Pd/NiAl2O4催化剂上甲烷燃烧反应的红外光谱研究

采用原位红外光谱研究了Pd/NiAl2O4催化剂上甲烷燃烧反应机理,考察了Pd在载体上的氧化-还原状态对催化剂性能的影响.结果表明,甲酸盐向碳酸盐的转化是反应的控制步骤.经预还原处理的催化剂在贫燃富氧条件下反应一段时间后,活性组分仍为Pd-PdO混合形态;Pd单质的存在使O2在其上吸附形成活性O2-物种,从而促进了甲酸盐向碳酸盐的转化....

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Published in催化学报 Vol. 33; no. 9; pp. 1552 - 1557
Main Author 刘莹 王胜 高典楠 潘秋实 王树东
Format Journal Article
LanguageChinese
Published 1中国科学院大连化学物理研究所,辽宁大连1160232中国科学院研究生院,北京100049 2012
Subjects
催化燃烧
原位红外
甲烷
钯
镍铝尖晶石
甲烷
镍铝尖晶石
原位红外
钯
催化燃烧
Online AccessGet full text
ISSN0253-9837
1872-2067
DOI10.3724/SP.J.1088.2012.20535

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Abstract 采用原位红外光谱研究了Pd/NiAl2O4催化剂上甲烷燃烧反应机理,考察了Pd在载体上的氧化-还原状态对催化剂性能的影响.结果表明,甲酸盐向碳酸盐的转化是反应的控制步骤.经预还原处理的催化剂在贫燃富氧条件下反应一段时间后,活性组分仍为Pd-PdO混合形态;Pd单质的存在使O2在其上吸附形成活性O2-物种,从而促进了甲酸盐向碳酸盐的转化.
AbstractList O643; 采用原位红外光谱研究了 Pd/NiAl2O4催化剂上甲烷燃烧反应机理,考察了 Pd 在载体上的氧化-还原状态对催化剂性能的影响.结果表明,甲酸盐向碳酸盐的转化是反应的控制步骤.经预还原处理的催化剂在贫燃富氧条件下反应一段时间后,活性组分仍为 Pd-PdO 混合形态; Pd 单质的存在使 O2在其上吸附形成活性 O2–物种,从而促进了甲酸盐向碳酸盐的转化.
采用原位红外光谱研究了Pd/NiAl2O4催化剂上甲烷燃烧反应机理,考察了Pd在载体上的氧化-还原状态对催化剂性能的影响.结果表明,甲酸盐向碳酸盐的转化是反应的控制步骤.经预还原处理的催化剂在贫燃富氧条件下反应一段时间后,活性组分仍为Pd-PdO混合形态;Pd单质的存在使O2在其上吸附形成活性O2-物种,从而促进了甲酸盐向碳酸盐的转化.
Author 刘莹 王胜 高典楠 潘秋实 王树东
AuthorAffiliation 中国科学院大连化学物理研究所,辽宁大连116023 中国科学院研究生院,北京100049
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Issue 9
Keywords 甲烷
镍铝尖晶石
原位红外
钯
催化燃烧
Language Chinese
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Notes LIU Ying, WANG Sheng, GAO Diannan, PAN Qiushi, WANG Shudong（ 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China）
palladium; nickel aluminum spinel; methane; catalytic combustion; in-situ infrared spectroscopy
21-1195/O6
The mechanism of methane combustion on Pd/NiAl2O4 catalyst was studied by in-situ FT-IR spectroscopy. The results showed that the transformation from formate to carbonate was the rate-determining step for the reaction. After reaction under lean fuel condition, the active site of pre-reduced catalyst was still Pd-PdO mixed phase. The existence of metal Pd would convert O2 to O2- species, which would facilitate the transformation from formate to carbonate.
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PublicationTitleAlternate Chinese Journal of Catalysis
PublicationTitle_FL Chinese Journal of Catalysis
PublicationYear 2012
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Snippet 采用原位红外光谱研究了Pd/NiAl2O4催化剂上甲烷燃烧反应机理,考察了Pd在载体上的氧化-还原状态对催化剂性能的影响.结果表明,甲酸盐向碳酸盐的转化是反应的控制步骤.经预还...
O643; 采用原位红外光谱研究了 Pd/NiAl2O4催化剂上甲烷燃烧反应机理,考察了 Pd 在载体上的氧化-还原状态对催化剂性能的影响.结果表明,甲酸盐向碳酸盐的转化是反应的控制步...
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StartPage 1552
SubjectTerms 催化燃烧
原位红外
甲烷
钯
镍铝尖晶石
Title Pd/NiAl2O4催化剂上甲烷燃烧反应的红外光谱研究
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