View in EDS

Trace-level methanol detection at room temperature enabled by single-atom Pd stabilized on defective 2D WS2.

Saved in:
Bibliographic Details
Title: Trace-level methanol detection at room temperature enabled by single-atom Pd stabilized on defective 2D WS2.
Authors: Zhang, Haoshuang1 (AUTHOR), Wang, Tianshuang1,2 (AUTHOR) wangtianshuang@jlu.edu.cn, Zhao, Liupeng1 (AUTHOR), Jin, Rui1,3 (AUTHOR) jinrui@jlu.edu.cn, Sun, Peng1,2 (AUTHOR) pengsun@jlu.edu.cn, Lu, Geyu1,2 (AUTHOR)
Source: Journal of Alloys & Compounds. Jan2026, Vol. 1052, pN.PAG-N.PAG. 1p.
Subjects: Methanol, Indoor air quality, Signal detection, Real-time computing, Temperature sensors, Gas detectors
Abstract: Conventional semiconducting gas sensors operating at high temperature (150–400 ℃) are unsuitable for detecting highly flammable methanol (CH 3 OH), thus necessitating room-temperature (RT) operation. However, most reported RT CH 3 OH sensors, hindered by low sensitivity, high detection limit, and poor stability, are impractical for precision gaseous analysis. This study presents a high-performance RT CH 3 OH sensor employing single-atom Pd stabilized onto defective WS 2 nanosheets (Pd SA@WS 2 NSs) as sensing material, overcoming the sensitivity, limit of detection, and stability limitations. Notably, 0.3 wt% Pd SA@WS 2 NSs-based RT sensor exhibited high response (33.7% to 100 ppb CH 3 OH), stable repeatability and low detection limit at 23 ℃, surpassing the reported RT CH 3 OH sensors. The enhanced gas-sensing performance is attributed to the synergistic effect of the highly catalytic activity of atomically dispersed Pd, and the high methanol adsorption at sulfur defects on the WS 2 surface. As a proof-of-concept, we constructed a portable real-time monitoring system using the as-prepared RT sensor, coupled with dynamic threshold alarm functionality that enables immediate indoor air quality assessment and early warning. This work establishes a new paradigm for CH 3 OH leakage monitoring. [Display omitted] • CH 3 OH was detected by single-atom Pd stabilized on defective WS 2 nanosheets at 23 ℃. • 0.3 wt% Pd SA@WS 2 NSs sensor possesses high response (33.7%) to trace CH 3 OH (100 ppb). • S defects and Pd single atom enhance room-temperature CH 3 OH adsorption and catalysis. • A portable CH 3 OH monitoring system enables immediate indoor air quality assessment. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Conventional semiconducting gas sensors operating at high temperature (150–400 ℃) are unsuitable for detecting highly flammable methanol (CH 3 OH), thus necessitating room-temperature (RT) operation. However, most reported RT CH 3 OH sensors, hindered by low sensitivity, high detection limit, and poor stability, are impractical for precision gaseous analysis. This study presents a high-performance RT CH 3 OH sensor employing single-atom Pd stabilized onto defective WS 2 nanosheets (Pd SA@WS 2 NSs) as sensing material, overcoming the sensitivity, limit of detection, and stability limitations. Notably, 0.3 wt% Pd SA@WS 2 NSs-based RT sensor exhibited high response (33.7% to 100 ppb CH 3 OH), stable repeatability and low detection limit at 23 ℃, surpassing the reported RT CH 3 OH sensors. The enhanced gas-sensing performance is attributed to the synergistic effect of the highly catalytic activity of atomically dispersed Pd, and the high methanol adsorption at sulfur defects on the WS 2 surface. As a proof-of-concept, we constructed a portable real-time monitoring system using the as-prepared RT sensor, coupled with dynamic threshold alarm functionality that enables immediate indoor air quality assessment and early warning. This work establishes a new paradigm for CH 3 OH leakage monitoring. [Display omitted] • CH 3 OH was detected by single-atom Pd stabilized on defective WS 2 nanosheets at 23 ℃. • 0.3 wt% Pd SA@WS 2 NSs sensor possesses high response (33.7%) to trace CH 3 OH (100 ppb). • S defects and Pd single atom enhance room-temperature CH 3 OH adsorption and catalysis. • A portable CH 3 OH monitoring system enables immediate indoor air quality assessment. [ABSTRACT FROM AUTHOR]
ISSN:09258388
DOI:10.1016/j.jallcom.2026.186014