Self-regenerative noble metal catalysts supported on high-entropy oxides

被引：53

作者：

Chen, Hao ^{[1
]}

Sun, Yifan ^{[2
]}

Yang, Shize ^{[3
,7
]}

Wang, Hui ^{[4
]}

Dmowski, Wojciech ^{[4
]}

Egami, Takeshi ^{[4
,5
,6
]}

Dai, Sheng ^{[1
,2
]}

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA

[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[4] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[5] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[6] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[7] Arizona State Univ, Eyring Mat Ctr, Tempe, AZ 85287 USA

来源：

CHEMICAL COMMUNICATIONS | 2020年 / 56卷 / 95期

关键词：

NANOPARTICLES; ALLOYS; OXIDATION; RH; PD;

D O I：

10.1039/d0cc05860b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Discovery of anti-sintering noble metal catalysts is challenging, as supported noble metal species tend to aggregate at high temperatures, leading to severely deteriorated catalytic performances. Here we show that 1 wt% of noble metal species including Au, Pd and Ru can be incorporated into high-entropy oxides (HEOs) through entropy stabilization at 900 degrees C in air. A reversible temperature-dependent dissolution-exsolution process is observed for Au-HEO. Further correlation with distinct CO oxidation capabilities demonstrates the potential to utilize the entropy effect to access self-regenerative catalysts for catalytic reactions.

引用

收藏

页码：15056 / 15059

页数：4

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