相关实验视频

Updated: May 20, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

定制CuFeO_x基催化氧气载体用于晶格氧气诱导的甲醇氧化蒸汽改制

Feng Tan¹, Zhiqiang Sun²

¹Central South University, School of Energy and Engineering, CHINA.

|May 19, 2025

概括

这项研究开发了新的铜铁氧化物 (CuFeOx) 催化剂,用于高效的甲醇重制,产生高产量,降低CO2输出. 优化的Cu2Fe3催化剂表现出清洁能解决方案的卓越性能和稳定性.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
化学工程是化学工程的重要组成部分.
可再生能源可再生能源是可再生能源.

背景情况:

甲醇改造为储存和供应提供了一条途径,但面临着CO产生和催化剂停用方面的挑战.
开发高效和稳定的催化剂对于推进能技术至关重要.

研究的目的:

制造和研究基于CuFeOx的催化氧载体 (COCs),具有不同的Cu-to-Fe比率,用于网状氧诱导的甲醇重制.
通过调整晶格氧气流动性来提高气生产效率和催化剂稳定性.

主要方法:

一系列CuFeOx COCs的合成,具有受控的Cu-Fe分子比.
通过在220°C的甲醇改造实验评估催化活性和稳定性.
在现场扩散反射红外里埃变换光谱 (DRIFTS) 识别反应中间体.

主要成果:

Cu2Fe3催化剂表现出最高的催化活性,实现的生产率为93.9 mmol·H2·h−1·g−1.1.
优化的Cu-to-Fe比率增强了晶格氧气的流动性,导致甲醇的高效氧化蒸汽改造.
催化剂在20个循环中表现出稳定的还氧循环,这表明其耐用性很好.

结论:

基于CuFeOx的COCs,特别是Cu2Fe3,对于晶格氧诱导的甲醇改造是有效的,为生产提供了一个有前途的途径.
催化剂中的CuO和CuFe5O8的协同作用促进了高效的甲醇重制,减少了CO副产品.
已确定的反应途径涉及桥梁形式物种作为关键中间体,导致H2和CO2的产生.

关键词:

的生产生产的生产.甲醇的改革甲醇的改革催化氧载体是一种催化氧载体.网格中的氧气.氧化还原循环的循环.

更多相关视频

Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether

Tuning the Acidity of Pt/ CNTs Catalysts for Hydrodeoxygenation of Diphenyl Ether

Published on: August 17, 2019

Fabrication and Testing of Catalytic Aerogels Prepared Via Rapid Supercritical Extraction

Fabrication and Testing of Catalytic Aerogels Prepared Via Rapid Supercritical Extraction

Published on: August 31, 2018

相关概念视频

Oxidative Cleavage of Alkenes: Ozonolysis

Oxidative Cleavage of Alkenes: Ozonolysis

In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.

Reduction of Alkenes: Catalytic Hydrogenation

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.

Oxymercuration-Reduction of Alkenes

Oxymercuration-Reduction of Alkenes

Oxymercuration–reduction of alkenes is one of the major reactions converting alkenes to alcohols. It involves the hydration of alkenes with mercuric acetate in a mixture of tetrahydrofuran and water, forming an organomercury adduct. This is followed by a demercuration step in which the adduct is reduced to an alcohol using sodium borohydride.

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...