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Title: Role of 2D and 3D defects on the reduction of LaNiO3 nanoparticles for catalysis

Journal Article · · Scientific Reports
 [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [2];  [1]
  1. Tel Aviv Univ., Ramat Aviv (Israel)
  2. Univ. of Manchester (United Kingdom)
  3. Northwestern Univ., Evanston, IL (United States)
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Solid phase crystallization offers an attractive route to synthesize Ni nanoparticles on a La2O3 support. These materials have shown great promise as catalysts for methane oxidation and similar reactions. Synthesis is achieved by the reduction of a LaNiO3 (LNO) precursor at high temperatures, but the reduction pathway can follow a variety of routes. Optimization of catalytic properties such as the long-term stability has been held back by a lack of understanding of the factors impacting the reduction pathway, and its strong influence on the structure of the resulting Ni/La2O3 catalyst. Here we show the first evidence of the importance of extended structural defects in the LNO precursor material (2D stacking faults and 3D inclusions) for determining the reaction pathway and therefore the properties of the final catalyst. Here we compare the crystallization of LNO nanoparticles via two different pathways using in-situ STEM, in-situ synchrotron XRD, and DFT electronic structure calculations. Control of extended defects is shown to be a key microstructure component for improving catalyst lifetimes.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE
OSTI ID:
1601884
Journal Information:
Scientific Reports, Vol. 7, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Cited By (4)

Expanding possibilities for solid-phase crystallization by exsolving tunable Pd–NiO core–shell nanostructures journal January 2018
Alloy, Janus and core-shell nanoparticles: Numerical modeling of their nucleation and growth in physical synthesis text January 2019
Alloy, Janus and core–shell nanoparticles: numerical modeling of their nucleation and growth in physical synthesis journal January 2019
Effect of Fe and Mn Substitution in LaNiO3 on Exsolution, Activity, and Stability for Methane Dry Reforming journal December 2019

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