Modifying the Substrate-Dependent Pd/Fe2O3 Catalyst-Support Synergism with ZnO Atomic Layer Deposition

Shultz-Johnson LR, Rahmani A, Frisch J, Hsieh TE, Hu L, Sosa J, Davy M, Xie S, Beazley MJ, Gao Z, Golvari P, Wang TH, Ong TG, Rudawski NG, Liu F, Banerjee P, Feng X, Bär M, Jurca T (2024)

Publication Type: Journal article

Publication year: 2024

Journal

ACS Applied Materials and Interfaces American Chemical Society

Book Volume: 16

Pages Range: 39387-39398

Journal Issue: 30

DOI: 10.1021/acsami.4c01528

Abstract

Low-loading Pd supported on Fe2O3 nanoparticles was synthesized. A common nanocatalyst system with previously reported synergistic enhancement of reactivity that is attributed to the electronic interactions between Pd and the Fe2O3 support. Fe2O3-selective precoalescence overcoating with ZnO atomic layer deposition (ALD), using Zn(CH2CH3)2 and H2O as precursors, dampens competitive hydrogenation reactivity at Fe2O3-based sites. The result is enhanced efficiency at the low-loading but high reactivity Pd sites. While this increases catalyst efficiency toward most aqueous redox reactions tested, it suppresses reactivity toward polyaromatic core substrates. X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) show minimal electronic impacts for the ZnO overcoat on the Pd particles, implying a predominantly physical site blocking effect as the reason for the modified reactivity. This serves as a proof-of-concept of not only stabilizing supported nanocatalysts but also altering reactivity with ultrathin ALD overcoats. The results point to a facile ALD route for selective enhancement of reactivity for low-loading Pd-based supported nanocatalysts.

Authors with CRIS profile

Marcus Bär

Involved external institutions

University of Central Florida (UCF) US United States (USA) (US) Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) DE Germany (DE) Institute of Chemistry Academia Sinica TW Taiwan (TW) University of Florida US United States (USA) (US)

How to cite

APA:

Shultz-Johnson, L.R., Rahmani, A., Frisch, J., Hsieh, T.E., Hu, L., Sosa, J.,... Jurca, T. (2024). Modifying the Substrate-Dependent Pd/Fe2O3 Catalyst-Support Synergism with ZnO Atomic Layer Deposition. ACS Applied Materials and Interfaces, 16(30), 39387-39398. https://doi.org/10.1021/acsami.4c01528

MLA:

Shultz-Johnson, Lorianne R., et al. "Modifying the Substrate-Dependent Pd/Fe2O3 Catalyst-Support Synergism with ZnO Atomic Layer Deposition." ACS Applied Materials and Interfaces 16.30 (2024): 39387-39398.

BibTeX: Download