Support morphology-dependent alloying behaviour and interfacial effects of bimetallic Ni–Cu/CeO2 catalysts

Yanan Liu, Alan J McCue, Pengfei Yang, Yufei He, Lirong Zheng, Xingzhong Cao, Yi Man, Junting Feng (Corresponding Author), James A Anderson (Corresponding Author), Dianqing Li

Research output: Contribution to journalArticle

3 Downloads (Pure)

Abstract

The impregnation method is commonly employed to prepare supported multi-metallic catalysts but it is often difficult to achieve homogeneous and stable alloy structures. In this work, we revealed the dependence of alloying behavior on the support morphology by fabricating Ni–Cu over different shaped CeO2. Specifically, nanocube ceria favoured the formation of monometallic Cu and Ni-rich phases whereas polycrystalline and nanorod ceria induced the formation of a mixture of Cu-rich alloys with monometallic Ni. Surprisingly, nanopolyhedron (NP) ceria led to the generation of homogeneous Ni–Cu nanoalloys owing to the equivalent interactions of Ni and Cu species with CeO2 (111) facets which exposed relatively few coordinative unsaturated sites. More importantly, a strong interfacial effect was observed for Ni–Cu/CeO2-NP due to the presence of CeOx adjacent to metal sites at the interface, resulting in excellent stability of the alloy structure. With the aid of CeOx, NiCu nanoalloys showed outstanding catalytic behaviour in acetylene and hexyne hydrogenation reactions. This study provides valuable insights into how fully alloyed and stable catalysts may be prepared by tailoring the support morphology while still employing a universal impregnation method.

Original languageEnglish
Pages (from-to)3556-3566
Number of pages11
JournalChemical Science
Volume10
Issue number12
Early online date8 Feb 2019
DOIs
Publication statusPublished - 28 Mar 2019

Fingerprint

Cerium compounds
Alloying
Impregnation
Catalysts
Acetylene
Nanorods
Catalyst supports
Hydrogenation
Metals

Keywords

  • CEO2
  • CERIA CATALYSTS
  • CO
  • GOLD NANOPARTICLES
  • HYDROGENATION
  • METHANE
  • NI
  • OXIDATION
  • SURFACE
  • WATER-GAS SHIFT

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Support morphology-dependent alloying behaviour and interfacial effects of bimetallic Ni–Cu/CeO2 catalysts. / Liu, Yanan; McCue, Alan J; Yang, Pengfei; He, Yufei; Zheng, Lirong; Cao, Xingzhong; Man, Yi; Feng, Junting (Corresponding Author); Anderson, James A (Corresponding Author); Li, Dianqing.

In: Chemical Science, Vol. 10, No. 12, 28.03.2019, p. 3556-3566 .

Research output: Contribution to journalArticle

Liu, Y, McCue, AJ, Yang, P, He, Y, Zheng, L, Cao, X, Man, Y, Feng, J, Anderson, JA & Li, D 2019, 'Support morphology-dependent alloying behaviour and interfacial effects of bimetallic Ni–Cu/CeO2 catalysts' Chemical Science, vol. 10, no. 12, pp. 3556-3566 . https://doi.org/10.1039/C8SC05423A
Liu, Yanan ; McCue, Alan J ; Yang, Pengfei ; He, Yufei ; Zheng, Lirong ; Cao, Xingzhong ; Man, Yi ; Feng, Junting ; Anderson, James A ; Li, Dianqing. / Support morphology-dependent alloying behaviour and interfacial effects of bimetallic Ni–Cu/CeO2 catalysts. In: Chemical Science. 2019 ; Vol. 10, No. 12. pp. 3556-3566 .
@article{24e97d693f8f4172979ec846f09c2baf,
title = "Support morphology-dependent alloying behaviour and interfacial effects of bimetallic Ni–Cu/CeO2 catalysts",
abstract = "The impregnation method is commonly employed to prepare supported multi-metallic catalysts but it is often difficult to achieve homogeneous and stable alloy structures. In this work, we revealed the dependence of alloying behavior on the support morphology by fabricating Ni–Cu over different shaped CeO2. Specifically, nanocube ceria favoured the formation of monometallic Cu and Ni-rich phases whereas polycrystalline and nanorod ceria induced the formation of a mixture of Cu-rich alloys with monometallic Ni. Surprisingly, nanopolyhedron (NP) ceria led to the generation of homogeneous Ni–Cu nanoalloys owing to the equivalent interactions of Ni and Cu species with CeO2 (111) facets which exposed relatively few coordinative unsaturated sites. More importantly, a strong interfacial effect was observed for Ni–Cu/CeO2-NP due to the presence of CeOx adjacent to metal sites at the interface, resulting in excellent stability of the alloy structure. With the aid of CeOx, NiCu nanoalloys showed outstanding catalytic behaviour in acetylene and hexyne hydrogenation reactions. This study provides valuable insights into how fully alloyed and stable catalysts may be prepared by tailoring the support morphology while still employing a universal impregnation method.",
keywords = "CEO2, CERIA CATALYSTS, CO, GOLD NANOPARTICLES, HYDROGENATION, METHANE, NI, OXIDATION, SURFACE, WATER-GAS SHIFT",
author = "Yanan Liu and McCue, {Alan J} and Pengfei Yang and Yufei He and Lirong Zheng and Xingzhong Cao and Yi Man and Junting Feng and Anderson, {James A} and Dianqing Li",
note = "This work was supported by the National Key Research and Development Program of China (2016YFB0301601), the National Natural Science Foundation and the Fundamental Research Funds for the Central Universities (BHYC1701B, JD1916).",
year = "2019",
month = "3",
day = "28",
doi = "10.1039/C8SC05423A",
language = "English",
volume = "10",
pages = "3556--3566",
journal = "Chemical Science",
issn = "2041-6539",
publisher = "Royal Society of Chemistry",
number = "12",

