scholarly journals Facile synthesis of CuMAl (M = Cr, Mn, Zn, and Co) with highly dispersed Cu and tailorable surface acidity for efficient 2-methylpyrazine synthesis

RSC Advances ◽  
2017 ◽  
Vol 7 (77) ◽  
pp. 48662-48669 ◽  
Author(s):  
Jindou Hou ◽  
Wen. Luo ◽  
Shizhong Luo ◽  
Chao Lin ◽  
Ping Liu ◽  
...  
Keyword(s):  
Surface Acidity ◽  
High Surface ◽  
Catalytic Performance ◽  
Facile Synthesis ◽  
Highly Dispersed

Synthesis of 2-methylpyrazine requires the well-designed CuMAl catalysts with bifunctional sites. Through alternating M species (M = Cr, Mn, Zn, and Co), highly dispersed Cu0 and high surface acidity can be achieved, thereby approaching the optimized catalytic performance.

Large-scale and facile synthesis of a porous high-entropy alloy CrMnFeCoNi as an efficient catalyst

2020 ◽  
Vol 8 (35) ◽  
pp. 18318-18326 ◽  
Author(s):  
Hailong Peng ◽  
Yangcenzi Xie ◽  
Zicheng Xie ◽  
Yunfeng Wu ◽  
Wenkun Zhu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Large Scale ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Performance ◽  
High Entropy Alloy ◽  
Facile Synthesis ◽  
Efficient Catalyst ◽  
High Entropy

Porous high entropy alloy CrMnFeCoNi exhibited remarkable catalytic activity and stability toward p-nitrophenol hydrogenation. The enhanced catalytic performance not only resulted from the high surface area, but also from exposed high-index facets with terraces.

Facile synthesis of hollow hierarchical Ni/γ-Al2O3 nanocomposites for methane dry reforming catalysis

RSC Advances ◽  
2014 ◽  
Vol 4 (93) ◽  
pp. 51184-51193 ◽  
Author(s):  
Qing Zhang ◽  
Tao Wu ◽  
Peng Zhang ◽  
Ruijuan Qi ◽  
Rong Huang ◽  
...  
Keyword(s):  
Surface Area ◽  
Strong Interaction ◽  
High Surface ◽  
High Surface Area ◽  
Hollow Structure ◽  
Catalytic Performance ◽  
Dry Reforming ◽  
Facile Synthesis ◽  
Methane Dry Reforming ◽  
Accessible Surface

Hierarchical Ni/Al2O3 nanocomposite possesses a high surface area, high loading of well dispersed metal nanoparticles, and a hierarchical hollow structure. The strong interaction between metal and support and the large open accessible surface lead to excellent sintering and carbon resistance, and superior catalytic performance in methane dry reforming.

Montmorillonite intercalated with SiO2, SiO2-Al2O3 or SiO2-TiO2 pillars by surfactant-directed method as catalytic supports for DeNOx process

2014 ◽  
Vol 68 (9) ◽  
Author(s):  
Lucjan Chmielarz ◽  
Andrzej Kowalczyk ◽  
Magdalena Wojciechowska ◽  
Paweł Boroń ◽  
Barbara Dudek ◽  
...  
Keyword(s):  
Transition Metal ◽  
Catalytic Reduction ◽  
Surface Acidity ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Performance ◽  
Pillared Clay ◽  
Metal Species ◽  
Reduction Of No ◽  
Catalytic Supports

AbstractThe intercalation of natural montmorillonite with SiO2, SiO2-Al2O3 or SiO2-TiO2 pillars by the surfactant-directed method resulted in the formation of high surface area porous materials; these were tested as catalytic supports for the process of selective catalytic reduction of NO (DeNOx). The incorporation of titanium or aluminium into the structure of the silica pillars significantly increased the surface acidity of the clay samples. Iron and copper were deposited onto the surface of the pillared clays mainly in the form of monomeric isolated cations and oligomeric metal oxide species. The contribution of the latter species was higher in the clay intercalated with SiO2-TiO2 pillars than in the samples modified with SiO2 and SiO2-Al2O3 pillars. The pillared clay-based catalysts were active in the DeNOx process but, in this group, the best results were obtained for the clay intercalated with SiO2-TiO2 pillars and doped with iron and copper. The catalytic performance of the samples is discussed in respect of their surface acidity and active forms of transition metal species deposited.

