Seed-mediated synthesis of dendritic platinum nanostructures with high catalytic activity for aqueous-phase hydrogenation of acetophenone

Yuan, Yuan; Kaneti, Yusuf Valentino; Liu, Minsu; Jin, Fangzhu; Kennedy, Danielle F.; Jiang, Xuchuan; Huang, Jun; Yu, Aibing

doi:10.1016/j.jechem.2015.09.001

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…Platinum is known as the most active metal for hydrogenation reactions. Pt catalysts were successfully applied in liquid‐phase selective hydrogenation of aldehydes and ketones to the corresponding alcohols, even to the unsaturated ones . Nevertheless, to achieve the desired product in a good yield, a high H 2 pressure and temperature are also required, which leads to the necessity in high‐pressure equipment,, (Scheme D, E).…”

Section: Introductionmentioning

confidence: 99%

Selective Room‐Temperature Hydrogenation of Carbonyl Compounds under Atmospheric Pressure over Platinum Nanoparticles Supported on Ceria‐Zirconia Mixed Oxide

et al. 2019

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A Pt/CeO2‐ZrO2 catalytic system was able to initiate an extremely intense hydrogen spillover providing a huge amount of activated hydrogen (12 mol/mol Pt) at temperatures –50°C ‐ +25°C, which was not observed before. The idea was to use this activated hydrogen for reduction of carbonyl compounds under ambient conditions. Thus, the efficient and selective heterogeneous hydrogenation of carbonyl compounds of different structure, including 5‐hydroxymethylfurfural and cinnamaldehyde, to the corresponding alcohols with quantitative yields was successfully performed over the Pt/CeO2‐ZrO2 catalysts at room‐temperature and atmospheric pressure of H2. The proposed catalysts afforded hydrogenation under significantly milder conditions with a much higher activity and selectivity compared to the commercial catalysts and reported catalytic systems. Hydrogenation of the C=O bond in the presence of a C=C bond proceeded with a high regioselectivity.

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Section: Introductionmentioning

confidence: 99%

Selective Room‐Temperature Hydrogenation of Carbonyl Compounds under Atmospheric Pressure over Platinum Nanoparticles Supported on Ceria‐Zirconia Mixed Oxide

et al. 2019

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“…From the X-ray diffraction (XRD) patterns shown in Figure S7, the SLS + H 2 PtCl 6 -0h sample showed the same wide diffraction peak at 2θ = 20–30° as SLS. ,, The face-centered cubic Pt(111), (200), (220), and (311) crystal peaks of SLS + H 2 PtCl 6 -3h, SLS + H 2 PtCl 6 -3h # , and SLS + H 2 PtCl 6 -3h b * samples at 39.9, 46.4, 67.8, and 81.6° confirmed the formation of Pt NPs . Besides, the weaker diffraction peak at 2θ = 20–30° indicated the interaction between the SLS structure and Pt species.…”

Section: Resultsmentioning

confidence: 97%

“…61,63,64 The facecentered cubic Pt(111), ( 200), (220), and (311) crystal peaks of SLS + H 2 PtCl 6 -3h, SLS + H 2 PtCl 6 -3h # , and SLS + H 2 PtCl 6 -3h b * samples at 39.9, 46.4, 67.8, and 81.6°confirmed the formation of Pt NPs. 65 Besides, the weaker diffraction peak at 2θ = 20−30°indicated the interaction between the SLS structure and Pt species. In addition, the observed NaCl crystal Reducing and Stabilizing Action of the Functional Groups in the SLS Frame.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Hydrogenation of α-Pinene over Platinum Nanoparticles Reduced and Stabilized by Sodium Lignosulfonate

et al. 2020

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A one-pot clean preparation procedure and catalytic performance of platinum nanoparticles (NPs) reduced and stabilized by sodium lignosulfonate in aqueous solution are reported. No other chemical reagents are needed during the metal reduction and stabilization step, thanks to the active participation of sodium lignosulfonate (SLS). UV−vis, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), 1 H NMR, 195 Pt NMR, and two-dimensional heteronuclear single-quantum coherence (2D HSQC) NMR studies were thoroughly performed to analyze the formation, particle size, and main lattice planes of NPs, the valencestate changes of the metal, and structural changes of SLS. An ecofriendly selective synthesis of cis-pinane from an abundant renewable natural resource, α-pinene, was developed in the presence of the prepared Pt NP aqueous system. Furthermore, this catalyst system was proved to show easy recovery and stable reusability by five-run tests. The synergistic effect of SLS reduction and stabilization not only avoided the introduction of conventional reducing agents and stabilizers but also made full use of the byproducts of the pulp and paper industry. This proved to be an environmentally friendly method for converting the natural resource α-pinene to cis-pinane.

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“…Size-controlled Pd nano-particles were prepared by modifying a previously reported method. [26][27][28][29][30][31][32] PVP (Mw = 55000, 105 mg) (colloidal stabilizer), L-ascorbic acid (60 mg) (reductant) and KBr (75 mg, 300 mg and 600 mg for Pd particle size of 8 nm, 13 nm and 21 nm, respectively) (capping agent), were all dissolved in deionized water (8 ml) in a 25 ml round-bottom flask at room temperature. The mixture was heated at 80°C for 3 hours under magnetic stirring, resulting in a dark brown solution.…”

Section: Methodsmentioning

confidence: 99%

The Comparative Effect of Particle Size and Support Acidity on Hydrogenation of Aromatic Ketones

et al. 2019

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A comparative study was reported for both the effects of shape-confined cubic Pd particle size (8, 13, and 21 nm) and surface property of most commonly used supports (SiO 2 , Al 2 O 3 , and silica-alumina) on catalytic performance in the chemoselective hydrogenation of three model bio-oil chemicals (benzaldehyde, acetophenone, and butyrophenone). The results showed that the size of Pd particles could be more associated with the hydrogenation reaction than acidities of the supports. Smaller size of Pd particles, regardless of the type of the support, provided the higher catalytic performance. XPS data showed that the electronic properties of Pd particles were similar, therefore, the possible reasons were the higher fraction of Pd atoms on corner in smaller particles, the lower accessibility of hydrogen atom to reactant on bigger particles, and the more low-coordinated sites in the small-size particles due to the short-range ordering. In addition, Pd/SA catalysts (Brønsted acid sites on the support) showed the highest conversion and TOF compared to Pd/Al 2 O 3 and Pd/SiO 2 catalysts. This might be due to the enhanced the diffusion rates of the chemicals on the surface of the catalysts although they could not induce the ionic effect from the metal surface. Pd/ SiO 2 catalysts performed better than Pd/Al 2 O 3 catalysts (Lewis acid sites on the support). The flexible SiOH groups on surface made the easy interaction with the metal particles and promote the reaction.[a] Dr.

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Seed-mediated synthesis of dendritic platinum nanostructures with high catalytic activity for aqueous-phase hydrogenation of acetophenone

Cited by 10 publications

References 32 publications

Selective Room‐Temperature Hydrogenation of Carbonyl Compounds under Atmospheric Pressure over Platinum Nanoparticles Supported on Ceria‐Zirconia Mixed Oxide

Selective Room‐Temperature Hydrogenation of Carbonyl Compounds under Atmospheric Pressure over Platinum Nanoparticles Supported on Ceria‐Zirconia Mixed Oxide

Hydrogenation of α-Pinene over Platinum Nanoparticles Reduced and Stabilized by Sodium Lignosulfonate

The Comparative Effect of Particle Size and Support Acidity on Hydrogenation of Aromatic Ketones

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