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论文类型：期刊论文

发表时间：2019-07-15

发表刊物：APPLIED CATALYSIS B-ENVIRONMENTAL

收录刊物：SCIE、EI

卷号：249

页面范围：333-345

ISSN号：0926-3373

关键字：Potassium ions; Hybrid catalyst; NOx storage and reduction; Non-thermal plasma

摘要：CoMn-K was mechanically mixed with a Pd/Ba/Al2O3 catalyst to enhance its NOx storage and reduction properties. The Pd/Ba/Al2O3 and CoMn-K mixture showed a synergetic effect with respect to NOx storage capacity and improved NOx reduction ability. The addition of K+ ions promoted the catalytic performance by increasing NOx oxidation activity and therefore NOx storage via the creation of active surface oxygen species on the catalysts. The stored NOx reduction by H-2 was also improved, being ascribed to the fact that Pd was mainly present as Pd-0 due to the electronic interactions between Pd and K+ ions. NOx conversions and N-2 selectivity at low temperatures (80-200 degrees C) could be further enhanced by assistance of non-thermal plasma in rich phase.