Related Experiment Video
Updated: Jun 14, 2025
Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether
Published on: August 17, 2019
Synthesis of FeOOH Polymorphs by Room Temperature Solid-State Chemical Reaction: Effect on the Selective Cracking of
Jinhua Wang1, Yakun Tang1, Xiaodong Guo1
1State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources; Key Laboratoryof Energy Materials Chemistry, Ministry of Education; College of Chemistry, Xinjiang University, Urumqi 830017, China.
Abstract:
FeOOH polymorphs are valued in industrial catalysis for selective hydrogenation of organics in coal to high - value aromatics, yet the factors behind their differing efficiencies are still unclear. In this work, the synthesis of FeOOH nanopolymorphs with sizes from 80 to 300 nm was achieved through a simple, efficient, and environmentally friendly room temperature solid-phase chemical reaction. FeOOH polymorphs demonstrate different iron oxidation states and abundant surface hydroxyls. Among them, δ-FeOOH, with its lower iron oxidation state and rich surface hydroxyls, enhances hydrogen adsorption and lowers hydrogen activation energy through hydrogen bonding. Notably, δ-FeOOH achieved the complete conversion of benzyl phenyl ether, a typical α-O-4 linkage model compound in coal at 270 °C and 20 bar H2 for 2 h. This study provides valuable insights into the intricate relationship between FeOOH polymorphs and catalytic performance, contributing to the sustainable development of FeOOH-based hydrogenation catalysts.
Related Concept Videos
02:44Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
01:13Olefin Metathesis Polymerization: Overview
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
01:16Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
01:27Benzene to Phenol via Cumene: Hock Process
03:00Preparation of Epoxides
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
02:36Regioselectivity and Stereochemistry of Hydroboration
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...