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Sequential Phosphorus Doping and Selective Etching: A Dual-Step Approach for CO2 Reduction Pathway Regulation in

Xiaoxu Wei1,2,3, Zijian Wang1,2,3, Qing Xie1,2,3

  • 1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.

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|December 2, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel surface modulation strategy for CO2 hydrogenation, significantly enhancing CO selectivity and catalytic activity. The new catalyst design offers a promising solution for efficient carbon emission reduction.

Keywords:
CO2 hydrogenationMethanation reactionPhosphorus dopingReverse water–gas shift reaction

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Area of Science:

  • Catalysis
  • Materials Science
  • Environmental Chemistry

Background:

  • CO2 hydrogenation is crucial for reducing carbon emissions but faces selectivity challenges.
  • Developing efficient catalysts for selective CO2 conversion remains a key research area.

Purpose of the Study:

  • To develop a novel surface modulation strategy for enhancing CO2 hydrogenation selectivity.
  • To investigate the effects of phosphorus incorporation and ascorbic acid etching on catalyst performance.

Main Methods:

  • Sequential surface modulation of CeO2 supports with phosphorus (P) incorporation.
  • Selective etching using ascorbic acid (AA).
  • Catalytic testing of Rh/CeO2-P-AA for CO2 hydrogenation.

Main Results:

  • The Rh/CeO2-P-AA catalyst achieved nearly 100% CO selectivity and a CO generation rate of 1336.3 molCO molRh-1 h-1.
  • This represents a significant improvement compared to Rh/CeO2-P and Rh/CeO2 catalysts.
  • Phosphorus incorporation altered Rh surface states, reducing CO adsorption, while AA facilitated defect creation for CO2 activation.

Conclusions:

  • The sequential dual-step surface modulation strategy effectively tunes product selectivity in CO2 hydrogenation.
  • The developed Rh/CeO2-P-AA catalyst demonstrates exceptional activity and selectivity for CO production.
  • This approach offers a pathway towards more efficient catalytic conversion of CO2 for environmental benefits.