Selective Catalytic Oxidation of Methane to Syngas over Supported Mixed Oxides Containing Ni and Pt

2004 ◽  
Vol 45 (4) ◽  
pp. 589-597 ◽  
Author(s):  
S. N. Pavlova ◽  
N. N. Sazonova ◽  
V. A. Sadykov ◽  
O. I. Snegurenko ◽  
V. A. Rogov ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Mixed Oxides ◽  
Oxidation Of Methane ◽  
Selective Catalytic Oxidation

Selective Catalytic Oxidation of H2S over Well-Mixed Oxides Derived from Mg2AlxV1–x Layered Double Hydroxides

ACS Catalysis ◽  
2014 ◽  
Vol 4 (5) ◽  
pp. 1500-1510 ◽  
Author(s):  
Xin Zhang ◽  
Zhuo Wang ◽  
Nanli Qiao ◽  
Siqiu Qu ◽  
Zhengping Hao
Keyword(s):  
Catalytic Oxidation ◽  
Layered Double Hydroxides ◽  
Mixed Oxides ◽  
Selective Catalytic Oxidation ◽  
Double Hydroxides

scholarly journals Water-Involved Methane Selective Catalytic Oxidation by Dioxygen over Copper-Zeolites

2020 ◽  
Author(s):  
Lanlan Sun ◽  
Yu Wang ◽  
Chuanming Wang ◽  
Zaiku Xie ◽  
Naijia Guan ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Selective Oxidation ◽  
Density Functional ◽  
Density Functional Theory Calculations ◽  
High Catalytic Activity ◽  
Oxidation Of Methane ◽  
Selective Catalytic Oxidation ◽  
Catalyst Temperature ◽  
Temperature Programmed ◽  
Space Time Yield

<p>The selective oxidation of methane to methanol is a dream reaction of direct methane functionalization, which remains a key challenge in catalysis and a hot issue of controversy. Herein, we report the water-involved methane selective catalytic oxidation by dioxygen over copper-zeolites. At 573 K, a state-of-the-art methanol space-time yield of 543 mmol/mol<sub>Cu</sub>/h with methanol selectivity of 91 % is achieved with Cu-CHA catalyst. Temperature-programmed surface reactions with isotope labelling determine water as the dominating oxygen and hydrogen source of hydroxyl in methanol while dioxygen participates in the reaction <a></a><a>through reducing to water</a>. Spectroscopic analyses reveal the fast redox cycle of Cu<sup>2+</sup>-Cu<sup>+</sup>-Cu<sup>2+</sup> during methane selective oxidation, which is closely related to the high catalytic activity of Cu-CHA. Density functional theory calculations suggest that both CuOH monomer and dimer in Cu-CHA can catalyze the selective oxidation of methane to methanol with Cu-OOH as the key reaction intermediate, and meanwhile, various copper sites undergo interconversion under reaction conditions.<br></p>

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