期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 23, 期 3, 页码 2377-2383出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cp05701k
关键词
-
资金
- National Science Foundation [IIP-1701203]
Hydrogen detection devices using Au-SnO2/rGO nanohybrids showed notable sensitivity, even at concentrations as low as 0.04% hydrogen. The acceleration effect of gold dopants resulted in faster response and recovery during hydrogen sensing, as revealed by activation energy analysis. Integration of the sensor chip with a portable digital meter demonstrated a hydrogen detection handheld device for direct readout of test results.
Hydrogen detection devices based on gold-tin oxide/reduced graphene oxide (Au-SnO2/rGO) nanohybrids were fabricated by combining a hydrothermal method with sputter coating. The gas sensing performance of the Au-SnO2/rGO sensor was investigated under different concentrations of hydrogen from 0.04% to 1% at room temperature, which indicated a notable sensitive response even for 0.04% hydrogen. The activation energies of hydrogen adsorption/desorption were extracted via Arrhenius analysis which revealed the acceleration effect of gold dopants. This acceleration led to a faster response and recovery during hydrogen sensing. The activation energy analysis provided a more comprehensive understanding on the gas sensing mechanism. A hydrogen detection handheld device is demonstrated by integrating the sensor chip with a portable digital meter for direct readout of test results.
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