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NATURE COMMUNICATIONS, Volume: 9, MAR 8 2018

Nanoscale kinetics od asymmetrical corrosion in core-shell nanoparticles

By:Shan, H (Shan, Hao)[ 1 ] ; Gao, WP (Gao, Wenpei)[ 2 ] ; Xiong, YL (Xiong, Yalin)[ 3,4 ] ; Shi, FL (Shi, Fenglei)[ 1 ] ; Yan, YC (Yan, Yucong)[ 3 ] ; Ma, YL (Ma, Yanling)[ 1 ] ; Shang, W (Shang, Wen)[ 1 ] ; Tao, P (Tao, Peng)[ 1 ] ; Song, CY (Song, Chengyi)[ 1 ] ; Deng, T (Deng, Tao)[ 1 ] ; Zhang, H (Zhang, Hui)[ 3 ] ; Yang, DR(Yang, Deren)[ 3 ] ; Pan, XQ (Pan, Xiaoqing)[ 2,5 ] ; Wu, JB (Wu, Jianbo)[ 1 ] 

 

NATURE COMMUNICATIONS, Volume: 9, Article Number: 1011, DOI: 10.1038/s41467-018-03372-z, Published: MAR 8 2018

Document Type:Article

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Abstract

Designing new materials and structure to sustain the corrosion during operation requires better understanding on the corrosion dynamics. Observation on how the corrosion proceeds in atomic scale is thus critical. Here, using a liquid cell, we studied the real-time corrosion process of palladium@platinum (Pd@Pt) core-shell nanocubes via transmission electron microscopy (TEM). The results revealed that multiple etching pathways operatively contribute to the morphology evolution during corrosion, including galvanic etching on non-defected sites with slow kinetics and halogen-induced etching at defected sites at faster rates. Corners are the preferential corrosion sites; both etching pathways are mutually restricted during corrosion. Those insights on the interaction of nanostructures with reactive liquid environments can help better engineer the surface structure to improve the stability of electrocatalysts as well as design a new porous structure that may provide more active sites for catalysis.

Keywords

KeyWords Plus:OXYGEN REDUCTION REACTIONROTATING-DISK ELECTRODECOLLOIDAL METAL NANOCRYSTALSFUEL-CELL ELECTROCATALYSTSSHAPE-CONTROLLED SYNTHESISBY-LAYER DEPOSITIONPT-BASED CATALYSTSENHANCED ACTIVITYPLATINUM NANOCRYSTALSPD

Author Information

Reprint Address: Wu, JB (reprint author)


Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, 800 Dongchuan Rd, Shanghai 200240, Peoples R China.

Reprint Address: Pan, XQ (reprint author)


Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA.

Reprint Address: Zhang, H (reprint author)


Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China.

Reprint Address: Pan, XQ (reprint author)


Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.

 

Addresses:


[ 1 ] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, 800 Dongchuan Rd, Shanghai 200240, Peoples R China


[ 2 ] Univ Calif Irvine, Dept Chem Engn & Mat Sci, Irvine, CA 92697 USA


[ 3 ] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

      
[ 4 ] Natl Inst Clean & Low Carbon Energy, Hydrogen Energy R&D Dept, Chem & Phys Ctr, Beijing 102211, Peoples R China


[ 5 ] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

 

E-mail Addresses:msezhanghui@zju.edu.cnxiaoqing.pan@uci.edujianbowu@sjtu.edu.cn

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