1. Hydrogen sensing and mechanism of M-doped SnO2 (M=Cr3+, Cu2+ and Pd2+) nanocomposite
- Author
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Zeng, Wen, Liu, Tianmo, Liu, DeJun, and Han, ErJing
- Subjects
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HYDROGEN , *STANNIC oxide , *NANOCOMPOSITE materials , *CHROMIUM ions , *COPPER ions , *MICROSTRUCTURE , *PALLADIUM , *GAS detectors - Abstract
Abstract: The microstructure of M-doped SnO2 (M=Cr3+, Cu2+ and Pd2+) prepared by the sol–gel method and their gas-sensing performance were investigated. In particular, we focus on the effects of metallic ions on the hydrogen sensing behavior of the SnO2-based sensor. It is found that hydrogen gas response of SnO2 can be enhanced evidently by adding Pd2+, while such effect from Cr3+ and Cu2+ exhibits somewhat slight. A theoretical study based on first principles calculation shows that SnO2–Pd (110) surface enable adsorb more H2 gas and receive larger electrons from adsorbed H2 molecule, thereby holding the potential for the improvement of gas response to hydrogen. [Copyright &y& Elsevier]
- Published
- 2011
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