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Title: Pt–Ni Seed-Core-Frame Hierarchical Nanostructures and Their Conversion to Nanoframes for Enhanced Methanol Electro-Oxidation

Abstract

Pt–Ni nanostructures are a class of important electrocatalysts for polymer electrolyte membrane fuel cells. This work reports a systematic study on the reaction mechanism of the formation of Pt–Ni seed-core-frame nanostructures via the seeded co-reduction method involving the Pt seeds and selective co-reduced deposition of Pt and Ni. The resultant structure consists of a branched Pt ultrafine seed coated with a pure Ni as rhombic dodecahedral core and selective deposition of Pt on the edges of the cores. Both the type of Pt precursor and the precursor ratio of Pt/Ni are critical factors to form the resulting shape of the seeds and eventually the morphology of the nanostructures. These complex hierarchical structures can be further graved into hollow Pt–Ni alloy nanoframes using acetic acid etching method. The larger surface area and higher number of low coordinate sites of the nanoframes facilitate the electrocatalytic activity and stability of Pt–Ni alloy for methanol oxidation as compared to their solid counterparts. This study elucidates the structural and compositional evolution of the complex nanoarchitectures and their effects on the electrocatalytic properties of the nanostructures.

Authors:
 [1];  [1]; ORCiD logo [2];  [2];  [2]; ORCiD logo [1]
  1. Univ. of Arkansas, Fayetteville, AR (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1507112
Report Number(s):
BNL-211541-2019-JAAM
Journal ID: ISSN 2073-4344; CATACJ
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Catalysts
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2073-4344
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; bimetallic nanoparticles; platinum; nickel; electrocatalysis

Citation Formats

Chen, Shutang, Wu, Haibin, Tao, Jing, Xin, Huolin, Zhu, Yimei, and Chen, Jingyi. Pt–Ni Seed-Core-Frame Hierarchical Nanostructures and Their Conversion to Nanoframes for Enhanced Methanol Electro-Oxidation. United States: N. p., 2019. Web. doi:10.3390/catal9010039.
Chen, Shutang, Wu, Haibin, Tao, Jing, Xin, Huolin, Zhu, Yimei, & Chen, Jingyi. Pt–Ni Seed-Core-Frame Hierarchical Nanostructures and Their Conversion to Nanoframes for Enhanced Methanol Electro-Oxidation. United States. doi:10.3390/catal9010039.
Chen, Shutang, Wu, Haibin, Tao, Jing, Xin, Huolin, Zhu, Yimei, and Chen, Jingyi. Thu . "Pt–Ni Seed-Core-Frame Hierarchical Nanostructures and Their Conversion to Nanoframes for Enhanced Methanol Electro-Oxidation". United States. doi:10.3390/catal9010039. https://www.osti.gov/servlets/purl/1507112.
@article{osti_1507112,
title = {Pt–Ni Seed-Core-Frame Hierarchical Nanostructures and Their Conversion to Nanoframes for Enhanced Methanol Electro-Oxidation},
author = {Chen, Shutang and Wu, Haibin and Tao, Jing and Xin, Huolin and Zhu, Yimei and Chen, Jingyi},
abstractNote = {Pt–Ni nanostructures are a class of important electrocatalysts for polymer electrolyte membrane fuel cells. This work reports a systematic study on the reaction mechanism of the formation of Pt–Ni seed-core-frame nanostructures via the seeded co-reduction method involving the Pt seeds and selective co-reduced deposition of Pt and Ni. The resultant structure consists of a branched Pt ultrafine seed coated with a pure Ni as rhombic dodecahedral core and selective deposition of Pt on the edges of the cores. Both the type of Pt precursor and the precursor ratio of Pt/Ni are critical factors to form the resulting shape of the seeds and eventually the morphology of the nanostructures. These complex hierarchical structures can be further graved into hollow Pt–Ni alloy nanoframes using acetic acid etching method. The larger surface area and higher number of low coordinate sites of the nanoframes facilitate the electrocatalytic activity and stability of Pt–Ni alloy for methanol oxidation as compared to their solid counterparts. This study elucidates the structural and compositional evolution of the complex nanoarchitectures and their effects on the electrocatalytic properties of the nanostructures.},
doi = {10.3390/catal9010039},
journal = {Catalysts},
number = 1,
volume = 9,
place = {United States},
year = {2019},
month = {1}
}

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    Works referencing / citing this record:

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    Noble Metal Based Alloy Nanoframes: Syntheses and Applications in Fuel Cells
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