High-Surface - Area Framework Zirconium Phosphates as Catalysts of Hexane Isomerization and Dehydroaromatization: Synthesis and Properties

1998 ◽  
Vol 549 ◽  
Author(s):  
Vladislav A. Sadykov ◽  
S. N. Pavlova ◽  
G. V. Zabolotnaya ◽  
D. I. Kochubey ◽  
R. I. Maximovskaya ◽  
...  
Keyword(s):  
Surface Area ◽  
Mechanochemical Activation ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Catalytic Performance ◽  
Type Complex ◽  
Zirconium Phosphates ◽  
Highly Dispersed ◽  
Inorganic Precursors

AbstractMechanochemical activation of solid inorganic precursors and sol-gel routes followed by hydrothermal treatment in the presence of surfactants were used to synthesize highly dispersed NZP-type complex zirconium phosphates. Genesis of samples real structure and its impact on the surface properties and catalytic performance in the reactions of hexane isomerization and dehydroaromatization have been studied.

COx-free hydrogen production via ammonia decomposition over mesoporous Co/Al2O3 catalysts with highly dispersed Co species synthesized by a facile method

2021 ◽  
Author(s):  
Yingqiu Gu ◽  
Di Xu ◽  
Yun Huang ◽  
Zhouyang Long ◽  
Guojian Chen
Keyword(s):  
Fuel Cells ◽  
Hydrogen Production ◽  
Transition Metal ◽  
Transition Metals ◽  
Ammonia Decomposition ◽  
Metal Catalyst ◽  
Facile Synthesis ◽  
Transition Metal Catalyst ◽  
Highly Dispersed ◽  
Free Hydrogen

Transition metals have been considered as potential catalysts for ammonia decomposition to produce COx-free hydrogen for fuel cells. However, the facile synthesis of transition metal catalyst with small size active...

scholarly journals Highly dispersed Pt atoms and clusters on hydroxylated indium tin oxide: A view from first-principles calculations

2021 ◽  
Author(s):  
Simran Kumari ◽  
Philippe Sautet
Keyword(s):  
Heterogeneous Catalysis ◽  
Metal Atom ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
First Principles ◽  
Catalytic Performance ◽  
Small Cluster ◽  
Single Atom ◽  
First Principles Calculations ◽  
Highly Dispersed

Supported single-atom and small cluster catalysts have become highly popular in heterogeneous catalysis. These catalysts can maximize the metal atom utilization while still showcasing superior catalytic performance. One of the...

scholarly journals Ultra-small and highly-dispersed MoP particles for remarkable enhanced catalytic performance in higher alcohols synthesis

2020 ◽  
Vol 137 ◽  
pp. 105945 ◽  
Author(s):  
Bin Kang ◽  
Shuxia Qi ◽  
Xiaoman Wang ◽  
Fenghua Bai ◽  
Na Wang ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Higher Alcohols ◽  
Higher Alcohols Synthesis ◽  
Highly Dispersed

Effect of TiO2 crystal form on the denitration performance of Ce–W–Ti catalyst

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Xue Bian ◽  
Yuntao Yu ◽  
Nana Hao ◽  
Wenyuan Wu
Keyword(s):  
Titanium Dioxide ◽  
Mixed Crystal ◽  
Surface Acidity ◽  
High Surface ◽  
Crystal Form ◽  
Large Specific Surface Area ◽  
Metatitanic Acid ◽  
Pure Phase ◽  
Crystal Phases ◽  
Better Than

Abstract Titanium dioxide supports, which were prepared by roasting metatitanic acid under different conditions, were used to prepare a series of Ce–W–Ti catalysts. The structure and denitration properties of the catalyst were studied. The results showed that TiO2 had different crystal types (mixed crystal phases with different proportions of anatase and rutile) under different roasting conditions, and the denitration efficiency of mixed crystal was better than that of pure phase TiO2. Ce–W/200 °C-1 hTiO2 catalyst exhibited a prominent NO conversion rate, and it can reach higher than 90% at a temperature range from 250 to 500°C. The large specific surface area, low content of rutile TiO2 in the support, high content of chemical adsorbed oxygen and high surface acidity were favorable to denitration performance of Ce–W–Ti catalyst.

Facile Synthesis of Nanoporous Carbons with High Surface Area and Their CO2 Adsorption Properties

2015 ◽  
Vol 44 (7) ◽  
pp. 1004-1006
Author(s):  
Takahito Mitome ◽  
Yoshiaki Uchida ◽  
Norikazu Nishiyama
Keyword(s):  
Surface Area ◽  
Co2 Adsorption ◽  
High Surface ◽  
High Surface Area ◽  
Adsorption Properties ◽  
Facile Synthesis ◽  
Nanoporous Carbons
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