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Comparative studies of doped and surface modified tin oxide towards hydrogen sensing: Synergistic effects of Pd and Ru by V.A Chaudhary; I.S Mulla; K Vijayamohanan is a Engineering article available to read on EtoBox.

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A surface functionalised gas sensing material capable of giving better sensitivity and selectivity to hydrogen is demonstrated by grafting few Ru-O and Pd-O linkages in the surface of tin oxide. A systematic evaluation of the surface coverage, morphology and thermal stability using different techniques like EDAX, Cyclic voltammetry, SEM and TGA indicates the importance of an optimum distribution of Ru/Pd ratio (1.28) in dictating both sensitivity and selectivity. A comparison of the optimum performance of conventionally doped ( 225) and surface modified (1350) tin oxide to 1000 ppm hydrogen at 250°C illustrates the clear advantages offered by surface modified tin oxide in enhancing the sensitivity. Moreover, the synergistic effect by surface functionalisation with both Ru and Pd species is emphasised in comparison to individually modified tin oxide sensors.

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Author

V.A Chaudhary; I.S Mulla; K Vijayamohanan

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0925-4005)

Published

1998

Language

EN

Field

Engineering (Physical Sciences)