Pt Nanoparticles on ZSM-5 Nanoparticles for Base-Free Oxidation of 5-Hydroxymethylfurfural to 2,5-Furandicarboxylic Acid

Abstract

5-Hydroxymethylfurfural (HMF) is considered as a valuable platform chemical derived from abundant sugars in a plant-based biomass. One of the most precious chemicals, which can be derived from HMF, is 2,5-furandicarboxylic acid (FDCA), which is a renewable substituent for petroleum-based terephthalic acid. Herein, the selective oxidation of HMF to FDCA and its derivatives has been accomplished using highly dispersed Pt nanoparticles supported on alkaline-exchanged hierarchical ZSM-5 nanoparticles under mild conditions (110 °C and 2.0 MPa of air) in a base-free aqueous-phase system. Interestingly, a high HMF conversion (100%) with 80% of FDCA selectivity was achieved. The synergetic effect of highly dispersed Pt nanoparticles and an alkaline-exchanged framework plays a key role, wherein they act as active oxidative sites for this multi-oxidation reaction. These findings open up prospects for the development of zeolite-based catalysts for the conversion of HMF to high value-added FDCA and its derivatives in a base-free aqueous system.

Exfoliated Layered Metal Oxide-Supported Ruthenium Catalysts for Base-Free Oxidation of 5-Hydroxymethylfurfural into a Renewable Bioplastic Precursor

“…The conversion remained unchanged after raising the catalyst dosage to 30 and 40 mg (120 wt % and 160 wt % loading, respectively); however, the FDCA yield increased slightly, and no byproducts were observed. Thus far, the previous studies have reported the catalyst loading in the range of 170–380 wt %, to obtain an 80–99% FDCA yield under homogeneous base-free conditions. ,,,− However, some works were done using Pt- and Au-based catalysts at the 60–80 wt % loading, but Pt and Au are at least 3 times more expensive than Ru. ,, …”

Current Advances in the Sustainable Conversion of 5‐Hydroxymethylfurfural into 2,5‐Furandicarboxylic Acid

“…A total conversion of HMF with 80 % of FDCA yield was achieved at 100 °C and 2.0 MPa of air. [55] NaY zeolites were used as support for Ru nanoparticles. The 3 wt% Ru-NaY catalyst demonstrated excellent catalytic performance with complete HMF conversion and 94 % yield of FDCA in 8 h (1 MPa O 2 , 120 °C) and good recyclability (4 cycles).…”

“…For example, highly dispersed Pt nanoparticles were incorporated on alkaline‐exchanged hierarchical ZSM‐5. A total conversion of HMF with 80 % of FDCA yield was achieved at 100 °C and 2.0 MPa of air [55] . NaY zeolites were used as support for Ru nanoparticles.…”

Synergistic Interaction between Ruthenium Catalysts and Grafted Niobium on SBA-15 for 2,5-Furandicarboxylic Acid Production Using 5-Hydroxymethylfurfural

“…Therefore, various strategies for HMF oxidation reactions have been developed to selectively obtain FDCA in high conversion yields for thermal heterogeneous catalysis, , electrocatalysis, , photocatalysis, , microwave heating, and enzyme catalysis . Among these various strategies, the thermally heterogeneous catalysts that utilize molecular oxygen (O 2 ) as an oxidant have garnered significant research interest because of their eco-friendly, cost-effective, and efficient characteristics. − Recently, a number of heterogeneous catalyst systems decorated with nanosized noble metals have been reported for the reaction under base-free conditions. − Wang et al reported that the alloying effect for the Au–Pd/CNT catalysts not only improved the catalytic properties but also changed the reaction pathway in comparison with the Au/CNT catalyst under base-free conditions . Basic supports such as La–CaMgAl–LDH or nNiO have also been used as carriers for the Au–Pd bimetallic catalysts; AuPd/La–CaMgAl–LDH or AuPd/nNiO could catalyze the oxidation of HMF in the absence of alkaline additives .…”