Subnanometric Pt on Cu Nanoparticles Confined in Y-zeolite: Highly-efficient Catalysts for Selective Catalytic Reduction of NOx by CO

TY - JOUR

T1 - Subnanometric Pt on Cu Nanoparticles Confined in Y-zeolite

T2 - Highly-efficient Catalysts for Selective Catalytic Reduction of NOx by CO

AU - Li, Liang

AU - Liu, Shaomian

AU - Jiang, Ruihuan

AU - Ji, Yongjun

AU - Li, Huifang

AU - Guo, Xiangfeng

AU - Jia, Lihua

AU - Zhong, Ziyi

AU - Su, Fabing

N1 - Publisher Copyright: © 2020 Wiley-VCH GmbH Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/3/19

Y1 - 2021/3/19

N2 - CO selective catalytic reduction (CO-SCR), a promising technology for simultaneous removal of harmful CO and NO in exhaust gases, has attracted much attention in recent years. Pt-based catalysts have been demonstrated to be effective for this reaction. However, it remains a big challenge to achieve a high low-temperature activity at a low Pt loading. Here we report a new catalyst consisting of subnanometric Pt on Cu nanoparticles confined in the NaOH-modified Y-zeolite (Pt−Cu@M−Y). This catalyst possesses enhanced catalytic performance in CO-SCR at an extremely low Pt content of 0.04 wt %, achieving full NO conversion at 250 °C. The Pt−Cu@M−Y catalyst was synthesized using a simple impregnation method followed by a hydrogen reduction. Transmission electron microscopy study revealed that Pt−Cu@M−Y with subnanometric Pt on Cu nanoparticle of ∼5 nm was highly dispersed in M−Y. The superior catalytic property of Pt−Cu@M−Y is attributed to the synergistic catalysis of Pt and Cu, in which subnanometric Pt species contributes to the strong adsorption of NO, while the dissociation of NO and the migration of dissociated O atoms are significantly boosted on the newly generated interfaces between Cu nanoparticles and the formed surface CuOx species. This work develops an effective method for synthesizing bimetallic nanoparticles confined in zeolite and demonstrates their superior catalytic performance in the catalytic reduction of NOx by CO.

AB - CO selective catalytic reduction (CO-SCR), a promising technology for simultaneous removal of harmful CO and NO in exhaust gases, has attracted much attention in recent years. Pt-based catalysts have been demonstrated to be effective for this reaction. However, it remains a big challenge to achieve a high low-temperature activity at a low Pt loading. Here we report a new catalyst consisting of subnanometric Pt on Cu nanoparticles confined in the NaOH-modified Y-zeolite (Pt−Cu@M−Y). This catalyst possesses enhanced catalytic performance in CO-SCR at an extremely low Pt content of 0.04 wt %, achieving full NO conversion at 250 °C. The Pt−Cu@M−Y catalyst was synthesized using a simple impregnation method followed by a hydrogen reduction. Transmission electron microscopy study revealed that Pt−Cu@M−Y with subnanometric Pt on Cu nanoparticle of ∼5 nm was highly dispersed in M−Y. The superior catalytic property of Pt−Cu@M−Y is attributed to the synergistic catalysis of Pt and Cu, in which subnanometric Pt species contributes to the strong adsorption of NO, while the dissociation of NO and the migration of dissociated O atoms are significantly boosted on the newly generated interfaces between Cu nanoparticles and the formed surface CuOx species. This work develops an effective method for synthesizing bimetallic nanoparticles confined in zeolite and demonstrates their superior catalytic performance in the catalytic reduction of NOx by CO.

KW - bimetallic nanoparticles

KW - CO+NO reaction

KW - confinement effects

KW - Pt-based catalysts

KW - zeolite

UR - http://www.scopus.com/inward/record.url?scp=85100341696&partnerID=8YFLogxK

U2 - 10.1002/cctc.202001774

DO - 10.1002/cctc.202001774

M3 - 文章

AN - SCOPUS:85100341696

SN - 1867-3880

VL - 13

SP - 1568

EP - 1577

JO - ChemCatChem

JF - ChemCatChem

IS - 6

ER -