Roadmap for Modeling RhPt/Pt(111) Catalytic Surfaces

PtRh alloys are used as versatile multipurpose catalysts for a number of industrial applications, including fertilizer production and ammonia slip catalysts for NO x abatement purposes. For the latter, ammonia is oxidized to nitrogen at intermediate temperatures. To optimize the PtRh-alloyed catalys...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physical chemistry. C 2018-11, Vol.122 (46), p.26430-26437
Main Authors: Zheng, Jian, Ivashenko, Oleksii, Fjellvåg, Helmer, Groot, Irene M. N, Sjåstad, Anja O
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:PtRh alloys are used as versatile multipurpose catalysts for a number of industrial applications, including fertilizer production and ammonia slip catalysts for NO x abatement purposes. For the latter, ammonia is oxidized to nitrogen at intermediate temperatures. To optimize the PtRh-alloyed catalysts and explain the role of Pt and Rh for future intermediate-temperature ammonia oxidation operando studies, we prepared a series of distinct RhPt model surfaces. We explore postannealing and high-temperature deposition as two routes for preparation of surface alloys and compare results with literature examples. Scanning tunneling microscopy and X-ray photoelectron spectroscopy provide detailed information on surface morphology and composition and demonstrate excellent temperature stability of RhPt/Pt(111) in the temperature range targeted for operando catalytic studies. A detailed roadmap summarizes preparation conditions to achieve a broad variety of surface structures.
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.8b08124