Propyne Hydrogenation over a Pd/Cu(111) Single-Atom Alloy Studied using Ambient Pressure Infrared Spectroscopy

ACS Catalysis ◽  
2020 ◽  
Vol 10 (17) ◽  
pp. 9716-9724
Author(s):  
Mohammed K. Abdel-Rahman ◽  
Michael Trenary
Keyword(s):  
Infrared Spectroscopy ◽  
Ambient Pressure ◽  
Single Atom ◽  
Single Atom Alloy

scholarly journals Enhanced Stability of Pt-Cu Single-Atom Alloy Catalysts: In Situ Characterization of the Pt/Cu(111) Surface in an Ambient Pressure of CO

2018 ◽  
Vol 122 (8) ◽  
pp. 4488-4495 ◽  
Author(s):  
Juan Pablo Simonovis ◽  
Adrian Hunt ◽  
Robert M. Palomino ◽  
Sanjaya D. Senanayake ◽  
Iradwikanari Waluyo
Keyword(s):  
Ambient Pressure ◽  
Single Atom ◽  
In Situ Characterization ◽  
Alloy Catalysts ◽  
Enhanced Stability ◽  
Single Atom Alloy

scholarly journals Subtle and reversible interactions of ambient pressure H2 with Pt/Cu(111) single-atom alloy surfaces

2019 ◽  
Vol 679 ◽  
pp. 207-213 ◽  
Author(s):  
Juan Pablo Simonovis ◽  
Adrian Hunt ◽  
Sanjaya D. Senanayake ◽  
Iradwikanari Waluyo
Keyword(s):  
Ambient Pressure ◽  
Single Atom ◽  
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 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.

scholarly journals Tuning Pt-CeO2 interactions by high-temperature vapor-phase synthesis for improved reducibility of lattice oxygen

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Xavier Isidro Pereira-Hernández ◽  
Andrew DeLaRiva ◽  
Valery Muravev ◽  
Deepak Kunwar ◽  
Haifeng Xiong ◽  
...  
Keyword(s):  
High Temperature ◽  
Co Oxidation ◽  
Vapor Phase ◽  
Ambient Pressure ◽  
Lattice Oxygen ◽  
Single Atom ◽  
Stable Form ◽  
Phase Synthesis ◽  
Vapor Phase Synthesis ◽  
High Temperature Vapor

Abstract In this work, we compare the CO oxidation performance of Pt single atom catalysts (SACs) prepared via two methods: (1) conventional wet chemical synthesis (strong electrostatic adsorption–SEA) with calcination at 350 °C in air; and (2) high temperature vapor phase synthesis (atom trapping–AT) with calcination in air at 800 °C leading to ionic Pt being trapped on the CeO2 in a thermally stable form. As-synthesized, both SACs are inactive for low temperature (<150 °C) CO oxidation. After treatment in CO at 275 °C, both catalysts show enhanced reactivity. Despite similar Pt metal particle size, the AT catalyst is significantly more active, with onset of CO oxidation near room temperature. A combination of near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) and CO temperature-programmed reduction (CO-TPR) shows that the high reactivity at low temperatures can be related to the improved reducibility of lattice oxygen on the CeO2 support.

Sign in / Sign up

Export Citation Format

Share Document