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Citation: Haibo NING, Qingkun KONG. Cs2PdBr6 microcrystals: Femtosecond transient absorption spectroscopy analysis and photocatalytic CO2 reduction performance[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(10): 2179-2185. doi: 10.11862/CJIC.20260068 shu

Cs2PdBr6 microcrystals: Femtosecond transient absorption spectroscopy analysis and photocatalytic CO2 reduction performance

  • 1.

    Assets Management Department, Qufu Normal University, Qufu, Shandong 273165, China

  • 2.

    School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, China

Figures(6)

  • Cs2PdBr6 microcrystals with a uniform grain size of approximately 1.3 μm were successfully prepared via a solvothermal route. Femtosecond transient absorption spectroscopy was utilized to clarify the ultrafast carrier relaxation behavior and dynamic mechanism of the obtained Cs2PdBr6 photocatalyst. The transient kinetic curves can be well fitted with three characteristic decay components. The ultrafast component (2.1 ps) is assigned to carrier trapping, which is primarily associated with abundant surface defect states. The intermediate component (853.8 ps) is attributed to the intrinsic radiative recombination of photogenerated electron-hole pairs. The slow component (4.1 ns) is ascribed to defect-mediated carrier relaxation, which prolongs the carrier lifetime by effectively suppressing radiative recombination. These results demonstrate the critical role of defect states in regulating carrier dynamics and promoting charge separation in Cs2PdBr6. Benefiting from the optimized carrier dynamics, the Cs2PdBr6 microcrystals exhibited excellent photocatalytic CO2 reduction performance, achieving CO and CH4 evolution rates of 14.4 and 1.5 μmol·g-1·h-1, respectively.
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    1. [1]

      ZHANG J J, ZHU B C, ZHANG L Y, YU J G. Femtosecond transient absorption spectroscopy investigation into the electron transfer mechanism in photocatalysis[J]. Chem. Commun., 2023, 59(6): 688-699  doi: 10.1039/D2CC06300J

    2. [2]

      BERERA R, van GRONDELLE R, KENNIS J T M. Ultrafast transient absorption spectroscopy: Principles and application to photosynthetic systems[J]. Photosynth. Res., 2009, 101(2): 105-118

    3. [3]

      LORENC M, ZIOLEK M, NASKRECKI R, KAROLCZAK J, KUBICK I J, MACIEJEWSKI A. Artifacts in femtosecond transient absorption spectroscopy[J]. Appl. Phys. B‒Lasers Opt., 2002, 74(1): 19-27  doi: 10.1007/s003400100750

    4. [4]

      YAN J T, ZHANG J J. Charge transfer kinetic analysis of S-scheme heterojunction by femtosecond transient absorption spectrum[J]. J. Mater. Sci. Technol., 2024, 193: 18-21  doi: 10.1016/j.jmst.2023.12.054

    5. [5]

      LI D, He X X, ZHANG X L, CHEN J Q, JIN Q Y, XU J H. Investigating ultrafast electron transfer in graphene and its derivatives composites by femtosecond transient absorption spectroscopy[J]. ChemPhotoChem, 2024, 8(7): e202300271  doi: 10.1002/cptc.202300271

    6. [6]

      TONG X N, SHOU J X, SONG H, WANG Y L, HUANG L, YIN L S. Ultrafast electron transfer from crystalline g-C3N4 to Pt revealed by femtosecond transient absorption spectroscopy[J]. Energy Fuels, 2022, 36(19): 11532-11541  doi: 10.1021/acs.energyfuels.2c01365

    7. [7]

      CAI J J, LIU B W, ZHANG S M, WANG L X, WU Z, ZHANG J J, CHENG B. ZnIn2S4/MOF S-scheme photocatalyst for H2 production and its femtosecond transient absorption mechanism[J]. J. Mater. Sci. Technol., 2024, 197: 183-193  doi: 10.1016/j.jmst.2024.02.012

    8. [8]

      GHASEMI M, LU J L, JIA B H, WEN X M. Steady state and transient absorption spectroscopy in metal halide perovskites[J]. Chem. Soc. Rev., 2025, 54(4): 1644-1683  doi: 10.1039/D4CS00985A

    9. [9]

      WANG Y N, LIU J X, LIU Y J, LI S P, XU X L, LOU Z D. Recent advances in lead-free halide perovskites: From synthesis to applications[J]. J. Mater. Chem. C, 2024, 12(28): 10267-10329  doi: 10.1039/D4TC01556H

    10. [10]

      SAKAI N, HAGHIGHIRAD A A, FILIP M R, NAYAK P K, NAYAK S, RAMADAN A, WANG Z P, GIUSTINO F, SNAITH H J. Solution-processed cesium hexabromopalladate(Ⅳ), Cs2PdBr6, for optoelectronic applications[J]. J. Am. Chem. Soc., 2017, 139(17): 6030-6033  doi: 10.1021/jacs.6b13258

    11. [11]

      WU D F, WANG C, HUO B J, HU K, MAO X C, GENG Z G, HUANG Q, ZHANG W X, ZENG J, TANG X S. Photo-and electrocatalytic CO2 reduction based on stable lead‑free perovskite Cs2PdBr6[J]. Energy Environ. Mater., 2023, 6(5): e12411  doi: 10.1002/eem2.12411

    12. [12]

      SCHOLZ M, MORGENROTH M, MERKER A, OUM K, LENZER T. Ultrafast carrier dynamics and electrical properties of the palladium-based vacancy-ordered perovskite Cs2PdBr6[J]. J. Phys. Chem. C, 2023, 127(36): 17871-17879  doi: 10.1021/acs.jpcc.3c04001

    13. [13]

      GAO L Q, WU D F, HUANG Y Y, ZHANG W X, LIU Y F, TANG X S. Morphology-defect synergy in Cs2PdBr6 perovskite nanocrystals for enhanced photocatalytic CO2-to-CO conversion[J]. eScience, 2026, 6(4): 100508  doi: 10.1016/j.esci.2025.100508

    14. [14]

      MEI H, WANG Z Y, ZHAI Y, ZHU Q Q, WANG L, LIANG P. Understanding the effect of intrinsic defects in lead-free vacancy-ordered double perovskites Cs2PdBr6[J]. J. Phys. Chem. C, 2022, 126(42): 17875-17884  doi: 10.1021/acs.jpcc.2c05882

    15. [15]

      ZHOU L, LIAO J F, HUANG Z G, WANG X D, XU Y F, CHEN H Y, KUANG D B, SU C Y. All-inorganic lead-free Cs2PdX6 (X=Br, I) perovskite nanocrystals with single unit cell thickness and high stability[J]. ACS Energy Lett., 2018, 3(10): 2613-2619  doi: 10.1021/acsenergylett.8b01770

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