A5101898802- Catalytic Processes in Materials Science
- Nanomaterials for catalytic reactions
- Mesoporous Materials and Catalysis
- Catalysis for Biomass Conversion
- Zeolite Catalysis and Synthesis
- Electrocatalysts for Energy Conversion
- Chemical Synthesis and Characterization
- Carbon Nanotubes in Composites
- Graphene research and applications
- Polyoxometalates: Synthesis and Applications
- Diamond and Carbon-based Materials Research
- Catalysts for Methane Reforming
- Ionic liquids properties and applications
- Asymmetric Hydrogenation and Catalysis
- Ammonia Synthesis and Nitrogen Reduction
- Catalysis and Hydrodesulfurization Studies
- Supercapacitor Materials and Fabrication
- Catalysis and Oxidation Reactions
- Graphene and Nanomaterials Applications
- Lignin and Wood Chemistry
- Advanced materials and composites
- Advancements in Battery Materials
- Additive Manufacturing Materials and Processes
- Subcritical and Supercritical Water Processes
- Chemistry and Chemical Engineering
Chinese Academy of Sciences
2014-2024
Institute of Electrical and Electronics Engineers
2020-2023
Engineering Systems (United States)
2020-2023
University of Memphis
2020-2023
Antea Group (France)
2023
China Coal Technology and Engineering Group Corp (China)
2023
Machine Science
2020-2021
Amherst College
2020-2021
University of Massachusetts Amherst
2020-2021
Canadian Standards Association
2019-2020
Nanocarbons have been extensively used as metal-free alternatives to metal catalysts in many oxidative processes owing their functional groups or defects, which the activation ability toward oxygen molecules.
Abstract The direct oxidation of benzene to phenol with H 2 O as the oxidizer, which is regarded an environmentally friendly process, can be efficiently catalyzed by carbon catalysts. However, detailed roles catalysts, especially what active site, are still a topic debate controversy. Herein, we present fundamental consideration possible mechanisms for this reaction using small molecular model Raman spectra, static secondary ion mass spectroscopy (SIMS), DFT calculations, quasi in situ...
Abstract N‐doped graphene‐like layered carbon (NG) could be synthesized via a metal‐free pyrolysis route from glucose, fructose, and 5‐hydroxymethylfurfural (5‐HMF), which are cheap widely available biomass or derivatives. A well‐developed thin‐layer structure with large lateral dimensions obtained when 5‐HMF was used as the precursor. More importantly, 5‐HMF‐derived NG gave superior performance in epoxidation reactions compared conventional catalysts of derived even similar to that cobalt...
Aufnahmebereit: Das erste Aluminophosphat-Molekularsieb mit 20-gliedrigen Porenöffnungen wurde durch Ionothermalsynthese in Gegenwart zweier Strukturbildner erhalten (siehe Bild; H weiß, C türkis, N blau). Material verfügt über ein viel stabileres -CLO-Gerüst als sein GaPO4-Analogon Cloverit, was Anwendungsmöglichkeiten Trennverfahren, Katalyse und Gasspeicherung eröffnen könnte. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents...
Carbon is emerging as an important metal-free catalyst for multiple types of heterogeneous catalysis, including thermocatalysis, photocatalysis, and electrocatalysis. However, the study mechanisms carbon catalysis has been impeded at early stage due to lack quantitative research, especially intrinsic kinetics (e.g., TOF). In many carbon-catalyzed reactions, surface oxygenated groups were found be active sites. Recently, we have shown that these could identified quantified via poisoning by...
Abstract Metal‐free carbocatalysts enriched with specific oxygenated groups different morphology and size were synthesized from glucose by hydrothermal carbonization, in which cheap widely available biomass could be converted into functionalized carbon using an environmentally benign process. The hydroxy‐ carbonyl‐enriched (HTC) used nitrobenzene reduction, higher conversion was obtained on the sphere smaller size. In Beckmann rearrangement of cyclohexanone oxime, carboxyl‐enriched HTC...
