scholarly journals Bimetallic Pt-Co Nanoparticle Deposited on Alumina for Simultaneous CO and Toluene Oxidation in the Presence of Moisture

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 230
Author(s):  
Peng Peng ◽  
Jun Li ◽  
Shengpeng Mo ◽  
Qi Zhang ◽  
Taiming Shen ◽  
...  
Keyword(s):  
Noble Metal ◽  
Mixed Gas ◽  
Competitive Reaction ◽  
Alumina Support ◽  
Toluene Oxidation ◽  
Catalytic Activities ◽  
Metal Elements ◽  
Synthetic Strategy ◽  
Redox Ability ◽  
Al2o3 Catalyst

Carbon monoxide (CO) and hydrocarbons (HCs) generally have competitive adsorption on the active site of noble-metal nano-catalysts, thus developing an effective way to reduce the passivation of competitive reaction with each other is an urgent problem. In this study, we successfully synthesized transition metal-noble metal (Pt-M) alloys via introducing inexpensive metal elements (M = Ni, Co and Cu) into Pt particles and then deposited on alumina support to form Pt-based catalysts. Subsequently, we choose CO and toluene as polluting gases to evaluate the catalytic activities of Pt-M/Al2O3 catalysts. Introducing inexpensive metal elements (M = Ni, Co, and Cu) significantly changed the physicochemical properties and catalytic activities of these Pt-based catalysts. It can be found that the Pt-Co/Al2O3 catalyst exhibited outstanding catalytic activity for CO and toluene oxidation under mixed gas atmosphere, compared with other Pt-based catalysts, which is due to the higher dispersity, more surface adsorption oxygen, and well redox ability. Surprisingly, H2O could promote the catalytic activities for CO/toluene co-oxidation over the Pt-Co/Al2O3 catalyst. Thus, the present synthetic strategy not only opens an avenue towards the synthesis of noble metal-based catalysts, but also provides an excellent tolerance to H2O in the catalytic process.

scholarly journals Catalytic Elimination of Carbon Monoxide, Ethyl Acetate, and Toluene over the Ni/OMS-2 Catalysts

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 581
Author(s):  
Ning Dong ◽  
Mengyue Chen ◽  
Qing Ye ◽  
Dan Zhang ◽  
Hongxing Dai
Keyword(s):  
Ethyl Acetate ◽  
Molecular Sieve ◽  
Space Velocity ◽  
Oxidation Of Co ◽  
Toluene Oxidation ◽  
Catalytic Activities ◽  
Catalytic Mechanisms ◽  
Ni Species ◽  
Synthesized Materials ◽  
Incorporation Method

The Ni-loaded cryptomelane-type manganese oxide octahedral molecular sieve (OMS-2) catalysts (xNi/OMS-2: x = 1, 3, 5, and 10 wt%) were prepared by a pre-incorporation method. Physicochemical properties of the as-synthesized materials were characterized by means of various techniques, and their catalytic activities for CO, ethyl acetate, and toluene oxidation were evaluated.The loading of Ni played an important role in improving physicochemical propertiesof OMS-2. Among all of the samples, 5Ni/OMS-2 exhibited the best catalytic activity, with the T90 being 155 °C for CO oxidation at a space velocity (SV) of 60,000 mL/(g·h), 225°C for ethyl acetate oxidation at an SV of 240,000 mL/(g·h), and 300 °C for toluene oxidation at an SV of 240,000 mL/(g·h), which was due to its high Mn3+ content and Oads concentration, good low-temperature reducibility and lattice oxygen mobility, and strong interaction between the Ni species and the OMS-2 support. In addition, catalytic mechanisms of the oxidation of three pollutants over 5Ni/OMS-2 were also studied. The oxidation of CO, ethyl acetate, and toluene over the catalysts took place first via the activated adsorption, then intermediates formation, and finally complete conversion of the formed intermediates to CO2 and H2O.

