A selective CO sensor using Ti-doped α-Fe2O3 with coprecipitated ultrafine particles of gold

Kobayashi, Tetsuhiko; Haruta, Masatake; Sano, Hiroshi; Nakane, Masanori

doi:10.1016/0250-6874(88)80047-7

Cited by 124 publications

(40 citation statements)

References 17 publications

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“…Since then, there have been numerous studies on other oxide semiconductors such as SnO 2 , ZnO, In 2 O 3 , TiO 2 , α-Fe 2 O 3 , HfO 2 , WO 3 , BaSnO 3 (Seiyama et al 1962;Yamazoe et al 1983;Kabayashi et al 1988;Tamaki et al 1990;Lampe et al 1995;Nakamura et al 1998;Tao and Tsai 2002;Cantalini 2004). Semiconductor oxide gas sensors are extensively studied in order to improve their sensing characteristics, i.e.…”

Section: Introductionmentioning

confidence: 96%

Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

Jain¹,

Patil²,

Patil

et al. 2007

Bull Mater Sci

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Barium strontium titanate ((Ba 0⋅87 Sr 0⋅13 )TiO 3 -BST) ceramic powder was prepared by mechanochemical process. The thick films of different thicknesses of BST were prepared by screen-printing technique and gas-sensing performance of these films was tested for various gases. The films showed highest response and selectivity to ammonia gas. The effect of film thickness on gas response was also studied. As prepared BST thick films were surface modified by dipping them into an aqueous solution of titanium chloride (TiCl 3 ) for different intervals of time. Surface modification shifted response to H 2 S gas suppressing the responses to ammonia and other gases. The surface modification, using dipping process, altered the adsorbate-adsorbent interactions, which gave the unusual sensitivity and selectivity effect. Sensitivity, selectivity, thermal stability, response and recovery time of the sensor were measured and presented.

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Section: Introductionmentioning

confidence: 96%

Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

Jain¹,

Patil²,

Patil

et al. 2007

Bull Mater Sci

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show abstract

“…Our work mainly focuses on IrO 2 and RuO 2 [17], Au [18], Pt [21,22] and Pt-based alloy particles. The choice of these materials was motivated by their numerous and useful potential application in electrocatalysis: oxygen reduction (IrO 2 , RuO 2 , Au), CO oxidation (Au) [29,30], and alcohol (methanol or ethanol) electrooxidation (Pt and Pt-based particles) [31][32][33]. A large range of synthesis methods has been explored.…”

Section: Introductionmentioning

confidence: 99%

Deposition of clusters and nanoparticles onto boron-doped diamond electrodes for electrocatalysis

et al. 2006

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Metal and metal oxide particles and nanoparticles, differing from each other by their nature and synthesis technique, were deposited onto boron-doped diamond (BDD) thin film electrodes. The applicability in electrocatalysis of thermally decomposed IrO 2 and Au nanoparticles, electrodeposited Pt particles, dendrimer-encapsulated Pt nanoparticles (Pt DENs) and microemulsion-synthesized Pt/Ru nanoparticles was studied, once deposited on BDD substrate. In all cases, the electrochemical response of the composite electrodes could be solely attributed to the supported particles. All the particles, with the exception of Pt DENs, exhibited electrocatalytic activity. Pt DENs inactivity has been attributed to insufficient removal of the dendrimer polymer matrix. It was concluded that the BDD electrode is a suitable substrate for the electrochemical investigation of supported catalytic nanoparticles.

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“…Gold catalysis has received considerable attention since the discovery that nano-sized gold particles are catalytically active [1][2][3][4][5][6][7][8]. The catalytic activity of small gold particles is interesting, since low-index gold surfaces are known to be noble [9][10][11] and inactive towards most molecules.…”

Section: Introductionmentioning

confidence: 99%

Insights into the reactivity of supported Au nanoparticles: combining theory and experiments

et al. 2007

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The origin of the extraordinary catalytic activity of gold nanoparticles is discussed on the basis of density-functional calculations, adsorption studies on single crystal surfaces, and activity measurements on well characterized supported gold particles. A number of factors are identified contributing to the activity, and it is suggested that it is useful to consider lowcoordinated Au atoms as the active sites, for example, CO oxidation and that the effect of the support can be viewed as structural and electronic promotion. We identify the adsorption energy of oxygen and the Au-support interface energy as important parameters determining the catalytic activity.

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A selective CO sensor using Ti-doped α-Fe2O3 with coprecipitated ultrafine particles of gold

Cited by 124 publications

References 17 publications

Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

Deposition of clusters and nanoparticles onto boron-doped diamond electrodes for electrocatalysis

Insights into the reactivity of supported Au nanoparticles: combining theory and experiments

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