相关实验视频

Updated: Jul 13, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

帕拉被氧和TiO₂覆盖层封装为低温SO₂ - 在CO氧化过程中耐受性催化

Jingkun Chen¹, Yuetan Su¹, Qingjie Meng²

¹Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, P. R. China.

Angewandte Chemie (International ed. in English)

|October 18, 2023

概括

我们使用氧化物金属相互作用 (OMI) 开发了一种新的耐硫氧化催化剂. 这种二氧化催化剂表现出极好的稳定性和对一氧化碳氧化反应的反应性,即使存在二氧化硫.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
表面化学表面化学

背景情况:

硫中毒在现实应用中显著限制了催化剂的寿命.
开发抗硫中毒的氧化催化剂对于工业过程至关重要.

研究的目的:

设计和合成一种新型的氧化物-金属相互作用 (OMI) 催化剂,增强对硫中毒的抗性.
为了研究一氧化碳氧化过程中的OMI催化剂的催化活性和稳定性.

主要方法:

使用有机涂层合成具有TiO2覆盖层的逆催化剂.
催化剂结构和组成的表征.
在各种条件下对CO氧化发生的催化性能的评估,包括存在SO2.
密度函数理论 (DFT) 计算以阐明SO2电阻的机制.

主要成果:

一个氧化物-金属相互作用 (OMI) 催化剂与超小的Pd和TiO2颗粒成功合成.
核心 (Pd) - (TiO2) OMI催化剂在CO氧化过程中表现出异常的反应性和稳定性.
催化剂对SO2中毒具有很好的抵抗力,在120°C下在100ppmSO2下保持了240小时的强大性能.
DFT的计算显示,Pd-O-Ti位点的界面氧原子充当活性位点并改变SO2吸附路径.

结论:

开发的OMI催化剂为抗硫中毒的氧化催化剂提供了一个有前途的解决方案.
独特的界面结构和活性位点是催化剂高稳定性和低温CO氧化活性的关键.
这项工作为设计适用于具有挑战性的工业环境的强大的催化剂提供了洞察力.

关键词:

氧化CO 氧化CO 氧化非金属活动场所非金属活动场所氧化物与金属的相互作用稳定的稳定性稳定的稳定性硫耐受度硫耐受度

更多相关视频

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Published on: July 18, 2017

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

相关概念视频

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

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.