Photochemical route for synthesizing atomically dispersed palladium catalysts

被引：1755

作者：

Liu, Pengxin ^{[1
,2
]}

Zhao, Yun ^{[1
,2
]}

Qin, Ruixuan ^{[1
,2
]}

Mo, Shiguang ^{[1
,2
]}

Chen, Guangxu ^{[1
,2
]}

Gu, Lin ^{[3
]}

Chevrier, Daniel M. ^{[4
]}

Zhang, Peng ^{[4
]}

Guo, Qing ^{[1
,2
]}

Zang, Dandan ^{[1
,2
]}

Wu, Binghui ^{[1
,2
]}

Fu, Gang ^{[1
,2
]}

Zheng, Nanfeng ^{[1
,2
]}

机构：

[1] Xiamen Univ, Collaborat Innovat Ctr Chem Energy Mat, Engn Res Ctr Nano Preparat Technol Fujian Prov, Natl Engn Lab Green Chem Prod Alcohols Ethers & E, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Dalhousie Univ, Dept Chem, Halifax, NS B3H 4R2, Canada

来源：

SCIENCE | 2016年 / 352卷 / 6287期

基金：

中国国家自然科学基金; 加拿大自然科学与工程研究理事会;

关键词：

WATER-GAS SHIFT; SINGLE-ATOM CATALYSIS; HETEROGENEOUS CATALYSTS; CO OXIDATION; ACTIVE-SITES; HYDROGENATION; CLUSTERS; SURFACE; TIO2; SIZE;

D O I：

10.1126/science.aaf5251

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Atomically dispersed noble metal catalysts often exhibit high catalytic performances, but the metal loading density must be kept low (usually below 0.5%) to avoid the formation of metal nanoparticles through sintering. We report a photochemical strategy to fabricate a stable atomically dispersed palladium-titanium oxide catalyst (Pd-1/TiO2) on ethylene glycolate (EG)-stabilized ultrathin TiO2 nanosheets containing Pd up to 1.5%. The Pd-1/TiO2 catalyst exhibited high catalytic activity in hydrogenation of C=C bonds, exceeding that of surface Pd atoms on commercial Pd catalysts by a factor of 9. No decay in the activity was observed for 20 cycles. More important, the Pd-1/TiO2-EG system could activate H-2 in a heterolytic pathway, leading to a catalytic enhancement in hydrogenation of aldehydes by a factor of more than 55.

引用

页码：797 / 801

页数：5

共 40 条

[1] Acetylene cyclotrimerization on supported size-selected Pdn clusters (1≤n≤30):: one atom is enough! [J].