Promotion of Pd nanoparticles by Fe and formation of a Pd3Fe intermetallic alloy for propane dehydrogenation
Journal Article
·
· Catalysis Today
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
- Purdue Univ., West Lafayette, IN (United States). Davidson School of Chemical Engineering
- Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division; Purdue Univ., West Lafayette, IN (United States). Davidson School of Chemical Engineering
In this study, silica supported Pd (~2 nm), Pd3Fe (~2 nm) and Pd3Fe_large (~12 nm) catalysts were synthesized and tested for propane dehydrogenation at 510 °C. At the 10% conversion, Pd and Pd3Fe catalysts exhibited propylene selectivity of 45% and 94%, respectively. Moreover, the latter showed a turnover rate (TOR) of 0.2 s-1, which is five times higher than that of the Pd catalyst (0.04 s-1). Pd K edge XAS, XRD, and CO adsorbed IR were used to characterize the geometric structure of the catalysts. By combined comparison of XRD and XAS spectra of Pd3Fe and Pd3Fe_large catalysts, we successfully identified the crystalline phase in the 2 nm Pd3Fe catalyst. The CO adsorbed IR suggests that the formation of Pd3Fe breaks the ensemble of Pd, which is responsible for the increase of selectivity. The Pd L edge XAS was used to characterize the electronic structure of the catalysts. The Pd3Fe catalyst exhibits an increase of the edge energy compared with the Pd catalyst, which indicates the change of d-band structure in the bimetallic catalyst. The change in the electronic structure is likely the reason for the increase in TOR.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1650346
- Alternate ID(s):
- OSTI ID: 1874719
- Journal Information:
- Catalysis Today, Journal Name: Catalysis Today Vol. 323; ISSN 0920-5861
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Intermetallic Compounds as an Alternative to Single‐atom Alloy Catalysts: Geometric and Electronic Structures from Advanced X‐ray Spectroscopies and Computational Studies
|
journal | January 2020 |
Two-dimensional transition metal carbides as supports for tuning the chemistry of catalytic nanoparticles
|
journal | December 2018 |
Similar Records
Structural evolution of an intermetallic Pd–Zn catalyst selective for propane dehydrogenation
Structure and reactivity of Pt–In intermetallic alloy nanoparticles: Highly selective catalysts for ethane dehydrogenation
Sulfur Tolerant Subnanometer Fe/Alumina Catalysts for Propane Dehydrogenation
Journal Article
·
Fri Mar 20 00:00:00 EDT 2015
· Physical Chemistry Chemical Physics. PCCP
·
OSTI ID:1210837
Structure and reactivity of Pt–In intermetallic alloy nanoparticles: Highly selective catalysts for ethane dehydrogenation
Journal Article
·
Sat Apr 15 00:00:00 EDT 2017
· Catalysis Today
·
OSTI ID:1462709
Sulfur Tolerant Subnanometer Fe/Alumina Catalysts for Propane Dehydrogenation
Journal Article
·
Fri Sep 17 00:00:00 EDT 2021
· ACS Applied Nano Materials
·
OSTI ID:1831624