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Platinum Nanoparticles Decorated on NaNbO3 and LiNbO3 as Catalysts for Enhanced Hydrogen Generation via NaBH4 Hydrolysis
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DOI：10.1021/acsomega.6c02694.png)
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Abstract
En 中文
Alkali-metal niobates MNbO3 (M = Na, Li) decorated with platinum (Pt) nanoparticles (NPs) are innovatively utilized as catalytic supports for hydrogen (H2) evolution from sodium borohydride (NaBH4). Notably, a direct comparison between sodium niobate (NaNbO3) and lithium niobate (LiNbO3) in their efficiency for H2 evolution from NaBH4 was conducted for the first time, highlighting the distinct catalytic performance of these materials. The synthesis was confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM). The deposited Pt nanoparticles remain below 10 nm. In this study, different transition-metal nanoparticles (M = Co, Ni, Pd, Pt) supported on NaNbO3 and LiNbO3 were evaluated as catalysts. The Pt NPs/NaNbO3 and Pt NPs/LiNbO3 catalysts demonstrated optimized performance, producing H2 at similar rates of 2044.9 and 2303.7 mL min–1 gcat–1 at 293.15 K. Arrhenius plots indicate activation energies (Ea) of 35.54 ± 1.32 kJ mol–1 for Pt NPs/NaNbO3 and 35.04 ± 1.32 kJ·mol–1 for Pt NPs/LiNbO3. Additionally, the materials exhibited consistent stability, with an efficiency loss of less than 20% after the 10th cycle of use. These results underscore the potential of these catalysts for H2 generation applications.
Keywords:
Catalysts
Hydrogen
Hydrolysis
Metal nanoparticles
Platinum
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4.3
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3.3W
Citations:
9.8W
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