cm9b04582_si_001.pdf (1.12 MB)
Boosting Photocatalytic CO2 Reduction on CsPbBr3 Perovskite Nanocrystals by Immobilizing Metal Complexes
journal contribution
posted on 2020-02-06, 15:38 authored by Zhoujie Chen, Yangguang Hu, Jin Wang, Qing Shen, Yaohong Zhang, Chao Ding, Yu Bai, Guocan Jiang, Zhengquan Li, Nikolai GaponikConverting
CO2 into chemical fuels with a photocatalyst
and sunlight is an appealing approach to address climate deterioration
and energy crisis. Metal complexes are superb candidates for CO2 reduction due to their tunable catalytic sites with high
activity. The coupling of metal complexes with organic photosensitizers
is regarded as a common strategy for establishing photocatalytic systems
for visible-light-driven CO2 reduction. While most of the
organic photosensitizers generally contain precious metals and are
available through onerous synthetic routes, their large-scale application
in the photocatalysis is limited. Halide perovskite nanocrystals (NCs)
have been considered as one of the most promising light-harvesting
materials to replace the organic photosensitizers due to their tunable
light absorption range, low cost, abundant surface sites, and high
molar extinction coefficient. Herein, we demonstrate a facile strategy
to immobilize [Ni(terpy)2]2+ (Ni(tpy)) on inorganic
ligand-capped CsPbBr3 NCs and to apply this hybrid as a
catalyst for visible-light-driven CO2 reduction. In this
hybrid photocatalytic system, the Ni(tpy) can provide specific catalytic
sites and serve as electron sinks to suppress electron–hole
recombination in the CsPbBr3 NCs. The CsPbBr3-Ni(tpy) catalytic system achieves a high yield (1724 μmol/g)
in the reduction of CO2 to CO/CH4, which is
approximately 26-fold higher than that achieved with the pristine
CsPbBr3 NCs. This work has developed a method for enhancing
the performance of photocatalytic CO2 reduction by immobilizing
metal complexes on perovskite NCs. The methodology we present here
provides a new platform for utilizing halide perovskite NCs for photocatalytic
applications.
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metal complexesCO 2 reductiontunable light absorption rangephotocatalytic CO 2 reductionaddress climate deteriorationCsPbBr 3 NCsHalide perovskite nanocrystalsCsPbBr 3 Perovskite NanocrystalsNiphotosensitizerBoosting Photocatalytic CO 2 Reductionimmobilizing metal complexesImmobilizing Metal Complexes Converting CO 2visible-light-driven CO 2 reductionmolar extinction coefficienthalide perovskite NCssiteligand-capped CsPbBr 3 NCs
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