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The direct decomposition of NO into N2 and O2 over copper doped Ba3Y4O9
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020-03-10 , DOI: 10.1039/d0cy00194e Siman Fang 1, 2, 3, 4 , Atsushi Takagaki 2, 3, 4, 5 , Motonori Watanabe 2, 3, 4, 6 , Tatsumi Ishihara 1, 2, 3, 4, 5
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020-03-10 , DOI: 10.1039/d0cy00194e Siman Fang 1, 2, 3, 4 , Atsushi Takagaki 2, 3, 4, 5 , Motonori Watanabe 2, 3, 4, 6 , Tatsumi Ishihara 1, 2, 3, 4, 5
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The direct decomposition of nitrogen oxides (NOX) is an ideal way to remove NOX pollution created by chemical industries and automobiles. Ba3Y4O9 is a promising candidate for the NOX direct decomposition reaction, however, its catalytic activity is not high enough and the stability is insufficient. Here, NO decomposition activity on several metal ion doped Ba3Y4O9 catalysts is reported and it is found that Cu is the most effective for increasing the activity. With 10% Cu doping, the catalytic activity and the stability were improved simultaneously. Temperature programmed desorption (TPD) results indicate that doping with Cu increased the amount of surface oxygen vacancies and mobility of the lattice oxygen resulting in an increase of NO adsorption and the promotion of the decomposition of NOX intermediate species. In situ FT-IR spectra prove that Cu doping weakened the association of NO3− species, thus promoting the decomposition of NO3− species at low temperatures, which resulted in high catalytic activity for NOX decomposition. These results indicate that introducing Cu into the Ba3Y4O9 system is an effective way to achieve high activity and a stable catalyst for the direct decomposition of NOX.
中文翻译：
掺杂铜的Ba3Y4O9将NO直接分解成N2和O2
氮氧化物（NO X）的直接分解是去除化学工业和汽车产生的NO X污染的理想方法。Ba 3 Y 4 O 9是用于NO X直接分解反应的有希望的候选物，但是，其催化活性不够高并且稳定性不足。在此，NO对几种掺杂金属离子的Ba 3 Y 4 O 9的分解活性据报道有催化剂，并且发现Cu对于增加活性最有效。掺杂10％的Cu可以同时提高催化活性和稳定性。程序升温解吸（TPD）结果表明，掺杂Cu会增加表面氧空位的数量和晶格氧的迁移率，从而导致NO吸附增加并促进NO X中间物种的分解。原位FT-IR光谱证明铜掺杂减弱NO的关联3 -物种，从而促进NO的分解3 -在低温下物种，这导致了对NO的高催化活性X分解。这些结果表明，将Cu引入Ba 3 Y 4 O 9体系是实现高活性的有效途径，并且是稳定的NO X直接分解催化剂。
更新日期：2020-03-10
中文翻译：
掺杂铜的Ba3Y4O9将NO直接分解成N2和O2
氮氧化物（NO X）的直接分解是去除化学工业和汽车产生的NO X污染的理想方法。Ba 3 Y 4 O 9是用于NO X直接分解反应的有希望的候选物，但是，其催化活性不够高并且稳定性不足。在此，NO对几种掺杂金属离子的Ba 3 Y 4 O 9的分解活性据报道有催化剂，并且发现Cu对于增加活性最有效。掺杂10％的Cu可以同时提高催化活性和稳定性。程序升温解吸（TPD）结果表明，掺杂Cu会增加表面氧空位的数量和晶格氧的迁移率，从而导致NO吸附增加并促进NO X中间物种的分解。原位FT-IR光谱证明铜掺杂减弱NO的关联3 -物种，从而促进NO的分解3 -在低温下物种，这导致了对NO的高催化活性X分解。这些结果表明，将Cu引入Ba 3 Y 4 O 9体系是实现高活性的有效途径，并且是稳定的NO X直接分解催化剂。
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