Surface Restructuring of Supported Nano-Ceria for Improving Sulfur Resistance

ACS Catalysis ◽  
2021 ◽  
pp. 7154-7159
Author(s):  
Beom-Sik Kim ◽  
Junemin Bae ◽  
Hojin Jeong ◽  
Chanyeong Choe ◽  
Hyunjoo Lee
Keyword(s):  
Sulfur Resistance ◽  
Surface Restructuring ◽  
Nano Ceria

Evolution of Metastable Structures in Bimetallic Catalysts from Microscopy and Machine-Learning Molecular Dynamics

2020 ◽  
Author(s):  
Jin Soo Lim ◽  
Jonathan Vandermause ◽  
Matthijs A. van Spronsen ◽  
Albert Musaelian ◽  
Christopher R. O’Connor ◽  
...  
Keyword(s):  
Machine Learning ◽  
Molecular Dynamics ◽  
Large Scale ◽  
Materials Science ◽  
Complete Characterization ◽  
Layer By Layer ◽  
Surface Restructuring ◽  
Metastable Structures ◽  
Mechanistic Investigation ◽  
Underlying Mechanisms

Restructuring of interface plays a crucial role in materials science and heterogeneous catalysis. Bimetallic systems, in particular, often adopt very different composition and morphology at surfaces compared to the bulk. For the first time, we reveal a detailed atomistic picture of the long-timescale restructuring of Pd deposited on Ag, using microscopy, spectroscopy, and novel simulation methods. Encapsulation of Pd by Ag always precedes layer-by-layer dissolution of Pd, resulting in significant Ag migration out of the surface and extensive vacancy pits. These metastable structures are of vital catalytic importance, as Ag-encapsulated Pd remains much more accessible to reactants than bulk-dissolved Pd. The underlying mechanisms are uncovered by performing fast and large-scale machine-learning molecular dynamics, followed by our newly developed method for complete characterization of atomic surface restructuring events. Our approach is broadly applicable to other multimetallic systems of interest and enables the previously impractical mechanistic investigation of restructuring dynamics.

Structure, Catalytic Oxidation Performance, and Sulfur Resistance of Mn-Based Catalysts Supported on Modified Mesoporous Al2O3

2010 ◽  
Vol 31 (1) ◽  
pp. 106-111
Author(s):  
Zhiqiang ZOU ◽  
Ming MENG ◽  
Yifu YU ◽  
Yaning XIE ◽  
Tiandou HU ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Sulfur Resistance ◽  
Oxidation Performance

H-Induced Surface Restructuring on Si(100): Formation of Higher Hydrides

1990 ◽  
Author(s):  
C. C. Cheng ◽  
Jr Yates ◽  
J. T.
Keyword(s):  
Surface Restructuring

Gd/Sm dopant-modified oxidation state and defect generation in nano-ceria

2014 ◽  
Vol 260 ◽  
pp. 21-29 ◽  
Author(s):  
S.A. Acharya ◽  
V.M. Gaikwad ◽  
S.W. D'Souza ◽  
S.R. Barman
Keyword(s):  
Oxidation State ◽  
Defect Generation ◽  
Nano Ceria

The surface restructuring of copper oxides with mixed oxidation-states and their efficient CO oxidation properties

2021 ◽  
Vol 289 ◽  
pp. 129378
Author(s):  
Wei Liu ◽  
Baoqin Wang ◽  
Chenchen Cui ◽  
Yiwen Zhang ◽  
Lixuan Wang ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Copper Oxides ◽  
Oxidation States ◽  
Surface Restructuring ◽  
Mixed Oxidation ◽  
Oxidation Properties

Highly efficient and enhanced sulfur resistance supported bimetallic single-atom palladium―cobalt catalysts for benzene oxidation

2020 ◽  
pp. 119844
Author(s):  
Zhiquan Hou ◽  
Lingyun Dai ◽  
Yuxi Liu ◽  
Jiguang Deng ◽  
Lin Jing ◽  
...  
Keyword(s):  
Cobalt Catalysts ◽  
Single Atom ◽  
Benzene Oxidation ◽  
Sulfur Resistance ◽  
Highly Efficient

Pd−W and Pd−Co Bimetallic Catalysts' Sulfur Resistance for Selective Hydrogenation

1997 ◽  
Vol 36 (7) ◽  
pp. 2543-2546 ◽  
Author(s):  
Pablo C. L'Argentièr ◽  
Nora S. Fígoli
Keyword(s):  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Sulfur Resistance

Influence of nano-ceria sol-gel coating on oxidation behavior of chromium at 1000 °C

2009 ◽  
Vol 16 (6) ◽  
pp. 80-85
Author(s):  
Hui-ming Jin ◽  
Xiao-wei Zhou ◽  
Lin-nan Zhang
Keyword(s):  
Oxidation Behavior ◽  
Sol Gel ◽  
Nano Ceria
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