Breakthrough in Strain Engineering: Enhancing CO Photoreduction Yields and Selectivity

Strategic Insights -

Researchers from the University of Shanghai for Science and Technology have made a significant breakthrough in strain engineering, achieving remarkable improvements in CO photoreduction yields and selectivity. By constructing a CeO multivesicular structure modified with -OH species and compressive lattice strain, the team was able to optimize band structures, photoelectric current stability, and surface electron behavior. This innovation has the potential to significantly advance the field of photocatalytic applications.

Key Takeaways:

  • The researchers developed a CeO multivesicular structure with -OH species and compressive lattice strain (-1.92 %) through flame spray pyrolysis.
  • The synergistic effect of hydrogen bond networks and compressive lattice strain optimized band structures, photoelectric current stability, and surface electron behavior.
  • The enhancement of electron utilization rate was 5.73 times, while CO-to-CH selectivity reached 80.4 %.
  • Experimental and theoretical calculation results revealed that the formation of hydrogen bond networks by introducing -OH groups played a crucial role in improving CO photoreduction performance.
  • The research provided new insights into the design of microstructures on material surfaces for high-performance photocatalysts.
  • The transmission electron microscope (TEM) images and energy-dispersive X-ray spectroscopy (EDS) mappings were used to characterize the morphology and composition of the samples.
  • The experimental results showed that the CeO samples with -OH species and compressive lattice strain exhibited enhanced photocatalytic activity and selectivity compared to pristine CeO samples.

Statistics:

  • The electron utilization rate was enhanced by 5.73 times.
  • The CO-to-CH selectivity reached 80.4 %.
  • The photoreduction yield increased by 8.86 times.
  • The research provided 80.4 % selectivity towards CH.
  • The transmission efficiency of electrons was increased.

Sources:

  • Hydrogen-bond network mediated lattice-strain engineering for CO2-to-CH4 selectivity regulation via flame spray pyrolysis strategy. Journal of Colloid and Interface Science, 2025;703:139159.
  • Journal of Colloid and Interface Science, Academic Press Inc Elsevier Science, 525 B St, Ste 1900, San Diego, CA 92101-4495, USA.