Ni(OH)2 Decorated Pt-Cu Octahedra for Ethanol Electrooxidation Reaction

Youngmin Hong; Hee Jin Kim; Hye Jin Lee; Jeonghyeon Kim; Sang Il Choi

doi:10.3389/fchem.2019.00608

Ni(OH)₂ Decorated Pt-Cu Octahedra for Ethanol Electrooxidation Reaction

Youngmin Hong
, Hee Jin Kim
, Hye Jin Lee
, Jeonghyeon Kim
, Sang Il Choi

Kyungpook National University

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

17 Scopus citations

Abstract

Here we report the synthesis of 9 nm Ni(OH)₂ decorated Pt-Cu octahedra (Ni(OH)₂-PtCu) in one-pot synthesis for ethanol oxidation reaction (EOR) electrocatalysis in acidic electrolyte. To prepare Ni(OH)₂-PtCu octahedra, CO gas was directly introduced in a reaction process as selective capping agents on the PtCu(111) facet. Ni(OH)₂ was naturally deposited on the Pt-Cu octahedra during the synthesis. Carbon supported Ni(OH)₂-PtCu (Ni(OH)₂-PtCu/C) as an EOR catalyst showed enhanced CO tolerance due to the existence of oxophilic Ni(OH)₂ on the surface of Pt-Cu, facilitating water dissolution to produce OH adsorption and to promote complete CO oxidation to CO₂. In addition, Pt-Cu alloy composition also showed improvement of CO tolerance because of modified d-band structure of the Pt atoms, thereby weakening the binding strength of CO on the catalysts. Therefore, the Ni(OH)₂-PtCu/C showed enhanced EOR activity and durability compared to the Pt-Cu octahedra and commercial Pt/C counterparts.

Original language	English
Article number	608
Journal	Frontiers in Chemistry
Volume	7
DOIs	https://doi.org/10.3389/fchem.2019.00608
State	Published - 3 Sep 2019

Keywords

copper
ethanol oxidation
nickel hydroxide
octahedra
platinum

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10.3389/fchem.2019.00608

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title = "Ni(OH)2 Decorated Pt-Cu Octahedra for Ethanol Electrooxidation Reaction",

abstract = "Here we report the synthesis of 9 nm Ni(OH)2 decorated Pt-Cu octahedra (Ni(OH)2-PtCu) in one-pot synthesis for ethanol oxidation reaction (EOR) electrocatalysis in acidic electrolyte. To prepare Ni(OH)2-PtCu octahedra, CO gas was directly introduced in a reaction process as selective capping agents on the PtCu(111) facet. Ni(OH)2 was naturally deposited on the Pt-Cu octahedra during the synthesis. Carbon supported Ni(OH)2-PtCu (Ni(OH)2-PtCu/C) as an EOR catalyst showed enhanced CO tolerance due to the existence of oxophilic Ni(OH)2 on the surface of Pt-Cu, facilitating water dissolution to produce OH adsorption and to promote complete CO oxidation to CO2. In addition, Pt-Cu alloy composition also showed improvement of CO tolerance because of modified d-band structure of the Pt atoms, thereby weakening the binding strength of CO on the catalysts. Therefore, the Ni(OH)2-PtCu/C showed enhanced EOR activity and durability compared to the Pt-Cu octahedra and commercial Pt/C counterparts.",

keywords = "copper, ethanol oxidation, nickel hydroxide, octahedra, platinum",

author = "Youngmin Hong and Kim, \{Hee Jin\} and Lee, \{Hye Jin\} and Jeonghyeon Kim and Choi, \{Sang Il\}",

note = "Publisher Copyright: {\textcopyright} Copyright {\textcopyright} 2019 Hong, Kim, Lee, Kim and Choi.",

year = "2019",

month = sep,

day = "3",

doi = "10.3389/fchem.2019.00608",

language = "English",

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T1 - Ni(OH)2 Decorated Pt-Cu Octahedra for Ethanol Electrooxidation Reaction

AU - Hong, Youngmin

AU - Kim, Hee Jin

AU - Lee, Hye Jin

AU - Kim, Jeonghyeon

AU - Choi, Sang Il

PY - 2019/9/3

Y1 - 2019/9/3

N2 - Here we report the synthesis of 9 nm Ni(OH)2 decorated Pt-Cu octahedra (Ni(OH)2-PtCu) in one-pot synthesis for ethanol oxidation reaction (EOR) electrocatalysis in acidic electrolyte. To prepare Ni(OH)2-PtCu octahedra, CO gas was directly introduced in a reaction process as selective capping agents on the PtCu(111) facet. Ni(OH)2 was naturally deposited on the Pt-Cu octahedra during the synthesis. Carbon supported Ni(OH)2-PtCu (Ni(OH)2-PtCu/C) as an EOR catalyst showed enhanced CO tolerance due to the existence of oxophilic Ni(OH)2 on the surface of Pt-Cu, facilitating water dissolution to produce OH adsorption and to promote complete CO oxidation to CO2. In addition, Pt-Cu alloy composition also showed improvement of CO tolerance because of modified d-band structure of the Pt atoms, thereby weakening the binding strength of CO on the catalysts. Therefore, the Ni(OH)2-PtCu/C showed enhanced EOR activity and durability compared to the Pt-Cu octahedra and commercial Pt/C counterparts.

AB - Here we report the synthesis of 9 nm Ni(OH)2 decorated Pt-Cu octahedra (Ni(OH)2-PtCu) in one-pot synthesis for ethanol oxidation reaction (EOR) electrocatalysis in acidic electrolyte. To prepare Ni(OH)2-PtCu octahedra, CO gas was directly introduced in a reaction process as selective capping agents on the PtCu(111) facet. Ni(OH)2 was naturally deposited on the Pt-Cu octahedra during the synthesis. Carbon supported Ni(OH)2-PtCu (Ni(OH)2-PtCu/C) as an EOR catalyst showed enhanced CO tolerance due to the existence of oxophilic Ni(OH)2 on the surface of Pt-Cu, facilitating water dissolution to produce OH adsorption and to promote complete CO oxidation to CO2. In addition, Pt-Cu alloy composition also showed improvement of CO tolerance because of modified d-band structure of the Pt atoms, thereby weakening the binding strength of CO on the catalysts. Therefore, the Ni(OH)2-PtCu/C showed enhanced EOR activity and durability compared to the Pt-Cu octahedra and commercial Pt/C counterparts.

KW - copper

KW - ethanol oxidation

KW - nickel hydroxide

KW - octahedra

KW - platinum

UR - https://www.scopus.com/pages/publications/85072836942

U2 - 10.3389/fchem.2019.00608

DO - 10.3389/fchem.2019.00608

M3 - Article

AN - SCOPUS:85072836942

SN - 2296-2646

VL - 7

JO - Frontiers in Chemistry

JF - Frontiers in Chemistry

M1 - 608

ER -

Ni(OH)₂ Decorated Pt-Cu Octahedra for Ethanol Electrooxidation Reaction

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Keywords

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