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Open AccessArticle

Fast Hydrogenation and Dehydrogenation of Pt/Pd Bimetal Decorated over Nano-Structured Ag Islands Grown on Alumina Substrates

School of Electrical Engineering, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, Korea
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Author to whom correspondence should be addressed.
Sensors 2019, 19(1), 86; https://doi.org/10.3390/s19010086
Received: 11 November 2018 / Revised: 15 December 2018 / Accepted: 19 December 2018 / Published: 27 December 2018
(This article belongs to the Special Issue Nanostructured Surfaces in Sensing Systems)
This study reports the fast hydrogenation and dehydrogenation of ultra-thin discrete platinum/palladium (Pt/Pd) bimetal over nano-structured Ag islands grown on rough alumina substrate by a RF magnetron sputtering technique. The morphology of Ag nanoislands was optimized by RF magnetron sputtering and rapid thermal annealing process. Later, Pt/Pd bimetal (10/10) nm were deposited by RF magnetron sputtering on the nanostructured Ag islands. After the surface morphological optimization of Ag nanoislands, the resultant structure Pt/[email protected] nanoislands at alumina substrate showed a fast and enhanced hydrogenation and dehydrogenation (20/25 s), response magnitude of 2.3% (10,000 ppm), and a broad detection range of 500 to 40,000 ppm at the operating temperature of 120 °C. The superior hydrogenation and dehydrogenation features can be attributed to the hydrogen induced changes in the work function of Pt/Pd bimetal which enhances the coulomb scattering of percolated Pt/[email protected] nanoislands. More importantly, the atomic arrangements and synergetic effects of complex metal alloy interfacial structure on Ag nanoislands, supported by rough alumina substrate incorporate the vital role in accelerating the H2 absorption and desorption properties. View Full-Text
Keywords: hydrogenation; dehydrogenation; Ag nano islands; Pt/Pd bimetal hydrogenation; dehydrogenation; Ag nano islands; Pt/Pd bimetal
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MDPI and ACS Style

Rahaman, M.H.; Yaqoob, U.; Kim, H.C. Fast Hydrogenation and Dehydrogenation of Pt/Pd Bimetal Decorated over Nano-Structured Ag Islands Grown on Alumina Substrates. Sensors 2019, 19, 86. https://doi.org/10.3390/s19010086

AMA Style

Rahaman MH, Yaqoob U, Kim HC. Fast Hydrogenation and Dehydrogenation of Pt/Pd Bimetal Decorated over Nano-Structured Ag Islands Grown on Alumina Substrates. Sensors. 2019; 19(1):86. https://doi.org/10.3390/s19010086

Chicago/Turabian Style

Rahaman, Md H.; Yaqoob, Usman; Kim, Hyeon C. 2019. "Fast Hydrogenation and Dehydrogenation of Pt/Pd Bimetal Decorated over Nano-Structured Ag Islands Grown on Alumina Substrates" Sensors 19, no. 1: 86. https://doi.org/10.3390/s19010086

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