可编程脉冲酸性水氧化用于增强H2O2生产
Yexing Tian1, Huixin Xiang2,3, Kong Meng1
1Beijing Key Laboratory for Green Catalysis and Separation, College of Materials Science & Engineering, Beijing University of Technology, Beijing, 100124, P. R. China.
Angewandte Chemie (International ed. in English)
|October 31, 2025
概括
本研究介绍了可编程脉冲电位电解 (PPE) 与机器学习 (ML) 优化,用于在酸性条件下高效的过氧化 (H2O2) 合成. 这种新的方法显著提高了H2O2的生产速度和法拉第克效率,使用添加剂的钻石催化剂.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 过氧化 (H2O2) 是一种重要的化学物质,具有广泛的医疗和工业用途.
- 通过水氧化反应 (WOR) 在酸性介质中有效的H2O2电合成仍然是一个重大挑战.
- 添加钻石 (BDD) 是电化学应用的一个有前途的催化剂.
研究的目的:
- 为在酸性条件下开发一种新的,优化的H2O2电合成方法.
- 研究可编程脉冲电位电解 (PPE) 和机器学习 (ML) 对H2O2生产的影响.
- 阐明在BDD催化剂上生成H2O2的机制.
主要方法:
- 使用可编程脉冲电位电解 (PPE) 在合金钻石 (BDD) 催化剂上进行H2O2的电合成.
- 使用机器学习 (ML) 优化个人防护设备参数.
- 用实验方法和密度函数理论 (DFT) 方法对BDD催化剂表面的表征和反应中间体的分析.
主要成果:
- 实现了64.16%的高法拉代效率 (FE) 和H2O2.2.1的25.62μmol cm−2 min−1的生产率.
- 与恒定电位电解 (CPE) 相比,FE增加了28.9倍,H2O2产量增加了51.8倍.
- 确定H2O2生成受非法拉第电流和阴极化影响,增强表面C-H功能群.
结论:
- 可编程脉冲电位电解 (PPE) 与ML优化相结合,为H2O2电合成提供了一个高度有效的策略.
- 这项研究揭示了一种机制性途径,涉及 •OH 基的形成,用于 H2O2 生产.
- 这项工作突出了先进的电化学技术和ML优化化学合成的潜力.
相关概念视频
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
7.2K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
7.2K
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis
3.9K
Hydrolysis of esters under acidic conditions proceeds through a nucleophilic acyl substitution. In the presence of excess water, the reaction proceeds in a reversible manner, forming carboxylic acids and alcohols.
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
3.9K
Catalysis
30.1K
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.
30.1K
Radical Autoxidation
3.1K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
3.1K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
16.3K
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.
16.3K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
12.5K
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.
12.5K


