Comparison between a Water-Based and a Solvent-Based Impregnation Method towards Dispersed CuO/SBA-15 Catalysts: Texture, Structure and Catalytic Performance in Automotive Exhaust Gas Abatement

作者：Xin Qi^*; Glisenti Antonella; Philippopoulos Constantine; Poulakis Evangelos; Mertens Myrjam; Nyalosaso Jeff L; Meynen Vera; Cool Pegie

来源：Catalysts, 2016, 6(10): 164.

DOI：10.3390/catal6100164

• copper
• ammonia based impregnation
• molecular designed dispersion
• three-way catalyst

Supported copper oxide nanoparticles are a potential candidate for replacing the rare and expensive precious metals within the automotive three-way catalyst. However, a well-designed dispersion method is necessary to allow a stable high loading of active material, compensating its lower intrinsic activity and stability. In this work, a CuO-loaded SBA-15 catalyst has been manufactured by two methods. The ammonia-driven deposition precipitation (ADP) and the molecular designed dispersion (MDD) methods are both considered as efficient deposition methods to provide well-dispersed copper oxide-based catalysts. Their morphology, copper dispersion and the chemical state of copper were characterized and compared. Due to the differences in the synthesis approach, a difference in the obtained copper oxide phases has been observed, leading to a distinct behavior in the catalytic performance. The structure-activity correlation of both catalysts has also been revealed for automotive exhaust gas abatement. Results demonstrate that various copper species can be formed depending on the precursor-support interaction, affecting selectivity and conversion during the catalytic reaction.

• 出版日期2016-10