A Facile Approach to Tune WOx Species Combining Pt Catalyst for Enhanced Catalytic Performance in Glycerol Hydrogenolysis

2021 ◽  
Author(s):  
Binbin Zhao ◽  
Yu Liang ◽  
Wenjun Yan ◽  
Lei Liu ◽  
Jinxiang Dong
Keyword(s):  
Catalytic Performance ◽  
Pt Catalyst ◽  
Glycerol Hydrogenolysis

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.

Study of the CA-treated ZSM-22 zeolite with enhanced catalytic performance in the hydroisomerization of long-chain n-dodecane

2021 ◽  
Author(s):  
Liwen He ◽  
Wenqian Fu ◽  
Leyi Li ◽  
Yuxian Huang ◽  
Liyu Chen ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Molar Concentration ◽  
Pt Catalyst ◽  
Long Chain

In this study, Pt catalyst on series of ZSM-22 zeolites treated by citric (CA) solution with different molar concentration (Pt/ZSM-22-CA-x, x=0,1, 2, and 3) was prepared, and evaluated in the...

scholarly journals Tuning the Reaction Selectivity over MgAl Spinel-Supported Pt Catalyst in Furfuryl Alcohol Conversion to Pentanediols

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 415
Author(s):  
Xinsheng Li ◽  
Jifeng Pang ◽  
Jingcai Zhang ◽  
Xianquan Li ◽  
Yu Jiang ◽  
...  
Keyword(s):  
Furfuryl Alcohol ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Major Product ◽  
Pt Catalyst ◽  
Reaction Products ◽  
Strong Base ◽  
Reaction Selectivity ◽  
Supported Pt Catalysts ◽  
Alcohol Conversion

Catalytic conversion of biomass-derived feedstock to high-value chemicals is of remarkable significance for alleviating dependence on fossil energy resources. MgAl spinel-supported Pt catalysts were prepared and used in furfuryl alcohol conversion. The approaches to tune the reaction selectivity toward pentanediols (PeDs) were investigated and the catalytic performance was correlated to the catalysts’ physicochemical properties based on comprehensive characterizations. It was found that 1–8 wt% Pt was highly dispersed on the MgAl2O4 support as nanoparticles with small sizes of 1–3 nm. The reaction selectivity did not show dependence on the size of Pt nanoparticles. Introducing LiOH onto the support effectively steered the reaction products toward the PeDs at the expense of tetrahydrofurfuryl alcohol (THFA) selectivity. Meanwhile, the major product in PeDs was shifted from 1,5-PeD to 1,2-PeD. The reasons for the PeDs selectivity enhancement were attributed to the generation of a large number of medium-strong base sites on the Li-modified Pt catalyst. The reaction temperature is another effective factor to tune the reaction selectivity. At 230 °C, PeDs selectivity was enhanced to 77.4% with a 1,2-PeD to 1,5-PeD ratio of 3.7 over 4Pt/10Li/MgAl2O4. The Pt/Li/MgAl2O4 catalyst was robust to be reused five times without deactivation.

scholarly journals Platinum–copper single atom alloy catalysts with high performance towards glycerol hydrogenolysis

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Xi Zhang ◽  
Guoqing Cui ◽  
Haisong Feng ◽  
Lifang Chen ◽  
Hui Wang ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Reaction Pathway ◽  
Theoretical Calculations ◽  
Experimental Studies ◽  
Value Added ◽  
Catalytic Performance ◽  
Single Atom ◽  
Glycerol Hydrogenolysis ◽  
Single Atom Alloy

AbstractSelective hydrogenolysis of biomass-derived glycerol to propanediol is an important reaction to produce high value-added chemicals but remains a big challenge. Herein we report a PtCu single atom alloy (SAA) catalyst with single Pt atom dispersed on Cu nanoclusters, which exhibits dramatically boosted catalytic performance (yield: 98.8%) towards glycerol hydrogenolysis to 1,2-propanediol. Remarkably, the turnover frequency reaches up to 2.6 × 103 molglycerol·molPtCu–SAA−1·h−1, which is to our knowledge the largest value among reported heterogeneous metal catalysts. Both in situ experimental studies and theoretical calculations verify interface sites of PtCu–SAA serve as intrinsic active sites, in which the single Pt atom facilitates the breakage of central C–H bond whilst the terminal C–O bond undergoes dissociation adsorption on adjacent Cu atom. This interfacial synergistic catalysis based on PtCu–SAA changes the reaction pathway with a decreased activation energy, which can be extended to other noble metal alloy systems.

scholarly journals Magnetic Fe2O3–SiO2–MeO2–Pt (Me = Ti, Sn, Ce) as Catalysts for the Selective Hydrogenation of Cinnamaldehyde. Effect of the Nature of the Metal Oxide

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 413 ◽  
Author(s):  
Robinson Dinamarca ◽  
Rodrigo Espinoza-González ◽  
Cristian Campos ◽  
Gina Pecchi
Keyword(s):  
Metal Oxide ◽  
Continuous Production ◽  
Catalytic Performance ◽  
Structure Design ◽  
Pt Catalyst ◽  
Full Characterization ◽  
Magnetic Cores ◽  
Homogeneous Core ◽  
The Mean ◽  
Nanoparticle Sizes

