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Title: Formation of Branched Ruthenium Nanoparticles for Improved Electrocatalysis of Oxygen Evolution Reaction

Abstract

Branched nanoparticles are one of the most promising nanoparticle catalysts as their branch sizes and surfaces can be tuned to enable both high activity and stability. Understanding how the crystallinity and surface facets of branched nanoparticles affect their catalytic performance is vital for further catalyst development. In this work, a synthesis is developed to form highly branched ruthenium (Ru) nanoparticles with control of crystallinity. It is shown that faceted Ru branched nanoparticles have improved stability and activity in the oxygen evolution reaction (OER) compared with polycrystalline Ru nanoparticles. Here, this work achieves a low 180 mV overpotential at 10 mA cm–2 for hours, demonstrating that record–high stability for Ru nanocrystals can be achieved while retaining high activity for OER. The superior electrocatalytic performance of faceted Ru branched nanoparticles is ascribed to the lower Ru dissolution rate under OER conditions due to low–index facets on the branch surfaces.

Authors:
 [1];  [1];  [1];  [2];  [3]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1]
  1. The Univ. of New South Wales, Sydney, NSW (Australia)
  2. The Univ. of New South Wales, NSW (Australia)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22); Australian Research Council Linkage; Australian Laureate Fellowship; J.J.G and a Discovery Project; USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1601419
Alternate Identifier(s):
OSTI ID: 1503065
Report Number(s):
LA-UR-19-29669
Journal ID: ISSN 1613-6810
Grant/Contract Number:  
89233218CNA000001; LP150101014; FT150100060; DP190102659; NA0003525
Resource Type:
Accepted Manuscript
Journal Name:
Small
Additional Journal Information:
Journal Volume: 15; Journal Issue: 17; Journal ID: ISSN 1613-6810
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; material science; crystallinity; electrocatalysis; nanoparticles; oxygen evolution reaction; ruthenium

Citation Formats

Poerwoprajitno, Agus R., Gloag, Lucy, Benedetti, Tania M., Cheong, Soshan, Watt, John, Huber, Dale L., Gooding, J. Justin, and Tilley, Richard D. Formation of Branched Ruthenium Nanoparticles for Improved Electrocatalysis of Oxygen Evolution Reaction. United States: N. p., 2019. Web. doi:10.1002/smll.201804577.
Poerwoprajitno, Agus R., Gloag, Lucy, Benedetti, Tania M., Cheong, Soshan, Watt, John, Huber, Dale L., Gooding, J. Justin, & Tilley, Richard D. Formation of Branched Ruthenium Nanoparticles for Improved Electrocatalysis of Oxygen Evolution Reaction. United States. doi:10.1002/smll.201804577.
Poerwoprajitno, Agus R., Gloag, Lucy, Benedetti, Tania M., Cheong, Soshan, Watt, John, Huber, Dale L., Gooding, J. Justin, and Tilley, Richard D. Tue . "Formation of Branched Ruthenium Nanoparticles for Improved Electrocatalysis of Oxygen Evolution Reaction". United States. doi:10.1002/smll.201804577. https://www.osti.gov/servlets/purl/1601419.
@article{osti_1601419,
title = {Formation of Branched Ruthenium Nanoparticles for Improved Electrocatalysis of Oxygen Evolution Reaction},
author = {Poerwoprajitno, Agus R. and Gloag, Lucy and Benedetti, Tania M. and Cheong, Soshan and Watt, John and Huber, Dale L. and Gooding, J. Justin and Tilley, Richard D.},
abstractNote = {Branched nanoparticles are one of the most promising nanoparticle catalysts as their branch sizes and surfaces can be tuned to enable both high activity and stability. Understanding how the crystallinity and surface facets of branched nanoparticles affect their catalytic performance is vital for further catalyst development. In this work, a synthesis is developed to form highly branched ruthenium (Ru) nanoparticles with control of crystallinity. It is shown that faceted Ru branched nanoparticles have improved stability and activity in the oxygen evolution reaction (OER) compared with polycrystalline Ru nanoparticles. Here, this work achieves a low 180 mV overpotential at 10 mA cm–2 for hours, demonstrating that record–high stability for Ru nanocrystals can be achieved while retaining high activity for OER. The superior electrocatalytic performance of faceted Ru branched nanoparticles is ascribed to the lower Ru dissolution rate under OER conditions due to low–index facets on the branch surfaces.},
doi = {10.1002/smll.201804577},
journal = {Small},
number = 17,
volume = 15,
place = {United States},
year = {2019},
month = {3}
}

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Cited by: 7 works
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