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首页> 外文期刊>Catalysis science & technology >Polyoxometalates covalently combined with graphitic carbon nitride for photocatalytic hydrogen peroxide production
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Polyoxometalates covalently combined with graphitic carbon nitride for photocatalytic hydrogen peroxide production

机译：杂多酸共价结合光催化石墨碳氮化过氧化氢生产

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摘要

The polyoxometalate (POM) cluster [SiW11O39](8-) (SiW11) with photoreductive ability has been successfully covalently combined with graphitic carbon nitride (g-C3N4) through an organic linker strategy. The hybrid catalyst g-C3N4-SiW11 exhibits efficient catalytic performance (15.2 mol h(-1)) for photocatalytic H2O2 production in the presence of methanol and can stabilize the formed H2O2 under sunlight irradiation (AM 1.5 filter). The Koutecky-Levich plot obtained from electrochemical rotating disk electrode (RDE) analysis of the oxygen reduction reaction (ORR) for g-C3N4-SiW11 reveals that the value of electron transfer during the ORR process is 2.76. Combining the electron spin resonance (ESR), Koutecky-Levich plots, O-2 temperature programmed desorption (O-2-TPD) and density functional theory (DFT) calculation results, the enhanced O-2 adsorption of g-C3N4-SiW11 can promote the two-electron reduction of O-2 to H2O2.
机译：polyoxometalate (POM)集群(SiW11O39) (8)(SiW11) photoreductive能力成功地共价结合石墨碳氮化(g-C3N4)通过一个有机链接器策略。展品高效催化性能(15.2摩尔h(1))光催化过氧化氢生产甲醇,可以稳定的存在阳光照射下形成过氧化氢(1.5过滤器)。旋转圆盘电极电化学(RDE)分析氧气还原反应(ORR)g-C3N4-SiW11显示的值在奥尔过程中电子转移是2.76。结合电子自旋共振(ESR),Koutecky-Levich情节,0 2温度设定解吸(O-2-TPD)和密度泛函理论(DFT)计算结果,增强0 2吸附g-C3N4-SiW11可以促进两电子还原-过氧化氢。

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