Effects of copper-precursors on the catalytic activity of Cu/graphene catalysts for the selective catalytic oxidation of ammonia

2017 ◽  
Vol 412 ◽  
pp. 37-44 ◽  
Author(s):  
Jingying Li ◽  
Xiaolong Tang ◽  
Honghong Yi ◽  
Qingjun Yu ◽  
Fengyu Gao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Selective Catalytic Oxidation ◽  
Oxidation Of Ammonia

Promotional effects of ascorbic acid on the low-temperature catalytic activity of selective catalytic oxidation of ammonia over Pt/SA: effect of Pt0 content

2020 ◽  
Vol 44 (10) ◽  
pp. 4108-4113 ◽  
Author(s):  
Jingying Liu ◽  
Qingjin Lin ◽  
Shuang Liu ◽  
Shuhao Xu ◽  
Haidi Xu ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Catalytic Oxidation ◽  
Selective Catalytic Oxidation ◽  
Lower Temperature ◽  
Oxidation Of Ammonia

The amount of Pt species was increased by the addition of ascorbic acid to the Pt/SiAl catalyst, which shifted the temperature of the NH3-SCO reaction between NH3 and O2 to a lower temperature.

scholarly journals Comparison of Cu-Mg-Al-Ox and Cu/Al2O3 in selective catalytic oxidation of ammonia (NH3-SCO)

2018 ◽  
Vol 110 ◽  
pp. 5-9 ◽  
Author(s):  
Magdalena Jabłońska ◽  
Bernd Wolkenar ◽  
Andrew M. Beale ◽  
Stefan Pischinger ◽  
Regina Palkovits
Keyword(s):  
Catalytic Oxidation ◽  
Selective Catalytic Oxidation ◽  
Oxidation Of Ammonia

scholarly journals Novel Effect of Zinc Nitrate/Vanadyl Oxalate for Selective Catalytic Oxidation of α-Hydroxy Esters to α-Keto Esters with Molecular Oxygen: An In Situ ATR-IR Study

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1281 ◽  
Author(s):  
Yongwei Ju ◽  
Zhongtian Du ◽  
Chuhong Xiao ◽  
Xingfei Li ◽  
Shuang Li
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Aerobic Oxidation ◽  
Value Added ◽  
Attenuated Total Reflection ◽  
Reaction Conditions ◽  
Keto Esters ◽  
Selective Catalytic Oxidation ◽  
Hydroxy Esters

Selective oxidation of α-hydroxy esters is one of the most important methods to prepare high value-added α-keto esters. An efficient catalytic system consisting of Zn(NO3)2/VOC2O4 is reported for catalytic oxidation of α-hydroxy esters with molecular oxygen. Up to 99% conversion of methyl DL-mandelate or methyl lactate could be facilely obtained with high selectivity for its corresponding α-keto ester under mild reaction conditions. Zn(NO3)2 exhibited higher catalytic activity in combination with VOC2O4 compared with Fe(NO3)3 and different nitric oxidative gases were detected by situ attenuated total reflection infrared (ATR-IR) spectroscopy. UV-vis and ATR-IR results indicated that coordination complex formed in Zn(NO3)2 in CH3CN solution was quite different from Fe(NO3)3; it is proposed that the charge-transfer from Zn2+ to coordinated nitrate groups might account for the generation of different nitric oxidative gases. The XPS result indicate that nitric oxidative gas derived from the interaction of Zn(NO3)2 with VOC2O4 could be in favor of oxidizing VOC2O4 to generate active vanadium (V) species. It might account for different catalytic activity of Zn(NO3)2 or Fe(NO3)3 combined with VOC2O4. This work contributes to further development of efficient aerobic oxidation under mild reaction conditions.

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