An efficient bio‐inspired catalytic tool for hydrogen release at room temperature from a stable borohydride solution

Abstract

Commercially available open-cell polyurethane foams (OCPUF) have been successively functionalized with bio-inspired polydopamine coating (OCPUF@PDA), and activated with cobalt nanoparticles (OCPUF@PDA@Co). The resulting soft structured catalytic support (S 2 CS) has been used as a highly efficient tool for the release of dihydrogen from a commercially available alkaline sodium borohydride solution at room temperature. With a diluted solution containing 0.4 wt% NaBH 4 and 0.4 wt% NaOH, the hydrogen generation rate was of 76.4 ± 3.18 LÁh −1 Ág cat −1 after stabilization of the catalytic activity. The catalytic tool could be used for 10 runs.

Pd-functionalized polydopamine-coated polyurethane foam: a readily prepared and highly reusable structured catalyst for selective alkyne semi-hydrogenation and Suzuki coupling under air

“…The conversion and product distribution were calculated from the GC results. NMR spectra were recorded at 298 K on a Bruker Avance III HD 400 MHz spectrometer operating at 400.13 MHz for 1 H and at 100.61 MHz for 13 C. The chemical shifts are referenced to the residual deuterated or 13 C solvent peaks. Chemical shifts (δ) and coupling constants (J) are expressed in ppm and Hz, respectively (see the Supporting Information).…”

“…At this point, an aliquot was removed by syringe to determine the conversion of the aryl bromide by GC analysis, and the solvent was removed under reduced pressure. The crude material was then purified by column chromatography over silica with petroleum ether/ethyl acetate (20:1) as eluent to give the desired product, whose identity was confirmed by 1 H and 13 C NMR in CDCl 3 .…”

“…Inspired by the mussel-like adhesive principle, 7 some of us recently reported the successful coating of PUFs with an adhesive layer of polydopamine (PDA) by simple immersion in a buffered aqueous solution of dopamine, their further functionalization with both inorganic and molecular catalysts, and application in catalysis or dye degradation. [8][9][10][11][12][13][14] The PDA strongly adhesive properties ensured the robust anchoring of the catalysts, leading to high activity and stability over a high number of cycling tests, as well as to the absence of catalyst leaching in the liquid medium. The high versatility of PDA, which can interact with virtually any kind of surfaces and can be easily functionalized is the critical point.…”

Polydopamine film coating on polyurethane foams as efficient “sunscreen”. Application to photocatalysis under UV irradiation

“…In particular, open cell polyurethane foams (OCPUF) are known as remarkable elastomers and are essentially used as filters in cooker hoods, aquariums, mattresses or vacuum cleaners. Based on a polydopamine coating strategy [4], we have shown the great interest of using OCPUF as a soft structured catalytic support (S 2 CS) for various catalytic reactions [5][6][7][8][9][10].…”