}

TY - JOUR

T1 - Support morphology-dependent alloying behaviour and interfacial effects of bimetallic Ni–Cu/CeO2 catalysts

AU - Liu, Yanan

AU - McCue, Alan J

AU - Yang, Pengfei

AU - He, Yufei

AU - Zheng, Lirong

AU - Cao, Xingzhong

AU - Man, Yi

AU - Feng, Junting

AU - Anderson, James A

AU - Li, Dianqing

N1 - This work was supported by the National Key Research and Development Program of China (2016YFB0301601), the National Natural Science Foundation and the Fundamental Research Funds for the Central Universities (BHYC1701B, JD1916).

PY - 2019/3/28

Y1 - 2019/3/28

N2 - The impregnation method is commonly employed to prepare supported multi-metallic catalysts but it is often difficult to achieve homogeneous and stable alloy structures. In this work, we revealed the dependence of alloying behavior on the support morphology by fabricating Ni–Cu over different shaped CeO2. Specifically, nanocube ceria favoured the formation of monometallic Cu and Ni-rich phases whereas polycrystalline and nanorod ceria induced the formation of a mixture of Cu-rich alloys with monometallic Ni. Surprisingly, nanopolyhedron (NP) ceria led to the generation of homogeneous Ni–Cu nanoalloys owing to the equivalent interactions of Ni and Cu species with CeO2 (111) facets which exposed relatively few coordinative unsaturated sites. More importantly, a strong interfacial effect was observed for Ni–Cu/CeO2-NP due to the presence of CeOx adjacent to metal sites at the interface, resulting in excellent stability of the alloy structure. With the aid of CeOx, NiCu nanoalloys showed outstanding catalytic behaviour in acetylene and hexyne hydrogenation reactions. This study provides valuable insights into how fully alloyed and stable catalysts may be prepared by tailoring the support morphology while still employing a universal impregnation method.

AB - The impregnation method is commonly employed to prepare supported multi-metallic catalysts but it is often difficult to achieve homogeneous and stable alloy structures. In this work, we revealed the dependence of alloying behavior on the support morphology by fabricating Ni–Cu over different shaped CeO2. Specifically, nanocube ceria favoured the formation of monometallic Cu and Ni-rich phases whereas polycrystalline and nanorod ceria induced the formation of a mixture of Cu-rich alloys with monometallic Ni. Surprisingly, nanopolyhedron (NP) ceria led to the generation of homogeneous Ni–Cu nanoalloys owing to the equivalent interactions of Ni and Cu species with CeO2 (111) facets which exposed relatively few coordinative unsaturated sites. More importantly, a strong interfacial effect was observed for Ni–Cu/CeO2-NP due to the presence of CeOx adjacent to metal sites at the interface, resulting in excellent stability of the alloy structure. With the aid of CeOx, NiCu nanoalloys showed outstanding catalytic behaviour in acetylene and hexyne hydrogenation reactions. This study provides valuable insights into how fully alloyed and stable catalysts may be prepared by tailoring the support morphology while still employing a universal impregnation method.

KW - CEO2

KW - CERIA CATALYSTS

KW - CO

KW - GOLD NANOPARTICLES

KW - HYDROGENATION

KW - METHANE

KW - NI

KW - OXIDATION

KW - SURFACE

KW - WATER-GAS SHIFT

UR - http://www.scopus.com/inward/record.url?scp=85063354103&partnerID=8YFLogxK

U2 - 10.1039/C8SC05423A

DO - 10.1039/C8SC05423A

M3 - Article

VL - 10

SP - 3556

EP - 3566

JO - Chemical Science

JF - Chemical Science

SN - 2041-6539

IS - 12

ER -