Enhanced Catalytic Oxidation of Chlorobenzene over MnO2 Grafted In Situ by Rare Earth Oxide: Surface Doping Induces Lattice Oxygen Activation

2020 ◽  
Vol 59 (19) ◽  
pp. 14407-14414 ◽  
Author(s):  
Lizhong Liu ◽  
Ruoyu Liu ◽  
Tong Xu ◽  
Qiang Zhang ◽  
Yubin Tan ◽  
...  
Keyword(s):  
Rare Earth ◽  
Catalytic Oxidation ◽  
Oxygen Activation ◽  
Rare Earth Oxide ◽  
Lattice Oxygen ◽  
Oxide Surface ◽  
Surface Doping

scholarly journals Catalytic Oxidation of HCHO over the Sodium-Treated Sepiolite-Supported Rare Earth (La, Eu, Dy, and Tm) Oxide Catalysts

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 328 ◽  
Author(s):  
Ning Dong ◽  
Qing Ye ◽  
Mengyue Chen ◽  
Shuiyuan Cheng ◽  
Tianfang Kang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Catalytic Oxidation ◽  
Rare Earth Oxide ◽  
Catalytic Performance ◽  
Rare Earth Oxides ◽  
Hydroxyl Groups ◽  
In Situ Drifts ◽  
The Rare Earth

The sodium-treated sepiolite (NaSep)-supported rare earth oxide (RE/NaSep; RE = La, Eu, Dy, and Tm) samples were prepared using the rotary evaporation method. Physicochemical properties of these materials were characterized by XRD, SEM, BET, FTIR, XPS, H2–TPR, NH3–TPD, and in situ DRIFTS, and their catalytic activities for formaldehyde (HCHO) (2000 ppm) oxidation were evaluated. The results show that loading of the rare earth oxide on NaSep improved its catalytic performance. Among all the samples, Eu/NaSep performed the best, and complete HCHO conversion was achieved at a temperature of 150 °C and a gas hourly space velocity of 240,000 mL/(g h); a good catalytic activity was still maintained after 45 h of stability test. The catalytic oxidation mechanism of HCHO was studied using the in situ DRIFTS technique. As a result, the effective and stable catalytic performance of the Eu/NaSep sample was mainly due to the presence of hydroxyl groups on the sepiolite surface and the doped rare earth oxides, which contributed to its high performance. HCHO oxidation underwent via the steps of HCHO + O2 → HCOO− + OH− → H2O + CO2. It is concluded that the optimal catalytic activity of Eu/NaSep was associated with the highest Oads/Olatt atomic ratio, the largest amount of hydroxyl groups, the highest acidity, and the best reducibility. The present work may provide new insights into the application in the removal of high-concentration HCHO over the rare earth oxides supported on natural low-cost clays.

scholarly journals Self-sacrificed two-dimensional REO(CH3COO) template-assisted synthesis of ultrathin rare earth oxide nanoplates

2017 ◽  
Vol 4 (7) ◽  
pp. 1182-1186 ◽  
Author(s):  
Rui Liu ◽  
Ke Wu ◽  
Lin-Dong Li ◽  
Ling-Dong Sun ◽  
Chun-Hua Yan
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxide ◽  
Two Dimensional ◽  
Injection Method ◽  
Hot Injection ◽  
Template Assisted Synthesis

Ultrathin RE2O3nanoplates are synthesized by a hot-injection methodviathein situformed REO(CH3COO) template.

Laser cladding in-situ carbide particle reinforced Fe-based composite coatings with rare earth oxide addition

2009 ◽  
Vol 27 (6) ◽  
pp. 997-1002 ◽  
Author(s):  
Chaofeng WU ◽  
Mingxing MA ◽  
Wenjin LIU ◽  
Minlin ZHONG ◽  
Hongjun ZHANG ◽  
...  
Keyword(s):  
Rare Earth ◽  
Laser Cladding ◽  
Carbide Particle ◽  
Composite Coatings ◽  
Rare Earth Oxide ◽  
Oxide Addition

Oxygen activation by copper camphor complexes

2015 ◽  
Vol 2 (11) ◽  
pp. 1019-1028 ◽  
Author(s):  
Alexandra P. S. Roseiro ◽  
Pedro Adão ◽  
Adelino M. Galvão ◽  
João Costa Pessoa ◽  
Ana M. Botelho do Rego ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Oxygen Activation

In situreduction of CuCl2enables formation of Cu(i) complexes prone to activate molecular oxygen from air towards catalytic oxidation of 1,3-dicarbonyls.

Lean NOxReduction by Hydrogen over Pt-Supported Rare Earth Oxide Catalysts and Their In Situ DRIFTs Study

2009 ◽  
Vol 82 (9) ◽  
pp. 1197-1202 ◽  
Author(s):  
Masahiro Itoh ◽  
Koji Motoki ◽  
Makoto Saito ◽  
Jun Iwamoto ◽  
Ken-ichi Machida
Keyword(s):  
Rare Earth ◽  
Rare Earth Oxide ◽  
Oxide Catalysts ◽  
In Situ Drifts
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