Plant-Mediated Synthesis of Ag–Pd Alloy Nanoparticles and Their Application as Catalyst toward Selective Hydrogenation

Abstract

Herein, we reported the green synthesis of Ag–Pd alloy nanoparticles (NPs) using the aqueous extract of the Cacumen platycladi leaves as well as their application as catalyst for hydrogenation of 1,3-butadiene. The biosynthetic NPs were characterized to confirm the nature of alloy by UV–vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDX). The possible functional groups responsible for the reduction and protection of NPs were identified through Fourier transform infrared spectroscopy (FTIR). The results revealed that biomolecules like saccharides, polyphenols, or carbonyl compounds were related to the reduction process, and the (NH)­CO groups were responsible for the stabilization of the NPs. Furthermore, the as-formed Ag–Pd bimetallic-supported catalysts especially Ag1Pd3/γ-Al2O3 was found to possess excellent catalytic performance toward hydrogenation of 1,3-butadiene. A butene yield of 84.9% was obtained, which was remarkably enhanced when compared with monometallic counterparts. Moreover, the activity of it maintained stability within 12 h of durable experiments.

Bio-inspired synthesis of metal nanomaterials and applications

“…184 The synthesized Au meatball-like NPs possess excellent monodispersity and uniform size (250 nm in diameter). 190 B10 nm AuAg alloy NPs could also be prepared using a similar method. The first example was reported by Huang et al, 185 who described the continuousflow biosynthesis of Ag NPs using Cinnamomum camphora (C. camphora) leaf extract.…”

“…187 The model and its applicability in predicting formation and particle size distribution of Ag NPs in the continuous-flow tubular system were subsequently validated. Lu et al 190 reported a facile and green synthesis of AgPd alloy bimetallic NPs using C. Platycladi extract. 188 Besides monometallic NPs, bimetallic NPs could also be simply synthesized by plant-mediated synthesis.…”

“…The best performance was achieved with a short-circuit current of 11.8 mA cm À2 corresponding to a photoelectric conversion efficiency of 5.12%, higher than the glucose-Ag-TiO 2 and UV-Ag-TiO 2 DSSCs. 190 4.2 Sensing 4.2.1 Electrochemical sensors. 323 Very recently, it was reported that a bio-Au-SrTiO 3 composite (with Au NPs of 8.8 AE 3.2 nm, 3 wt%Au) was prepared by syzygium extract and used for H 2 evolution from formaldehyde aqueous solution without any additives at low temperature.…”

Flacourtia indica based biogenic nanoparticles: development, characterization, and bioactivity against wound associated pathogens

“…The methods impending nanoparticles (NPs) like a chemical, photo-reduction, and thermal decomposition have been limited due to non-eco-friendly and expensive pathways [1][2][3]. Due to increasing hazards using toxic chemicals, capping agents, oxidizing and reducing agents in the synthesis of NPs, researchers have proposed new engineering strategies using the combination of natural resources and nano-biotechnology [4,5].…”

Plant‐Mediated Biogenic Synthesis of Palladium Nanoparticles: Recent Trends and Emerging Opportunities

“…Furthermore, the lignin-stabilized PdNPs were successfully used as catalysts in the reduction of 4-nitrophenol to 4-aminophenol and the oxida-tion of cyclohexanol [46]. The bimetallic nanoparticles of Ag/Pd supported on g-Al 2 O 3 created with the help of an aqueous extract of Cacumen platycladi leaves demonstrated excellent catalytic effect towards the selective hydrogenation of 1,3-butadiene [169]. Au/Pd bimetallic nanoparticles with flower-like morphology prepared using Cacumen platycladi leaf extract exhibited excellent surface-enhanced Raman spectroscopic (SERS) activity with rhodamine 6G (R6G).…”