Effect of chemical modification on oligomerization capacity of alumina support for Pd-Al2O3 catalyst

2011 ◽  
Vol 84 (8) ◽  
pp. 1385-1393 ◽  
Author(s):  
A. A. Lamberov ◽  
I. F. Khalilov ◽  
I. R. IL’yasov ◽  
A. Sh. Bikmurzin ◽  
V. M. Shatilov ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Alumina Support ◽  
Al2o3 Catalyst

Effective toluene oxidation under ozone over mesoporous MnOx/γ-Al2O3 catalyst prepared by solvent deficient method: Effect of Mn precursors on catalytic activity

2021 ◽  
Vol 195 ◽  
pp. 110876
Author(s):  
Kannapu Hari Prasad Reddy ◽  
Beom-Sik Kim ◽  
Su Shiung Lam ◽  
Sang-Chul Jung ◽  
JiHyeon Song ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Toluene Oxidation ◽  
Method Effect ◽  
Al2o3 Catalyst

Hydrodesulfurization of Different Feeds on CoMo/Al2O3 Catalyst Prepared Using Cobalt Heteropolyoxomolybdate

2008 ◽  
Vol 73 (8-9) ◽  
pp. 983-999 ◽  
Author(s):  
Alla Spojakina ◽  
Květuše Jirátová ◽  
Václav Novák ◽  
Radostina Palcheva ◽  
Luděk Kaluža
Keyword(s):  
Physicochemical Properties ◽  
Gas Oil ◽  
Reaction Conditions ◽  
Alumina Support ◽  
Hds Catalysts ◽  
Light Gas Oil ◽  
Al2o3 Catalyst

CoMo/Al2O3 catalyst prepared by impregnation of alumina support with cobalt heteropolyoxomolybdate was tested in hydrodesulfurization (HDS) of thiophene, 1-benzothiophene, or light gas oil under various reaction conditions and reactor arrangements. Its physicochemical properties are also examined. The obtained data are compared with those of two industrial HDS catalysts.

Catalytic activities of noble metal atoms on WO3 (001): nitric oxide adsorption

nano Online ◽  
2016 ◽  
Author(s):  
Xiaoyan Ren ◽  
Shuai Zhang ◽  
Chong Li ◽  
Shunfang Li ◽  
Yu Jia ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Noble Metal ◽  
Catalytic Activities ◽  
Metal Atoms ◽  
Nitric Oxide Adsorption

Composition-Dependent Catalytic Activities of Noble-Metal-Free NiS/Ni3S4 for Hydrogen Evolution Reaction

2016 ◽  
Vol 120 (27) ◽  
pp. 14581-14589 ◽  
Author(s):  
Zhixiao Qin ◽  
Yubin Chen ◽  
Zhenxiong Huang ◽  
Jinzhan Su ◽  
Zhidan Diao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Noble Metal ◽  
Hydrogen Evolution Reaction ◽  
Metal Free ◽  
Catalytic Activities

Noble metal ions in CeO2 and TiO2: synthesis, structure and catalytic properties

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 94949-94979 ◽  
Author(s):  
Parthasarathi Bera ◽  
M. S. Hegde
Keyword(s):  
Metal Ions ◽  
Noble Metal ◽  
Catalytic Properties ◽  
Water Gas Shift ◽  
Electronic Interactions ◽  
Catalytic Activities ◽  
Water Gas ◽  
Very High

CeO2 and TiO2 based noble metal ionic catalysts show very high catalytic activities toward several reactions such as auto exhaust, water gas shift, H2 + O2 recombination compared to supported nanometal catalysts due to their electronic interactions.

scholarly journals Surface engineering-modulated porous N-doped rod-like molybdenum phosphide catalysts: towards high activity and stability for hydrogen evolution reaction over a wide pH range

RSC Advances ◽  
2018 ◽  
Vol 8 (47) ◽  
pp. 26871-26879 ◽  
Author(s):  
Liying Chai ◽  
Wenyu Yuan ◽  
Xue Cui ◽  
Haiying Jiang ◽  
Junwang Tang ◽  
...  
Keyword(s):  
Hydrogen Evolution Reaction ◽  
Surface Engineering ◽  
Cyclic Stability ◽  
One Dimensional ◽  
Nitrogen Doped ◽  
Catalytic Activities ◽  
Synthetic Strategy ◽  
Molybdenum Phosphide ◽  
Wide Ph Range ◽  
Ph Range

Porous one-dimensional (1D) nitrogen-doped molybdenum phosphide (N-MoP) nanorods can be produced via a two-step synthetic strategy. The prepared N-MoP catalysts show high HER catalytic activities and cyclic stability over a wide pH range.

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