfur dioxide resistance are important for a catalyst used for the oxidation of volatile organic compounds (VOCs). Supported noble metals are active for VOC oxidation, but they are easily deactivated by water and sulfur dioxide. Hence, it is highly desired to...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Catalysts |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4344/12/11/1302 |
| _version_ | 1797468803016163328 |
|---|---|
| author | Jingjing Sun Yuxi Liu Jiguang Deng Lin Jing Minming Bao Qinpei Sun Linlin Li Linke Wu Xiuqing Hao Hongxing Dai |
| author_facet | Jingjing Sun Yuxi Liu Jiguang Deng Lin Jing Minming Bao Qinpei Sun Linlin Li Linke Wu Xiuqing Hao Hongxing Dai |
| author_sort | Jingjing Sun |
| collection | DOAJ |
| description | Catalytic performance and moisture and sulfur dioxide resistance are important for a catalyst used for the oxidation of volatile organic compounds (VOCs). Supported noble metals are active for VOC oxidation, but they are easily deactivated by water and sulfur dioxide. Hence, it is highly desired to develop a catalyst with high performance and good moisture and sulfur dioxide resistance in the oxidation of VOCs. In this work, we first adopted the hydrothermal method to synthesize a V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> composite support, and then employed the polyvinyl alcohol (PVA)-protecting NaBH<sub>4</sub> reduction strategy to fabricate <i>x</i>PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> catalysts (<i>x</i> and <i>y</i> are the PdPt<i><sub>y</sub></i> loading (0.41, 0.46, and 0.49 wt%) and Pt/Pd molar ratio (2.10, 0.85, and 0.44), respectively; the corresponding catalysts are denoted as 0.46PdPt<sub>2.10</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>, 0.41PdPt<sub>0.85</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>, and 0.49PdPt<sub>0.44</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>). Among all the samples, 0.46PdPt<sub>2.10</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> exhibited the best catalytic activity for toluene oxidation (<i>T</i><sub>50%</sub> = 220 °C and <i>T</i><sub>90%</sub> = 245 °C at a space velocity of 40,000 mL/(g h), apparent activation energy (<i>E</i><sub>a</sub>) = 45 kJ/mol), specific reaction rate at 230 °C = 98.6 μmol/(g<sub>Pt</sub> s), and turnover frequency (TOF<sub>Noble</sub> <sub>metal</sub>) at 230 °C = 142.2 × 10<sup>−</sup><sup>3</sup> s<sup>−</sup><sup>1</sup>. The good catalytic performance of 0.46PdPt<sub>2.10</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> was associated with its well-dispersed PdPt<sub>2.10</sub> nanoparticles, high adsorbed oxygen species concentration, good redox ability, large toluene adsorption capacity, and strong interaction between PdPt<i><sub>y</sub></i> and V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>. No significant changes in toluene conversion were detected when 5.0 vol% H<sub>2</sub>O or 50 ppm SO<sub>2</sub> was introduced to the reaction system. According to the characterization results, we can realize that vanadium is the main site for SO<sub>2</sub> adsorption while PdO is the secondary site for SO<sub>2</sub> adsorption, which protects the active Pt site from being poisoned by SO<sub>2</sub>, thus making the 0.46PdPt<sub>2.10</sub>/V<sub>2</sub>O<sub>5</sub>TiO<sub>2</sub> catalyst show good sulfur dioxide resistance. |
| first_indexed | 2024-03-09T19:12:32Z |
| format | Article |
| id | doaj.art-c1af3511329d43bbb99c0a1a4fbb5799 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T19:12:32Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-c1af3511329d43bbb99c0a1a4fbb57992023-11-24T04:05:07ZengMDPI AGCatalysts2073-43442022-10-011211130210.3390/catal12111302PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>: Highly Active Catalysts with Good Moisture- and Sulfur Dioxide-Resistant Performance in Toluene OxidationJingjing Sun0Yuxi Liu1Jiguang Deng2Lin Jing3Minming Bao4Qinpei Sun5Linlin Li6Linke Wu7Xiuqing Hao8Hongxing Dai9Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaBeijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, ChinaCatalytic performance and moisture and sulfur dioxide resistance are important for a catalyst used for the oxidation of volatile organic compounds (VOCs). Supported noble metals are active for VOC oxidation, but they are easily deactivated by water and sulfur dioxide. Hence, it is highly desired to develop a catalyst with high performance and good moisture and sulfur dioxide resistance in the oxidation of VOCs. In this work, we first adopted the hydrothermal method to synthesize a V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> composite support, and then employed the polyvinyl alcohol (PVA)-protecting NaBH<sub>4</sub> reduction