Version 1
: Received: 19 June 2023 / Approved: 19 June 2023 / Online: 19 June 2023 (08:41:17 CEST)
How to cite:
Zhao, J.; Song, J.; Lu, X.; Wu, M.; Yan, Z.; Chen, F.; Chen, W. Room-Temperature Hydrogen Sensitive Pt-SnO2 Composite Nanoceramics: A Comparison Study on Two Different Pt Loading Methods. Preprints2023, 2023061324. https://doi.org/10.20944/preprints202306.1324.v1
Zhao, J.; Song, J.; Lu, X.; Wu, M.; Yan, Z.; Chen, F.; Chen, W. Room-Temperature Hydrogen Sensitive Pt-SnO2 Composite Nanoceramics: A Comparison Study on Two Different Pt Loading Methods. Preprints 2023, 2023061324. https://doi.org/10.20944/preprints202306.1324.v1
Zhao, J.; Song, J.; Lu, X.; Wu, M.; Yan, Z.; Chen, F.; Chen, W. Room-Temperature Hydrogen Sensitive Pt-SnO2 Composite Nanoceramics: A Comparison Study on Two Different Pt Loading Methods. Preprints2023, 2023061324. https://doi.org/10.20944/preprints202306.1324.v1
APA Style
Zhao, J., Song, J., Lu, X., Wu, M., Yan, Z., Chen, F., & Chen, W. (2023). Room-Temperature Hydrogen Sensitive Pt-SnO2 Composite Nanoceramics: A Comparison Study on Two Different Pt Loading Methods. Preprints. https://doi.org/10.20944/preprints202306.1324.v1
Chicago/Turabian Style
Zhao, J., Feng Chen and Wanping Chen. 2023 "Room-Temperature Hydrogen Sensitive Pt-SnO2 Composite Nanoceramics: A Comparison Study on Two Different Pt Loading Methods" Preprints. https://doi.org/10.20944/preprints202306.1324.v1
Abstract
Soluble noble metal salts are widely used for loading noble metals as nano-catalysts in many applications. In this paper, Pt-SnO2 composite nanoceramics were prepared from SnO2 nanoparticles and H2PtCl6 using two Pt-loading methods separately: For the solution reduction method, the H2PtCl6 solution was added to a suspension of SnO2 and zinc powder to form Pt on SnO2 nanoparticles; and for the impregnation method, Pt was formed from H2PtCl6 in the course of sintering. Although a series of samples prepared using both Pt loading methods showed a strong response to H2 at room temperature, the ones prepared using the solution reduction method exhibited much better room temperature hydrogen sensing characteristics. For two samples of 0.5 wt% Pt and sintered at 825°C, the response value for the sample prepared using the solution reduction method was 5300 to 1% H2-20% O2-N2, which was much larger than that of 150 for the sample prepared using the impregnation method. Samples prepared using the two Pt loading methods have similar microstructures as characterized by XRD, FESEM, EDS, TEM, and HRTEM. However, the residual chlorine content in those using the impregnation method was found to be higher than that using the solution reduction method through analysis. It is proposed that the striking difference in the room temperature hydrogen sensing characteristics among samples prepared using these two different Pt loading methods separately resulted from their different chlorine removal process. This study demonstrates the importance of a proper method in loading noble metals from their soluble salts as nano-catalysts in many applications.
Keywords
SnO2; gas sensor; room temperature; Pt-loading; catalyst
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
