Departmental Papers (CBE)

Document Type

Technical Report

Date of this Version

2015

Publication Source

Nature Communications

Volume

6

DOI

10.1038/ncomms9120

Abstract

Metal particles supported on oxide surfaces are used as catalysts for a wide variety of processes in the chemical and energy conversion industries. For catalytic spplications, metal particles are generally formed on an oxide support by physical or chemical deposition, or less commonly by exsolution from it. Although fundamentally different, both methods might be assumed to produce morphologically and functionally similar particles. Here we show that unlike nickel particles deposited on perovskite oxides, exsolved analogues are socketed into the parent perovskite, leading to enhanced stability and a significant decrease in the propensity for hydrocarbon coking, indicative of a stronger metal-oxide interface. In addition, we reveal key surface effects and defect interactions critical for future design of exsolution-based perovskite materials for catalytic and other functionalities. This study provides a new dimenstion for tailoring particle-substrate interactions in the context of increasing interest for emergent interfactial phenomena.

Copyright/Permission Statement

This article is published under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

 

Date Posted: 01 December 2017

This document has been peer reviewed.