Pd-Catalyzed Reaction-Producing Intermediate S on a Pd/In2O3 Surface: A Key To Achieve the Enhanced CS2-Sensing Performances

• DOI: 10.1021/acsami.9b01638
• Publication Date: 2019-04-02T09:46:51Z
• Authors: Bo Liu; Yingming Xu; Ke Li; Hong Wang; Lei Gao; Yuanyuan Luo; Guotao Duan
• Keywords: Surface Modification

Although chemiresistive gas sensors, based on metal–oxide semiconductors, have exhibited particular promise for the monitoring of air pollution, they are often limited because poor selectivity. In that case, to overcome this issue, according essence gas-sensing process, method reforming surface reaction path sensing materials was used. Here, we report Pd nanoparticles supported over In2O3 composites, featured with a yolk–shell structure, enable trace detection carbon disulfide (CS2) molecules, which immensely dangerous humans and animals. Moreover, prominent enhancement response ultraselective CS2-sensing characteristic were acquired in comparison pristine sensors. Significantly, density functional theory calculations revealed greatly facilitates adsorption capacity CS2, intermediate S, produced by Pd-catalyzed desulfurization reaction, Pd/In2O3 during process is key achieving high CS2 as well ultraselectivity, agreement X-ray photoelectron spectroscopy analysis results. On basis these results, new mechanism model put forward.