有的边界丰富的碳基电催化剂 (II) - 协调活性环境,用于选择性合成过氧化
Ling-Yu Dong1, Jing-Song Wang1, Tian-Yi Li1
1State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, Liaoning, P. R. China.
Angewandte Chemie (International ed. in English)
|February 1, 2024
概括
这项研究引入了新的电催化剂,通过两电子氧降解来有效生产过氧化 (H2O2). 催化剂实现了创纪录的高生产率和选择性,使下游化学合成成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 基于 (Mn) 的电催化剂由于其电子可调性,低毒性和丰富性,对催化有希望.
- 通过两电子氧降解 (2e-ORR) 选择性合成过氧化 (H2O2) 仍然是Mn中心催化剂的挑战.
研究的目的:
- 开发以Mn为中心的电催化剂,通过2e-ORR选择性地产生H2O2.
- 使用新型催化剂设计,提高H2O2的生产速度和效率.
主要方法:
- 制造具有边界丰富的多孔碳基电催化剂,具有二次Mn ((II) 协调活性环境.
- 电化学表征以评估H2O2生产性能,包括法拉第克效率和生产力.
- 机制研究包括现场表征和多尺度模拟,以阐明催化机制.
主要成果:
- 开发的电催化剂在H2O2生产中实现了近100%的法拉第效率.
- 创纪录的高H2O2生产率15.1molgcat-1h-1在0.1V与RHE被证明是基于Mn的催化剂.
- 机械洞察力揭示了通过环氧/基组改进的旋转状态和定制的*OOH吸附,以及在高曲率碳边界上的O2丰富.
结论:
- 新型Mn ((II) 协调电催化剂有效地促进了选择性H2O2电合成.
- 催化剂的设计促进了反应剂的丰富和优化中间吸附,从而导致前所未有的催化活性.
- 高效的H2O2生产直接使得高产量的酸溶解成胺,展示了实际应用的潜力.
更多相关视频
相关概念视频
Radical Oxidation of Allylic and Benzylic Alcohols
2.0K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
2.0K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.5K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.5K
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
Catalysis
26.9K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
26.9K


