Quantitative analysis of the synergistic effect of Au nanoparticles on SnO2–rGO nanocomposites for room temperature hydrogen sensing. Issue 3 (18th January 2021)

• Record Type: Journal Article
• Authors: Wang, Yale; Pu, Haihui; Lu, Ganhua; Sui, Xiaoyu; Chen, Junhong
• Is Part Of: Physical chemistry chemical physics. Volume 23:Issue 3(2020)
• Page Start: 2377
• Page End: 2383
• Publication Date: 2021-01-18
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d0cp05701k
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : The accelerating effect of gold additives on hydrogen sensing was quantitatively studied through Arrhenius analysis. Abstract : 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.