相关实验视频

Updated: Jul 24, 2025

Synthesis and Functionalization of Nitrogen-doped Carbon Nanotube Cups with Gold Nanoparticles as Cork Stoppers

Synthesis and Functionalization of Nitrogen-doped Carbon Nanotube Cups with Gold Nanoparticles as Cork Stoppers

Published on: May 13, 2013

富含电子的Au纳米晶/Co₃O₄接口用于增强的电化学酸盐降解为氨

Maolin Zhang¹, Kepeng Song², Chen Liu³

¹Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.

Journal of colloid and interface science

|July 4, 2023

概括

这项研究增强了使用金纳米晶-氧化物催化剂减少酸盐的氨产量. 新型催化剂设计显著提高了可持续废水处理的效率和选择性.

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
环境科学环境科学

背景情况:

废水中的酸盐 (NO3-) 构成环境风险.
电化学酸盐还原反应 (NO3-RR) 为氨 (NH3) 提供了一个可持续的途径.
氧化物对NO3-RR有希望,但催化剂设计是提高效率的关键.

研究的目的:

为了提高电化学NO3-RR到NH3的效率.
为了研究金 (Au) 种对氧化物 (Co3O4) 催化剂的影响.
开发一个太阳能驱动的系统,用于NO3-RR到NH3.

主要方法:

合成的Au纳米晶体装饰了Co3O4催化剂.
使用电化学技术表征催化剂性能 (发作潜力,产率,法拉第效率).
运用理论计算来理解反应机制.
集成了一个太阳能电池和电解器,用于一个原型系统.

主要成果:

与纯Co3O4或具有较小Au物种的催化剂相比,Au纳米晶-Co3O4表现出更高的NH3产量 (27.86μg/h·cm2) 和Faradaic效率 (83.1%) .
理论计算显示,由于Au-Co3O4的电荷转移,关键化步骤的能量障碍降低,演变反应 (HER) 被抑制.
一个无助太阳能驱动的NO3-RR原型实现了高NH3产率 (4.65毫克/小时) 和FE (92.1%).

结论:

纳米晶装饰有效地提高了CO3O4催化剂对NO3-RR的性能.
Au和Co3O4之间的协同效应对于改善催化活性和选择性至关重要.
这项工作展示了一种有前途的太阳能驱动方法,用于从含有酸盐的废水中可持续合成氨.

关键词:

其他纳米晶体-Co(3) O(4)电子转移是指电子的转移.接口接口接口接口亚酸盐的降解方法由太阳能驱动的太阳能驱动.

更多相关视频

Gold Nanoparticle Modified Carbon Fiber Microelectrodes for Enhanced Neurochemical Detection

Gold Nanoparticle Modified Carbon Fiber Microelectrodes for Enhanced Neurochemical Detection

Published on: May 13, 2019

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

相关概念视频

2° Amines to N-Nitrosamines: Reaction with NaNO2

2° Amines to N-Nitrosamines: Reaction with NaNO₂

Secondary amines react with nitrous acid to form N-nitrosamines, as depicted in Figure 1. Nitrous acid, a weak and unstable acid, is formed in situ from an aqueous solution of sodium nitrite and strong acids, such as hydrochloric acid or sulfuric acid, in cold conditions. In the presence of an acid, the nitrous acid gets protonated. The subsequent loss of water results in the formation of the electrophile known as nitrosonium ion.

Formation of Complex Ions

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...