γ-MnO2作为RuO的电子储备2氧进化催化剂在酸性介质中
Wenqi Jia1, Xuejie Cao1, Xiaojie Chen1
1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, 300071, China.
Small (Weinheim an der Bergstrasse, Germany)
|April 10, 2024
概括
一个新的RuO2/MnO2/CC催化剂通过使用MnO2作为电子储来增强酸性水的氧化,提高了有效,低成本的生产的活性和稳定性.
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:
- 由于动力学缓慢,在酸性条件下开发活性和持久的氧化演化反应 (OER) 催化剂至关重要.
- 二氧化卢 (RuO2) 是OER的基准催化剂,但其稳定性较差,成本较高.
研究的目的:
- 提出电子水库调节策略,以提高酸性水的氧化性能.
- 在碳布 (CC) 上构建一个RuO2/MnO2异构结构,以改善OER催化.
主要方法:
- 在碳布 (CC) 上制造RuO2/MnO2异构结构.
- 利用理论计算和实验验证来研究催化剂性能.
- 通过长期在硫酸中电解来测试催化剂的耐用性.
主要成果:
- MnO2充当电子储存器,促进电子转移,增强RuO2的活性和稳定性.
- RuO2/MnO2/CC催化剂在10 mA cm-2.2时实现了189 mV的超小电位.
- 经过800小时的电解,表现出优异的稳定性,没有失活.
- 在一个质子交换膜水电解器中,达到0.00962美元的低贵金属成本.
结论:
- 在酸性水氧化方面,RuO2/MnO2/CC催化剂的性能明显优于商业RuO2.
- 电子储策略有效地提高了催化剂活性和耐用性.
- 这种具有成本效益的催化剂显示出在水分裂中实际应用的巨大潜力.
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 Alcohols
13.0K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
13.0K
Oxymercuration-Reduction of Alkenes
7.5K
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.
7.5K
Redox Equilibria: Overview
564
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
564
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
11.4K
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.
11.4K


