Highly sensitive and fast-response hydrogen sensing of WO3 nanoparticles via palladium reined spillover effect. Issue 29 (19th July 2021)

• Record Type: Journal Article
• Authors: Zhu, Zhengyou; Xing, Xiaxia; Feng, Dongliang; Li, Zhenxu; Tian, Yingying; Yang, Dachi
• Is Part Of: Nanoscale. Volume 13:Issue 29(2021)
• Page Start: 12669
• Page End: 12675
• Publication Date: 2021-07-19
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d1nr02870g
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Hydrogen sensor prototypes built from Pd-NPs@WO3 -NPs simultaneously present fast response, highly selective and sensitive detection of hydrogen in real-time monitoring hydrogen leakage. Abstract : Hydrogen sensing simultaneously endowed with fast response, high sensitivity and selectivity is highly desired in detecting hydrogen leakages such as in hydrogen-driven vehicles and space rockets. Here, hydrogen sensing reined via a hydrogen spillover effect has been developed using palladium nanoparticles photochemically decorated on WO3 nanoparticles (Pd-NPs@WO3 -NPs). Theoretically, the Pd-NP catalysts and WO3 -NP support are used to construct the hydrogen spillover system, in which Pd NPs possess high catalytic activity, promoting the electron transfer and therefore the reaction kinetics. Beneficially, the Pd-NPs@WO3 -NP sensor prototypes toward 500 ppm hydrogen simultaneously exhibit fast response time (∼1.2 s), high response ( R a / R g = 22 867) and selectivity at a working temperature of 50 °C. Such advanced hydrogen sensing provides an experimental basis for the smart detection of hydrogen leakage in the future hydrogen economy.