Tailoring Ruthenium Exposure to Enhance the Performance of fcc Platinum@Ruthenium Core-Shell Electrocatalysts in the Oxygen Evolution Reaction

Noktan Mohammed AlYami; Alec P. LaGrow; Khurram Joya; Jinyeon Hwang; Khabiboulakh Katsiev; Dalaver H. Anjum; Yaroslav Losovyj; Lutfan Sinatra; Jin Young Kim; Osman Bakr

doi:10.1039/C6CP01401A

Tailoring Ruthenium Exposure to Enhance the Performance of fcc Platinum@Ruthenium Core-Shell Electrocatalysts in the Oxygen Evolution Reaction

Noktan Mohammed AlYami, Alec P. LaGrow, Khurram Joya, Jinyeon Hwang, Khabiboulakh Katsiev, Dalaver H. Anjum, Yaroslav Losovyj, Lutfan Sinatra, Jin Young Kim, Osman Bakr

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

The catalytic properties of noble metal nanocrystals are a function of their size, structure, and surface composition. In particular, achieving high activity without sacrificing stability is essential for designing commercially viable catalysts. A major challenge in designing state-of-the-art Ru-based catalysts for the oxygen evolution reaction (OER), which is a key step in water splitting, is the poor stability and surface tailorability of these catalysts. In this study, we designed rapidly synthesizable size-controlled, morphology-selective, and surface-tailored platinum-ruthenium core-shell (Pt@Ru) and alloy (PtRu) nanocatalysts in a scalable continuous-flow reactor. These core-shell nanoparticles with atomically precise shells were produced in a single synthetic step with carbon monoxide as the reducing agent. By varying the metal precursor concentration, a dendritic or layer-by-layer ruthenium shell can be grown. The catalytic activities of the synthesized Pt@Ru and PtRu nanoparticles exhibit noticeably higher electrocatalytic activity in the OER compared to that of pure Pt and Ru nanoparticles. Promisingly, Pt@Ru nanocrystals with a ~2-3 atomic layer Ru cuboctahedral shell surpass conventional Ru nanoparticles in terms of both durability and activity.

Original language	English (US)
Pages (from-to)	16169-16178
Number of pages	10
Journal	Phys. Chem. Chem. Phys.
Volume	18
Issue number	24
DOIs	https://doi.org/10.1039/C6CP01401A
State	Published - 2016

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Author Contributions: All of the authors approved the final
version of the manuscript. N.M.A. designed the synthetic
procedure. N.M.A. performed the TEM and XRD. N.M.A., A.P.L.
and D.H.A. conducted the STEM and STEM-EDS mapping. Y.L.
and Kh.K. performed XPS. N.M.A. and A.P.L. hypothesized the
growth mechanism. N.M.A., K.S.J., J.H., L.S. and J.Y.K. executed
the electrochemical measurements and analysis. N.M.A. wrote
the manuscript and carried out the analyses. All authors contributed to the discussion and interpretation of the results.
We thank Prof. Kazuhiro Takanabe for the use of his lab to
conduct the electrochemical experiments. Access to XPS at the
Nanoscale Characterization Facility at IU-B Chemistry was
provided by NSF Award DMR MRI-1126394.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/C6CP01401A

https://repository.kaust.edu.sa/bitstream/10754/611215/1/c6cp01401a.pdf

Cite this

@article{4e069d9d74ac4504ae4250cc87ff6c87,

title = "Tailoring Ruthenium Exposure to Enhance the Performance of fcc Platinum@Ruthenium Core-Shell Electrocatalysts in the Oxygen Evolution Reaction",

abstract = "The catalytic properties of noble metal nanocrystals are a function of their size, structure, and surface composition. In particular, achieving high activity without sacrificing stability is essential for designing commercially viable catalysts. A major challenge in designing state-of-the-art Ru-based catalysts for the oxygen evolution reaction (OER), which is a key step in water splitting, is the poor stability and surface tailorability of these catalysts. In this study, we designed rapidly synthesizable size-controlled, morphology-selective, and surface-tailored platinum-ruthenium core-shell (Pt@Ru) and alloy (PtRu) nanocatalysts in a scalable continuous-flow reactor. These core-shell nanoparticles with atomically precise shells were produced in a single synthetic step with carbon monoxide as the reducing agent. By varying the metal precursor concentration, a dendritic or layer-by-layer ruthenium shell can be grown. The catalytic activities of the synthesized Pt@Ru and PtRu nanoparticles exhibit noticeably higher electrocatalytic activity in the OER compared to that of pure Pt and Ru nanoparticles. Promisingly, Pt@Ru nanocrystals with a ~2-3 atomic layer Ru cuboctahedral shell surpass conventional Ru nanoparticles in terms of both durability and activity.",

author = "AlYami, {Noktan Mohammed} and LaGrow, {Alec P.} and Khurram Joya and Jinyeon Hwang and Khabiboulakh Katsiev and Anjum, {Dalaver H.} and Yaroslav Losovyj and Lutfan Sinatra and Kim, {Jin Young} and Osman Bakr",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: Author Contributions: All of the authors approved the final version of the manuscript. N.M.A. designed the synthetic procedure. N.M.A. performed the TEM and XRD. N.M.A., A.P.L. and D.H.A. conducted the STEM and STEM-EDS mapping. Y.L. and Kh.K. performed XPS. N.M.A. and A.P.L. hypothesized the growth mechanism. N.M.A., K.S.J., J.H., L.S. and J.Y.K. executed the electrochemical measurements and analysis. N.M.A. wrote the manuscript and carried out the analyses. All authors contributed to the discussion and interpretation of the results. We thank Prof. Kazuhiro Takanabe for the use of his lab to conduct the electrochemical experiments. Access to XPS at the Nanoscale Characterization Facility at IU-B Chemistry was provided by NSF Award DMR MRI-1126394.",

