相关实验视频

Updated: Jul 18, 2025

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Published on: October 20, 2023

垂直堆叠的石墨烯/h-BN异构结构的界面工程作为高效的过氧化合成电催化剂

Yuying Zhao^1,2, Xiang Xu¹, Qixin Yuan¹

¹Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China. fanmengmeng370@njfu.edu.cn.

Materials horizons

|August 23, 2023

概括

垂直堆叠的石墨烯/六边形化异构结构通过2电子氧降解反应催化过氧化合成. 这种新型催化剂表现出卓越的性能,在性环境中提供高选择性和效率.

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:

石墨烯/六角化 (G/h-BN) 异构结构已经显示出通过2e氧减氧反应 (ORR) 的H2O合成的前景.
与平面内配置相比,对垂直堆叠的G / h-BN异构结构存在有限的研究.

研究的目的:

为了制造和评估垂直堆叠的G/h-BN异构结构的催化性能,用于H₂O₂合成.
研究2eORR中垂直堆叠的G/h-BN异构结构的活性位点和反应机制.

主要方法:

使用模拟化学蒸汽沉积方法制造垂直堆叠的G / h-BN异构结构,涉及在多孔的h-BN板上的石墨烯量子点 (GQD) 的现场生长.
在性环境下进行电催化性能测试.
密度函数理论 (DFT) 模拟以了解催化机制并识别活性位点.

主要成果:

垂直堆叠的G/h-BN异构结构在一个广泛的潜在范围 (0.35-0.7V对RHE) 上实现了高的H₂O₂选择性 (90-99%).
催化剂的效率超过90%,其高质量活性为1167mmolg_catalyst^-1 h^-1.
DFT模拟确定了以B为中心的AB堆叠模型中的边缘B原子,作为2eORR的主要活性催化位点.

结论:

垂直堆叠的G/h-BN异构结构通过2eORR表现出优异的催化活性和H2O生产的选择性.
这项研究为垂直堆叠的异构结构提供了一个简单的制造路线,并突出了它们作为高效电催化剂的潜力.

更多相关视频

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle

Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle

Published on: September 22, 2015

相关概念视频

Catalysis

Catalysis

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.

Interfacial Electrochemical Methods: Overview

Interfacial Electrochemical Methods: Overview

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...

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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...