Nitrogen and Boron coordinated single-atom catalysts for Low-temperature CO/NO oxidations

2021 ◽  
Author(s):  
Yanan Tang ◽  
Weiguang Chen ◽  
Jin Lei Shi ◽  
Zhiwen Wang ◽  
Yingqi Cui ◽  
...  
Keyword(s):  
Low Temperature ◽  
Single Atom ◽  
Intrinsic Properties

In order to explore the intrinsic properties of single-atom (SA) catalysts, the different coordinated atoms (typically Bx and Ny, x + y =1 ~ 3) within graphene (BxNy-graphene) can be...

Tailoring the Local Environment of Platinum in Single‐Atom Pt1/CeO2 Catalysts for Robust Low‐Temperature CO Oxidation

2021 ◽  
Author(s):  
Dong Jiang ◽  
Yonggang Yao ◽  
Tangyuan Li ◽  
Gang Wan ◽  
Xavier Isidro Pereira-Hernández ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Local Environment ◽  
Single Atom ◽  
Low Temperature Co Oxidation

scholarly journals Low temperature activation of inert hexagonal boron nitride for metal deposition and single atom catalysis

2021 ◽  
Author(s):  
Yu Lei ◽  
Srimanta Pakhira ◽  
Kazunori Fujisawa ◽  
He Liu ◽  
Cynthia Guerrero-Bermea ◽  
...  
Keyword(s):  
Low Temperature ◽  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Metal Deposition ◽  
Single Atom ◽  
Temperature Activation

Methane electrochemical oxidation at low temperature on Rh single atom/NiO/V2O5 nanocomposite

2020 ◽  
Vol 603 ◽  
pp. 117746
Author(s):  
Maria Sarno ◽  
Eleonora Ponticorvo ◽  
Nicola Funicello ◽  
Salvatore De Pasquale
Keyword(s):  
Low Temperature ◽  
Electrochemical Oxidation ◽  
Single Atom

scholarly journals Low-Temperature Oxidation of Methanol to Formaldehyde on a Model Single-Atom Catalyst: Pd Atoms on Fe3O4(001)

ACS Catalysis ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 10977-10982 ◽  
Author(s):  
Matthew D. Marcinkowski ◽  
Simuck F. Yuk ◽  
Nassar Doudin ◽  
R. Scott Smith ◽  
Manh-Thuong Nguyen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Single Atom ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Of Methanol

scholarly journals Elucidation of the Active Sites in Single-Atom Pd1/CeO2 Catalysts for Low-Temperature CO Oxidation

ACS Catalysis ◽  
2020 ◽  
Vol 10 (19) ◽  
pp. 11356-11364 ◽  
Author(s):  
Dong Jiang ◽  
Gang Wan ◽  
Carlos E. García-Vargas ◽  
Linze Li ◽  
Xavier Isidro Pereira-Hernández ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Active Sites ◽  
Single Atom ◽  
Low Temperature Co Oxidation

scholarly journals A single iron site confined in a graphene matrix for the catalytic oxidation of benzene at room temperature

2015 ◽  
Vol 1 (11) ◽  
pp. e1500462 ◽  
Author(s):  
Dehui Deng ◽  
Xiaoqi Chen ◽  
Liang Yu ◽  
Xing Wu ◽  
Qingfei Liu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Low Temperature ◽  
Catalytic Oxidation ◽  
Room Temperature ◽  
Single Atom ◽  
Intermediate Structure ◽  
Oxidation Reactions ◽  
Transmission Electron ◽  
Oxidation Of Benzene

Coordinatively unsaturated (CUS) iron sites are highly active in catalytic oxidation reactions; however, maintaining the CUS structure of iron during heterogeneous catalytic reactions is a great challenge. Here, we report a strategy to stabilize single-atom CUS iron sites by embedding highly dispersed FeN4 centers in the graphene matrix. The atomic structure of FeN4 centers in graphene was revealed for the first time by combining high-resolution transmission electron microscopy/high-angle annular dark-field scanning transmission electron microscopy with low-temperature scanning tunneling microscopy. These confined single-atom iron sites exhibit high performance in the direct catalytic oxidation of benzene to phenol at room temperature, with a conversion of 23.4% and a yield of 18.7%, and can even proceed efficiently at 0°C with a phenol yield of 8.3% after 24 hours. Both experimental measurements and density functional theory calculations indicate that the formation of the Fe═O intermediate structure is a key step to promoting the conversion of benzene to phenol. These findings could pave the way toward highly efficient nonprecious catalysts for low-temperature oxidation reactions in heterogeneous catalysis and electrocatalysis.

Activation of surface lattice oxygen in single-atom Pt/CeO2 for low-temperature CO oxidation

Science ◽  
2017 ◽  
Vol 358 (6369) ◽  
pp. 1419-1423 ◽  
Author(s):  
Lei Nie ◽  
Donghai Mei ◽  
Haifeng Xiong ◽  
Bo Peng ◽  
Zhibo Ren ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Active Sites ◽  
Fuel Efficiency ◽  
Steam Treatment ◽  
Single Atom ◽  
Oxidation Activity ◽  
Formidable Challenge ◽  
Low Temperature Co Oxidation ◽  
Exhaust Treatment

To improve fuel efficiency, advanced combustion engines are being designed to minimize the amount of heat wasted in the exhaust. Hence, future generations of catalysts must perform at temperatures that are 100°C lower than current exhaust-treatment catalysts. Achieving low-temperature activity, while surviving the harsh conditions encountered at high engine loads, remains a formidable challenge. In this study, we demonstrate how atomically dispersed ionic platinum (Pt2+) on ceria (CeO2), which is already thermally stable, can be activated via steam treatment (at 750°C) to simultaneously achieve the goals of low-temperature carbon monoxide (CO) oxidation activity while providing outstanding hydrothermal stability. A new type of active site is created on CeO2 in the vicinity of Pt2+, which provides the improved reactivity. These active sites are stable up to 800°C in oxidizing environments.

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