Effect of Alumina Phase Transformation on Stability of Low-Loaded Pd-Rh Catalysts for CO Oxidation | Sciact - CRIS-система Института катализа

Effect of Alumina Phase Transformation on Stability of Low-Loaded Pd-Rh Catalysts for CO Oxidation Научная публикация

Конференция

EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 авг. - 4 сент. 2015 , Казань

Журнал

Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028

Вых. Данные

Год: 2017, Том: 60, Номер: 1-2, Страницы: 152-161 Страниц : 10 DOI: 10.1007/s11244-016-0726-4

Ключевые слова

Alumina, Bimetallic Pd-Rh catalysts, CO oxidation, Deactivation, Phase transformation, Stability, Thermal aging

Авторы

Vedyagin Aleksey A. ^1,2 , Volodin Alexander M. ¹ , Stoyanovskii Vladimir O. ¹ , Kenzhin Roman M. ¹ , Plyusnin Pavel E. ^3,4 , Shubin Yury V. ^3,4 , Mishakov Ilya V. ^1,2,4

Организации

1	Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia
2	National Research Tomsk Polytechnic University, Tomsk 634050, Russia
3	Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk 630090, Russia
4	Novosibirsk State University, Novosibirsk 630090, Russia

Информация о финансировании (1)

Федеральное агентство научных организаций России

V.45.3.2.

Bimetallic Pd-Rh catalysts with precious metal loading of 0.2 wt. % was prepared by incipient wetness impregnation of the support (γ Al2O3 or δ Al2O3) with dual complex salt [Pd(NH3)4]3 [Rh(NO2)6]2. Monometallic Pd and Rh catalysts as well as its mechanical mixture were used as the reference samples. All samples were exposed for in situ prompt thermal aging procedure, and characterized by EPR spectroscopy, UV-Vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. The nature of the support was found to have strong effect on high temperature stability of the samples. δ Al2O3 having non-uniform phase structure due to presence of θ Al2O3 and α Al2O3 traces causes the concentrating of rhodium near the interphase boundary, thus changing the mechanism of Rh3+ bulk diffusion if compare with γ Al2O3. No noticeable anchoring effects were observed for bimetallic Pd-Rh samples neither in terms of Rh bulk diffusion nor with regard to the Pd sintering. It has been found experimentally that phase transformation of γ Al2O3 at high temperatures does not play dramatic role for the deactivation of bimetallic Pd-Rh active species anchored to the electron-donor site of the support.

Vedyagin A.A. , Volodin A.M. , Stoyanovskii V.O. , Kenzhin R.M. , Plyusnin P.E. , Shubin Y.V. , Mishakov I.V.
Effect of Alumina Phase Transformation on Stability of Low-Loaded Pd-Rh Catalysts for CO Oxidation
Topics in Catalysis. 2017. V.60. N1-2. P.152-161. DOI: 10.1007/s11244-016-0726-4 WOS Scopus РИНЦ CAPlusCA OpenAlex

Опубликована online:	26 сент. 2016 г.
Опубликована в печати:	1 февр. 2017 г.

Web of science:	WOS:000395015100013
Scopus:	2-s2.0-85013908893
РИНЦ:	29481401
Chemical Abstracts:	2016:1577816
Chemical Abstracts (print):	166:241002
OpenAlex:	W2526377473

БД	Цитирований
Web of science	28
Scopus	28
РИНЦ	30
OpenAlex	29