相关实验视频

Updated: Aug 13, 2026

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

废旧电池阴极材料LiMn₂O₄转化为高效的超低温NH₃-SCR催化剂:的突子交换协同修饰

Xin Yang¹, Kaijie Liu¹, Xinyu Han¹

¹School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China.

Journal of hazardous materials

|August 11, 2023

概括

回收废旧电池创造了一种新的催化剂,用于在超低温下选择性催化降解氨 (NH3-SCR). 这种改性LiMn2O4材料有效地转化氧化物 (NOx),同时提高的选择性.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
催化剂是一种催化剂.

背景情况:

在超低温 (≤150°C) 条件下研制有效的催化剂,用于选择性催化降解氨 (NH3-SCR),这对于环境保护至关重要.
资源回收,特别是废物回收,是可持续环境实践的一个重要方面.

研究的目的:

通过修改废旧电池材料,创建超低温NH3-SCR的高价值催化剂.
为了研究NOx净化改性催化剂的性能和潜在机制.

主要方法:

通过离子交换和氧化物加载对LiMn2O4 (废电池阴极材料) 的修改.
对NH3-SCR的催化剂的性能评估,包括在超低温度下NOx转换和N2选择性.
使用in-situ DRIFTS和第一原理计算进行表征,以阐明反应机制.

主要成果:

优化的LiMn2O4-0.5V-10H催化剂在150°C时实现了96%的NOx转化和>70%的N2选择性.
交换增加了表面酸度,而氧化物调节了氧化还原能力并增加了酸性位点.
现场推移和理论计算显示了增强的NH3吸附,减弱的NO吸附,并促进了酸盐的分解,抑制了酸盐的形成,从而提高了N2的选择性.

结论:

在LiMn2O4上的双修改策略 (H和V) 对于设计高性能超低温NH3-SCR催化剂是有效的.
这种方法提供了一种简单,廉价的方法,用于高价值的废电池利用.
这些发现为开发在低温下运行的高效的NOx净化催化剂提供了新的途径.

关键词:

交换气的交换方式李明 (LiMn(2)O(4) 的时间.NH(3) -SCR 额外债务负债权超低温的温度超低的温度.的修改是对的修改.

更多相关视频

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

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

Batteries and Fuel Cells

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...

Microbial Fuel Cells

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...