scholarly journals Enhanced catalyst selectivity in the direct synthesis of H2O2 through Pt incorporation into TiO2 supported AuPd catalysts

2020 ◽  
Vol 10 (14) ◽  
pp. 4635-4644 ◽  
Author(s):  
Xiaoxiao Gong ◽  
Richard J. Lewis ◽  
Song Zhou ◽  
David J. Morgan ◽  
Thomas E. Davies ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Catalytic Performance ◽  
Catalyst Selectivity ◽  
Low Levels

The introduction of low levels of Pt dopant into AuPd nanoparticles supported on TiO2 significantly enhances their catalytic performance for the direct synthesis of H2O2.

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.

Direct synthesis, characterization and catalytic performance of Al-SBA-15 mesoporous catalysts with varying Si/Al molar ratios

2012 ◽  
Vol 20 (3) ◽  
pp. 539-546 ◽  
Author(s):  
Xiucheng Zheng ◽  
Beibei Dong ◽  
Chengyuan Yuan ◽  
Ke Zhang ◽  
Xiangyu Wang
Keyword(s):  
Direct Synthesis ◽  
Catalytic Performance ◽  
Mesoporous Catalysts ◽  
Molar Ratios

scholarly journals Hierarchical H-ZSM5 zeolites based on natural kaolinite as a high-performance catalyst for methanol to aromatic hydrocarbons conversion

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ahmad Asghari ◽  
Mohammadreza Khanmohammadi Khorrami ◽  
Sayed Habib Kazemi
Keyword(s):  
Pore Size ◽  
Aromatic Hydrocarbons ◽  
High Performance ◽  
Low Cost ◽  
Direct Synthesis ◽  
Fixed Bed ◽  
Methanol Conversion ◽  
Catalytic Performance ◽  
Fixed Bed Reactor ◽  
Good Prospect

AbstractThe present work introduces a good prospect for the development of hierarchical catalysts with excellent catalytic performance in the methanol to aromatic hydrocarbons conversion (MTA) process. Hierarchical H-ZSM5 zeolites, with a tailored pore size and different Si/Al ratios, were synthesized directly using natural kaolin clay as a low-cost silica and aluminium resource. Further explored for the direct synthesis of hierarchical HZSM-5 structures was the steam assisted conversion (SAC) with a cost-effective and green affordable saccharide source of high fructose corn syrup (HFCS), as a secondary mesopore agent. The fabricated zeolites exhibiting good crystallinity, 2D and 3D nanostructures, high specific surface area, tailored pore size, and tunable acidity. Finally, the catalyst performance in the conversion of methanol to aromatic hydrocarbons was tested in a fixed bed reactor. The synthesized H-ZSM5 catalysts exhibited superior methanol conversion (over 100 h up to 90%) and selectivity (over 85%) in the methanol conversion to aromatic hydrocarbon products.

One-pot synthesis of carbon-coated Fe3O4 nanoparticles with tunable size for production of gasoline fuels

2018 ◽  
Vol 42 (13) ◽  
pp. 10861-10867 ◽  
Author(s):  
Junling Tu ◽  
Jiaojiao Yuan ◽  
Shimin Kang ◽  
Yongjun Xu ◽  
Tiejun Wang
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Direct Synthesis ◽  
Catalytic Performance ◽  
One Pot ◽  
One Pot Synthesis ◽  
Carbon Coated ◽  
Excellent Catalytic Performance

Fe3O4@C nanoparticles with tunable size exhibit excellent catalytic performance in the direct synthesis of gasoline fuels.

Direct synthesis of mesoporous H 3 PMo 12 O 40 /SiO 2 and its catalytic performance in oxidative desulfurization of fuel oil

Fuel ◽  
2015 ◽  
Vol 147 ◽  
pp. 195-202 ◽  
Author(s):  
Jianghua Qiu ◽  
Guanghui Wang ◽  
Yuqin Zhang ◽  
Danlin Zeng ◽  
Yang Chen
Keyword(s):  
Direct Synthesis ◽  
Oxidative Desulfurization ◽  
Catalytic Performance ◽  
Fuel Oil

Direct synthesis of DME over bifunctional catalyst: surface properties and catalytic performance

2003 ◽  
Vol 252 (2) ◽  
pp. 243-249 ◽  
Author(s):  
Kunpeng Sun ◽  
Weiwei Lu ◽  
Fengyan Qiu ◽  
Shuwen Liu ◽  
Xianlun Xu
Keyword(s):  
Surface Properties ◽  
Catalyst Surface ◽  
Direct Synthesis ◽  
Bifunctional Catalyst ◽  
Catalytic Performance

scholarly journals Synthesis of DME by CO2 hydrogenation over La2O3-modified CuO-ZnO-ZrO2/HZSM-5 catalysts

2017 ◽  
Vol 23 (1) ◽  
pp. 49-56 ◽  
Author(s):  
Yajing Zhang ◽  
Yu Zhang ◽  
Fu Ding ◽  
Kangjun Wang ◽  
Wang Xiaolei ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Direct Synthesis ◽  
Catalytic Performance ◽  
Co2 Hydrogenation ◽  
Precipitation Method ◽  
X Ray ◽  
Temperature Programmed ◽  
And Performance ◽  
Co Precipitation ◽  
Adsorption Desorption

A series of La2O3-modified CuO-ZnO-ZrO2/HZSM-5 catalysts were prepared by an oxalate co-precipitation method. The catalysts were fully characterized by X-ray diffraction (XRD), N2 adsorption-desorption, hydrogen temperature pro-grammed reduction (H2-TPR), ammonia temperature programmed desorption (NH3-TPD), and X-ray photoelectron spectroscopy (XPS) techniques. The effect of the La2O3 content on the structure and performance of the catalysts was thoroughly investigated. The catalysts were evaluated for the direct synthesis of dimethyl ether (DME) from CO2 hydrogenation. The results displayed that La2O3 addition enhanced catalytic performance, and the maximal CO2 conversion (34.3%) and DME selectivity (57.3%) were obtained over the catalyst with 1% La2O3, which due to the smaller size of Cu species and a larger ratio of Cu+/Cu.

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