Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 52, Issue 8, Pages 4802-4808Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.8b00267
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Funding
- National Key R&D Program of China [2016YFC0203900, 2016YFC0203901]
- Fundamental Research Funds for the Central Universities
- Research Funds of Renmin University of China [18XNLG09]
- National Natural Science Foundation of China [21577173, 51778619]
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One-pot synthesized Cu SSZ-13 catalyst treated with dilute HNO3 achieved superior activity and selectivity in the selective catalytic oxidation (SCO) of NH3 to nitrogen, in comparison with other zeolite-based catalysts and most of metal-oxide catalysts. Furthermore, the catalyst showed the similar or even higher catalytic activity than the partial noble-metal catalysts, and meanwhile its N-2 selectivity was superior to most noble-metal catalysts. The characterization results demonstrated that more Cu2+ ions existing in Cu SSZ-13 catalyst were advantageous to its NH3-SCO activity. The in situ DRIFTS results indicated that the reactivity of NH3 species adsorbed on Lewis and Bronsted acid sites over Cu SSZ-13 O H catalyst depended on the reaction temperature. The results of this study suggest the one-pot synthesized Cu SSZ-13 is a promising NH3-SCO catalyst for practical application, either mobile or stationary pollution sources.
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