strategy to fabricate <i>x</i>PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> catalysts (<i>x</i> and <i>y</i> are the PdPt<i><sub>y</sub></i> loading (0.41, 0.46, and 0.49 wt%) and Pt/Pd molar ratio (2.10, 0.85, and 0.44), respectively; the corresponding catalysts are denoted as 0.46PdPt<sub>2.10</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>, 0.41PdPt<sub>0.85</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>, and 0.49PdPt<sub>0.44</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>). Among all the samples, 0.46PdPt<sub>2.10</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> exhibited the best catalytic activity for toluene oxidation (<i>T</i><sub>50%</sub> = 220 °C and <i>T</i><sub>90%</sub> = 245 °C at a space velocity of 40,000 mL/(g h), apparent activation energy (<i>E</i><sub>a</sub>) = 45 kJ/mol), specific reaction rate at 230 °C = 98.6 μmol/(g<sub>Pt</sub> s), and turnover frequency (TOF<sub>Noble</sub> <sub>metal</sub>) at 230 °C = 142.2 × 10<sup>−</sup><sup>3</sup> s<sup>−</sup><sup>1</sup>. The good catalytic performance of 0.46PdPt<sub>2.10</sub>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub> was associated with its well-dispersed PdPt<sub>2.10</sub> nanoparticles, high adsorbed oxygen species concentration, good redox ability, large toluene adsorption capacity, and strong interaction between PdPt<i><sub>y</sub></i> and V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>. No significant changes in toluene conversion were detected when 5.0 vol% H<sub>2</sub>O or 50 ppm SO<sub>2</sub> was introduced to the reaction system. According to the characterization results, we can realize that vanadium is the main site for SO<sub>2</sub> adsorption while PdO is the secondary site for SO<sub>2</sub> adsorption, which protects the active Pt site from being poisoned by SO<sub>2</sub>, thus making the 0.46PdPt<sub>2.10</sub>/V<sub>2</sub>O<sub>5</sub>TiO<sub>2</sub> catalyst show good sulfur dioxide resistance.https://www.mdpi.com/2073-4344/12/11/1302palladium–platinum bimetallic nanoparticlevanadia–titania composite supportsupported noble metal catalysttoluene oxidationmoisture resistancesulfur dioxide resistance |
| spellingShingle | Jingjing Sun Yuxi Liu Jiguang Deng Lin Jing Minming Bao Qinpei Sun Linlin Li Linke Wu Xiuqing Hao Hongxing Dai PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>: Highly Active Catalysts with Good Moisture- and Sulfur Dioxide-Resistant Performance in Toluene Oxidation Catalysts palladium–platinum bimetallic nanoparticle vanadia–titania composite support supported noble metal catalyst toluene oxidation moisture resistance sulfur dioxide resistance |
| title | PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>: Highly Active Catalysts with Good Moisture- and Sulfur Dioxide-Resistant Performance in Toluene Oxidation |
| title_full | PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>: Highly Active Catalysts with Good Moisture- and Sulfur Dioxide-Resistant Performance in Toluene Oxidation |
| title_fullStr | PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>: Highly Active Catalysts with Good Moisture- and Sulfur Dioxide-Resistant Performance in Toluene Oxidation |
| title_full_unstemmed | PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>: Highly Active Catalysts with Good Moisture- and Sulfur Dioxide-Resistant Performance in Toluene Oxidation |
| title_short | PdPt<i><sub>y</sub></i>/V<sub>2</sub>O<sub>5</sub>-TiO<sub>2</sub>: Highly Active Catalysts with Good Moisture- and Sulfur Dioxide-Resistant Performance in Toluene Oxidation |
| title_sort | pdpt i sub y sub i v sub 2 sub o sub 5 sub tio sub 2 sub highly active catalysts with good moisture and sulfur dioxide resistant performance in toluene oxidation |
| topic | palladium–platinum bimetallic nanoparticle vanadia–titania composite support supported noble metal catalyst toluene oxidation moisture resistance sulfur dioxide resistance |
| url | https://www.mdpi.com/2073-4344/12/11/1302 |
| work_keys_str_mv | AT jingjingsun pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT yuxiliu pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT jiguangdeng pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT linjing pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT minmingbao pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT qinpeisun pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT linlinli pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT linkewu pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT xiuqinghao pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation AT hongxingdai pdptisubysubivsub2subosub5subtiosub2subhighlyactivecatalystswithgoodmoistureandsulfurdioxideresistantperformanceintolueneoxidation |