Highly Dispersive Palladium Loading on ZnO by Galvanic Replacements with Improved Methane Sensing Performance
Methane detection is important for the safety of production and life. Metal oxide semiconductor (MOS) methane detection is a mature and widely used technology but still experiences problems such as unsatisfying low-temperature sensing performances. In this study, ZnO/Pd with Pd nanoparticles of diff...
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MDPI AG
2022-08-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/8/329 |
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| author | Renjie Chen Shirui Luo Dan Xie Yangxin Yu Lan Xiang |
| author_facet | Renjie Chen Shirui Luo Dan Xie Yangxin Yu Lan Xiang |
| author_sort | Renjie Chen |
| collection | DOAJ |
| description | Methane detection is important for the safety of production and life. Metal oxide semiconductor (MOS) methane detection is a mature and widely used technology but still experiences problems such as unsatisfying low-temperature sensing performances. In this study, ZnO/Pd with Pd nanoparticles of different diameters was prepared to study the influence of Pd dispersion on CH<sub>4</sub> sensing properties. Results showed that CH<sub>4</sub> sensing enhancements were positively correlated with the dispersity of Pd. Moreover, by galvanic replacement using Ag as the sacrificial template, a highly dispersive loading of Pd on ZnO was realized, and the CH<sub>4</sub> sensing performance was further enhanced while the amount of Pd reduced from 1.35 wt% to 0.26 wt%. Experiments and DFT calculation indicated that improved CH<sub>4</sub> sensing performance resulted from abundant catalytic sites induced by highly dispersed Pd NPs and the enhanced CH<sub>4</sub> adsorption on positively charged Pds caused by electrons transferred from Pd to Ag. This study provides a strategy to achieve high dispersion of Pd to maximize the utilization of noble metal, which is promising for lowering the cost of the MOS-based CH<sub>4</sub> sensors. |
| first_indexed | 2024-03-09T04:36:20Z |
| format | Article |
| id | doaj.art-e788cfc1dae545078050fe377f1cbd7e |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-09T04:36:20Z |
| publishDate | 2022-08-01 |
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| spelling | doaj.art-e788cfc1dae545078050fe377f1cbd7e2023-12-03T13:27:50ZengMDPI AGChemosensors2227-90402022-08-0110832910.3390/chemosensors10080329Highly Dispersive Palladium Loading on ZnO by Galvanic Replacements with Improved Methane Sensing PerformanceRenjie Chen0Shirui Luo1Dan Xie2Yangxin Yu3Lan Xiang4Department of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaDepartment of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaSchool of Integrated Circuits, Tsinghua University, Beijing 100084, ChinaLab of Chemical Engineering Thermodynamics, Department of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaDepartment of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaMethane detection is important for the safety of production and life. Metal oxide semiconductor (MOS) methane detection is a mature and widely used technology but still experiences problems such as unsatisfying low-temperature sensing performances. In this study, ZnO/Pd with Pd nanoparticles of different diameters was prepared to study the influence of Pd dispersion on CH<sub>4</sub> sensing properties. Results showed that CH<sub>4</sub> sensing enhancements were positively correlated with the dispersity of Pd. Moreover, by galvanic replacement using Ag as the sacrificial template, a highly dispersive loading of Pd on ZnO was realized, and the CH<sub>4</sub> sensing performance was further enhanced while the amount of Pd reduced from 1.35 wt% to 0.26 wt%. Experiments and DFT calculation indicated that improved CH<sub>4</sub> sensing performance resulted from abundant catalytic sites induced by highly dispersed Pd NPs and the enhanced CH<sub>4</sub> adsorption on positively charged Pds caused by electrons transferred from Pd to Ag. This study provides a strategy to achieve high dispersion of Pd to maximize the utilization of noble metal, which is promising for lowering the cost of the MOS-based CH<sub>4</sub> sensors.https://www.mdpi.com/2227-9040/10/8/329methane sensingZnOPdgalvanic replacementdensity functional theory(DFT) |
| spellingShingle | Renjie Chen Shirui Luo Dan Xie Yangxin Yu Lan Xiang Highly Dispersive Palladium Loading on ZnO by Galvanic Replacements with Improved Methane Sensing Performance Chemosensors methane sensing ZnO Pd galvanic replacement density functional theory(DFT) |
| title | Highly Dispersive Palladium Loading on ZnO by Galvanic Replacements with Improved Methane Sensing Performance |
| title_full | Highly Dispersive Palladium Loading on ZnO by Galvanic Replacements with Improved Methane Sensing Performance |
| title_fullStr | Highly Dispersive Palladium Loading on ZnO by Galvanic Replacements with Improved Methane Sensing Performance |
| title_full_unstemmed | Highly Dispersive Palladium Loading on ZnO by Galvanic Replacements with Improved Methane Sensing Performance |
| title_short | Highly Dispersive Palladium Loading on ZnO by Galvanic Replacements with Improved Methane Sensing Performance |
| title_sort | highly dispersive palladium loading on zno by galvanic replacements with improved methane sensing performance |
| topic | methane sensing ZnO Pd galvanic replacement density functional theory(DFT) |
| url | https://www.mdpi.com/2227-9040/10/8/329 |
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