Novel SiO 2 ‐Supported Chromocene and Vanadium Bimetallic Catalysts Producing Bimodal Polyethylene

2020 ◽  
Vol 221 (13) ◽  
pp. 2000067 ◽  
Author(s):  
Kai Wang ◽  
Rui Zhang ◽  
He Ren ◽  
Ning Zhao ◽  
Yulong Jin ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Bimodal Polyethylene

Novel SiO2-Supported Chromium Oxide(Cr)/Vanadium Oxide(V) Bimetallic Catalysts for Production of Bimodal Polyethylene

2015 ◽  
Vol 9 (5) ◽  
pp. 462-472 ◽  
Author(s):  
Ruihua Cheng ◽  
Xin Xue ◽  
Weiwei Liu ◽  
Ning Zhao ◽  
Xuelian He ◽  
...  
Keyword(s):  
Vanadium Oxide ◽  
Chromium Oxide ◽  
Bimetallic Catalysts ◽  
Bimodal Polyethylene

Effects of Alkyl Aluminum on SiO2 -Supported Silyl-Chromate(Cr)/Imido-Vanadium(V) Bimetallic Catalysts for Producing Bimodal Polyethylene

2017 ◽  
Vol 11 (5) ◽  
pp. 1700006 ◽  
Author(s):  
Bangming Liu ◽  
Ning Zhao ◽  
Yulong Jin ◽  
Ruihua Cheng ◽  
Xuelian He ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Bimodal Polyethylene

Structure and composition of metal particles in Pt-Sn/Al2O3 bimetallic catalysts

1990 ◽  
Vol 48 (4) ◽  
pp. 278-279
Author(s):  
A. Sachdev ◽  
J. Schwank
Keyword(s):  
Bimetallic Catalysts ◽  
Bimetallic Catalyst ◽  
Size Structure ◽  
High Surface ◽  
High Surface Area ◽  
Metal Particles ◽  
Alloy Formation ◽  
Particle Size Range ◽  
Oxide Supports ◽  
Petroleum Fractions

Platinum - tin bimetallic catalysts have been primarily utilized in the chemical industry in the catalytic reforming of petroleum fractions. In this process the naphtha feedstock is converted to hydrocarbons with higher octane numbers and high anti-knock qualities. Most of these catalysts contain small metal particles or crystallites supported on high surface area insulating oxide supports. The determination of the structure and composition of these particles is crucial to the understanding of the catalytic behavior. In a bimetallic catalyst it is important to know how the two metals are distributed within the particle size range and in what way the addition of a second metal affects the size, structure and composition of the metal particles. An added complication in the Pt-Sn system is the possibility of alloy formation between the two elements for all atomic ratios.

Nb2C MXene assisted CoNi bimetallic catalysts for hydrogenolysis of aromatic ethers

2021 ◽  
Author(s):  
Sen-Wang Wang ◽  
Zhen-Hong He ◽  
Jian-Gang Chen ◽  
Kuan Wang ◽  
Zhong-Yu Wang ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Precious Metal ◽  
Renewable Biomass ◽  
Biomass Resources

Hydrogenolysis of biomass-derived lignin sources is highly important for the conversion of renewable biomass resources to biofuels. However, lots of developed catalysts suffer from the drawbacks of expensive precious metal...

scholarly journals High-throughput computational-experimental screening protocol for the discovery of bimetallic catalysts

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Byung Chul Yeo ◽  
Hyunji Nam ◽  
Hyobin Nam ◽  
Min-Cheol Kim ◽  
Hong Woo Lee ◽  
...  
Keyword(s):  
High Throughput ◽  
Bimetallic Catalysts ◽  
High Throughput Screening ◽  
Direct Synthesis ◽  
Catalytic Performance ◽  
Platinum Group Metals ◽  
Pt Catalyst ◽  
Electronic Density ◽  
Bimetallic Alloy ◽  
Screening Protocol

AbstractTo accelerate the discovery of materials through computations and experiments, a well-established protocol closely bridging these methods is required. We introduce a high-throughput screening protocol for the discovery of bimetallic catalysts that replace palladium (Pd), where the similarities in the electronic density of states patterns were employed as a screening descriptor. Using first-principles calculations, we screened 4350 bimetallic alloy structures and proposed eight candidates expected to have catalytic performance comparable to that of Pd. Our experiments demonstrate that four bimetallic catalysts indeed exhibit catalytic properties comparable to those of Pd. Moreover, we discover a bimetallic (Ni-Pt) catalyst that has not yet been reported for H2O2 direct synthesis. In particular, Ni61Pt39 outperforms the prototypical Pd catalyst for the chemical reaction and exhibits a 9.5-fold enhancement in cost-normalized productivity. This protocol provides an opportunity for the catalyst discovery for the replacement or reduction in the use of the platinum-group metals.

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