3D氧化物衍生的Ru催化剂,用于超高效的化levulinic酸 γ-valerolactone
Shanshan Wang1, Zewen Zhuang2,3, Xin Chen4
1Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China.
Small (Weinheim an der Bergstrasse, Germany)
|October 8, 2023
概括
研究人员开发了一种新的3D催化剂,用于将生物质衍生的酸 (LA) 转化为有价值的γ-黄 (GVL). 这种高效的催化剂显著加速化过程,提供了更绿色的化学生产途径.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- γ-黄 (GVL) 是一种从生物质中获得的关键平台化学物质.
- 酸 (LA) 是生产GVL的关键生物质衍生品.
- 需要有效的催化方法来使LA化为GVL.
研究的目的:
- 开发一种超高效的3D (Ru) 催化剂,用于将LA化为GVL.
- 为了研究新型催化剂的结构-活性关系.
- 了解增强催化性能的机制.
主要方法:
- 合成RuZnOx纳米盒,然后进行现场减少,以创建氧化物衍生的Ru (IOD-Ru) 集群.
- 使用先进技术分析催化剂结构和形态的表征.
- 催化测试LA化到GVL,测量周转频率 (TOF).
- 密度函数理论 (DFT) 计算以探测反应机制.
主要成果:
- 一个具有高度分散的3DRu催化剂,约1纳米的IOD-Ru集群被限制在半孔纳米中,已成功合成.
- IOD-Ru催化剂实现了创纪录的TOF59,400h-1的LA化,比ex situ减少催化剂高14倍.
- 缺陷丰富和协调不和的IOD-Ru位点被确定为促进LA碳基激活的关键.
- 理论计算证实,由于这些活性站点,化能量的能量障碍显著降低.
结论:
- 开发的3D IOD-Ru催化剂在LA的GVL生产中表现出了卓越的性能.
- 催化剂的独特纳米结构和缺陷部位对于其高活性和选择性至关重要.
- 这项工作为设计用于生物质转化和绿色化学应用的先进催化剂提供了有希望的策略.
相关概念视频
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.3K
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...
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...
3.3K
Reduction of Alkenes: Catalytic Hydrogenation
12.1K
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...
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...
12.1K
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation
4.6K
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...
4.6K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
7.8K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
7.8K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.3K
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.
10.3K
Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
4.2K
Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is...
The carbonyl center is...
4.2K


