Effect of Metal Ratio in Alumina-Supported Pd-Rh Nanoalloys on Its Performance in Three Way Catalysis Full article
| Journal |
Journal of Alloys and Compounds
ISSN: 0925-8388 , E-ISSN: 1873-4669 |
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| Output data | Year: 2018, Volume: 749, Pages: 155-162 Pages count : 8 DOI: 10.1016/j.jallcom.2018.03.250 | ||||||||
| Tags | Three-way catalysts; Metastable Pd-Rh alloy; Partly miscible metals; Metal ratio; Stability | ||||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 16-13-10192 |
Abstract:
The bimetallic Pd-Rh three-way catalysts were prepared by an incipient wetness impregnation of γ-Al2O3 with a joint solution of [Pd(NH3)4](NO3)2 and Na3 [Rh(NO2)6]. The ratio of the metals was varied by changing the ratio of the salt-precursors. The samples with Pd:Rh ratio of 3:2, 7:3 and 4:1 were compared in simultaneous oxidation of carbon monoxide, propane, propylene, and reduction of nitrogen monoxide at a lambda factor of 1.003 and 0.95. Stability tests were performed in a prompt thermal aging regime (consecutive heating-cooling cycles with a final temperature of 320, 600 and 800 °C). The samples were characterized by UV–vis and luminescence spectroscopies, and by testing reaction of ethane hydrogenolysis. It was found that the sample with Pd:Rh ratio of 3:2 is characterized with strong palladium-rhodium interaction, which makes this catalyst more stable at high temperature if compare with other alloyed Pd-Rh samples. Moreover, the mechanism of the three-way catalytic process over Pd:Rh (3:2) sample differs from other cases and involves a larger contribution of reactions with nitrogen oxide.
Cite:
Vedyagin A.A.
, Stoyanovskii V.O.
, Plyusnin P.E.
, Shubin Y.V.
, Slavinskaya E.M.
, Mishakov I.V.
Effect of Metal Ratio in Alumina-Supported Pd-Rh Nanoalloys on Its Performance in Three Way Catalysis
Journal of Alloys and Compounds. 2018. V.749. P.155-162. DOI: 10.1016/j.jallcom.2018.03.250 WOS Scopus РИНЦ ANCAN OpenAlex
Effect of Metal Ratio in Alumina-Supported Pd-Rh Nanoalloys on Its Performance in Three Way Catalysis
Journal of Alloys and Compounds. 2018. V.749. P.155-162. DOI: 10.1016/j.jallcom.2018.03.250 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Dec 1, 2017 |
| Accepted: | Mar 20, 2018 |
| Published online: | Mar 23, 2018 |
| Published print: | Jun 1, 2018 |
Identifiers:
| Web of science: | WOS:000432666200016 |
| Scopus: | 2-s2.0-85044605433 |
| Elibrary: | 35488783 |
| Chemical Abstracts: | 2018:665315 |
| Chemical Abstracts (print): | 168:411613 |
| OpenAlex: | W2791274404 |