Low temperature Pd/SnO2 sensor for carbon monoxide detection

Selectivity of Catalytically Modified Tin Dioxide to CO and NH3 Gas Mixtures

“…Catalytic additives of noble metals have been established as efficient modifiers, enhancing sensitivity and selectivity to reducing gases, e.g., to CO the efficient modifiers are Pd [10][11][12][13], Au [14,15], Pt [16]; to H2S-CuO [17]; to NH3-RuO2 [18]; to LPG-Pd [19], Au [20]. However, the appropriate choice of a modifier is a non-trivial issue, since in the complex process of gas sensing not only the catalytic activity of clusters, but also their interference with the oxide surface sites, defines the sensor characteristics of modified material [21,22].…”

Synthesis and Characterization of Nanocomposites Tin Oxide-Graphene Doping Pd Using Polyol Method

“…The Pd doping helps to reduce the energy gap of SnO2 [2,8,12,15]. However, SnO2-Pd nanomaterial still shows some drawbacks when applied as gas sensors, such as high working temperature (350 °C) and high resistance (~100 MQ).…”

Amperometric Formaldehyde Sensor Based on a Pd Nanocrystal Modified C/Co2P Electrode

“…In addition, these small packaged sensors can be mass fabricated easily in order to satisfy the large demand in many industrial fields. Generally, there are two types of formaldehyde gas sensor: (1) semiconductors formaldehyde gas sensor based on metal oxide such as SnO 2 [8,9], ZnO [10], In 2 O 3 [11,12], and NiO [13] and (2) amperometric formaldehyde gas sensor made from noble metal nanomaterial, such as platinum or gold [14,15]. In contrast with semiconductor gas sensor, the amperometric formaldehyde gas sensors have numerous advantages such as lower power consumption, excellent linear response, high sensitivity, and reasonable selectivity at room temperature.…”