A composite catalyst including palladium nanoparticles on titania (TiO2) and on nitrogen-modified porous carbon (Pd/TiO2@N-C) is synthesized from palladium salts, tetrabutyl titanate, and chitosan. N2 sorption isotherms show that the catalyst has a high BET surface area (229 m(2) g(-1)) and large porosity. XPS and TEM characterization of the catalyst shows that palladium species with different chemical states are well dispersed across the TiO2 and nitrogen-modified porous carbon, respectively. The Pd/TiO2@N-C catalyst is very active and shows excellent stability towards hydrogenation of vanillin to 2-methoxy-4-methylphenol using formic acid as hydrogen source. This activity can be attributed to a synergistic effect between the Pd/TiO2 (a catalyst for dehydrogenation of formic acid) and Pd/N-C (a catalyst for hydrogenation of vanillin) sites.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/cssc.201400039 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Qualitative and Comparative Study of APORT Apple Peel Based on UPLC-Q-TOF-MS Technology and Fruit Peel Comparison of Different Provenances.
Phytochem Anal
January 2025
School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China.
Objective: This study aimed to qualitatively study the main chemical components of apple peel in APORT, Kazakhstan, by ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS) and to compare the components of apple peels with different provenances.
Methods: An ACQUITY UPLC HSS T3 (100 mm × 2.1 mm, 1.
Simultaneous determination of busulfan, fludarabine, phenytoin, and posaconazole in plasma from patients undergoing hematopoietic stem cell transplantation.
J Pharm Biomed Anal
January 2025
Department of Pharmacy, Hebei Children's Hospital, Shijiazhuang, Hebei 050031, China. Electronic address:
A simple, fast, sample-saving, and sensitive liquid chromatography-tandem mass spectrometry method was established with a linear range adjusted by in-source collision-induced dissociation. Notably, this could simultaneously determine busulfan, fludarabine, phenytoin, and posaconazole in plasma from children, each having unique physical and chemical properties. The procedure necessitated only 20 μL of plasma and involved a simple protein precipitation process.
View Article and Find Full Text PDFDevelopment and validation of a sensitive LC-MS/MS assay for determination of upadacitinib in human plasma and its application in patients with inflammatory bowel disease.
J Pharmacol Toxicol Methods
January 2025
Department of Pharmacy, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; Department of Gastroenterology, the Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. Electronic address:
Background: Upadacitinib is a selective Janus kinase (JAK) 1 inhibitor approved by the Food and Drug Administration for the treatment of moderate-to-severe inflammatory bowel disease (IBD). We aimed to establish and validate a method for determining Upadacitinib in patients with IBD by liquid chromatography-tandem mass spectrometry (LC-MS/MS) method.
Methods: The mobile phase was 0.
Advancing anthocyanin extraction: Optimising solvent, preservation, and microwave techniques for enhanced recovery from merlot grape Marc.
Food Chem
December 2024
Wine Science Programme, School of Chemical Sciences, The University of Auckland | Waipapa Taumata Rau, 23 Symonds Street, Auckland 1010, New Zealand. Electronic address:
Grape marc, a by-product of winemaking, is a rich source of bioactive compounds, yet efficient extraction methods suitable for industrial application remain underexplored. This study presents an integrated, three-stage approach to optimise the extraction of anthocyanins, phenolics, and tannins from Merlot grape marc. In the first stage, 12 solvents were evaluated using conventional solvent extraction, with 50 % ethanol (EtOH) acidified with hydrochloric acid (HCl) achieving the highest anthocyanin recovery after eight extraction cycles (0.
View Article and Find Full Text PDFIdentification of chemical constituents and absorbed components in rat serum of (L.) Jacq. by UPLC-Q-exactive-MS.
Nat Prod Res
January 2025
College of Pharmacy, Guangxi Key Laboratory of Zhuang and Yao Ethnic Medicine, Guangxi University of Chinese Medicine, Nanning, China.
(L.) Jacq. has anti-inflammatory, analgesic, haemostatic and antioxidant effects, but its pharmacological components are still unclear.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!