Scaffold-like titanium nitride nanotubes with a highly conductive porous architecture as a nanoparticle catalyst support for oxygen reduction

Heejong Shin, Hyoungil Kim, Dong Young Chung, Ji Mun Yoo, Seunghyun Weon, Wonyong Choi, Yung Eun Sung

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We designed a scaffold-like porous titanium nitride (TiN) nanotube (NT) as a catalyst support for Pt to facilitate the oxygen reduction reaction. Bulk titanium nitride, which is known as an electrically conductive material, is compatible with other metals. As the size of TiN particles decreases, however, they lose their intrinsic high electrical conductivity, due to a series of nanoparticle grain boundaries acting as electron reservoirs and traps. A designed grain-boundary-free scaffold-like porous TiN NT which is analogous to the shape of the one-dimensional porous human spine exhibits high electrical conductivity in spite of having a surface area similar to that of TiN nanoparticle (NPs). The electrical conductivity of TiN NTs is ca. 30-fold higher than that of spherical TiN NPs. The electrochemical oxygen reduction measurements between porous TiN NT and TiN NPs after Pt loading clearly exhibit the superiority of TiN NT as a catalyst support. The results from various electrochemical measurements suggest that the electrocatalytic activity per site did not change from a kinetic viewpoint, but the utilization (the amount of triggered catalytic active sites) in the catalyst layer on the electrode decreased. The Pt/TiN NT composite catalyst exhibited higher activity in comparison to TiN NPs as well as conventional Pt/C catalysts. The accelerated durability test (ADT) revealed that this nanotubular supporting material dramatically enhanced the durability of the catalyst and maintained the electrochemically active surface area (ECSA) of Pt nanoparticles, thus exhibiting performance higher than that of the commercial Pt/C catalyst. X-ray spectroscopy results verified the strong metal-support interaction between Pt nanoparticles and the TiN NT support. This approach opens a reliable path for designing innovative transition-metal oxides, nitrides, or carbides as catalyst supports for use in a wide range of energy conversion applications.

Original languageEnglish
Pages (from-to)3914-3920
Number of pages7
JournalACS Catalysis
Volume6
Issue number6
DOIs
Publication statusPublished - 2016 Jun 3

Fingerprint

Titanium nitride
Catalyst supports
Scaffolds
Nanotubes
Oxygen
Nanoparticles
Catalysts
titanium nitride
Grain boundaries
Durability
Metals
Conductive materials
X ray spectroscopy
Energy conversion
Nitrides
Oxides
Transition metals
Carbides

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Shin, Heejong ; Kim, Hyoungil ; Chung, Dong Young ; Yoo, Ji Mun ; Weon, Seunghyun ; Choi, Wonyong ; Sung, Yung Eun. / Scaffold-like titanium nitride nanotubes with a highly conductive porous architecture as a nanoparticle catalyst support for oxygen reduction. In: ACS Catalysis. 2016 ; Vol. 6, No. 6. pp. 3914-3920.
@article{3fe667ccf4b14692b35442c4fda5ea92,
title = "Scaffold-like titanium nitride nanotubes with a highly conductive porous architecture as a nanoparticle catalyst support for oxygen reduction",
abstract = "We designed a scaffold-like porous titanium nitride (TiN) nanotube (NT) as a catalyst support for Pt to facilitate the oxygen reduction reaction. Bulk titanium nitride, which is known as an electrically conductive material, is compatible with other metals. As the size of TiN particles decreases, however, they lose their intrinsic high electrical conductivity, due to a series of nanoparticle grain boundaries acting as electron reservoirs and traps. A designed grain-boundary-free scaffold-like porous TiN NT which is analogous to the shape of the one-dimensional porous human spine exhibits high electrical conductivity in spite of having a surface area similar to that of TiN nanoparticle (NPs). The electrical conductivity of TiN NTs is ca. 30-fold higher than that of spherical TiN NPs. The electrochemical oxygen reduction measurements between porous TiN NT and TiN NPs after Pt loading clearly exhibit the superiority of TiN NT as a catalyst support. The results from various electrochemical measurements suggest that the electrocatalytic activity per site did not change from a kinetic viewpoint, but the utilization (the amount of triggered catalytic active sites) in the catalyst layer on the electrode decreased. The Pt/TiN NT composite catalyst exhibited higher activity in comparison to TiN NPs as well as conventional Pt/C catalysts. The accelerated durability test (ADT) revealed that this nanotubular supporting material dramatically enhanced the durability of the catalyst and maintained the electrochemically active surface area (ECSA) of Pt nanoparticles, thus exhibiting performance higher than that of the commercial Pt/C catalyst. X-ray spectroscopy results verified the strong metal-support interaction between Pt nanoparticles and the TiN NT support. This approach opens a reliable path for designing innovative transition-metal oxides, nitrides, or carbides as catalyst supports for use in a wide range of energy conversion applications.",
author = "Heejong Shin and Hyoungil Kim and Chung, {Dong Young} and Yoo, {Ji Mun} and Seunghyun Weon and Wonyong Choi and Sung, {Yung Eun}",
year = "2016",
month = "6",
day = "3",
doi = "10.1021/acscatal.6b00384",
language = "English",
volume = "6",
pages = "3914--3920",
journal = "ACS Catalysis",
issn = "2155-5435",
publisher = "American Chemical Society",
number = "6",

}

Scaffold-like titanium nitride nanotubes with a highly conductive porous architecture as a nanoparticle catalyst support for oxygen reduction. / Shin, Heejong; Kim, Hyoungil; Chung, Dong Young; Yoo, Ji Mun; Weon, Seunghyun; Choi, Wonyong; Sung, Yung Eun.

