Understanding the Grain Boundary Behavior of Bimetallic Platinum-Cobalt Alloy Nanowires toward Oxygen Electro-Reduction

被引：28

作者：

Kabiraz, Mrinal Kanti ^{[1
,2
]}

Ruqia, Bibi ^{[1
,2
]}

Kim, Jeonghyeon ^{[1
,2
]}

Kim, Haesol ^{[3
]}

Kim, Hee Jin ^{[1
,2
]}

Hong, Youngmin ^{[1
,2
]}

Kim, Mi Ji ^{[1
,2
]}

Kim, Young Kyoung ^{[4
]}

Kim, Chan ^{[4
]}

Lee, Won-Jae ^{[1
,2
]}

Lee, Wonkyun ^{[5
]}

Hwang, Gyo Hyun ^{[5
]}

Ri, Hyeong Cheol ^{[4
]}

Baik, Hionsuck ^{[6
]}

Oh, Hyung-Suk ^{[7
]}

Lee, Young Wook ^{[8
]}

Gao, Lei ^{[9
]}

Huang, Hongwen ^{[9
]}

Paek, Seung Min ^{[1
,2
]}

Jo, Youn-Jung ^{[4
]}

Choi, Chang Hyuck ^{[10
]}

Han, Sang Woo ^{[11
,12
]}

Choi, Sang-Il ^{[1
,2
,13
]}

机构：

[1] Kyungpook Natl Univ, Dept Chem, Daegu 41566, South Korea

[2] Kyungpook Natl Univ, Green Nano Mat Res Ctr, Daegu 41566, South Korea

[3] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Gwangju 61005, South Korea

[4] Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea

[5] Heterogeneous Catalysis PJT, LG Chem Res Pk, Daejeon 34122, South Korea

[6] Korea Basic Sci Inst KBSI, Seoul 02841, South Korea

[7] Korea Inst Sci & Technol KIST, Clean Energy Res Ctr, Seoul 02792, South Korea

[8] Gyeongsang Natl Univ, Res Inst Nat Sci, Dept Chem Educ, Jinju 52828, South Korea

[9] Hunan Univ, Minist Educ, Adv Catalyt Engn Res Ctr, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China

[10] Pohang Univ Sci & Technol POSTECH, Dept Chem, Pohang 37673, South Korea

[11] Korea Adv Inst Sci & Technol, Dept Chem, Ctr Nanotecton, Daejeon 34141, South Korea

[12] Korea Adv Inst Sci & Technol, KI Nano Century, Daejeon 34141, South Korea

[13] Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, Daegu 41566, South Korea

来源：

ACS CATALYSIS | 2022年 / 12卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

platinum; cobalt; nanowire; grain boundary; oxygen reduction reaction; ELECTROCATALYSTS; CATALYSTS; EVOLUTION; GROWTH;

D O I：

10.1021/acscatal.1c05766

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Grain boundaries (GBs) are defects in crystal structures, which are in general known to be highly active toward various electrocatalytic reactions. Herein, we identify the adverse behaviors of the GBs for bimetallic platinum-cobalt (Pt-Co) nanocatalysts in the oxygen reduction reaction (ORR). As model catalysts, GB-rich Pt-Co nanowires (Pt-Co GB-NWs) and single-crystalline Pt-Co nanowires (Pt-Co SC-NWs) are synthesized. They have very similar diameters, Pt-to-Co ratios, and Pt-rich surface structures, except for the GB populations, which can be precisely controlled by applying an external magnetic field during their synthesis. The presence of GBs in Pt-Co NWs promotes Co leaching at an applied electrochemical potential, inducing significant changes in the surface Pt-to-Co ratio. The resulting Pt-Co GB-NWs perform only half the ORR activity compared with the Pt-Co SC-NWs. As a result, it is revealed that the surface GB sites are deactivated by causing elemental leaching and may not act as an ORR promoter for the Pt-Co nanowire catalyst.

引用

页码：3516 / 3523

页数：8

共 17 条

[1] Morphology and composition controlled platinum-cobalt alloy nanowires prepared by electrospinning as oxygen reduction catalyst
Higgins, Drew C.
Wang, Rongyue
Hoque, Md. Ariful
Zamani, Pouyan
Abureden, Salah
Chen, Zhongwei
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[2] Platinum and Platinum-Cobalt Nanowires Supported on Carbon Nanospheres as Electrocatalysts for Oxygen Reduction Reaction
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Ramasamy, Ramaraja P.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2016, 163 (06) : F533 - F538
[3] Fabrication of platinum-cobalt nanowires by centrifugal electrospinning as oxygen reduction catalyst for PEMFC
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Wu, Chen-Yu
Chang, Min-Hsing
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[4] Modulating the intrinsic properties of platinum-cobalt nanowires for enhanced electrocatalysis of the oxygen reduction reaction
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Liu, Yongpeng
Yang, Lin
Zhang, Qing
Wei, Juncai
Wang, Xiaolei
Bai, Zhengyu
NEW JOURNAL OF CHEMISTRY, 2022, 46 (17) : 8122 - 8130
[5] Transient Platinum Oxide Formation and Oxygen Reduction on Carbon-Supported Platinum and Platinum-Cobalt Alloy Electrocatalysts
Huang, Yan
Zhang, Junliang
Kongkanand, Anusorn
Wagner, Frederick T.
Li, James C. M.
Jorne, Jacob
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2014, 161 (01) : F10 - F15
[6] Effect of oxide film on oxygen reduction current for the platinum-cobalt alloy electrodes in PEFC
Tamura, Yuichi
Taneda, Kento
Ueda, Mikito
Ohtsuka, Toshiaki
CORROSION SCIENCE, 2009, 51 (07) : 1560 - 1564
[7] Highly Durable Platinum-Cobalt Nanowires by Microwave Irradiation as Oxygen Reduction Catalyst for PEM Fuel Cell
Higgins, Drew C.
Ye, Siyu
Knights, Shanna
Chen, Zhongwei
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2012, 15 (06) : B83 - B85
[8] Tensile-Strained Platinum-Cobalt Alloy Surface on Palladium Octahedra as a Highly Durable Oxygen Reduction Catalyst
Zhang, Wencong
Li, Fan
Shi, Fenglei
Hu, Hao
Liang, Jing
Yang, Haiyan
Ye, Yaoli
Mao, Zhengsong
Shang, Wen
Deng, Tao
Ke, Xiaoxing
Wu, Jianbo
ACS APPLIED MATERIALS & INTERFACES, 2023, 15 (03) : 3993 - 4000
[9] Catalytic activity of platinum-cobalt alloy nanoparticles decorated functionalized multiwalled carbon nanotubes for oxygen reduction reaction in PEMFC
Vinayan, B. P.
Jafri, R. Imran
Nagar, Rupali
Rajalakshmi, N.
Sethupathi, K.
Ramaprabhu, S.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2012, 37 (01) : 412 - 421
[10] Preparation of low-platinum-content platinum-nickel, platinum-cobalt binary alloy and platinum-nickel-cobalt ternary alloy catalysts for oxygen reduction reaction in polymer electrolyte fuel cells
Li, Mu
Lei, Yanhua
Sheng, Nan
Ohtsuka, Toshiaki
JOURNAL OF POWER SOURCES, 2015, 294 : 420 - 429

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