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首页> 外文期刊>Catalysis Communications >Selective photocatalytic carbon dioxide conversion with Pt@Ag-TiO2 nanoparticles
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Selective photocatalytic carbon dioxide conversion with Pt@Ag-TiO2 nanoparticles

机译:用Pt @ Ag-TiO2纳米粒子选择性光催化二氧化碳转化率

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摘要

Pt@Ag-TiO2 nanocomposites were prepared and tested for photocatalytic CO2 conversion in the presence of H2O. The characterizations showed that Pt@Ag core@shell structures were formed. The photocatalytic activity of Pt@Ag-x-TiO2 catalysts with different Ag content showed that the deposition of Ag shell could increase the photocatalytic CO2 reduction efficiency and selectivity by suppressing H-2 generation. Pt@Ag-1.0-TiO2 with an Ag content of 1.95 wt.%s showed a maximum CH4 formation rate of 160.3 mu mol.g(-)(1).h(-1), together with a CO2 reduction selectivity of 87.90%. PL spectra and photocurrent measurements indicated that Pt@Ag-1.0-TiO2 had the highest photogenerated electron-hole separation efficiency among all the prepared photocatalysts.
机译:Pt@Ag-制备了TiO2纳米复合材料,并测试了其在H2O存在下的光催化CO2转化。这些特征表明Pt@Ag core@shell结构形成。光催化活性Pt@Ag-不同银含量的x-TiO2催化剂表明,银壳的沉积可以通过抑制H-2的生成来提高光催化CO2还原效率和选择性。Pt@Ag-Ag含量为1.95 wt.%s的1.0-TiO2显示出最大CH4生成速率为160.3μmol.g(-)(1)。h(-1),以及87.90%的CO2还原选择性。光致发光光谱和光电流测量表明Pt@Ag-在所有制备的光催化剂中,1.0-TiO2的光生电子-空穴分离效率最高。

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