在石墨烯/碳纳米管异构结构中选择性氧化sp键碳,以形成主导性环氧组,用于双电子氧降解
Tiantian Lu1, Mingzi Sun2, Fengmei Wang3
1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (RECAST), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin 300071, China.
带有sp-C键的Graphdiyne (GDY) 增强了两电子氧降解反应 (2e- ORR). 这项研究开发了导电,疏水的CNTs/GDY-O,用于高效的H2O2生产和稳定的Zn空气电池.
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
- 纳米技术 纳米技术
背景情况:
- 两电子氧降解反应 (2e-ORR) 对于过氧化 (H2O) 生产和非性 Zn-空气电池 (ZAB) 至关重要.
- 现有的2e-ORR的sp2结合碳电催化剂由于混合活性点和水友性而表现出活性和稳定性的局限性.
研究的目的:
- 研究具有丰富sp-C键的石墨烯 (GDY) 作为增强2e-ORR的优质材料.
- 开发一种新的电催化剂,将GDY与碳纳米管 (CNT) 结合起来,以提高性能和稳定性.
主要方法:
- 计算研究预测了GDY对2e-ORR有选择性的环氧环群的有利形成.
- 通过轻度氧化和现场CNT生长,对O-修饰GDY (CNTs/GDY-O) 覆盖的导电性和水性CNTs的实验合成.
- 电化学评估CNTs/GDY-O用于H2O2生产以及作为非性ZAB中的阴极.
主要成果:
- 通过环氧环形成,GDY证明了选择性2e-ORR途径的有利能量.
- 合成的CNTs/GDY-O实现了H2O2生产的平均法拉第效率91.8%.
- CNTs/GDY-O在中性介质中表现出超过330小时的显著稳定性,并延长了2e非性ZABs的寿命.
结论:
- GDY独特的sp-C粘合和修改结构使得高效和稳定的2eORR.
- 开发的 CNTs/GDY-O 电催化剂为 H2O2生产和储能应用提供了重大进展.
- 这项工作为设计用于选择性氧降低反应的先进碳基电催化剂提出了一个有前途的策略.
更多相关视频
08:59Dry Oxidation and Vacuum Annealing Treatments for Tuning the Wetting Properties of Carbon Nanotube Arrays
Published on: April 15, 2013
06:34Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
Published on: June 20, 2014
相关概念视频
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
Phase I Reactions: Oxidation of Carbon-Heteroatom and Miscellaneous Systems
In carbon-nitrogen systems, aliphatic and aromatic amines can undergo oxidative reactions. Secondary and tertiary amines, like those found in tricyclic antidepressants, can undergo N-dealkylation, a process that involves the oxidation of the alkyl group. In addition, oxidative...
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
Oxidative Cleavage of Alkenes: Ozonolysis
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Oxidation and Reduction of Organic Molecules
The removal of an electron from a molecule, results in a...
Preparation of Epoxides
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of...
