Solid-solution alloying of immiscible Pt and Au boosts catalytic performance for H2O2 direct synthesis

The solid solution series CexZr(1-x-0.1)Y0.1O2 with various x values was prepared by the citric acid sol-gel method, using cerium and zirconium nitrides as precursors, respectively.The characterization results of the XRD, N2 sorption measurements indicated that the physical properties of the solid solutions were significantly affected by the x values in CexZr(1-x-0.1)Y0.1O2 and the calcination temperatures. These solid solutions can be used as catalyst for the direct synthesis of dimethyl carbonate from CH3OH and CO2. Results indicated that the catalytic activity for DMC synthesis was influenced by the structure of the solid solutions and the x values in CexZr(1-x-0.1)Y0.1O2. The optimized Ce0.5Zr0.4Y0.1O2 with bimodal pore structure exhibited higher catalytic performance to DMC synthesis.

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

npj Computational Materials ◽

10.1038/s41524-021-00605-6 ◽

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

Journal of Porous Materials ◽

10.1007/s10934-012-9626-6 ◽

2012 ◽

Vol 20 (3) ◽

pp. 539-546 ◽

Cited By ~ 13

Author(s):

Xiucheng Zheng ◽

Beibei Dong ◽

Chengyuan Yuan ◽

Ke Zhang ◽

Xiangyu Wang

Keyword(s):

Direct Synthesis ◽

Catalytic Performance ◽

Mesoporous Catalysts ◽

Molar Ratios

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Direct synthesis of mesoporous TiO2 and its catalytic performance in DBT oxidative desulfurization

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2008.04.031 ◽

2008 ◽

Vol 116 (1-3) ◽

pp. 378-385 ◽

Cited By ~ 47

Author(s):

D. Huang ◽

Y.J. Wang ◽

Y.C. Cui ◽

G.S. Luo

Keyword(s):

Direct Synthesis ◽

Oxidative Desulfurization ◽

Catalytic Performance ◽

Mesoporous Tio2

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Effects of surface hydroxyl groups induced by the co-precipitation temperature on the catalytic performance of direct synthesis of isobutanol from syngas

Fuel ◽

10.1016/j.fuel.2018.09.143 ◽

2019 ◽

Vol 237 ◽

pp. 1021-1028 ◽

Cited By ~ 6

Author(s):

Tao Zhang ◽

Yingquan Wu ◽

Xiaofeng Gao ◽

Hongjuan Xie ◽

Guohui Yang ◽

...

Keyword(s):

Direct Synthesis ◽

Catalytic Performance ◽

Hydroxyl Groups ◽

Surface Hydroxyl ◽

Precipitation Temperature ◽

Surface Hydroxyl Groups ◽

Co Precipitation

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

Scientific Reports ◽

10.1038/s41598-019-54089-y ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 3

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.

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Effect of second metal component on the reduction property and catalytic performance of NiO-MO /Nb2O5-TiO2 for direct synthesis of 2-propylheptanol from n-valeraldehyde

Catalysis Communications ◽

10.1016/j.catcom.2020.106209 ◽

2021 ◽

Vol 149 ◽

pp. 106209

Author(s):

Lili Zhao ◽

Hualiang An ◽

Xinqiang Zhao ◽

Yanji Wang

Keyword(s):

Direct Synthesis ◽

Catalytic Performance ◽

Metal Component ◽

Reduction Property

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Direct Synthesis of Oxynitride Nanowires through Atmospheric Pressure Chemical Vapor Deposition

Nanomaterials ◽

10.3390/nano10122507 ◽

2020 ◽

Vol 10 (12) ◽

pp. 2507

Author(s):

Babak Adeli ◽

Fariborz Taghipour

Keyword(s):

Solid Solution ◽

Vapor Deposition ◽

Atmospheric Pressure ◽

Wide Spectrum ◽

Direct Synthesis ◽

Chemical Vapor ◽

Building Blocks ◽

Operating Conditions ◽

Wide Range ◽

Pressure Chemical

Binary and ternary oxynitride solid alloys were studied extensively in the past decade due to their wide spectrum of applications, as well as their peculiar characteristics when compared to their bulk counterparts. Direct bottom-up synthesis of one-dimensional oxynitrides through solution-based routes cannot be realized because nitridation strategies are limited to high-temperature solid-state ammonolysis. Further, the facile fabrication of oxynitride thin films through vapor phase strategies has remained extremely challenging due to the low vapor pressure of gaseous building blocks at atmospheric pressure. Here, we present a direct and scalable catalytic vapor–liquid–solid epitaxy (VLSE) route for the fabrication of oxynitride solid solution nanowires from their oxide precursors through enhancing the local mass transfer flux of vapor deposition. For the model oxynitride material, we investigated the fabrication of gallium nitride and zinc oxide oxynitride solid solution (GaN:ZnO) thin film. GaN:ZnO nanowires were synthesized directly at atmospheric pressure, unlike the methods reported in the literature, which involved multiple-step processing and/or vacuum operating conditions. Moreover, the dimensions (i.e., diameters and length) of the synthesized nanowires were tailored within a wide range.

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