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- Title
Y<sub>2</sub>O<sub>3</sub>-functionalized graphene-immobilized Ni–Pt nanoparticles for enhanced hydrous hydrazine and hydrazine borane dehydrogenation.
- Authors
Yao, Qi-Lu; He, Meng; Kong, Ya-Ru; Gui, Tian; Lu, Zhang-Hui
- Abstract
Developing efficient and highly selective catalyst to promote hydrogen generation from hydrous hydrazine (N2H4·H2O) and hydrazine borane (N2H4BH3) remains a challenging issue for fuel cell-based hydrogen economy. In this work, ultrafine and well-dispersed bimetallic NiPt nanoparticles (3.4 nm) were successfully immobilized on Y2O3-functionalized graphene (Y2O3/rGO) without any surfactant by a simple liquid impregnation approach. It is firstly found that integration of graphene and Y2O3 not only can facilitate the formation of ultrafine NiPt nanoparticles (NPs), but also can effectively modulate the electronic structure of NiPt NPs, thereby boosting the catalytic performance. Compared with NiPt/Y2O3 and NiPt/rGO, the NiPt/Y2O3/rGO nanocomposites (NCs) show remarkable enhanced catalytic efficiency for hydrogen production from N2H4·H2O. In particular, the optimized Ni0.6Pt0.4/Y2O3/rGO NCs display the best catalytic efficiency and 100% H2 selectivity for N2H4·H2O dehydrogenation, providing a turnover frequency (TOF) of 2182 h−1 at 323 K, which is among the highest values ever reported. Moreover, the Ni0.6Pt0.4/Y2O3/rGO NCs also exhibit an excellent catalytic performance (TOF = 3191 h−1) and 100% H2 selectively for N2H4BH3 dehydrogenation at 323 K. The outstanding catalytic results obtained provide more possibilities for the potential applications of N2H4·H2O and N2H4BH3 as promising chemical hydrogen storage materials.
- Publication
Rare Metals, 2023, Vol 42, Issue 10, p3410
- ISSN
1001-0521
- Publication type
Article
- DOI
10.1007/s12598-023-02330-z