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- W4385453844 abstract "Light-assisted N2 fixation to NH3 under mild conditions is attracting massive attention to circumvent energy crisis and global warming. Herein, highly dispersed Cs-decorated Ru sub-nanometric clusters supported on ZrO2 NPs have been prepared by means of MOF-templated transformation method. The obtained catalyst exhibited N2 hydrogenation activity of 1.6 mmolNH3 · gcat-1 · h-1 in the dark (350 oC, 0.1 MPa). Remarkably this value increased by over 300%, reaching 5.1 mmolNH3·gcat-1·h-1 (204 mmolNH3 · gRu-1 · h-1) under 1 Sun power illumination (1080 W/m2) The influence of the incident light wavelength has been evaluated, revealing 81% and 213% enhancement in the NIR and visible region, respectively. DFT calculations were carried out to understand the static adsorption states of Ru sub-nanoclusters. Mechanistic studies have confirmed the co-existence of a photothermal and a nonthermal-hot electron mechanism. XPS, PXRD and FTIR analysis have determined that the Cs species block surface Zr4+ acidity, increasing the basicity of the ZrO2 support. Moreover, partially reduced Csδ+ (0<δ<1) species surrounding the Ru active sites are donating electron density to the adjacent Ru sites, favoring N2 adsorption. Finally, this photocatalyst has shown an extended stability for 100 h irradiation under continuous flow." @default.
- W4385453844 created "2023-08-02" @default.
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- W4385453844 date "2023-12-01" @default.
- W4385453844 modified "2023-10-02" @default.
- W4385453844 title "Light-Assistance in Nitrogen Fixation to Ammonia by Highly Dispersed Cs-Promoted Ru Clusters Supported on ZrO2" @default.
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- W4385453844 doi "https://doi.org/10.1016/j.apcatb.2023.123143" @default.
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