Highly Stable Pt-Co Bimetallic Catalysts Prepared by Atomic Layer Deposition for Selective Hydrogenation of Cinnamaldehyde

Abstract

Pt-Co bimetallic catalysts were deposited on γ-Al2O3 nanoparticles by atomic layer deposition (ALD) and were used for selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL). High resolution transmission electron microscopy, hydrogen temperature-programmed reduction, X-ray diffraction, and X-ray photoelectron spectroscopy were used to identify the strong interaction between Pt and Co. The obtained catalysts with an optimal Pt/Co ratio achieved a COL selectivity of 81.2% with a CAL conversion of 95.2% under mild conditions (i.e., 10 bar H2 and 80 °C). During the CAL hydrogenation, the addition of Co on Pt significantly improved the activity and selectivity due to the synergetic effects of Pt-Co bimetallic catalysts, resulted from the transfer of electrons from Co to Pt, which can stabilize the carbonyl groups. The obtained Pt-Co bimetallic catalysts also showed excellent stability due to the strong interaction between the metal nanoparticles and the alumina support. Negligible losses in the activity and selectivity were observed during the recycling experiments, showing the potential for practical applications.

Department(s)

Chemical and Biochemical Engineering

Comments

National Science Foundation, Grant NSF 1803812

Keywords and Phrases

ALD; Pt-Co bimetallic catalysts; selective hydrogenation; stability

International Standard Serial Number (ISSN)

1361-6528; 0957-4484

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 IOP Publishing, All rights reserved.

Publication Date

21 May 2022

PubMed ID

35168219

Link to Full Text

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