Pt Nanoclusters Supported on Ti3C2Tx Nanosheets for the Selective Hydrogenation of Halogenated Nitroarenes under Mild Conditions DOI

Xiangbin Li,

Wei Gao, Lu Li

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(12), P. 14540 - 14548

Published: June 7, 2024

We successfully constructed an ultrathin Ti3C2Tx supported Pt nanocluster catalyst for highly selective and efficient hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CAN) under mild conditions (30 °C, 0.1 MPa H2). The Pt/Ti3C2Tx displayed a very high conversion (>99%) selectivity (>99%). In addition, higher reaction rate (41 mol h–1 g–1) was obtained in comparison with the previously reported catalysts. excellent catalytic activity attributed strong metal–support interactions between nanoclusters support, which electrons were transferred from sites, affording electron density active sites. Moreover, electrostatic repulsion C–Cl moiety sites inhibited dechlorination process. also exhibited performance substrate scope (reducible heterocyclics such as pyridine phthalimide), stability (10th cycles, >99% 98%), gram-scale (99% yield, 1.89 g). This work will promote research constructing noble metal-based catalysts halogenated nitroarenes.

Language: Английский

The Conundrum of “Pair Sites” in Langmuir–Hinshelwood Reaction Kinetics in Heterogeneous Catalysis DOI Creative Commons
Daniyal Kiani, Israel E. Wachs

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(13), P. 10260 - 10270

Published: June 21, 2024

Understanding reaction kinetics is crucial for designing and applying heterogeneous catalytic processes in chemical energy conversion. Here, we revisit the Langmuir–Hinshelwood (L-H) kinetic model bimolecular surface reactions, originally formulated metal catalysts, assuming immobile adsorbates on neighboring pair sites, with rate varying linearly density of sites (sites per unit area); r ∝ [*]o1. Supported oxide however, offer systematic control over [*]o through variation active two-dimensional loading submonolayer region. Various reactions catalyzed by supported oxides are analyzed, such as VOx including methanol oxidation, oxidative dehydrogenation propane ethane, SO2 oxidation to SO3, propene acrolein, n-butane maleic anhydride, selective reduction nitric ammonia. The analysis reveals diverse dependencies these [*]on, where n equals 1 a unimolecular rate-determining step 2 those rate-limiting or exchange more than electrons. We propose refraining from priori assumptions about nature adsorbate behavior, advocating instead data-driven elucidation based coverage, etc. Additionally, recent studies mechanisms have shed light nonadjacent catalyzing contrast traditional requirement adjacent/pair sites. These findings underscore need nuanced approach modeling catalysis, especially encouraging reliance experimental data idealized that often difficult justify.

Language: Английский

Citations

10
Influence of Anion in Tuning of the Crystal Structure, Optical and Redox Properties of Ce3+/4+-Based Materials DOI
Anees A. Ansari, Ruichan Lv,

Shafiya Mohammad

et al.

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

2
Practical and scalable hydrogenation of nitro compounds using palladium-based nanocatalyst under ambient conditions DOI

Venkateswarlu Vakati,

Vishakha Goyal, Ahmad S. Alshammari

et al.

Catalysis Today, Journal Year: 2024, Volume and Issue: 442, P. 114940 - 114940

Published: July 11, 2024

Language: Английский

Citations

3
Sequential hydrogenation enhanced by bidirectional hydrogen spillover over cascade catalyst DOI Open Access

Shuai Wang,

Daowei Gao, Rongyao Wang

et al.

AIChE Journal, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Abstract Formulating a synergetic strategy to govern the catalytic function of dual metal sites is paramount achieving precise control cascade reactions. Herein, we construct dual‐site catalyst with Pt and Ru species localized in micropores mesopores zeolite, respectively. This architecture enables spatial separation nanoscale proximity. Compared mono/bi‐metallic catalysts, this 4.4–9.5 times enhancement activity during sequential hydrogenation nitroaromatics cyclohexylamine. Particularly, bidirectional hydrogen spillover assists between confirmed, where active migrates from less adjacent first/second step reaction. Characterization studies density functional theory calculations suggest that enhances coverage at for each step, thereby reducing energy barrier rate‐controlling step. intriguing phenomenon reveals mechanism accelerated presents an opportunity devising immensely efficient catalysts.

