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Title: Tailoring the Surface Structures of CuPt and CuPtRu 1D Nanostructures by Coupling Coreduction with Galvanic Replacement

Abstract

Abstract 1D metal nanostructures exhibit unique properties due to their high aspect ratio for use in many applications including electrocatalysis. This work develops a solution‐based approach to 1D multimetal nanostructures with tunable surface structures by combining the two processes of coreduction and galvanic replacement. In this approach, noble metals of Pt and Ru are reduced in the presence of in situ formed Cu seeds. At high concentrations of noble metal precursors, coreduction dominates over galvanic replacement, leading to overgrowth of ultrafine, particulate, or branched structures on the surface of the 1D nanostructures. The surface roughness and composition can be tuned by varying the concentrations of noble metal precursors. The electrochemical reactivity is not only affected by the surface roughness (i.e., the size of particulates and the level of branches) but also the surface composition (i.e., the amount of Pt content). For trimetallic nanostructures, the alloy composition prevents the dissolution of Ru thereby improving electrocatalytic stability of the catalyst under acidic conditions. The structure–property study reveals that the surface structure plays an important role in tailoring the electrocatalytic property of a catalyst.

Authors:
 [1];  [2];  [3]; ORCiD logo [3]; ORCiD logo [1]
+ Show Author Affiliations
  1. Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Chemistry and Biochemistry
  2. Univ. of Arkansas, Fayetteville, AR (United States). Inst. of Nanoscience and Engineering
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1462413
Alternate Identifier(s):
OSTI ID: 1439751
Report Number(s):
BNL-207896-2018-JAAM
Journal ID: ISSN 0934-0866
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Particle & Particle Systems Characterization
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5; Journal ID: ISSN 0934-0866
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; bimetallic nanostructures; nanowires; electrocatalysis; methanol oxidation reaction; shape-controlled synthesis

Citation Formats

Mathurin, Leanne E., Benamara, Mourad, Tao, Jing, Zhu, Yimei, and Chen, Jingyi. Tailoring the Surface Structures of CuPt and CuPtRu 1D Nanostructures by Coupling Coreduction with Galvanic Replacement. United States: N. p., 2018. Web. doi:10.1002/ppsc.201800053.
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Mathurin, Leanne E., Benamara, Mourad, Tao, Jing, Zhu, Yimei, & Chen, Jingyi. Tailoring the Surface Structures of CuPt and CuPtRu 1D Nanostructures by Coupling Coreduction with Galvanic Replacement. United States. https://doi.org/10.1002/ppsc.201800053
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Mathurin, Leanne E., Benamara, Mourad, Tao, Jing, Zhu, Yimei, and Chen, Jingyi. Tue . "Tailoring the Surface Structures of CuPt and CuPtRu 1D Nanostructures by Coupling Coreduction with Galvanic Replacement". United States. https://doi.org/10.1002/ppsc.201800053. https://www.osti.gov/servlets/purl/1462413.
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@article{osti_1462413,
title = {Tailoring the Surface Structures of CuPt and CuPtRu 1D Nanostructures by Coupling Coreduction with Galvanic Replacement},
author = {Mathurin, Leanne E. and Benamara, Mourad and Tao, Jing and Zhu, Yimei and Chen, Jingyi},
abstractNote = {Abstract 1D metal nanostructures exhibit unique properties due to their high aspect ratio for use in many applications including electrocatalysis. This work develops a solution‐based approach to 1D multimetal nanostructures with tunable surface structures by combining the two processes of coreduction and galvanic replacement. In this approach, noble metals of Pt and Ru are reduced in the presence of in situ formed Cu seeds. At high concentrations of noble metal precursors, coreduction dominates over galvanic replacement, leading to overgrowth of ultrafine, particulate, or branched structures on the surface of the 1D nanostructures. The surface roughness and composition can be tuned by varying the concentrations of noble metal precursors. The electrochemical reactivity is not only affected by the surface roughness (i.e., the size of particulates and the level of branches) but also the surface composition (i.e., the amount of Pt content). For trimetallic nanostructures, the alloy composition prevents the dissolution of Ru thereby improving electrocatalytic stability of the catalyst under acidic conditions. The structure–property study reveals that the surface structure plays an important role in tailoring the electrocatalytic property of a catalyst.},
doi = {10.1002/ppsc.201800053},
journal = {Particle & Particle Systems Characterization},
number = 5,
volume = 35,
place = {United States},
year = {Tue Apr 24 00:00:00 EDT 2018},
month = {Tue Apr 24 00:00:00 EDT 2018}
}
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Publisher's Version of Record
https://doi.org/10.1002/ppsc.201800053
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