Polyol-Mediated Synthesis of V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts for Low-Temperature Selective Catalytic Reduction with Ammonia
We demonstrated highly efficient selective catalytic reduction catalysts by adopting the polyol process, and the prepared catalysts exhibited a high nitrogen oxide (NO<sub>X</sub>) removal efficiency of 96% at 250 °C. The V<sub>2</sub>O<sub>5</sub> and WO<sub&g...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/12/20/3644 |
| _version_ | 1797470682799407104 |
|---|---|
| author | Min Seong Lee Yeong Jun Choi Su-Jeong Bak Mingyu Son Jeehoon Shin Duck Hyun Lee |
| author_facet | Min Seong Lee Yeong Jun Choi Su-Jeong Bak Mingyu Son Jeehoon Shin Duck Hyun Lee |
| author_sort | Min Seong Lee |
| collection | DOAJ |
| description | We demonstrated highly efficient selective catalytic reduction catalysts by adopting the polyol process, and the prepared catalysts exhibited a high nitrogen oxide (NO<sub>X</sub>) removal efficiency of 96% at 250 °C. The V<sub>2</sub>O<sub>5</sub> and WO<sub>3</sub> catalyst nanoparticles prepared using the polyol process were smaller (~10 nm) than those prepared using the impregnation method (~20 nm), and the small catalyst size enabled an increase in surface area and catalytic acid sites. The NO<sub>X</sub> removal efficiencies at temperatures between 200 and 250 °C were enhanced by approximately 30% compared to those of the catalysts prepared using the conventional impregnation method. The NH<sub>3</sub>-temperature-programmed desorption and H<sub>2</sub>-temperature-programmed reduction results confirmed that the polyol process produced more surface acid sites at low temperatures and enhanced the redox ability. The in situ Fourier-transform infrared spectra further elucidated the fast absorption of NH<sub>3</sub> and its reduction with NO and O<sub>2</sub> on the prepared catalyst surfaces. This study provides an effective approach to synthesizing efficient low-temperature SCR catalysts and may contribute to further studies related to other catalytic systems. |
| first_indexed | 2024-03-09T19:40:31Z |
| format | Article |
| id | doaj.art-733536870b7a45be95c9651b428c507b |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T19:40:31Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-733536870b7a45be95c9651b428c507b2023-11-24T01:40:57ZengMDPI AGNanomaterials2079-49912022-10-011220364410.3390/nano12203644Polyol-Mediated Synthesis of V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts for Low-Temperature Selective Catalytic Reduction with AmmoniaMin Seong Lee0Yeong Jun Choi1Su-Jeong Bak2Mingyu Son3Jeehoon Shin4Duck Hyun Lee5Green Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaGreen Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaGreen Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaGreen Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaGreen Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaGreen Materials and Processes R&D Group, Korea Institute of Industrial Technology, Ulsan 44413, KoreaWe demonstrated highly efficient selective catalytic reduction catalysts by adopting the polyol process, and the prepared catalysts exhibited a high nitrogen oxide (NO<sub>X</sub>) removal efficiency of 96% at 250 °C. The V<sub>2</sub>O<sub>5</sub> and WO<sub>3</sub> catalyst nanoparticles prepared using the polyol process were smaller (~10 nm) than those prepared using the impregnation method (~20 nm), and the small catalyst size enabled an increase in surface area and catalytic acid sites. The NO<sub>X</sub> removal efficiencies at temperatures between 200 and 250 °C were enhanced by approximately 30% compared to those of the catalysts prepared using the conventional impregnation method. The NH<sub>3</sub>-temperature-programmed desorption and H<sub>2</sub>-temperature-programmed reduction results confirmed that the polyol process produced more surface acid sites at low temperatures and enhanced the redox ability. The in situ Fourier-transform infrared spectra further elucidated the fast absorption of NH<sub>3</sub> and its reduction with NO and O<sub>2</sub> on the prepared catalyst surfaces. This study provides an effective approach to synthesizing efficient low-temperature SCR catalysts and may contribute to further studies related to other catalytic systems.https://www.mdpi.com/2079-4991/12/20/3644polyol-mediated synthesisNH<sub>3</sub>-selective catalytic reductionsmall catalysts |
| spellingShingle | Min Seong Lee Yeong Jun Choi Su-Jeong Bak Mingyu Son Jeehoon Shin Duck Hyun Lee Polyol-Mediated Synthesis of V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts for Low-Temperature Selective Catalytic Reduction with Ammonia Nanomaterials polyol-mediated synthesis NH<sub>3</sub>-selective catalytic reduction small catalysts |
| title | Polyol-Mediated Synthesis of V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts for Low-Temperature Selective Catalytic Reduction with Ammonia |
| title_full | Polyol-Mediated Synthesis of V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts for Low-Temperature Selective Catalytic Reduction with Ammonia |
| title_fullStr | Polyol-Mediated Synthesis of V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts for Low-Temperature Selective Catalytic Reduction with Ammonia |
| title_full_unstemmed | Polyol-Mediated Synthesis of V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts for Low-Temperature Selective Catalytic Reduction with Ammonia |
| title_short | Polyol-Mediated Synthesis of V<sub>2</sub>O<sub>5</sub>–WO<sub>3</sub>/TiO<sub>2</sub> Catalysts for Low-Temperature Selective Catalytic Reduction with Ammonia |
| title_sort | polyol mediated synthesis of v sub 2 sub o sub 5 sub wo sub 3 sub tio sub 2 sub catalysts for low temperature selective catalytic reduction with ammonia |
| topic | polyol-mediated synthesis NH<sub>3</sub>-selective catalytic reduction small catalysts |
| url | https://www.mdpi.com/2079-4991/12/20/3644 |
| work_keys_str_mv | AT minseonglee polyolmediatedsynthesisofvsub2subosub5subwosub3subtiosub2subcatalystsforlowtemperatureselectivecatalyticreductionwithammonia AT yeongjunchoi polyolmediatedsynthesisofvsub2subosub5subwosub3subtiosub2subcatalystsforlowtemperatureselectivecatalyticreductionwithammonia AT sujeongbak polyolmediatedsynthesisofvsub2subosub5subwosub3subtiosub2subcatalystsforlowtemperatureselectivecatalyticreductionwithammonia AT mingyuson polyolmediatedsynthesisofvsub2subosub5subwosub3subtiosub2subcatalystsforlowtemperatureselectivecatalyticreductionwithammonia AT jeehoonshin polyolmediatedsynthesisofvsub2subosub5subwosub3subtiosub2subcatalystsforlowtemperatureselectivecatalyticreductionwithammonia AT duckhyunlee polyolmediatedsynthesisofvsub2subosub5subwosub3subtiosub2subcatalystsforlowtemperatureselectivecatalyticreductionwithammonia |