Language: Английский

Citations

0
Modulation of active site in CePO4/PtCo via multiple synergistic effects for enhanced nitroaromatic hydrogenation DOI

Shuai Wang,

Zhenshuai Wu,

Changxu Wang

et al.

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 695, P. 137776 - 137776

Published: May 2, 2025

Language: Английский

Citations

0
Harnessing Phase-Dependent Acidity and Redox Activity of Ru-Decorated CePO4 Catalysts for Biofuel Production from Lignin Model Compounds and Lignin Bio-oil DOI
Atul Kumar, Rajendra Srivastava

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Language: Английский

Citations

0
Coordinating cracking and hydrogenation of polyethylene waste via acid-metal site isolation for selective hydrocarbon production DOI
Weichen Wang, Shuai Wang, Wenjing Li

et al.

Chemical Engineering Science, Journal Year: 2025, Volume and Issue: unknown, P. 121882 - 121882

Published: May 1, 2025

Language: Английский

Citations

0
One-Pot Synthesis of Magnetic Core-Shell Fe3O4@C Nanospheres with Pt Nanoparticle Immobilization for Catalytic Hydrogenation of Nitroarenes DOI Creative Commons

Jun Qiao,

Yang Gao, Kai Zheng

et al.

Applied Sciences, Journal Year: 2025, Volume and Issue: 15(10), P. 5773 - 5773

Published: May 21, 2025

Magnetic materials with intriguing structural and functional modifications demonstrate broad application potential in various fields, including drug delivery, absorption, extraction, separation, catalysis. In particular, the catalytic hydrogenation of functionalized organic nitro compounds represents a significant research focus contemporary catalysis studies. A facile synthesis Fe3O4@C–Pt core-shell nanocatalysts was developed this work through sequential process involving (1) one-pot hydrothermal followed by N2-annealing to obtain Fe3O4@C core (2) subsequent solvothermal deposition platinum nanoparticles. Comprehensive characterization performed using FT-IR, XRD, Raman spectroscopy, TEM, XPS, BET surface area analysis, TGA, VSM techniques. The resulting magnetic exhibited uniformly dispersed Pt nanoparticles demonstrated exceptional performance nitroarene reactions. Remarkably, system showed excellent group tolerance across all 20 substituted nitroarenes, consistently yielding corresponding aromatic amine products >93% conversion efficiency. Furthermore, responsiveness enabled convenient catalyst recovery simple maintained activity over 10 consecutive reuse cycles without degradation.

Language: Английский

Citations

0
Pt Nanoclusters Supported on Ti3C2Tx Nanosheets for the Selective Hydrogenation of Halogenated Nitroarenes under Mild Conditions DOI

Xiangbin Li,

Wei Gao, Lu Li

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(12), P. 14540 - 14548

Published: June 7, 2024

We successfully constructed an ultrathin Ti3C2Tx supported Pt nanocluster catalyst for highly selective and efficient hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CAN) under mild conditions (30 °C, 0.1 MPa H2). The Pt/Ti3C2Tx displayed a very high conversion (>99%) selectivity (>99%). In addition, higher reaction rate (41 mol h–1 g–1) was obtained in comparison with the previously reported catalysts. excellent catalytic activity attributed strong metal–support interactions between nanoclusters support, which electrons were transferred from sites, affording electron density active sites. Moreover, electrostatic repulsion C–Cl moiety sites inhibited dechlorination process. also exhibited performance substrate scope (reducible heterocyclics such as pyridine phthalimide), stability (10th cycles, >99% 98%), gram-scale (99% yield, 1.89 g). This work will promote research constructing noble metal-based catalysts halogenated nitroarenes.

Language: Английский

Citations

2