Boosting co₂ reduction efficiency through synergistic effects of ni-CU-ZN trimetallic sites on defective ceria as a catalyst

The Ni-Cu-Zn/CeO2 trimetallic catalyst system with SMSI addresses low activity and stability issues in CO2 to CO conversion, achieving a nine-fold increase in CO productivity and sustained performance through enhanced electron density and defect-engineered ceria support.

WO2026139931A2PCT designated stage Publication Date: 2026-07-02TATA INSTITUTE OF FUNDAMENTAL RESEARCH
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TATA INSTITUTE OF FUNDAMENTAL RESEARCH
Filing Date
2025-12-27
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing catalysts for converting CO2 to CO face challenges such as low catalytic activity, instability, coking, and loss of selectivity at elevated temperatures, hindering the sustainability and efficiency of CO2 reduction processes.

Method used

A Ni-Cu-Zn/CeO2 trimetallic catalyst system with strong metal-support interactions (SMSI) is developed, leveraging defective ceria to enhance electron density distribution and stability, utilizing in-situ characterization techniques to understand the interaction dynamics and reaction mechanisms.

Benefits of technology

The catalyst achieves a remarkable CO production rate of 49,279 mmol g−1h−1at 650°C with 99% selectivity, significantly surpassing previous catalysts by addressing sintering and coking issues, and maintaining stability for over 100 hours.

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Abstract

The present invention relates to catalytic conversion of carbon dioxide (CO2) into carbon monoxide (CO). The present invention more particularly relates to Ni-Cu- Zn / CeO2 catalyst system and a catalytic process leveraging trimetallic active sites comprising nickel (Ni), copper (Cu), and zinc (Zn) deposited on defect-engineered cerium oxide (CeO₂). This innovative system enables efficient carbon dioxide reduction reaction (CO₂RR) for the conversion of CO₂ into CO. The Ni-Cu- Zn / CeO₂ catalyst has set a new standard in CO₂ conversion, delivering a remarkable CO production rate of 49,279 mmol g⁻¹ h⁻¹ at 650 °C nearly nine times higher than the reported catalyst with a 97% CO selectivity, demonstrating outstanding stability with no loss of performance after 100 hours at 550°C.
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