year = "2016",

doi = "10.1039/C6CP01401A",

language = "English (US)",

volume = "18",

pages = "16169--16178",

journal = "Phys. Chem. Chem. Phys.",

issn = "1463-9076",

publisher = "Royal Society of Chemistry",

number = "24",

}

TY - JOUR

T1 - Tailoring Ruthenium Exposure to Enhance the Performance of fcc Platinum@Ruthenium Core-Shell Electrocatalysts in the Oxygen Evolution Reaction

AU - AlYami, Noktan Mohammed

AU - LaGrow, Alec P.

AU - Joya, Khurram

AU - Hwang, Jinyeon

AU - Katsiev, Khabiboulakh

AU - Anjum, Dalaver H.

AU - Losovyj, Yaroslav

AU - Sinatra, Lutfan

AU - Kim, Jin Young

AU - Bakr, Osman

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: Author Contributions: All of the authors approved the final version of the manuscript. N.M.A. designed the synthetic procedure. N.M.A. performed the TEM and XRD. N.M.A., A.P.L. and D.H.A. conducted the STEM and STEM-EDS mapping. Y.L. and Kh.K. performed XPS. N.M.A. and A.P.L. hypothesized the growth mechanism. N.M.A., K.S.J., J.H., L.S. and J.Y.K. executed the electrochemical measurements and analysis. N.M.A. wrote the manuscript and carried out the analyses. All authors contributed to the discussion and interpretation of the results. We thank Prof. Kazuhiro Takanabe for the use of his lab to conduct the electrochemical experiments. Access to XPS at the Nanoscale Characterization Facility at IU-B Chemistry was provided by NSF Award DMR MRI-1126394.

PY - 2016

Y1 - 2016

N2 - The catalytic properties of noble metal nanocrystals are a function of their size, structure, and surface composition. In particular, achieving high activity without sacrificing stability is essential for designing commercially viable catalysts. A major challenge in designing state-of-the-art Ru-based catalysts for the oxygen evolution reaction (OER), which is a key step in water splitting, is the poor stability and surface tailorability of these catalysts. In this study, we designed rapidly synthesizable size-controlled, morphology-selective, and surface-tailored platinum-ruthenium core-shell (Pt@Ru) and alloy (PtRu) nanocatalysts in a scalable continuous-flow reactor. These core-shell nanoparticles with atomically precise shells were produced in a single synthetic step with carbon monoxide as the reducing agent. By varying the metal precursor concentration, a dendritic or layer-by-layer ruthenium shell can be grown. The catalytic activities of the synthesized Pt@Ru and PtRu nanoparticles exhibit noticeably higher electrocatalytic activity in the OER compared to that of pure Pt and Ru nanoparticles. Promisingly, Pt@Ru nanocrystals with a ~2-3 atomic layer Ru cuboctahedral shell surpass conventional Ru nanoparticles in terms of both durability and activity.

AB - The catalytic properties of noble metal nanocrystals are a function of their size, structure, and surface composition. In particular, achieving high activity without sacrificing stability is essential for designing commercially viable catalysts. A major challenge in designing state-of-the-art Ru-based catalysts for the oxygen evolution reaction (OER), which is a key step in water splitting, is the poor stability and surface tailorability of these catalysts. In this study, we designed rapidly synthesizable size-controlled, morphology-selective, and surface-tailored platinum-ruthenium core-shell (Pt@Ru) and alloy (PtRu) nanocatalysts in a scalable continuous-flow reactor. These core-shell nanoparticles with atomically precise shells were produced in a single synthetic step with carbon monoxide as the reducing agent. By varying the metal precursor concentration, a dendritic or layer-by-layer ruthenium shell can be grown. The catalytic activities of the synthesized Pt@Ru and PtRu nanoparticles exhibit noticeably higher electrocatalytic activity in the OER compared to that of pure Pt and Ru nanoparticles. Promisingly, Pt@Ru nanocrystals with a ~2-3 atomic layer Ru cuboctahedral shell surpass conventional Ru nanoparticles in terms of both durability and activity.

UR - http://hdl.handle.net/10754/611215

UR - http://pubs.rsc.org/en/Content/ArticleLanding/2016/CP/C6CP01401A

UR - http://www.scopus.com/inward/record.url?scp=84975156661&partnerID=8YFLogxK

U2 - 10.1039/C6CP01401A

DO - 10.1039/C6CP01401A

M3 - Article

C2 - 27242173

SN - 1463-9076

VL - 18

SP - 16169

EP - 16178

JO - Phys. Chem. Chem. Phys.

JF - Phys. Chem. Chem. Phys.

IS - 24

ER -

Tailoring Ruthenium Exposure to Enhance the Performance of fcc Platinum@Ruthenium Core-Shell Electrocatalysts in the Oxygen Evolution Reaction

Abstract

Bibliographical note

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this