Oxygen vacancy-rich MoO_3−x nanobelts for photocatalytic N₂ reduction to NH₃ in pure water

Abstract

Photocatalytic nitrogen fixation is a promising sustainable and green strategy for NH3 synthesis.

A Two‐dimensional Amorphous Plasmonic Heterostructure of Pd/MoO3‐x for Enhanced Photoelectrochemical Water Splitting Performance

“…For XPS spectra of Mo 3d, two main peaks loaded at 232.6 and 235.8 eV, which are attributed to 3d 5/2 and 3d 3/2 of Mo 6+ , and two weak peaks of Mo 3d XPS curve appear at the binding energy of 231.4 and 234.6 eV, belonging to Mo 5+ species (Figure 2c and d) [13] . The coexistence of Mo 6+ and Mo 5+ verifys the existence of oxygen vacancies [14] . For Pd/MoO 3‐x , the lower content of Mo 5+ is observed, resulting from the consumption of part Mo 5+ to reduce Pd precursor.…”

Sustainable Nanoplasmon‐Enhanced Photoredox Reactions: Synthesis, Characterization, and Applications

“…Using a combined experimental and theoretical approach, Canadell and co-workers determined that the intercalation of hydrogen into the lattice facilitates the formation of maximum number of MoMo bonds, which essentially stabilizes the lattice through hydrogen bonding with oxygen atoms. [48] Fabrication of MoO 3-x has been accomplished by liquid exfoliation approach, [25,[49][50][51] solid-phase electrochemical reduction, [52] hydrothermal method, [53,54] template-based approach, [55] evaporation induced self-assembly process with subsequent hydrogen reduction, [56] carbon dioxide assisted approach [57] etc. Presence of oxygen vacancies have been observed to enhance the charge storage kinetics and specific capacity of MoO 3-x , which has great implications for the development of superior capacitive energy storage systems.…”

“…Synthesized by a one‐pot hydrothermal method, the photocatalytic experiments were carried out at atmospheric pressure and room temperature in the absence of sacrificial agents and precious metal cocatalysts. [ 53 ] Surface oxygen vacancies, located on the (001) and (100) planes, assist in the adsorption of N 2 and the activation of the NN bond by decreasing the activation energy barrier. The as‐prepared MoO 3‐ x nanobelts exhibited a high ammonium production rate of around 230 µmol L −1 g −1 .…”

Recent Progress of Perovskite Oxide in Emerging Photocatalysis Landscape: Water Splitting, CO₂ Reduction, and N₂ Fixation

“…Since Schrauzer and Guth first reported that Fe-doped TiO2 has the capability to convert N2 into NH3 under UV light irradiation in 1977 273 the photocatalytic synthesis of NH3 has drawn immense attention for its energy-saving, high-efficiency, economy and environmentally friendly nature [274][275][276][277][278][279][280][281][282][283] . Subsequently, various photocatalyst like TiO2-based semiconductors 284 , g-C3N4 285 , ZnO 286 , BiOX 287 , WO3 288 as well as perovskite have been investigated in relation to N2 fixation properties, and the typical researches in this field are summarized in Table 4 121,146,[289][290][291][292] .…”