State of Supported Nickel Nanoparticles during Catalysis in Aqueous Media

Zizwe A. Chase; Stanislav Kasakov; Hui Shi; Aleksei Vjunov; John L. Fulton; Donald M. Camaioni; Mahalingam Balasubramanian; Chen Zhao; Yong Wang; Johannes A. Lercher

doi:10.1002/chem.201502723

State of Supported Nickel Nanoparticles during Catalysis in Aqueous Media

Zizwe A. Chase, Stanislav Kasakov, Hui Shi, Aleksei Vjunov, John L. Fulton, Donald M. Camaioni, Mahalingam Balasubramanian, Chen Zhao, Yong Wang, Johannes A. Lercher

School of Chemistry and Molecular Engineering

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The state of Ni supported on HZSM-5 zeolite, silica, and sulfonated carbon was studied during aqueous-phase catalysis of phenol hydrodeoxygenation using in situ extended X-ray absorption fine structure spectroscopy. On sulfonated carbon and HZSM-5 supports, NiO and Ni(OH)₂ were readily reduced to Ni⁰ under reaction conditions (≈35 bar H₂ in aqueous phenol solutions containing up to 0.5 wt. % phosphoric acid at 473 K). In contrast, Ni supported on SiO₂ was not stable in a fully reduced Ni⁰ state. Water enables the formation of Ni^II phyllosilicate, which is more stable, that is, difficult to reduce, than either α-Ni(OH)₂ or NiO. Leaching of Ni from the supports was not observed over a broad range of reaction conditions. Ni⁰ particles on HZSM-5 were stable even in presence of 15 wt. % acetic acid at 473 K and 35 bar H₂.

Original language	English
Pages (from-to)	16541-16546
Number of pages	6
Journal	Chemistry - A European Journal
Volume	21
Issue number	46
DOIs	https://doi.org/10.1002/chem.201502723
State	Published - 1 Nov 2015

Keywords

EXAFS
XANES
hydrogenation
nanoparticles
nickel

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title = "State of Supported Nickel Nanoparticles during Catalysis in Aqueous Media",

abstract = "The state of Ni supported on HZSM-5 zeolite, silica, and sulfonated carbon was studied during aqueous-phase catalysis of phenol hydrodeoxygenation using in situ extended X-ray absorption fine structure spectroscopy. On sulfonated carbon and HZSM-5 supports, NiO and Ni(OH)2 were readily reduced to Ni0 under reaction conditions (≈35 bar H2 in aqueous phenol solutions containing up to 0.5 wt. \% phosphoric acid at 473 K). In contrast, Ni supported on SiO2 was not stable in a fully reduced Ni0 state. Water enables the formation of NiII phyllosilicate, which is more stable, that is, difficult to reduce, than either α-Ni(OH)2 or NiO. Leaching of Ni from the supports was not observed over a broad range of reaction conditions. Ni0 particles on HZSM-5 were stable even in presence of 15 wt. \% acetic acid at 473 K and 35 bar H2.",

keywords = "EXAFS, XANES, hydrogenation, nanoparticles, nickel",

author = "Chase, \{Zizwe A.\} and Stanislav Kasakov and Hui Shi and Aleksei Vjunov and Fulton, \{John L.\} and Camaioni, \{Donald M.\} and Mahalingam Balasubramanian and Chen Zhao and Yong Wang and Lercher, \{Johannes A.\}",

note = "Publisher Copyright: {\textcopyright} 2015 Wiley-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

year = "2015",

month = nov,

day = "1",

doi = "10.1002/chem.201502723",

language = "英语",

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journal = "Chemistry - A European Journal",

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T1 - State of Supported Nickel Nanoparticles during Catalysis in Aqueous Media

AU - Chase, Zizwe A.

AU - Kasakov, Stanislav

AU - Shi, Hui

AU - Vjunov, Aleksei

AU - Fulton, John L.

AU - Camaioni, Donald M.

AU - Balasubramanian, Mahalingam

AU - Zhao, Chen

AU - Wang, Yong

AU - Lercher, Johannes A.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - The state of Ni supported on HZSM-5 zeolite, silica, and sulfonated carbon was studied during aqueous-phase catalysis of phenol hydrodeoxygenation using in situ extended X-ray absorption fine structure spectroscopy. On sulfonated carbon and HZSM-5 supports, NiO and Ni(OH)2 were readily reduced to Ni0 under reaction conditions (≈35 bar H2 in aqueous phenol solutions containing up to 0.5 wt. % phosphoric acid at 473 K). In contrast, Ni supported on SiO2 was not stable in a fully reduced Ni0 state. Water enables the formation of NiII phyllosilicate, which is more stable, that is, difficult to reduce, than either α-Ni(OH)2 or NiO. Leaching of Ni from the supports was not observed over a broad range of reaction conditions. Ni0 particles on HZSM-5 were stable even in presence of 15 wt. % acetic acid at 473 K and 35 bar H2.

AB - The state of Ni supported on HZSM-5 zeolite, silica, and sulfonated carbon was studied during aqueous-phase catalysis of phenol hydrodeoxygenation using in situ extended X-ray absorption fine structure spectroscopy. On sulfonated carbon and HZSM-5 supports, NiO and Ni(OH)2 were readily reduced to Ni0 under reaction conditions (≈35 bar H2 in aqueous phenol solutions containing up to 0.5 wt. % phosphoric acid at 473 K). In contrast, Ni supported on SiO2 was not stable in a fully reduced Ni0 state. Water enables the formation of NiII phyllosilicate, which is more stable, that is, difficult to reduce, than either α-Ni(OH)2 or NiO. Leaching of Ni from the supports was not observed over a broad range of reaction conditions. Ni0 particles on HZSM-5 were stable even in presence of 15 wt. % acetic acid at 473 K and 35 bar H2.

KW - EXAFS

KW - XANES

KW - hydrogenation

KW - nanoparticles

KW - nickel

UR - https://www.scopus.com/pages/publications/84945897549

U2 - 10.1002/chem.201502723

DO - 10.1002/chem.201502723

M3 - 文章

AN - SCOPUS:84945897549

SN - 0947-6539

VL - 21

SP - 16541

EP - 16546

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

IS - 46

ER -

State of Supported Nickel Nanoparticles during Catalysis in Aqueous Media

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Keywords

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