{"title":"Pd-Doped WO3 Nanoplates for Hydrogen Sensing: Experimental Studies and Density Functional Theory Investigations","authors":"Shiteng Ma, Fengjiao Chen, Yukun Liu, Hao Zhang, Peilin Jia and Dongzhi Zhang*, ","doi":"10.1021/acsanm.4c02114","DOIUrl":null,"url":null,"abstract":"<p >In this article, a hydrogen sensor with excellent performance was synthesized using the hydrothermal method, with Pd-modified WO<sub>3</sub> nanoplates as the sensing layer. At an optimum operating temperature of 200 °C, the hydrogen gas sensing capabilities of WO<sub>3</sub> and Pd-WO<sub>3</sub> composite sensors were investigated. The findings indicate that in contrast to the WO<sub>3</sub> sensor, the Pd-WO<sub>3</sub> composite sensor exhibits superior hydrogen sensing performance, showcasing remarkable selectivity, reliable repeatability, sustained long-term stability, and quick response and recovery (8 s/10 s@100 ppm). The first-principles density functional theory was used to explain the sensing mechanism of the Pd-WO<sub>3</sub> composite. The improved sensing performance of Pd-WO<sub>3</sub> composite sensors was explained from the perspectives of the Schottky junction formed between Pd nanoparticles and WO<sub>3</sub>, the catalytic effect of metal Pd nanoparticles, and gas adsorption–desorption. This article confirms that Pd-modified WO<sub>3</sub> nanoplates are good candidates for efficient hydrogen gas sensing.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Nano Materials","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsanm.4c02114","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In this article, a hydrogen sensor with excellent performance was synthesized using the hydrothermal method, with Pd-modified WO3 nanoplates as the sensing layer. At an optimum operating temperature of 200 °C, the hydrogen gas sensing capabilities of WO3 and Pd-WO3 composite sensors were investigated. The findings indicate that in contrast to the WO3 sensor, the Pd-WO3 composite sensor exhibits superior hydrogen sensing performance, showcasing remarkable selectivity, reliable repeatability, sustained long-term stability, and quick response and recovery (8 s/10 s@100 ppm). The first-principles density functional theory was used to explain the sensing mechanism of the Pd-WO3 composite. The improved sensing performance of Pd-WO3 composite sensors was explained from the perspectives of the Schottky junction formed between Pd nanoparticles and WO3, the catalytic effect of metal Pd nanoparticles, and gas adsorption–desorption. This article confirms that Pd-modified WO3 nanoplates are good candidates for efficient hydrogen gas sensing.
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.