Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Solid-solution alloying of immiscible Pt and Au boosts catalytic performance for H2O2 direct synthesis

Authors
Lee, Hong WooNam, HyobinHan, Geun-HoCho, Young-HoonYeo, Byung ChulKim, Min-CheolKim, DonghunLee, Kwan-YoungLee, Seung YongHan, Sang Soo
Issue Date
15-2월-2021
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Bimetallic catalyst; Nanoparticle; Immiscible elements; Solid-solution alloy; H2O2 direct synthesis
Citation
ACTA MATERIALIA, v.205
Indexed
SCIE
SCOPUS
Journal Title
ACTA MATERIALIA
Volume
205
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/49575
DOI
10.1016/j.actamat.2020.116563
ISSN
1359-6454
Abstract
Here, we propose the solid-solution alloy nanoparticles (NPs) composed of Pt and Au supported on TiO2 as an efficient catalyst for direct H2O2 synthesis, although Pt and Au are entirely immiscible in the bulk phases. Pt and Au atoms were homogeneously distributed in a wide composition range of Pt(x)Au(100-x)NPs (10 <= x <= 80) supported on TiO2. The most Au-rich Pt-10 Au-90 NPs/TiO2 exhibits the best catalytic performances, H2O2 selectivity (94.5 +/- 0.6%) and productivity (959 +/- 12 mmol(H2O2).g(metal)(-1).h(-1)), even under mild conditions (10 degrees C, 1 atm) and without halide-ion additives. Density functional theory calculations reveal that the introduction of inactive Au atoms strongly suppresses both O-O bond scission and OH hydrogenation, thereby enabling near unity selectivity. The Pt-Au catalyst is Pd-absent, which is noteworthy given previous efforts in direct H2O2 synthesis are mostly limited to prototypical Pd or Pd-based modifications. This work will stimulate active utilization of immiscible elemental combinations for the direct H2O2 synthesis catalyst development. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Lee, Kwan Young photo

Lee, Kwan Young
공과대학 (화공생명공학과)
Read more

Altmetrics

Total Views & Downloads

BROWSE