Cellulosic biomass is the largest source of renewable organic carbon on our planet. Cellulose accounts for 40–50 wt % this lignocellulose, and it a feedstock industrially important chemicals fuels. The first step in cellulose conversion involves its depolymerization to glucose or hydrogenated product sorbitol. hydrolysis by homogeneous mineral acids was subject research almost century. However, have significant drawbacks are neither economical nor environmentally friendly. In 2006, group...

Controlling the selectivity of products among CO, methane, and methanol is a challenge in CO2 hydrogenation. Catalysts with oxygen vacancies are helpful for activation, but they exhibit poor CO as intermediates stabilized over undergo deep hydrogenation to methane. Here, we report synthesis catalyst isolated Co atoms ZrO2 that exhibits vacant sites near owing charge imbalance between cations. The resulting catalytic site effectively adsorbs also achieves more than 95% during was independent...

The development of an efficient photocatalyst for C2 product formation from CO2 is urgent importance toward the deployment solar-fuel production. Here, we report a template-free, cost-effective synthetic strategy to develop carbazole-derived porous organic polymer (POP)-based composite catalyst. catalyst comprised In2.77S4 and (POP) held together by induced-polarity-driven electrostatic interaction. Utilizing synergy catalytically active In centers light-harvesting POPs, showed 98.9%...

Water soluble oligomers of cellulose were produced by milling acidulated microcrystalline cellulose. Acids with low pKa found to be more effective for the treatment. The yield water fraction was proportional increasing severity or acid amount. Soluble have an average degree polymerisation ∼7 monomer units. High resolution NMR spectroscopy used determine chemical structures oligomers. It that branched α (1 → 6) linkages formed, which increased their solubility in and reduced generation...

A carbon catalyst prepared by air oxidation of woody biomass hydrolyses biomass, and the reaction residue is transformed back to same method.

Abstract A water–THF biphasic system containing N ‐methyl‐2‐pyrrolidone (NMP) was found to enable the efficient synthesis of 5‐hydroxymethylfurfural (HMF) from a variety sugars (simple complex) using phosphated TiO 2 as catalyst. Fructose and glucose were selectively converted HMF resulting in 98 % 90 yield, respectively, at 175 °C. Cellobiose sucrose also gave rise high yields 94 %, 180 Other sugar variants such starch (potato rice) cellulose investigated. The (80–85 %) high, whereas...

Biphasic dehydration of cellulosic biomass into remarkable yield HMF can be achieved <italic>via</italic> mechanocatalysis and fractionation treatment.

Atomically dispersed Rh promoted the activity of In₂O₃ for methanol formation from CO₂, inducing strong CO₂ adsorption and enhanced formate formation.

Selective production of succinic acid from furfural with H2O2 over Sn-Beta, a pure Lewis catalyst, is reported. Under optimized reaction conditions, 53% yield was obtained, and the catalyst recyclable. 2(3H)-Furanone detected as an intermediate using 1H nuclear magnetic resonance (NMR), HH correlation NMR spectroscopy, liquid chromatography–mass spectrometry (MS) gas chromatography–MS. Kinetic modeling revealed that Baeyer–Villiger oxidation to 2(3H)-furanone accelerated in comparison other...

During the hydrogenation of CO2 to methanol over mixed-oxide catalysts, strong adsorption and formate poses a barrier for H2 dissociation, limiting selectivity productivity. Here we show that by using Co-containing dual-atom oxide poisoning effect can be countered separating site dissociation intermediates. We synthesized Co- In-doped ZrO2 catalyst (Co–In–ZrO2) containing atomically dispersed Co In species. Catalyst characterization showed atoms were in proximity each other owing random...

Harvesting solar energy to produce value-added chemicals from carbon dioxide (CO2) presents a promising route for addressing the complexities of sustainable systems and environmental issues. In this context, development metal-coordinated porous organic polymers (POPs) offers vital avenue improving photocatalytic performance motifs. The current study metal-integrated system (namely, Zn@BP-POP) developed via one-pot Friedel–Crafts (F.C.) acylation strategy, solid–gas phase photochemical CO2...

