Surface Synergetic Effects of Ni–ReO_x for Promoting the Mild Hydrogenation of Furfural to Tetrahydrofurfuryl Alcohol

Abstract

Ni−ReO x bimetallic catalysts (Ni−ReO x /TiO 2 ) were prepared through a successive impregnation method, which is extremely active in furfural (FAL) hydrogenation to tetrahydrofurfuryl alcohol (THFOL) under mild reaction conditions. For instance, high FAL initial reaction rate (439.4 mmol/g -Ni /h) and THFOL formation rate (80.4 mmol/g -Ni /h) were achieved over Ni−5ReO x /TiO 2 , which are 13.2 and 6.6 times higher than those of Ni/TiO 2 , respectively. The unique catalyst reactivity derives from rich Lewis acidic ReO x and intimate electron interaction of ReO x with Ni NPs. Kinetic studies reveal that ReO x decoration decreases the activation barrier of −C�O hydrogenation other than the furan ring. Mechanism studies show that ReO x has a good affinity for C�O and H 2 and favors hydrogen spillover and C�O bond activation on Ni, thus reinforcing the synergistic effect of Ni and ReO x . This catalyst is versatile for various furan aldehydes and is relatively stable for 5 times recycling, showing relative potential for industrial application.

Ru-Loaded Biphasic TiO2 Nanosheet-Tubes Enriched with Ti3+ Defects and Directionally Deficient Electrons as Highly Efficient Catalysts in Benzene Selective Hydrogenation

“…Nitrogen adsorptiondesorption assays were conducted to assess the catalyst samples' surface area and pore size distribution. As Figure 3B demonstrates, all samples show characteristic type IV isotherms and H3 hysteresis loops, indicative of mesoporous structures [33]. Observations indicate a relatively uniform pore size distribution in the samples (Figure 3C), particularly for Ru/TNSTs-4, which demonstrates a complex pore structure combining microporous and mesoporous characteristics.…”

Advancements in the Heterogeneous Catalytic Hydrogenation of Furfural to Downstream Products

“…Lin et al. found that the strong electronic interaction between Ni and ReO x enabled the catalyst to exhibit good hydrogenation activity [80] . As a strong electron donor of Ni, ReO x is conducive to improving the stability of metal Ni on the TiO 2 surface.…”

Regulation of Pt Loading on Co/Al2O3 Catalysts for Selective Hydrogenation and Hydrogenolysis of 5‐Hydroxymethylfurfural to 2,5‐Bis(hydroxymethyl)furan and 2,5‐Dimethylfuran

“…Newly, the thermochemical conversion of platform substances derived from lignocellulosic biomass such as furfural (FAL), 5-hydroxymethylfurfural (HMF), and levulinic acid (LA) though the hydrogenation and hydrogenolysis reactions under pressurized H 2 system have been widely investigated using heterogenous catalysts. [1][2][3][4][5][6][7] Among the platform substances, the HMF derived from cellulose fraction via hydrolysis and dehydration processes could be utilized as a useful feedstock for the production of biofuels and biochemicals based on the modern biorefinery concept. In thermochemical routes under H 2 atmosphere, the valuable multipurpose compounds of 2,5-bis(hydroxymethyl)furan (BHMF) 2,5-dimethyltetrahydrofuran (DMTHF) 5-methylfurfuryl alcohol (MFA), 5-methylfurfural (MF), and 2,5-dimethylfuran (DMF) could be generated from the hydrogenation of C=O bond and hydrogenolysis of CÀ OH bond of HMF using heterogenous non-noble and noble catalysts.…”

“…Newly, the thermochemical conversion of platform substances derived from lignocellulosic biomass such as furfural (FAL), 5‐hydroxymethylfurfural (HMF), and levulinic acid (LA) though the hydrogenation and hydrogenolysis reactions under pressurized H 2 system have been widely investigated using heterogenous catalysts [1–7] . Among the platform substances, the HMF derived from cellulose fraction via hydrolysis and dehydration processes could be utilized as a useful feedstock for the production of biofuels and biochemicals based on the modern biorefinery concept.…”