The type of metal oxide affects the activity and selectivity of Fe2O3–SiO2–MeO2–Pt (Me = Ti, Sn, Ce) catalysts on the hydrogenation of cinnamaldehyde. The double shell structure design is thought to protect the magnetic Fe2O3 cores, and also act as a platform for depositing a second shell of TiO2, SnO2 or CeO2 metal oxide. To obtain a homogeneous metallic dispersion, the incorporation of 5 wt % of Pt was carried out over Fe2O3–SiO2–MeO2 (Me = Ti, Sn, Ce) structures modified with (3-aminopropyl)triethoxysilane by successive impregnation-reduction cycles. The full characterization by HR-TEM, STEM-EDX, XRD, N2 adsorption isotherm at −196 °C, TPR-H2 and VSM of the catalysts indicates that homogeneous core-shell structures with controlled nano-sized magnetic cores, multi-shells and metallic Pt were obtained. The nature of the metal oxide affects the Pt nanoparticle sizes where the mean Pt diameter is in the order: –TiO2–Pt > –SnO2–Pt > –CeO2–Pt. Among the catalysts studied, –CeO2–Pt had the best catalytic performance, reaching the maximum of conversion at 240 min. of reaction without producing hydrocinnamaldehyde (HCAL). It also showed a plot volcano type for the production of cinnamic alcohol (COL), with 3-phenyl-1-propanol (HCOL) as a main product. The –SnO2–Pt catalyst showed a poor catalytic performance attributable to the Pt clusters’ occlusion in the irregular surface of the –SnO2. Finally, the –TiO2–Pt catalyst showed a continuous production of COL with a 100% conversion and 65% selectivity at 600 min of reaction.

Promoting Role of Oxygen Deficiency on a WO3-Supported Pt Catalyst for Glycerol Hydrogenolysis to 1,3-Propanediol

2020 ◽  
Vol 59 (16) ◽  
pp. 7389-7397 ◽  
Author(s):  
Yufeng Niu ◽  
Binbin Zhao ◽  
Yu Liang ◽  
Lei Liu ◽  
Jinxiang Dong
Keyword(s):  
Oxygen Deficiency ◽  
Pt Catalyst ◽  
Glycerol Hydrogenolysis ◽  
Supported Pt Catalyst

scholarly journals Influence of pretreatment on the catalytic performance of Ru/SBA-15 catalysts for glycerol hydrogenolysis

2014 ◽  
Vol 35 (5) ◽  
pp. 677-683 ◽  
Author(s):  
Yuming Li ◽  
Lan Ma ◽  
Huimin Liu ◽  
Dehua He
Keyword(s):  
Catalytic Performance ◽  
Glycerol Hydrogenolysis

A facile Pt catalyst regeneration process significantly improves the catalytic activity of Pt–organic composites for the O2 reduction reaction

2015 ◽  
Vol 51 (60) ◽  
pp. 12052-12055 ◽  
Author(s):  
Jing-Fang Huang ◽  
Wen-Yu Chen
Keyword(s):  
Catalytic Activity ◽  
Size Effect ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Pt Catalyst ◽  
O2 Reduction ◽  
Organic Composites ◽  
Acidic Conditions ◽  
Nano Size ◽  
Complexation Ability

Combination of the “nano-size” effect and Cl− complexation ability causes massive electrodissolution of Pt under acidic conditions to promote the regeneration of Pt–organic composites and to significantly improve the catalytic performance of the O2 reduction reaction.

Catalytic performance of Pt/AlPO4catalysts for selective hydrogenolysis of glycerol to 1,3-propanediol in the vapour phase

RSC Advances ◽  
2014 ◽  
Vol 4 (94) ◽  
pp. 51893-51903 ◽  
Author(s):  
Samudrala Shanthi Priya ◽  
Vanama Pavan Kumar ◽  
Mannepalli Lakshmi Kantam ◽  
Suresh K. Bhargava ◽  
Komandur V. R. Chary
Keyword(s):  
Vapour Phase ◽  
Catalytic Performance ◽  
Glycerol Hydrogenolysis ◽  
Selective Hydrogenolysis

Glycerol hydrogenolysis to 1,3-propanediol over Pt/AlPO4catalysts.

Discovering positively charged Pt for enhanced hydrogenolysis of glycerol to 1,3-propanediol

2020 ◽  
Vol 22 (23) ◽  
pp. 8254-8259
Author(s):  
Binbin Zhao ◽  
Yu Liang ◽  
Lei Liu ◽  
Qian He ◽  
Jinxiang Dong
Keyword(s):  
Tantalum Oxide ◽  
Catalytic Performance ◽  
Atomic Level ◽  
Glycerol Hydrogenolysis ◽  
Positively Charged

WOx-stabilized Ptδ+ species in atomic-level dispersion on tantalum oxide exhibiting a remarkable catalytic performance for glycerol hydrogenolysis to 1,3-PDO.

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