Metal (Pd, Pt)-decorated carbon nanotubes for CO and NO sensing

Promotion effect of Pt on a SnO2–WO3 material for NO sensing

“…In this study, a 0.5% Pt loading of a 1:2 mixture of SnO 2 -WO 3 exhibited the highest sensor response (3.3) at an NO concentration of 1000 ppm (Table 3). Pt plays a role in NO adsorption [25], providing additional sites for the NO-sensing process (Eq. (3)).…”

“…(3)). The optimal loading of Pt (0.5%) exhibited the highest sensor response, whereas excessive Pt loading may block the adsorption sites for NO sensing [25].…”

Design and Electrochemical Study of Platinum-Based Nanomaterials for Sensitive Detection of Nitric Oxide in Biomedical Applications

“…This was accomplished by controlling the charge transfer between different metals, the local coordination environment, lattice strain, and surface element distribution, particularly toward enhancing their sensitivity and selectivity in contrast to their monometallic analogues, which is often referred to as synergistic effects between the two metals [61,62,63]. The fabrication of metal nanoparticles with graphene enables excellent electrocatalytic properties that lead to high NO sensitivity [23,40,41,64]. Two-dimensional lattice graphene has emerged as a suitable candidate, and attained enormous interest and explosive growth in electrocatalysis and electrochemical sensors.…”

“…Due to the extraordinary electron transport properties and oxygen functionalities of graphene, it helps to support and accelerate electron transfer kinetics during electrochemical processes [65,66,67]. Based on the first-principles calculations, the adsorption of NO and carbon monoxide (CO) gases on palladium (Pd)- and Pt-decorated single walled carbon nanotubes (SWNT) were studied by Cao and co-workers [41]. It has been reported that Pd and Pt might possibly be adsorbed above the top of axial C–C bond centers.…”

“…The use of Pt-based nanocomposites in sensors may serve as one effective strategy toward the augmentation of their electronic, chemical, and electrochemical properties [17,36,37,38,39]. Platinum based nanocomposites such as bimetallic Pt-based alloy nanoparticles, Pt nanoparticles dispersed on various substrates such as metal oxides, carbon nanotubes (CNTs), reduced graphene oxide (rGO), and rGO/ionic liquid (IL) composites, may further enhance the oxidation of NO molecules due to their synergistic electronic effects [23,24,40,41,42,43]. Platinum based nanomaterials as sensing electrode materials may be added to the surfaces of electrodes or modified Pt electrodes through numerous strategies, including physical adsorption, chemical covalent bonding, electrochemical reduction, electrochemical deposition, electrochemical polymerization with redox polymers, etc.…”