Highly sensitive and fast-response hydrogen sensing of WO3 nanoparticles via palladium reined spillover effect

Zhengyou Zhu; Xiaxia Xing; Dongliang Feng; Zhenxu Li; Yingying Tian; Dachi Yang

doi:10.1039/d1nr02870g

Highly sensitive and fast-response hydrogen sensing of WO₃ nanoparticles via palladium reined spillover effect

Nanoscale. 2021 Aug 7;13(29):12669-12675. doi: 10.1039/d1nr02870g. Epub 2021 Jul 19.

Authors

Zhengyou Zhu¹, Xiaxia Xing, Dongliang Feng, Zhenxu Li, Yingying Tian, Dachi Yang

Affiliation

¹ Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology and Department of Electronics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China. yangdachi@nankai.edu.cn.

PMID: 34477617
DOI: 10.1039/d1nr02870g

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.