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Related Experiment Video

Updated: Jun 24, 2025

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Published on: August 30, 2024

Low-Temperature Methane Activation Reaction Pathways over Mechanochemically-Generated Ce⁴⁺/Cu⁺ Interfacial Sites.

Silvia Mauri¹, Rudy Calligaro², Carlo Federico Pauletti³

¹TASC Laboratory, CNR- Istituto Officina dei Materiali, Trieste, 34149, Italy.

Small (Weinheim an Der Bergstrasse, Germany)

|June 11, 2024

Summary

Ball milling creates unique CeO2/CuO interfaces, enabling methane activation at low temperatures (250°C) and producing valuable partial oxidation products. This mechanical approach optimizes heterogeneous catalysis for methane valorization.

Keywords:

Operando heterogeneous catalysis mechanochemistry methane spectroscopy

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

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

Published on: October 18, 2019

Area of Science:

Heterogeneous catalysis
Materials science
Chemical engineering

Background:

Methane valorization is crucial for sustainable energy.
Developing efficient catalysts for methane activation remains a significant challenge.
Conventional catalyst preparation methods often yield limited performance.

Purpose of the Study:

To investigate methane activation using a novel CeO2/CuO composite.
To explore the low-temperature catalytic performance of ball-milled catalysts.
To elucidate the structure-activity relationship responsible for enhanced methane conversion.

Main Methods:

Preparation of CeO2/CuO composite via ball milling.
In situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS).
Operando Near Edge X-Ray Absorption Fine Structure Spectroscopy (NEXAFS).
Density Functional Theory (DFT) modeling.

Main Results:

Methane activation achieved at a low temperature of 250°C.
Observation of partial oxidation products: methanol and formaldehyde.
Identification of Ce4+/Cu+ interfaces formed by redox exchange during milling.
Confirmation of a charge transfer mechanism via DFT calculations.

Conclusions:

Ball milling effectively creates unique and resilient CeO2/CuO interfaces.
These interfaces enhance methane activation and partial oxidation.
The mechanical approach offers a distinct strategy for catalyst optimization in methane valorization.