scholarly journals Pyrrolidone Modifying Gold Nanocatalysts for Enhanced Catalytic Activities in Aerobic Oxidation of Alcohols and Carbon Monoxide

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Yingji Song ◽  
Xuefeng Chu ◽  
Yingzi Lin ◽  
Xiaotian Yang
Keyword(s):  
Carbon Monoxide ◽  
Molecular Oxygen ◽  
Aerobic Oxidation ◽  
Reaction System ◽  
Metal Nanoparticle ◽  
Au Nanoparticle ◽  
Oxidation Reactions ◽  
Simple Strategy ◽  
Oxidation Of Alcohols ◽  
Xps Study

Enhancing the catalytic activity of supported metal nanoparticle is a great demand but extremely challenging to make. We reported a simple strategy for enhancing the activities by employing the polyvinylpyrrolidone (PVP) additive, where a series of supported Au nanoparticle catalysts including Au/C, Au/BN, Au/TiO2, and Au/SBA-15 exhibited significantly higher activities in the oxidation of various alcohols and carbon monoxide by molecular oxygen after adding PVP to the reaction system. The XPS study indicates that PVP could electronically interact with Au to form high active Au sites for molecular oxygen, thus causing improved activities for the various oxidation reactions.

Modified Markó’s aerobic oxidation of alcohols under atmospheric pressure with air or molecular oxygen at room temperature

2012 ◽  
Vol 53 (44) ◽  
pp. 5880-5882 ◽  
Author(s):  
Takeshi Nishii ◽  
Tomomi Ouchi ◽  
Aya Matsuda ◽  
Yuka Matsubara ◽  
Yuuko Haraguchi ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Aerobic Oxidation ◽  
Oxidation Of Alcohols

scholarly journals A Bio-Inspired Lanthanum-Ortho Quinone Catalyst for Aerobic Oxidation of Alcohol

2020 ◽  
Author(s):  
Ruipu Zhang ◽  
Long Zhang ◽  
Ming-Tian Zhang ◽  
Sanzhong Luo
Keyword(s):  
Aerobic Oxidation ◽  
Earth Metal ◽  
Open Shell ◽  
Oxidation Catalysis ◽  
Oxidation Catalyst ◽  
Oxidation Reactions ◽  
Reductive Activation ◽  
Ambient Conditions ◽  
Semiquinone Radicals ◽  
Oxidation Of Alcohols

<p>Oxidation reactions are fundamental transformations in organic synthesis and chemical industry. With oxygen or air as terminal oxidant, aerobic oxidation catalysis provides the most sustainable and economic oxidation processes. Most aerobic oxidation catalysis employs redox metal as its active center. While nature provides non-redox metal strategy as in pyrroloquinoline quinone (PQQ)-dependent methanol dehydrogenases (MDH), such an effective chemical version is unknown. Inspired by the recently discovered rare earth metal-dependent enzyme Ln-MDH, here we show that an open-shell semi-quinone anionic radical species in complexing with lanthanum could serve as a very efficient aerobic oxidation catalyst under ambient conditions. In this catalyst, the lanthanum metal serves only as a Lewis acid promoter and the redox process occurs exclusively on the semiquinone ligand. The catalysis is initiated by 1e<sup>-</sup>-reduction of lanthanum-activated <i>ortho</i>-quinone to a semiquinone-lanthanum complex La(<b>SQ<sup>-.</sup></b>)<sub>2</sub>, which undergoes a coupled O-H/C-H dehydrogenation for aerobic oxidation of alcohols with up to 330 h<sup>-1</sup> TOF. This study suggests a possible functional mode of semiquinone radicals, widely observed with quinoproteins in Nature. Moreover, this unique reductive activation strategy as well as the resulted radical anion as redox ligand creates a new turning point in the development of efficient aerobic oxidation catalysis.</p>

Highly efficient sulfonated-polystyrene–Cu(II)@Cu3(BTC)2 core–shell microsphere catalysts for base-free aerobic oxidation of alcohols

2015 ◽  
Vol 3 (8) ◽  
pp. 4266-4273 ◽  
Author(s):  
Xiaowei Zhang ◽  
Wenjun Dong ◽  
Yi Luan ◽  
Mu Yang ◽  
Li Tan ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Aerobic Oxidation ◽  
Core Shell ◽  
Sulfonated Polystyrene ◽  
Highly Efficient ◽  
Oxidation Of Alcohols

A novel core–shell SPS–Cu(II)@Cu3(BTC)2 catalyst was developed for the aerobic oxidation of alcohols by molecular oxygen under base-free conditions.

