Guaiacol Hydrodeoxygenation over Iron–Ceria Catalysts with Platinum Single-Atom Alloy Clusters as a Promoter

ACS Catalysis ◽  
2021 ◽  
pp. 12794-12814
Author(s):  
Congcong Li ◽  
Yoshinao Nakagawa ◽  
Mizuho Yabushita ◽  
Akira Nakayama ◽  
Keiichi Tomishige
Keyword(s):  
Single Atom ◽  
Ceria Catalysts ◽  
Alloy Clusters ◽  
Single Atom Alloy

Selective Hydrogenation of Acrolein on a Pd/Ag(111) Single-Atom Alloy Surface

2020 ◽  
Vol 124 (44) ◽  
pp. 24271-24278
Author(s):  
Mark Muir ◽  
David L. Molina ◽  
Arephin Islam ◽  
Mohammed K. Abdel-Rahman ◽  
Michael Trenary
Keyword(s):  
Selective Hydrogenation ◽  
Single Atom ◽  
Alloy Surface ◽  
Single Atom Alloy

scholarly journals Free-atom-like d states in single-atom alloy catalysts

2018 ◽  
Vol 10 (10) ◽  
pp. 1008-1015 ◽  
Author(s):  
M. T. Greiner ◽  
T. E. Jones ◽  
S. Beeg ◽  
L. Zwiener ◽  
M. Scherzer ◽  
...  
Keyword(s):  
Free Atom ◽  
Single Atom ◽  
Alloy Catalysts ◽  
Single Atom Alloy

scholarly journals Identification of Ru/Ceria Among Single Atom Ceria Catalysts as a Stable and Superior Material for Abatement of Diesel and Gasoline Engine Pollutants

2020 ◽  
Author(s):  
Konstantin Khivantsev ◽  
Nicholas R. Jaegers ◽  
Libor Kovarik ◽  
Jinshu Tian ◽  
Xavier Isidro Pereira Hernandez ◽  
...  
Keyword(s):  
Gasoline Engine ◽  
No Oxidation ◽  
Oxidation Catalyst ◽  
Single Atom ◽  
Hydrothermal Aging ◽  
Gasoline Engines ◽  
Nox Adsorption ◽  
Ceria Catalysts ◽  
Better Than ◽  
Three Way Catalysis

Atomically dispersed transition metals (Ru, Pd and Pt) have been prepared on CeO<sub>2</sub> and evaluated for NOx/CO abatement applications for diesel and gasoline engines, such as low temperature passive NOx adsorption (PNA), NO and CO oxidation, and three-way-catalysis (TWC). 0.5 wt% Ru/CeO<sub>2</sub> catalyst (Ru is ~27 and ~7 times cheaper than Rh and Pd) shows remarkable PNA performance, better than 1 wt% Pd/Zeolite: it achieves 100% removal of NOx during vehicle cold start. FTIR measurements reveal the formation of stable Ru(NO) complexes as well spill-over of NO to CeO<sub>2</sub> surface via the Ru-O-Ce shuttle, explaining high NO storage. Notably, Ru/ceria survives hydrothermal aging at 750 ⁰C without loss of PNA capacity. It is also a robust NO oxidation catalyst, considerably more active than Pt or Pd/CeO<sub>2</sub>. Expanding the repertoire of Ru/CeO<sub>2</sub> catalytic applications, we further find 0.1 and 0.5 wt% Ru/CeO<sub>2</sub> to be excellent TWC catalysts, rivaling best single-atom Rh supported materials. Our study pushes the frontier of precious metal atom economy for environmental catalysis from uber expensive Rh/Pd/Pt to more sustainable cheaper Ru and highlights the utility of single-atom catalysts for industrially relevant applications.

scholarly journals Platinum–copper single atom alloy catalysts with high performance towards glycerol hydrogenolysis

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Xi Zhang ◽  
Guoqing Cui ◽  
Haisong Feng ◽  
Lifang Chen ◽  
Hui Wang ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Reaction Pathway ◽  
Theoretical Calculations ◽  
Experimental Studies ◽  
Value Added ◽  
Catalytic Performance ◽  
Single Atom ◽  
Glycerol Hydrogenolysis ◽  
Single Atom Alloy

AbstractSelective hydrogenolysis of biomass-derived glycerol to propanediol is an important reaction to produce high value-added chemicals but remains a big challenge. Herein we report a PtCu single atom alloy (SAA) catalyst with single Pt atom dispersed on Cu nanoclusters, which exhibits dramatically boosted catalytic performance (yield: 98.8%) towards glycerol hydrogenolysis to 1,2-propanediol. Remarkably, the turnover frequency reaches up to 2.6 × 103 molglycerol·molPtCu–SAA−1·h−1, which is to our knowledge the largest value among reported heterogeneous metal catalysts. Both in situ experimental studies and theoretical calculations verify interface sites of PtCu–SAA serve as intrinsic active sites, in which the single Pt atom facilitates the breakage of central C–H bond whilst the terminal C–O bond undergoes dissociation adsorption on adjacent Cu atom. This interfacial synergistic catalysis based on PtCu–SAA changes the reaction pathway with a decreased activation energy, which can be extended to other noble metal alloy systems.

Kinetic Study of the Hydrogenation of Unsaturated Aldehydes Promoted by CuPtx/SBA-15 Single-Atom Alloy (SAA) Catalysts

ACS Catalysis ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 3431-3443 ◽  
Author(s):  
Yueqiang Cao ◽  
Jonathan Guerrero-Sańchez ◽  
Ilkeun Lee ◽  
Xinggui Zhou ◽  
Noboru Takeuchi ◽  
...  
Keyword(s):  
Kinetic Study ◽  
Single Atom ◽  
Unsaturated Aldehydes ◽  
Single Atom Alloy

scholarly journals On the behaviour of structure-sensitive reactions on single atom and dilute alloy surfaces

2020 ◽  
Vol 10 (17) ◽  
pp. 5815-5828 ◽  
Author(s):  
Konstantinos G. Papanikolaou ◽  
Michail Stamatakis
Keyword(s):  
Structure Sensitivity ◽  
Single Atom ◽  
Structure Sensitive ◽  
Dilute Alloy ◽  
Structure Sensitive Reactions ◽  
Single Atom Alloy

Typically structure sensitive dissociation reactions exhibit reduced structure-sensitivity when taking place over low-index single atom alloy surfaces.

scholarly journals Catalytic activity, thermal stability and structural evolution of PdCu single-atom alloy catalysts: the effects of size and morphology

RSC Advances ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 62-71
Author(s):  
Qing Liu ◽  
Xiaoxu Wang ◽  
Lu Li ◽  
Keke Song ◽  
Yanzhou Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Catalytic Activity ◽  
Catalytic Properties ◽  
Structural Evolution ◽  
Md Simulations ◽  
Single Atom ◽  
Structure Evolution ◽  
Size And Morphology ◽  
Alloy Catalysts ◽  
Single Atom Alloy

Catalytic properties and structure evolution of a PdCu nanoalloy with a novel crown-jewel structure are explored using DFT calculations and MD simulations.

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