Stabilized cobalt-based nanofilm catalyst prepared using an ionic liquid/water interfacial process for hydrogen generation from sodium borohydride
2022
Guan, Shuyan | An, Lulu | Su, Hui | Li, Mingbin | Shi, Jianchao | Liu, Xianyun | Fan, Yanping | Li, Baojun | Liu, Baozhong
The design and construction of transition metal catalysts with high performance and low-cost characteristics are imperative for liquid hydrogen storage materials. In this study, we prepared ultrathin carbon-stabilized Co-doped CoₓOy nanofilms (C–Co/CoₓOy NFs) using an ionic liquid/water interface strategy for sodium borohydride (NaBH₄) hydrolysis. Owing to its two-dimensional (2D) NF structure and the protective effects of the composite carbon, the C–Co/CoₓOy NF catalyst exhibited remarkable activity and durability for hydrogen generation from NaBH₄ hydrolysis. The hydrogen generation rate reached 8055 mL·min⁻¹·gCₒ⁻¹ (5106 mL·min⁻¹·gCₐₜ⁻¹) and the catalyst could be recycled more than 20 times, surpassing most reported metal-based catalysts under comparable conditions. In addition, the exceptional 2D Co-based NF structures, with numerous active sites, assisted in the activation of NaBH₄ and water molecules, promoting hydrogen production. Thus, these results provided an in-depth understanding of hydrogen generation from NaBH₄ hydrolysis, and an effective strategy for rationally designing highly active and durable 2D NF catalysts.
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