文献类型：期刊文献

英文题名：Size-dependent activity and selectivity of carbon dioxide photocatalytic reduction over platinum nanoparticles

作者：Dong, Chunyang[1,2];Lian, Cheng[1,2];Hu, Songchang[1,2];Deng, Zesheng[1,2];Gong, Jianqiu[1,2];Li, Mingde[3,4];Liu, Honglai[1,2];Xing, Mingyang[1,2];Zhang, Jinlong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Shantou Univ, Dept Chem, Shantou 515063, Peoples R China;[4]Shantou Univ, Key Lab Preparat & Applicat Ordered Struct Mat Gu, Shantou 515063, Peoples R China

年份：2018

卷号：9

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000428520600007)】；

基金：This work was supported by the National Natural Science Foundation of China (21773062, 21577036, 21377038, 5171101651), the State Key Research Development Program of China (2016YFA0204200), the Shanghai Education Development Foundation and Shanghai Municipal Education Commission (16JC1401400), the Shanghai Pujiang Program (17PJD011), and the Fundamental Research Funds for the Central Universities (22A201514021).

语种：英文

摘要：Platinum nanoparticles (Pt NPs) are one of the most efficient cocatalysts in photocatalysis, and their size determines the activity and the selectivity of the catalytic reaction. Nevertheless, an in-depth understanding of the platinum's size effect in the carbon dioxide photocatalytic reduction is still lacking. Through analyses of the geometric features and electronic properties with variable-sized Pt NPs, here we show a prominent size effect of Pt NPs in both the activity and selectivity of carbon dioxide photocatalytic reduction. Decreasing the size of Pt NPs promotes the charge transfer efficiency, and thus enhances both the carbon dioxide photocatalytic reduction and hydrogen evolution reaction (HER) activity, but leads to higher selectivity towards hydrogen over methane. Combining experimental results and theoretical calculations, in Pt NPs, the terrace sites are revealed as the active sites for methane generation; meanwhile, the low-coordinated sites are more favorable in the competing HER.