Abstract Nanosized phosphated TiO 2 catalysts with different phosphate contents were synthesized and tested for the conversion of glucose to 5‐hydroxymethylfurfural. The resulting materials characterized by using N ‐adsorption, XRD, inductively coupled plasma atomic emission spectroscopy, X‐ray TEM, temperature‐programmed desorption ammonia, FTIR spectroscopy pyridine adsorption techniques determine their structural, bulk, surface, acid properties. We found that nanoparticles catalyzed this...

Sorbitol is one of the key platform chemicals that can be applied to several industrial applications, including bio-fuels and hydrogen production. Presently there no commercial heterogeneous catalytic process produce sorbitol from cellulose due low yield high cost noble metals required for conversion. In this paper we describe an aqueous phase hydrolysis–hydrogenation convert using a cheap Ni based catalyst. Monometallic catalysts showed little activity reaction, but with addition small...

In this study, graphene nanosheet-supported ultrafine Cu nanoparticles (NPs) encapsulated with thin mesoporous silica (Cu-GO@m-SiO2) materials are fabricated particle sizes ranging from 60 to 7.8 nm and systematically investigated for the oxidative coupling of amines produce biologically pharmaceutically important imine derivatives. Catalytic activity remarkably increased 76.5% conversion benzyl amine NPs 99.3% exclusive selectivity N-benzylidene-1-phenylmethanamine NPs. The superior...

Oxygenated carbon catalyzes the hydrolysis of cellulose present in lignocellulosic biomass by utilizing weakly acidic functional groups on its surface. Here we report synthesis a biomimetic catalyst simple and economical air-oxidation commercially available activated carbon. Air- oxidation at 450-500 °C introduced 2000-2400 μmol g(-1) oxygenated material with minor changes textural properties. Selectivity towards formation carboxylic surface increased increase temperature. The degree was...

Partial oxidation of methane (POM) is a potential technology to increase the efficiency synthesizing mixture CO and H2 called syngas, in comparison steam reforming processes. Recently, supported metals modified with Re have emerged as active catalysts for POM. However, role this reaction has been unclear. Here, we demonstrate that addition Ru/Al2O3 catalyst changes mechanism. The bimetallic oxidizes CH4 mainly via formate. After all O2 used, reverse water-gas shift take place yield H2. This...

Sustainable production of acetic acid is a high priority due to its global manufacturing capacity and numerous applications. Currently, it predominantly synthesized via carbonylation methanol, in which both the reactants are fossil-derived. Carbon dioxide transformation into highly desirable achieve net zero carbon emissions, but significant challenges remain this efficiently. Herein, we report heterogeneous catalyst, thermally transformed MIL-88B with Fe0 Fe3O4 dual active sites, for...

Industrial chemicals with a four-carbon structure, including maleic acid, 1,4-butanediol, γ-butyrolactone, and pyrrolidones, are derived from petroleum. Catalytic synthesis of these C4 biomass is challenging because the scarcity sugars in feedstock. We show that 5-hydroxy-2(5H)-furanone (5H5F), produced by catalytic oxidation biomass-derived furfural, versatile platform for several oxygen- nitrogen-containing chemicals. In our study, 5H5F was synthesized 92% yield room-temperature furfural...

Cu–Ni bimetallic nanoalloys as-prepared by an impregnation method exhibited superior catalytic activity with improved stability for levulinic acid hydrogenation to γ-valerolactone.

Abstract Cello‐oligosaccharides are biologically important molecules that can elicit a defensive immune response in plants and improve the health of animals. Cellulose, polymer glucose linked by β‐1,4‐glycosidic bonds, is an ideal feedstock for synthesis cello‐oligosaccharides. However, cello‐oligosaccharides rapidly degrade under conditions used cellulose hydrolysis. Here, was hydrolyzed over carbon catalyst semi‐flow reactor to achieve high yield (72 %). The excellent activity oxidized...

Furfural was synthesized from hexose sugars instead of 5-HMF by using polar aprotic solvents with very low basicity.

Catalysts with noble metals deposited as single atoms on metal oxide supports have recently been studied extensively due to their maximized utilization and potential for performing difficult chemical conversions owing unique electronic properties. Understanding of the reaction mechanisms supported single-metal is still limited but highly important designing more efficient catalysts. In this study, we report complexity CO oxidation mechanism Pt anatase TiO2 (PtSA/a-TiO2) by coupling density...

A combination of TiO₂–ZrO₂ and Amberlyst 70 remarkably catalyzes glucose conversion to HMF in a biphasic media.