In-situ confinement of ultrasmall palladium nanoparticles in silicalite-1 for methane combustion with excellent activity and hydrothermal stability

被引：90

作者：

Wang, Wangyang ^{[1
]}

Zhou, Wei ^{[1
]}

Li, Wei ^{[1
]}

Xiong, Xuewei ^{[1
]}

Wang, Yuhao ^{[1
]}

Cheng, Kang ^{[1
]}

Kang, Jincan ^{[1
]}

Zhang, Qinghong ^{[1
]}

Wang, Ye ^{[1
]}

机构：

[1] Xiamen Univ, Natl Engn Lab Green Chem Prod Alcohols Ethers & E, Collaborat Innovat Ctr Chem Energy Mat, Coll Chem & Chem Engn,State Key Lab Phys Chem Sol, Xiamen 361005, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 276卷

基金：

中国国家自然科学基金;

关键词：

Methane combustion; Confinement; Palladium; Hydrophobicity; Water-resistance; METAL-SUPPORT INTERACTION; PD-BASED CATALYSTS; LOW-TEMPERATURE; HETEROGENEOUS CATALYSTS; EXCEPTIONAL ACTIVITY; COMPLETE OXIDATION; SULFUR-DIOXIDE; ZEOLITE; CO; PERFORMANCE;

D O I：

10.1016/j.apcatb.2020.119142

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Maximizing the use of palladium without compromises in catalytic activity and stability in the combustion of methane is extremely challenging due to the harsh operation conditions. To achieve this goal, a series of core-shell-structured catalysts with different amounts of palladium nanoparticles confined in hydrophobic silicalite-1 (Pd@S-1) was designed. Unexpectedly, a volcanic trend between catalytic activity and palladium loading was found as the loading increased from 0.3 wt% to 1.6 wt%, among which the 0.6 wt%Pd@S-1 exhibited the highest catalytic activity with a complete combustion temperature of 380 degrees C. Besides, the 0.6 wt%Pd@S-1 showed an ultrahigh stability in the high temperature applications due to the spatial confinement of palladium inside the rigid zeolite matrix. Moreover, owing to the hydrophobicity of the pure silica zeolite, the Pd@S-1 could selectively hinder the diffusion of water vapor into the palladium sites, leading to the outstanding water-resistance ability.

引用

页数：9

共 66 条

[51] High stability and activity of solution combustion synthesized Pd-based catalysts for methane combustion in presence of water [J].