催化作用
解吸
X射线光电子能谱
拉曼光谱
氧气
分解
化学
氢
制氢
无机化学
氨
热脱附光谱法
氮气
吸附
物理化学
化学工程
有机化学
生物化学
物理
光学
工程类
作者
Eun-Jeong Kim,Young Woo Kim,Tae Wan Kim,Young Woong Suh,Chae‐Ho Shin,Kwangjin An,Hyung‐Ki Min
出处
期刊:Fuel
[Elsevier]
日期:2023-12-01
卷期号:354: 129293-129293
标识
DOI:10.1016/j.fuel.2023.129293
摘要
Controlling active metal–support interaction is critical in the catalytic decomposition of ammonia (NH3). In this study, we investigated the generation of oxygen vacancies in the SiCeOx support by Si addition and the increase in catalytic performance for the decomposition of NH3 by their interaction with Ru. The Si content in the Ru/SiCeOx catalysts was controlled by glassware elution during the precipitation of Ce(NO3)3 at a high pH level (10.5) by applying different aging temperatures and times. The formation of oxygen vacancies by the insertion of Si4+ into the CeO2 lattice was characterized by O2-pulse experiments as well as Raman and X-ray photoelectron spectroscopy analyses. The effect of oxygen vacancies on the adsorption strengths of hydrogen and nitrogen on Ru was characterized by H2-temperature-programmed reduction and NH3-temperature-programmed desorption. The correlation between NH3 conversion, oxygen vacancy content, and nitrogen desorption temperature was experimentally proven.
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