A highly selective, efficient hydrogen gas sensor based on bimetallic (Pd–Au) alloy nanoparticle (NP)-decorated SnO2 nanorods

文献情報

出版日 2023-11-17

DOI 10.1039/D3TA05878F

インパクトファクター 12.732

著者

Gaurav Pandey, Shiv Dutta Lawaniya, Sanjay Kumar, Prabhat K. Dwivedi, Kamlendra Awasthi

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要旨

The surging worldwide demand for hydrogen highlights the crucial need for advanced detection technologies, essential for enhancing safety and optimizing utilization across various applications. In this context, we have constructed a highly sensitive hydrogen gas sensor based on SnO2 nanorods decorated with bimetallic (Pd–Au) alloy nanoparticles (NPs) (Pd–Au@SnO2). The material synthesis (Pd–Au@SnO2) was achieved through a hybrid approach involving a hydrothermal treatment and an in situ ascorbic acid reduction process. Various compositions of SnO2 nanorods were prepared by tailoring the bimetallic content of Pd and Au, which was accomplished by adding different volume ratios of their respective precursor solutions. Among the various synthesized combinations, the composition of SnO2 (S1-0.5) with bimetallic decoration (Pd–Au) in a volume ratio of 1 : 0.5 demonstrates superior gas sensing capabilities towards hydrogen (25–500 ppm) within the temperature range 100–200 °C. The S1-0.5 sensor shows a response (Ra/Rg) of 46.4 towards 100 ppm of hydrogen at 175 °C, which is 42.7 fold higher than the bare SnO2 (S0-0) and 2.7 fold higher than Pd decorated SnO2 (S1-0). The excellent gas sensing performance of the S1-0.5 sensor is due to the strong catalytic effect and the synergetic effect of both Pd and Au. The response and recovery times of the S1-0.5 sensor were measured to be 19 s and 302 s, respectively. Furthermore, the S1-0.5 sensor also showed a high selectivity toward gaseous NH3, CO2, CO, and ethanol with a high stability and repeatability.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment