Photocatalytic nitrogen reduction offers a carbon-neutral route to access ammonia by directly converting solar energy into chemical bonds,presenting a promising alternative to the energy-intensive Haber-Bosch process....Photocatalytic nitrogen reduction offers a carbon-neutral route to access ammonia by directly converting solar energy into chemical bonds,presenting a promising alternative to the energy-intensive Haber-Bosch process.However,current progress in pNRR is hindered by the formidable activation barrier of the NuN triple bond,which severely limits catalytic activity and NH_(3) yield.BiOBr-based semiconductors,distinguished by their layered lattice and tunable band structure,exhibit strong visible-light absorption and efficient charge separation,positioning them as compelling platforms for pNRR.This review provides the first comprehensive survey of BiOBr-based photocatalysts for photocatalytic nitrogen fixation.It begins by introducing the fundamental thermodynamics and reaction pathways of pNRR,followed by an analysis of four key modification strategies employed to enhance BiOBr performance.The review critically assesses the reliability of ammonia quantification protocols,highlighting concerns regarding contamination and artefactual sources.Additionally,three advanced in situ characterization techniques are discussed for their role in elucidating charge-transfer kinetics.By pinpointing current challenges and outlining future research priorities,this review aims to steer academic exploration,inspire innovative catalyst design,and accelerate the translation of BiOBr-based photocatalysis toward sustainable,modular ammonia production.展开更多
基金supported by the National Natural Science Foundation of China(No.22168040 and 22162025)the Yan’an University Graduate Student Scientific Research Innovation Program Project(No.YKY2025066)+2 种基金the Graduate Education Innovation Program of Yan’an University(YCX2024052)National Natural Science Foundation of China(No.22568049)Science and Technology Planning Project of Yan’an City(No.2024-CYL-030).
文摘Photocatalytic nitrogen reduction offers a carbon-neutral route to access ammonia by directly converting solar energy into chemical bonds,presenting a promising alternative to the energy-intensive Haber-Bosch process.However,current progress in pNRR is hindered by the formidable activation barrier of the NuN triple bond,which severely limits catalytic activity and NH_(3) yield.BiOBr-based semiconductors,distinguished by their layered lattice and tunable band structure,exhibit strong visible-light absorption and efficient charge separation,positioning them as compelling platforms for pNRR.This review provides the first comprehensive survey of BiOBr-based photocatalysts for photocatalytic nitrogen fixation.It begins by introducing the fundamental thermodynamics and reaction pathways of pNRR,followed by an analysis of four key modification strategies employed to enhance BiOBr performance.The review critically assesses the reliability of ammonia quantification protocols,highlighting concerns regarding contamination and artefactual sources.Additionally,three advanced in situ characterization techniques are discussed for their role in elucidating charge-transfer kinetics.By pinpointing current challenges and outlining future research priorities,this review aims to steer academic exploration,inspire innovative catalyst design,and accelerate the translation of BiOBr-based photocatalysis toward sustainable,modular ammonia production.
