Gold-doping of carbon-supported palladium improves reduction catalysis
Fang, YuLun; Heck, KN; Zhao, Z; Pretzer, LA; Guo, N; Wu, T; Miller, JT; Wong, MS
| HERO ID | 3464648 |
|---|---|
| In Press | No |
| Year | 2016 |
| Title | Gold-doping of carbon-supported palladium improves reduction catalysis |
| Authors | Fang, YuLun; Heck, KN; Zhao, Z; Pretzer, LA; Guo, N; Wu, T; Miller, JT; Wong, MS |
| Journal | Cuihua Xuebao / Chinese Journal of Catalysis |
| Volume | 37 |
| Issue | 10 |
| Page Numbers | 1776-1786 |
| Abstract | Bimetallic palladium-gold (PdAu) catalysts have better catalytic performance than monometallic catalysts for many applications. PdAu catalysts with controlled nanostructures and enhanced activities have been extensively studied but their syntheses require multiple and occasionally complicated steps. In this work, we demonstrated that supported PdAu catalysts could be simply prepared by doping a supported Pd catalyst with gold through wet impregnation and calcination. Resulting PdAu-on-carbon (PdAu/C) catalysts were tested for the room-temperature, aqueous-phase hydrodechlorination of trichloroethene. The most active PdAu/C catalyst (Pd 1.0 wt%, Au 1.1 wt%, dried/air/H-2 process) had an initial turnover frequency (TOF) of 34.0 x 10(-2) mol(TCE) mol(Pd)(-1) s(-1), which was >15 times higher than monometallic Pd/C (Pd 1.0 wt%, initial TOF of 2.2 x 10(-2) mol(TCE) mol(Pd)(-1) s(-1)). Through X-ray absorption spectroscopy, the gold kept Pd from oxidizing under calcination at 400 degrees C. Probable nanostructure evolution pathways are proposed to explain the observed catalysis. 2016, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved. |
| Doi | 10.1016/S1872-2067(16)62530-5 |
| Wosid | WOS:000386865300024 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | Bimetallic catalyst; Palladium; Gold; Nanostructures; X-ray absorption spectroscopy; Extended X-ray absorption fine structure; Hydrodechlorination; Trichloroethene |