Enhanced Photocatalytic Performance of Cerium Metal-Organic Frameworks

Strategic Insights -

Researchers at the Hefei University of Technology in Anhui, People's Republic of China, have made significant breakthroughs in the development of cerium metal-organic frameworks (MOFs) for photocatalytic applications. By integrating modification strategies with the precious metal palladium, the researchers have achieved superior photocatalytic performance compared to other materials in the family of MOFs. This advancement has significant implications for the efficient conversion of carbon dioxide into valuable chemicals.

Key Takeaways:

  • The researchers have developed a novel three-dimensional palladium-porphyrin cerium metal-organic framework (Pd-Ce PMOFs) that uniformly encapsulates Pd through stable N-Pd coordination bonds, addressing the issues of uneven dispersion and instability found in palladium-modified photocatalysts.
  • The optimized Pd-Ce PMOFs exhibited excellent photocatalytic performance for carbon dioxide reduction, achieving a CO yield of 191.24 ± 3 mmol g h, which was 3.81 times higher than that of the original Ce PMOFs, with a selectivity of 98.13 %.
  • Density functional theory (DFT) calculations indicated that Pd served as a dual active site for the adsorption of carbon dioxide and its catalytic activation, reducing the energy barrier to 1.59 eV for the formation of the *COOH intermediate and facilitating efficient carrier migration.
  • This work pioneers a stable three-dimensional Ce-Pd PMOFs structure and promotes the use of palladium coordination modifications, advancing the rational design of high-performance MOF-based photocatalysts for sustainable CO conversion.
  • The research has been peer-reviewed and published in the Journal of Colloid and Interface Science.

Statistics:

  • The optimized Pd-Ce PMOFs exhibited a CO yield of 191.24 ± 3 mmol g h.
  • The selectivity of the CO yield was 98.13 %.
  • The energy barrier for the formation of the *COOH intermediate was reduced to 1.59 eV.
  • The CO yield was 3.81 times higher than that of the original Ce PMOFs.

Sources:

  • Coordination immobilization of palladium ions in the novel three-dimensional cerium porphyrin metal-organic framework for enhanced photocatalytic carbon dioxide reduction. Journal of Colloid and Interface Science, 2025; 700: 138528.
  • Research authors: Zhiquan Cai, Yuxuan Qi, Yi-Si Feng, Junru Wang, Zhenhong Dai, and Zhifei Cheng.