[논문]Confined interfacial alloying of multilayered Pd-Ni nanocatalyst for widening hydrogen detection capacity

Lee, Young-Ahn; Duy, Le Thai; Han, Seungik; An, Hyesung; Park, Jucheol; Singh, Ranveer; Kim, Hyun You; Seo, Hyungtak

doi:10.1016/j.snb.2020.129378

[해외논문] Confined interfacial alloying of multilayered Pd-Ni nanocatalyst for widening hydrogen detection capacity 원문보기

Sensors and actuators. B, Chemical, v.330, 2021년, pp.129378 -

Lee, Young-Ahn (Department of Energy Systems Research, Ajou University) , Duy, Le Thai (Department of Materials Science and Engineering, Ajou University) , Han, Seungik (Department of Energy Systems Research, Ajou University) , An, Hyesung (Department of Materials Science and Engineering, Chungnam National University) , Park, Jucheol (Gyeongbuk Science Technology Promotion Center, Gumi Electronics and Information Technology Research Institute) , Singh, Ranveer (Department of Materials Science and Engineering, Ajou University) , Kim, Hyun You (Department of Materials Science and Engineering, Chungnam National University) , Seo, Hyungtak (Department of Energy Systems Research, Ajou University)

Abstract ▼ AI-Helper

Abstract Nanostructuring of catalysts, such as Pd, is of interest for exploiting their unique surface properties cost-effectively for various applications, especially high-dose hydrogen sensing and storage. Although various Pd modifications have been reported, they have a drawback of structural instability in applications involving high hydrogen doses. Thus, our development of a multilayered Pd-Ni nanocatalyst (PN, three Pd and two Ni layers) is proposed. Here we show the confined self-alloying of Pd and Ni at their interfaces, forming ultrathin 2D-like PdNi x layers that facilitate ultrafast hydrogen detection over a wide range (20 ppm to 100 %, workable at 25–100°C) with extraordinary reversibility (> 30,000 cycles, tested at 100°C). That phenomenon of our 11-nm-thick nanocatalyst is justified through experimental measurements and simulation. Thereby, the obtained results revealed the high potency of our PN with the confined self-alloying for high-dose and wide-range hydrogen sensing applications and showed a new way to construct better catalytic nanosystems at low cost. Highlights Our 11-nm-thick Pd-Ni catalyst could detect hydrogen from 20 ppm to 100 %. That came from the Pd lattice stabilization by interfacial localized Ni dopants. The more physical insight into the observed phenomena was provided. Our findings showed the potential of nanocatalysts based on superlattice-like hybrids. Graphical abstract [DISPLAY OMISSION]

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