CO preferential oxidation on Pt0.5Co0.5 and Pt-CoOx model catalysts: Catalytic performance and operando XRD studies

D. I. Potemkin; E. Yu Filatov; A. V. Zadesenets; V. A. Sobyanin

doi:10.1016/j.catcom.2017.07.008

CO preferential oxidation on Pt_0.5Co_0.5 and Pt-CoO_x model catalysts: Catalytic performance and operando XRD studies

D. I. Potemkin, E. Yu Filatov, A. V. Zadesenets, V. A. Sobyanin

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

18 Цитирования (Scopus)

Аннотация

Nanopowders of unordered solid solution Pt_0.5Co_0.5 and metal-oxide composite Pt-CoO_x were prepared via double complex salt [Pt(NH₃)₄][Co(C₂O₄)₂(H₂O)₂]·2H₂O decomposition in He and air streams, respectively. It was shown that, compared to metallic Pt nanopowder, both Pt_0.5Co_0.5 and Pt-CoO_x exhibited high CO preferential oxidation (CO PROX) performance under mild conditions and provided complete CO conversion with 50–100% selectivity at near-ambient temperature and WHSV of 80,000 cm³ g^{− 1} h^{− 1}. Operando XRD study revealed that under CO PROX conditions Pt_0.5Co_0.5 was stable, while Pt-CoO_x underwent reduction even at 50 °C and consisted of Pt and Co nanoparticles. The high performance of both (alloyed and not alloyed) Pt-Co bimetallic systems exhibits the key role of Pt-Co interface, i.e. the so-called “ensemble effect”, in the synergism.

Язык оригинала	английский
Страницы (с-по)	232-236
Число страниц	5
Журнал	Catalysis Communications
Том	100
DOI	https://doi.org/10.1016/j.catcom.2017.07.008
Состояние	Опубликовано - сент. 2017

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10.1016/j.catcom.2017.07.008

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@article{fc3205697278493dacb2fa8e08b45ac0,

title = "CO preferential oxidation on Pt0.5Co0.5 and Pt-CoOx model catalysts: Catalytic performance and operando XRD studies",

abstract = "Nanopowders of unordered solid solution Pt0.5Co0.5 and metal-oxide composite Pt-CoOx were prepared via double complex salt [Pt(NH3)4][Co(C2O4)2(H2O)2]·2H2O decomposition in He and air streams, respectively. It was shown that, compared to metallic Pt nanopowder, both Pt0.5Co0.5 and Pt-CoOx exhibited high CO preferential oxidation (CO PROX) performance under mild conditions and provided complete CO conversion with 50–100% selectivity at near-ambient temperature and WHSV of 80,000 cm3 g− 1 h− 1. Operando XRD study revealed that under CO PROX conditions Pt0.5Co0.5 was stable, while Pt-CoOx underwent reduction even at 50 °C and consisted of Pt and Co nanoparticles. The high performance of both (alloyed and not alloyed) Pt-Co bimetallic systems exhibits the key role of Pt-Co interface, i.e. the so-called “ensemble effect”, in the synergism.",

keywords = "Bimetallic catalysts, CO cleanup, Hydrogen-rich gas, Platinum-cobalt, Preferential CO oxidation, Pt-Co catalysts, SELECTIVE OXIDATION, SUPPORTED CATALYSTS, PARTICLES, MECHANISM, DECOMPOSITION, STREAM, EXCESS HYDROGEN, H-2-RICH GASES, CARBON-MONOXIDE, BIMETALLIC CATALYSTS",

author = "Potemkin, {D. I.} and Filatov, {E. Yu} and Zadesenets, {A. V.} and Sobyanin, {V. A.}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = sep,

doi = "10.1016/j.catcom.2017.07.008",

language = "English",

volume = "100",

pages = "232--236",

journal = "Catalysis Communications",

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publisher = "Elsevier",

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CO preferential oxidation on Pt_0.5Co_0.5 and Pt-CoO_x model catalysts : Catalytic performance and operando XRD studies. / Potemkin, D. I.; Filatov, E. Yu ; Zadesenets, A. V. и др.

В: Catalysis Communications, Том 100, 09.2017, стр. 232-236.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

TY - JOUR

T1 - CO preferential oxidation on Pt0.5Co0.5 and Pt-CoOx model catalysts

T2 - Catalytic performance and operando XRD studies

AU - Potemkin, D. I.

AU - Filatov, E. Yu

AU - Zadesenets, A. V.

AU - Sobyanin, V. A.

PY - 2017/9

Y1 - 2017/9

N2 - Nanopowders of unordered solid solution Pt0.5Co0.5 and metal-oxide composite Pt-CoOx were prepared via double complex salt [Pt(NH3)4][Co(C2O4)2(H2O)2]·2H2O decomposition in He and air streams, respectively. It was shown that, compared to metallic Pt nanopowder, both Pt0.5Co0.5 and Pt-CoOx exhibited high CO preferential oxidation (CO PROX) performance under mild conditions and provided complete CO conversion with 50–100% selectivity at near-ambient temperature and WHSV of 80,000 cm3 g− 1 h− 1. Operando XRD study revealed that under CO PROX conditions Pt0.5Co0.5 was stable, while Pt-CoOx underwent reduction even at 50 °C and consisted of Pt and Co nanoparticles. The high performance of both (alloyed and not alloyed) Pt-Co bimetallic systems exhibits the key role of Pt-Co interface, i.e. the so-called “ensemble effect”, in the synergism.

AB - Nanopowders of unordered solid solution Pt0.5Co0.5 and metal-oxide composite Pt-CoOx were prepared via double complex salt [Pt(NH3)4][Co(C2O4)2(H2O)2]·2H2O decomposition in He and air streams, respectively. It was shown that, compared to metallic Pt nanopowder, both Pt0.5Co0.5 and Pt-CoOx exhibited high CO preferential oxidation (CO PROX) performance under mild conditions and provided complete CO conversion with 50–100% selectivity at near-ambient temperature and WHSV of 80,000 cm3 g− 1 h− 1. Operando XRD study revealed that under CO PROX conditions Pt0.5Co0.5 was stable, while Pt-CoOx underwent reduction even at 50 °C and consisted of Pt and Co nanoparticles. The high performance of both (alloyed and not alloyed) Pt-Co bimetallic systems exhibits the key role of Pt-Co interface, i.e. the so-called “ensemble effect”, in the synergism.

KW - Bimetallic catalysts

KW - CO cleanup

KW - Hydrogen-rich gas

KW - Platinum-cobalt

KW - Preferential CO oxidation

KW - Pt-Co catalysts

KW - SELECTIVE OXIDATION

KW - SUPPORTED CATALYSTS

KW - PARTICLES

KW - MECHANISM

KW - DECOMPOSITION

KW - STREAM

KW - EXCESS HYDROGEN

KW - H-2-RICH GASES

KW - CARBON-MONOXIDE

KW - BIMETALLIC CATALYSTS

UR - http://www.scopus.com/inward/record.url?scp=85024132523&partnerID=8YFLogxK

U2 - 10.1016/j.catcom.2017.07.008

DO - 10.1016/j.catcom.2017.07.008

M3 - Article

AN - SCOPUS:85024132523

VL - 100

SP - 232

EP - 236

JO - Catalysis Communications

JF - Catalysis Communications

SN - 1566-7367

ER -