A heterogeneous N-coordinated Pt single-atom catalyst with low valence was synthesized via an "interfacial spontaneous reduction (ISR)" strategy under mild conditions, using cheap and widely available industrial raw materials. The reducing groups were modified onto commercial carbon black XC-72R, which able to reduce the species at solid–liquid interface without need of extra agent, followed by in situ coordination reduced atoms, preventing their aggregation. prepared (Pt1–N–C) acted as...
Hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) functionalized CNTs exhibited better catalytic performance than nitric acid (HNO<sub>3</sub>) oxidized samples in the reduction of nitroarenes.
Abstract The role of different oxygen functional groups on a carbon catalyst was studied in the reduction nitrobenzene by using series model molecules. carbonyl and hydroxyl played important roles, which may be ascribed to their ability activate hydrazine. In comparison, ester, ether, lactone seemed inactive, whereas carboxylic group had negative effect. reaction occurred most likely through direct route, during nitrosobenzene converted directly into aniline.
The reduction of nitrobenzene could proceed in the presence carbon. activity mainly originated from carbonyl groups on carbon surface instead metal impurities which were embedded
In this study, the properties of Ni-based filler alloy are improved by adding rare earth Sm to them and brazing at a temperature 1080 °C. Relevant tests carried out on brazed joints means electron microscopy (SEM), energy spectroscopy (EDS) X-ray diffractometry (XRD). The results show that addition can refine grain alloy, improve hardness reduce thermal damage diamond after welding. affects diffusion Cr, which reacts with interface form Cr3C2 Cr7C3, formation these two carbides improves...
Abstract Pd nanoparticles supported on carbon nanotubes (CNTs) with an average size of around 1 nm were synthesized successfully by a facile strong electrostatic adsorption (SEA) method. CNTs functionalized various surface oxygen functional groups (SFGs) obtained treating the raw concentrated HNO 3 or /H 2 SO 4 . The SFGs could decrease point zero charge (PZC) and promoted cationic complexes CNTs. In particular, intrinsic in situ formed (hydrolyzed from carboxylic anhydride groups) acid...
Abstract Die metallfreie Katalyse ist in Bezug auf nachhaltige Chemie ein breites Interesse gestoßen. Kohlenstoffkatalyse eine “grüne” Alternative für katalytische Prozesse der Gas‐ und Flüssigphase. Insbesondere Dehydrierungen Gasphase wurde dies anhand von zahlreichen Beispielen dokumentiert, wobei Kohlenstoff vielversprechender Ersatz Metalloxidsysteme sein kann. Flüssigphase, speziell organischen Synthese, aufstrebende Forschungsrichtung, die sich den letzten Jahren sehr schnell...
The strong quantum confinement effect as well abundant edges and oxygen functional groups enable nano-graphene oxide (NGO) a variety of intriguing applications such catalysis, bioimaging, drug delivery photovoltaic devices. However, the development NGO is severely hindered because difficulty in controlled mass production. Here, we report efficient synthesis with high yield ∼40 wt % by water electrolytic oxidation glassy carbon (GC). shows degree (C/O atomic ratio, ∼1.4) excellent dispersion...
Ethyl lactate is a promising green solvent, which can be produced via esterification of biomass derived lactic acid and ethanol. Herein, we report the development highly active stable polyoxometalates (POMs) supported on zeolite catalysts for synthesis ethyl lactate. Repetitive stability tests were performed using developed catalysts, comparative characterization fresh used was to understand changes in physicochemical properties catalysts. It found that low-silica Y zeolites...
Abstract Metal‐free carbocatalysts enriched with specific oxygenated groups different morphology and size were synthesized from glucose by hydrothermal carbonization, in which cheap widely available biomass could be converted into functionalized carbon using an environmentally benign process. The hydroxy‐ carbonyl‐enriched (HTC) used nitrobenzene reduction, higher conversion was obtained on the sphere smaller size. In Beckmann rearrangement of cyclohexanone oxime, carboxyl‐enriched HTC...
Inactive annealed Pd NPs can be disintegratively re-dispersed and re-activated through a HNO<sub>3</sub>vapour treatment for enhanced catalytic phenol hydrogenation.