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Author:

Xie, Shaohua (Xie, Shaohua.) | Wang, Zhiwei (Wang, Zhiwei.) | Tan, Wei (Tan, Wei.) | Zhu, Yatong (Zhu, Yatong.) | Collier, Samantha (Collier, Samantha.) | Ma, Lu (Ma, Lu.) | Ehrlich, Steven N. (Ehrlich, Steven N..) | Xu, Peng (Xu, Peng.) | Yan, Yong (Yan, Yong.) | Xu, Tao (Xu, Tao.) | Deng, Jiguang (Deng, Jiguang.) | Liu, Fudong (Liu, Fudong.)

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EI Scopus SCIE PubMed

Abstract:

Precious metal catalysts with superior low-temperature activity and excellent thermal stability are highly needed in environmental catalysis field. In this work, a novel two-step incipient wetness impregnation (T-IWI) method was developed for the fabrication of a unique and highly stable CeO2/Al2O3 support (CA-T). Pd anchored on CA-T exhibited a much higher low-temperature catalytic activity and superior thermal stability in carbon monoxide (CO) and hydrocarbon (HC) oxidations, compared to Pd anchored on conventional CeO2/Al2O3 (CA), which was prepared by a one-step IWI method. After aging treatment at 800 degrees C, the CO oxidation rate on Pd/CA-T (1.69 mmol/(gPd s)) at 120 degrees C was 4.1 and 84.5 times of those on Pd/CA (0.41 mmol/(gPd s)) and Pd/Al2O3 (0.02 mmol/(gPd s)), respectively. It was revealed that the CA-T support with well-controlled small CeO2 particles (ca. 12 nm) possessed abundant defects for Pd anchoring, which created rich Pd-CeO2 interfaces with strengthened interaction between Pd and CeO2 where oxygen could be efficiently activated. This resulted in the significantly improved oxidation activity and thermal stability of Pd/CA-T catalysts. The T-IWI method developed herein can be applied as a universal approach to prepare highly stable metal oxide-alumina-based supports, which have broad application in environmental catalyst design, especially for automobile exhaust aftertreatment.

Keyword:

Author Community:

  • [ 1 ] [Xie, Shaohua]Univ Cent Florida, NanoSci Technol Ctr NSTC, Dept Civil Environm & Construct Engn, Catalysis Cluster Renewable Energy & Chem Transfo, Orlando, FL 32816 USA
  • [ 2 ] [Tan, Wei]Univ Cent Florida, NanoSci Technol Ctr NSTC, Dept Civil Environm & Construct Engn, Catalysis Cluster Renewable Energy & Chem Transfo, Orlando, FL 32816 USA
  • [ 3 ] [Collier, Samantha]Univ Cent Florida, NanoSci Technol Ctr NSTC, Dept Civil Environm & Construct Engn, Catalysis Cluster Renewable Energy & Chem Transfo, Orlando, FL 32816 USA
  • [ 4 ] [Liu, Fudong]Univ Cent Florida, NanoSci Technol Ctr NSTC, Dept Civil Environm & Construct Engn, Catalysis Cluster Renewable Energy & Chem Transfo, Orlando, FL 32816 USA
  • [ 5 ] [Wang, Zhiwei]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Deng, Jiguang]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 7 ] [Tan, Wei]Nanjing Univ, Sch Chem & Chem Engn, Jiangsu Key Lab Vehicle Emiss Control, Nanjing 210093, Peoples R China
  • [ 8 ] [Zhu, Yatong]Southeast Univ, SEU FEI Nanopico Ctr, Key Lab MEMS, Minist Educ, Nanjing 210096, Peoples R China
  • [ 9 ] [Xu, Tao]Southeast Univ, SEU FEI Nanopico Ctr, Key Lab MEMS, Minist Educ, Nanjing 210096, Peoples R China
  • [ 10 ] [Ma, Lu]Brookhaven Natl Lab, Natl Synchrotron Light Source NSLS 2 2, Upton, NY 11973 USA
  • [ 11 ] [Ehrlich, Steven N.]Brookhaven Natl Lab, Natl Synchrotron Light Source NSLS 2 2, Upton, NY 11973 USA
  • [ 12 ] [Xu, Peng]Natl Ctr Nanosci & Technol, CAS Key Lab Standardizat & Measurement Nanotechno, Beijing 100190, Peoples R China
  • [ 13 ] [Yan, Yong]Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore

Reprint Author's Address:

  • [Liu, Fudong]Univ Cent Florida, NanoSci Technol Ctr NSTC, Dept Civil Environm & Construct Engn, Catalysis Cluster Renewable Energy & Chem Transfo, Orlando, FL 32816 USA

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Source :

ENVIRONMENTAL SCIENCE & TECHNOLOGY

ISSN: 0013-936X

Year: 2021

Issue: 11

Volume: 55

Page: 7624-7633

1 1 . 4 0 0

JCR@2022

ESI Discipline: ENVIRONMENT/ECOLOGY;

ESI HC Threshold:94

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 1

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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