Mo掺杂FeS超薄纳米片电催化氮气还原合成氨的研究
张刚 , 范旭卓 , 张鉴定 , 何雨晴 , 郑栋 , 程盛
现代化工 ›› 2025, Vol. 45 ›› Issue (1) : 100 -104.
Mo掺杂FeS超薄纳米片电催化氮气还原合成氨的研究
Mo doped FeS ultrathin nanosheets for electro-catalyzing nitrogen reduction under ambient conditions
超薄二维纳米片因其独特的尺寸依赖性而引起了人们的关注。然而,超薄纳米片合成方法以及纯的超薄片性能有待优化。建立了一种易于制备的不同Mo物质的量掺杂FeS超薄纳米片的合成方法,通过Mo掺杂FeS超薄纳米片调节活性位点的电子结构和环境、缓冲多种反应中间体、促进N2的吸收、降低电位测定步骤的能垒、加速催化过程来提高电催化氮还原反应(eNRR)的活性和选择性。结果表明,无贵金属催化剂Mo-FeS在eNRR中表现出高效催化性能,在0.1 mol/L Na2SO4、 -0.1 V下(相对可逆氢电极)产氨速率为10.79 μg/(h·cm2)。
Ultrathin two-dimensional (2D) nanosheets have garnered significant attention due to their unique size-dependent properties.However,the synthesis methods for these nanosheets as well as the properties of pure ultrathin nanosheets need to be optimized.Herein,a synthesis method is established successfully for easily synthesizable ultrathin FeS nanosheets doped with varying concentrations of Mo to enhance the activity and selectivity of electrocatalytic nitrogen reduction reaction (eNRR),which is achieved through Mo doping FeS to modulate the electronic structure and environment of the active sites,buffer various reaction intermediates,facilitate the absorption of N2,reduce the energy barrier for potentiostatic determination step,and accelerate catalytic process.It is indicated by the results that this noble metal-free Mo-FeS catalyst exhibits efficient performance in eNRR with an ammonia production rate of 10.79 μg·h-1·cm-2 in 0.1 mol/L Na2SO4 at -0.1 V vs reversible hydrogen
胶体合成 / Mo掺杂 / 硫化铁 / 氮气还原 / 超薄纳米片
colloid synthesis / Mo doping / iron sulfide / nitrogen reduction / ultrathin nanosheets
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国家自然科学基金面上项目(22171065)
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