In: ACS Catalysis, Vol. 6, No. 6, 03.06.2016, p. 3914-3920.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Scaffold-like titanium nitride nanotubes with a highly conductive porous architecture as a nanoparticle catalyst support for oxygen reduction

AU - Shin, Heejong

AU - Kim, Hyoungil

AU - Chung, Dong Young

AU - Yoo, Ji Mun

AU - Weon, Seunghyun

AU - Choi, Wonyong

AU - Sung, Yung Eun

PY - 2016/6/3

Y1 - 2016/6/3

N2 - We designed a scaffold-like porous titanium nitride (TiN) nanotube (NT) as a catalyst support for Pt to facilitate the oxygen reduction reaction. Bulk titanium nitride, which is known as an electrically conductive material, is compatible with other metals. As the size of TiN particles decreases, however, they lose their intrinsic high electrical conductivity, due to a series of nanoparticle grain boundaries acting as electron reservoirs and traps. A designed grain-boundary-free scaffold-like porous TiN NT which is analogous to the shape of the one-dimensional porous human spine exhibits high electrical conductivity in spite of having a surface area similar to that of TiN nanoparticle (NPs). The electrical conductivity of TiN NTs is ca. 30-fold higher than that of spherical TiN NPs. The electrochemical oxygen reduction measurements between porous TiN NT and TiN NPs after Pt loading clearly exhibit the superiority of TiN NT as a catalyst support. The results from various electrochemical measurements suggest that the electrocatalytic activity per site did not change from a kinetic viewpoint, but the utilization (the amount of triggered catalytic active sites) in the catalyst layer on the electrode decreased. The Pt/TiN NT composite catalyst exhibited higher activity in comparison to TiN NPs as well as conventional Pt/C catalysts. The accelerated durability test (ADT) revealed that this nanotubular supporting material dramatically enhanced the durability of the catalyst and maintained the electrochemically active surface area (ECSA) of Pt nanoparticles, thus exhibiting performance higher than that of the commercial Pt/C catalyst. X-ray spectroscopy results verified the strong metal-support interaction between Pt nanoparticles and the TiN NT support. This approach opens a reliable path for designing innovative transition-metal oxides, nitrides, or carbides as catalyst supports for use in a wide range of energy conversion applications.

AB - We designed a scaffold-like porous titanium nitride (TiN) nanotube (NT) as a catalyst support for Pt to facilitate the oxygen reduction reaction. Bulk titanium nitride, which is known as an electrically conductive material, is compatible with other metals. As the size of TiN particles decreases, however, they lose their intrinsic high electrical conductivity, due to a series of nanoparticle grain boundaries acting as electron reservoirs and traps. A designed grain-boundary-free scaffold-like porous TiN NT which is analogous to the shape of the one-dimensional porous human spine exhibits high electrical conductivity in spite of having a surface area similar to that of TiN nanoparticle (NPs). The electrical conductivity of TiN NTs is ca. 30-fold higher than that of spherical TiN NPs. The electrochemical oxygen reduction measurements between porous TiN NT and TiN NPs after Pt loading clearly exhibit the superiority of TiN NT as a catalyst support. The results from various electrochemical measurements suggest that the electrocatalytic activity per site did not change from a kinetic viewpoint, but the utilization (the amount of triggered catalytic active sites) in the catalyst layer on the electrode decreased. The Pt/TiN NT composite catalyst exhibited higher activity in comparison to TiN NPs as well as conventional Pt/C catalysts. The accelerated durability test (ADT) revealed that this nanotubular supporting material dramatically enhanced the durability of the catalyst and maintained the electrochemically active surface area (ECSA) of Pt nanoparticles, thus exhibiting performance higher than that of the commercial Pt/C catalyst. X-ray spectroscopy results verified the strong metal-support interaction between Pt nanoparticles and the TiN NT support. This approach opens a reliable path for designing innovative transition-metal oxides, nitrides, or carbides as catalyst supports for use in a wide range of energy conversion applications.

UR - http://www.scopus.com/inward/record.url?scp=84973636305&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84973636305&partnerID=8YFLogxK

U2 - 10.1021/acscatal.6b00384

DO - 10.1021/acscatal.6b00384

M3 - Article

VL - 6

SP - 3914

EP - 3920

JO - ACS Catalysis

JF - ACS Catalysis

SN - 2155-5435

IS - 6

ER -