Cobalt(II) Perfluorooctane Sulfonate Catalyzed Highly Efficient Aerobic Oxidation of Alcohols in Fluorous Biphasic Systems

2006 ◽  
Vol 59 (5) ◽  
pp. 349 ◽  
Author(s):  
Wen-Bin Yi ◽  
Chun Cai
Keyword(s):  
Molecular Oxygen ◽  
Atmospheric Pressure ◽  
Carbonyl Compounds ◽  
Aerobic Oxidation ◽  
Perfluorooctane Sulfonate ◽  
Highly Efficient ◽  
Oxidation Of Alcohols ◽  
Biphasic Systems

Cobalt(ii) perfluorooctane sulfonate (Co(OPf)2) acts as a novel homogeneous pre-catalyst for the oxidation of various types of alcohols to carbonyl compounds under atmospheric pressure of molecular oxygen in fluorous biphasic systems. By simple separation of the fluorous phase, which contains only pre-catalyst, the reaction can be repeated several times.

scholarly journals Aerobic oxidation catalysis with stable radicals

2014 ◽  
Vol 50 (35) ◽  
pp. 4524-4543 ◽  
Author(s):  
Qun Cao ◽  
Laura M. Dornan ◽  
Luke Rogan ◽  
N. Louise Hughes ◽  
Mark J. Muldoon
Keyword(s):  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Aerobic Oxidation ◽  
Point Of View ◽  
Oxidation Catalysis ◽  
Industrial Scale ◽  
Oxidation Reactions ◽  
Traditional Methods ◽  
Stable Radicals ◽  
Selective Oxidation Reactions

Selective oxidation reactions are challenging when carried out on an industrial scale. Many traditional methods are undesirable from an environmental or safety point of view. There is a need to develop sustainable catalytic approaches that use molecular oxygen as the terminal oxidant. This review will discuss recent advances in the use of stable radicals in aerobic oxidation catalysis.

A rational design of a Pd-based catalyst with a metal–metal oxide interface influencing molecular oxygen in the aerobic oxidation of alcohols

2019 ◽  
Vol 21 (9) ◽  
pp. 2494-2503 ◽  
Author(s):  
Songhita Meher ◽  
Rohit Kumar Rana
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Molecular Oxygen ◽  
Rational Design ◽  
Aerobic Oxidation ◽  
Oxide Interface ◽  
Metal Metal ◽  
Oxidation Of Alcohols

The Pd–PdO interface stabilized on the rGO surface is shown to be the key to achieve enhanced catalytic activity in oxidation of alcohols under O2 as the oxidant.

scholarly journals A novel iron(iii)-based heterogeneous catalyst for aqueous oxidation of alcohols using molecular oxygen

RSC Advances ◽  
2015 ◽  
Vol 5 (96) ◽  
pp. 78553-78560 ◽  
Author(s):  
Debojeet Sahu ◽  
Ana Rosa Silva ◽  
Pankaj Das
Keyword(s):  
Molecular Oxygen ◽  
Heterogeneous Catalyst ◽  
Alcohol Oxidation ◽  
Oxidation Reactions ◽  
Immobilized Catalyst ◽  
Oxidation Of Alcohols ◽  
Aqueous Oxidation

The first example of an iron(iii)-based heterogeneous catalyst for alcohol oxidation reactions in water employing molecular oxygen has been reported. Interestingly, the immobilized catalyst shows superior activity over its homogeneous counterpart.

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