布伦斯特德基促进界面质子转移,用于增强生物质电催化
Jia Wu1, Jianlong Zhang1, Zhixiang Zhai1
1Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University 100 Daxue Road Nanning 530004 China wenhuan@gxu.edu.cn yinshibin@gxu.edu.cn.
Chemical science
|August 6, 2025
概括
在催化剂中引入酸盐组显著增加了5-基甲基 (HMF) 的电氧化. 这种增强改善了界面质子转移,从而有效地从生物质中生产2,5-furandicarboxylic 酸.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 生物质转换生物质转换
背景情况:
- 对5-基甲基 (HMF) 的高效电氧化对于生物质价值化至关重要.
- 缓慢的界面质子转移动力学限制了当前HMF氧化反应 (HMFOR) 的效率.
研究的目的:
- 调查布伦斯特德基对增强HMF电氧化的基催化剂的影响.
- 为了改善HMFOR的界面质子转移动力学.
主要方法:
- 密度函数理论 (DFT) 的计算.
- 在现场光谱学.
- 电化学实验 电化学实验
主要成果:
- 在催化剂上的酸盐 (Pi) 功能化在HMF脱过程中加速了界面质子转移.
- 与未经修改的相比,pi功能化催化剂的电流密度增加了6.5倍.
- 在1000 mA cm-2和1.41 VRHE时实现了对2,5-furandicarboxylic 酸近100%的选择性.
结论:
- 使用布伦斯特德基的表面功能化,特别是基,有效调节质子转移动力学.
- 该战略为设计用于工业HMFOR应用的高效催化剂提供了一条途径.
相关概念视频
Brønsted-Lowry Acids and Bases
20.4K
In 1923, the Brønsted–Lowry definition of acids and bases was proposed by Johannes Brønsted and Thomas Lowry. According to this theory, a Brønsted acid is defined as a species that donates a proton in a chemical reaction and gets converted to its conjugate base. A Brønsted base is defined as a species that accepts a proton in a chemical reaction and gets converted into its conjugate acid. These transfers of protons are caused by the displacement of electrons in these reactions, which is...
20.4K
Interfacial Electrochemical Methods: Overview
388
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
388
Bronsted-Lowry Acids and Bases
94.4K
The acid-base reaction class has been studied for quite some time. In 1680, Robert Boyle reported traits of acid solutions that included their ability to dissolve many substances, to change the colors of certain natural dyes, and to lose these traits after coming in contact with alkali (base) solutions. In the eighteenth century, it was recognized that acids have a sour taste, react with limestone to liberate a gaseous substance (now known to be CO2), and interact with alkalis to form neutral...
94.4K
Lewis Acids and Bases
44.8K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
44.8K
Water: A Bronsted-Lowry Acid and Base
52.1K
The reaction between a Brønsted-Lowry acid and water is called acid ionization. For example, when hydrogen fluoride dissolves in water and ionizes, protons are transferred from hydrogen fluoride molecules to water molecules, yielding hydronium ions and fluoride ions:
52.1K
Titration in Nonaqueous Solvents
957
Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
957


