Journal
SMALL STRUCTURES
Volume 3, Issue 5, Pages -Publisher
WILEY
DOI: 10.1002/sstr.202100071
Keywords
metal-organic frameworks; photoelectrochemical water splitting; surface plasmon resonance
Funding
- China National Natural Science Fund [22004002]
- Natural Science Foundation of Anhui Province [2008085QB80]
- Open Funds of the State Key Laboratory of Electroanalytical Chemistry [SKLEAC202103]
- Open Fund of Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application [LFCCMCA-10]
- Anhui Polytechnic University [2019YQQ016]
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This study designed a plasmon-enhanced catalyst by integrating metal-organic frameworks (MOFs)-derived Cd0.8Zn0.2S with Ag/Au hollow porous nanoshells (Ag/Au HPNSs), which extends the spectral absorption range and improves the performance of photoelectrochemical (PEC) water splitting. Theoretical simulations showed that MOFs-derived Cd0.8Zn0.2S with a high dielectric constant can prevent the decay of plasmon fringing field and enhance charge separation efficiency.
Water splitting through photoelectrochemical (PEC) catalytic reaction holds significant promise for energy conversion. However, the low energy-storage efficiency severely hinders the practical applications owing to the narrow spectral absorption and adverse charge recombination. Herein, a plasmon-enhanced catalyst, integrating metal-organic frameworks (MOFs)-derived Cd0.8Zn0.S-2 with Ag/Au hollow porous nanoshells (Ag/Au HPNSs), is rationally designed to afford Ag/Au HPNS-Cd0.8Zn0.2S nanoshells (Ag/Au HPNS-Cd0.8Zn0.2S NSs), which extends the absorption range from the ultraviolet to the near-infrared region. The PEC performance shows that the photocurrent of the anode exhibits an approx. tenfold enhancement and full spectral response compared with the intrinsic ZIF-8 dodecahedrons. More detailed exploration and theoretical simulations find that the MOFs-derived Cd0.8Zn0.2S, with a high dielectric constant, can markedly prevent the decay of the plasmon fringing field and broaden the interaction range of the electromagnetic field. Such a synergistic effect finally improves the charge separation efficiency and results in the superior PEC performance of the photoanode. This work offers a new method for the construction of efficient PEC catalysts and provides new insights into the understanding of the plasmonic effect on catalytic reactions.
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