Synergistic plasmon resonance hybridization of iron‐dispersed MoO3−x/MXene for enhanced nitrogen photothermal reduction

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Abstract
Plasmonic photochemical N2 fixation has received widespread attention owing to the attractive plasmonic enhancement effects in improving solar‐to‐NH3 conversion efficiency. However, the weak N2 adsorption affinity in metallic plasmonic photocatalysts and insurmountable interfacial barriers in metal–semiconductor plasmonic photocatalysts lead to rapid charge carrier recombination instead of participating in N2‐to‐NH3 conversion. Herein, a photothermal catalyst Fe‐dispersed MoO3−x/MXene with synergistic plasmon resonance hybridization structure is fabricated for photothermal N2 fixation. The hybrid plasmon resonance effects derived from MXene and MoO3−x induce a strong optical response across the ultraviolet–visible‐near‐infrared range and generation of energetic charge carriers, and the induced photothermal effect further accelerates electron extraction, transport, and surface reaction kinetics. Moreover, the abundant oxygen vacancies and Fe sites can intensify the N2 adsorption and donate the energetic electrons into the anti‐bonding system for the stimulative NH coupling process. A high NH3 formation rate of 87.1 μmol g−1 h−1 is achieved under solar‐level illumination.
Funding Information
  • National Natural Science Foundation of China (22476222)
  • Natural Science Foundation of Guangdong Province (2022B1515020098)
  • Guangzhou Municipal Science and Technology Project (2023B03J0004)

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