Design of Prussian blue analogue-derived double-cone structure Ce–Fe catalysts and their enhanced performance for the selective catalytic reduction of NOx with NH3. (7th December 2020)

• Record Type: Journal Article
• Authors: Guo, Jie; Zhang, Guodong; Tang, Zhicheng; Zhang, Jiyi
• Is Part Of: New journal of chemistry. Volume 44:Number 48(2020)
• Page Start: 21244
• Page End: 21254
• Publication Date: 2020-12-07
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj04419a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Prussian blue (PB) and its analogues (PBA) with different structures and adjustable compositions have been recognized as promising materials for catalysis, energy storage, and biological applications. Abstract : Prussian blue (PB) and its analogues (PBA) with different structures and adjustable compositions have been recognized as promising materials for catalysis, energy storage, and biological applications. Herein, a simple surface anchoring strategy is proposed to achieve the uniform deposition of CeO2 nanocrystals on the double-cone structure surface of PBA (denoted as Ce@Ce–Fe catalyst) for the selective catalytic reduction of NO x with NH3 (NH3 -SCR). Compared with Ce–Fe and Ce@CeO2 –Fe2 O3, the Ce@Ce–Fe catalyst exhibited the best catalytic activity, widest working temperature window, and highest SO2 tolerance, implying its good application in the process of NH3 -SCR. Moreover, the catalysts were characterized systematically to elucidate their surface properties and morphological structure. Taking advantage of the excellent redox performance, unique morphology, mesoporous structure with large surface area and pore diameter, and greater acid content, the Ce@Ce–Fe catalyst exhibited a higher NO x performance. In addition, the Ce@Ce–Fe catalyst also exhibited significant resistance to H2 O and SO2 due to its higher content of Fe atoms, implying that Fe plays a critical role in this Ce–Fe based catalytic system. More importantly, the present study indicates that well-dispersed active components and unique architectures can effectively enhance the performance of catalysts.