Unlocking the Potential of Nanoparticles Composed of Immiscible Elements for Direct H2O2 Synthesis

Title
Unlocking the Potential of Nanoparticles Composed of Immiscible Elements for Direct H2O2 Synthesis
Authors
안재평이승용조소혜한상수김동훈여병철남효빈조영훈이관영
Keywords
bimetallic catalysts; metal nanoparticles; immiscible elements; Rh-Ag; Pt-Au; hydrogen peroxide direct synthesis; interfacial reactions; DFT calculations
Issue Date
2019-08
Publisher
ACS catalysis
Citation
VOL 9-8711
Abstract
Today, multimetallic nanoparticles (NPs) are extensively studied to search for high-performance catalysts. Unfortunately, a huge material space of NPs composed of immiscible elements has been generally disregarded for catalyst development due to the inherent difficulty of alloy synthesis. Herein, for the direct synthesis of hydrogen peroxide (H2O2), we demonstrate that NPs of immiscible elemental combinations of Rh– Ag, Rh– Au, Pt– Au, and Ir– Ag can efficiently produce H2O2, despite the negligible activities of Rh, Pt, Ir, Ag, and Au alone. In particular, we show that two catalysts, Rh13Ag87 and Pt28Au72 NPs, can outperform prototypic Pd NPs. Rh13Ag87 NPs, owing to their high content of the less-expensive element Ag, exhibit a 7.3-fold enhancement in cost-normalized productivity compared to Pd and, thus, may serve as an economical option. The other catalyst of Pt28Au72 NPs exhibits a productivity of 300 mmol gcat– 1 h– 1 and a 15-fold increase over that of Pd under isoconversion conditions. The observed remarkable productivities of these NPs are a result of the synergy between the two elemental domains at the interface. The present study suggests that the hitherto underutilized space of immiscible elemental combinations should be more actively searched for the development of improved catalyst materials.
URI
http://pubs.kist.re.kr/handle/201004/69843
ISSN
2155-5435
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

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

BROWSE