摘要
This work improved the sluggish kinetics in an alkaline medium’s electrochemical hydrogen evolution reaction (HER) by introducing the π-conjugated electronic effect from rationally designed Pt-1,1′-bi(2-naphthol) (BINOL) hybrid nanocomposites. The inorganic-organic hybrid nanocomposites were aqueously synthesized by a facile one-pot approach upon modulation of the surfactant concentration to precisely control the morphology in organic BINOL entities. This protocol led to different geometric nanostructures, including spheres (Pt-BINOL nanospheres) and lamellar flakes (Pt-BINOL nanoflakes), which allowed for fine-tuning of the d-band states of Pt NPs in the hybrid nanocomposites. In the two kinds of Pt-BINOL nanocomposites, the nanoflakes exhibited a low overpotential (24 mV) at the current density of 10 mA·cm-2 and the Tafel slope (19.1 mV dec-1), showing a superior HER efficiency not only much better than the nanospheres and the Pt/C catalyst but also comparable to the HER electrocatalysts in the late literature, with the lowest charge-transfer resistance (Rct) 11.1 Ω and 1.12% of Pt-weight loading revealing that the Pt-BINOL nanoflakes are a cost-efficient electrocatalyst in alkaline HER. In conclusion, engineering the spatial arrangement of Pt NPs over the π-conjugated BINOL nanocarriers to enhance the Pt-catalyzed HER is important in developing efficient inorganic-organic hybrid nanostructures for generating H2 energy.
原文 | English |
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頁(從 - 到) | 11890-11899 |
頁數 | 10 |
期刊 | ACS Applied Nano Materials |
卷 | 7 |
發行號 | 10 |
DOIs | |
出版狀態 | Published - 24 5月 2024 |