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Catalysis

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The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.

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Updated: Jul 28, 2025

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

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Published on: October 18, 2019

Methane Activation by [OsC₃]⁺: Implications for Catalyst Design.

Shihan Li¹, Xiao-Nan Wu², Shaodong Zhou^1,3

¹College of Chemical and Biological Engineering, Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, Zhejiang University, Hangzhou 310027, P. R. China.

The Journal of Physical Chemistry Letters

|June 1, 2023

Summary

This summary is machine-generated.

The reactivity of osmium carbide clusters ([OsC3]+) in methane activation is primarily driven by cluster polarity. Tuning catalyst polarity can minimize unwanted byproducts in gas-phase reactions.

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Area of Science:

Organometallic Chemistry
Catalysis
Computational Chemistry

Background:

Osmium carbide clusters ([OsC3]+) are investigated for their potential in methane activation.
Understanding the factors governing cluster reactivity is crucial for catalyst design.

Purpose of the Study:

To investigate the gas-phase reactions of [OsC3]+ with methane.
To elucidate the electronic and structural factors influencing the reactivity and product distribution of osmium carbide clusters.

Main Methods:

Quadrupole-ion trap mass spectrometry was employed to study gas-phase reactions.
Quantum chemical calculations were utilized to analyze electronic features and reaction mechanisms.

Main Results:

Cluster polarity was identified as the fundamental driver for methane activation by [OsC3]+.
Electronic features like molecular polarity index, charge/spin distribution, and HOMO-LUMO gap significantly influence reactivity.
Ligand variation can lead to either multiple products or a single product, indicating tunable selectivity.

Conclusions:

The polarity of osmium carbide clusters dictates their reactivity in methane activation.
Reducing local polarity at the catalyst active site offers a strategy to minimize byproduct formation.