Synergistic effects in atomic-layer-deposited PtCox/CNTs catalysts enhancing hydrolytic dehydrogenation of ammonia borane

Jiankang Zhang; Wenyao Chen; Huibin Ge; Chaoqiu Chen; Wenjun Yan; Zhe Gao; Jie Gan; Baiyan Zhang; Xuezhi Duan; Yong Qin

doi:10.1016/j.apcatb.2018.04.070

Synergistic effects in atomic-layer-deposited PtCox/CNTs catalysts enhancing hydrolytic dehydrogenation of ammonia borane

Jiankang Zhang, Wenyao Chen, Huibin Ge, Chaoqiu Chen, Wenjun Yan, Zhe Gao, Jie Gan, Baiyan Zhang, Xuezhi Duan, Yong Qin

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

127 Scopus citations

Abstract

Highly dispersed and narrowly size-distributed Pt-Co bimetallic nanoparticles supported on CNTs are fabricated by atomic layer deposition (ALD) of Pt followed by CoO ALD for hydrolytic dehydrogenation of ammonia borane. The controlled decoration of CoO significantly enhances the hydrogen evolution activity of the Pt-based catalysts due to the remarkable Pt-Co synergy, i.e., the TOF value is up to 675.1 mol_H2 mol_Pt ⁻¹ min⁻¹ for bimetallic PtCo20/CNTs catalyst, which is 1.8 times higher than that of monometallic Pt/CNTs catalyst. The underlying nature of the Pt-Co synergy is systematically investigated by combining multiple characterizations with kinetic and isotopic analyses. It is revealed that the decoration of CoO onto Pt provides unique Pt-Co interfaces and targeted Pt electronic properties, thereby exhibiting the lower activation energy and favorable O-H bond cleavage being the rate-determining step for the hydrolysis reaction. The insights revealed here provide inspiration and guide for the rational design of other advanced nanocatalysts.

Original language	English
Pages (from-to)	256-263
Number of pages	8
Journal	Applied Catalysis B: Environmental
Volume	235
DOIs	https://doi.org/10.1016/j.apcatb.2018.04.070
State	Published - 5 Nov 2018
Externally published	Yes

Keywords

Ammonia borane
Atomic layer deposition
Hydrogen evolution
Kinetic and isotopic analyses
Pt-Co synergy

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10.1016/j.apcatb.2018.04.070

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@article{f6cb88348c5f492d9632f8892f627aa7,

title = "Synergistic effects in atomic-layer-deposited PtCox/CNTs catalysts enhancing hydrolytic dehydrogenation of ammonia borane",

abstract = "Highly dispersed and narrowly size-distributed Pt-Co bimetallic nanoparticles supported on CNTs are fabricated by atomic layer deposition (ALD) of Pt followed by CoO ALD for hydrolytic dehydrogenation of ammonia borane. The controlled decoration of CoO significantly enhances the hydrogen evolution activity of the Pt-based catalysts due to the remarkable Pt-Co synergy, i.e., the TOF value is up to 675.1 molH2 molPt −1 min−1 for bimetallic PtCo20/CNTs catalyst, which is 1.8 times higher than that of monometallic Pt/CNTs catalyst. The underlying nature of the Pt-Co synergy is systematically investigated by combining multiple characterizations with kinetic and isotopic analyses. It is revealed that the decoration of CoO onto Pt provides unique Pt-Co interfaces and targeted Pt electronic properties, thereby exhibiting the lower activation energy and favorable O-H bond cleavage being the rate-determining step for the hydrolysis reaction. The insights revealed here provide inspiration and guide for the rational design of other advanced nanocatalysts.",

keywords = "Ammonia borane, Atomic layer deposition, Hydrogen evolution, Kinetic and isotopic analyses, Pt-Co synergy",

author = "Jiankang Zhang and Wenyao Chen and Huibin Ge and Chaoqiu Chen and Wenjun Yan and Zhe Gao and Jie Gan and Baiyan Zhang and Xuezhi Duan and Yong Qin",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = nov,

day = "5",

doi = "10.1016/j.apcatb.2018.04.070",

language = "英语",

volume = "235",

pages = "256--263",

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TY - JOUR

T1 - Synergistic effects in atomic-layer-deposited PtCox/CNTs catalysts enhancing hydrolytic dehydrogenation of ammonia borane

AU - Zhang, Jiankang

AU - Chen, Wenyao

AU - Ge, Huibin

AU - Chen, Chaoqiu

AU - Yan, Wenjun

AU - Gao, Zhe

AU - Gan, Jie

AU - Zhang, Baiyan

AU - Duan, Xuezhi

AU - Qin, Yong

PY - 2018/11/5

Y1 - 2018/11/5

N2 - Highly dispersed and narrowly size-distributed Pt-Co bimetallic nanoparticles supported on CNTs are fabricated by atomic layer deposition (ALD) of Pt followed by CoO ALD for hydrolytic dehydrogenation of ammonia borane. The controlled decoration of CoO significantly enhances the hydrogen evolution activity of the Pt-based catalysts due to the remarkable Pt-Co synergy, i.e., the TOF value is up to 675.1 molH2 molPt −1 min−1 for bimetallic PtCo20/CNTs catalyst, which is 1.8 times higher than that of monometallic Pt/CNTs catalyst. The underlying nature of the Pt-Co synergy is systematically investigated by combining multiple characterizations with kinetic and isotopic analyses. It is revealed that the decoration of CoO onto Pt provides unique Pt-Co interfaces and targeted Pt electronic properties, thereby exhibiting the lower activation energy and favorable O-H bond cleavage being the rate-determining step for the hydrolysis reaction. The insights revealed here provide inspiration and guide for the rational design of other advanced nanocatalysts.

AB - Highly dispersed and narrowly size-distributed Pt-Co bimetallic nanoparticles supported on CNTs are fabricated by atomic layer deposition (ALD) of Pt followed by CoO ALD for hydrolytic dehydrogenation of ammonia borane. The controlled decoration of CoO significantly enhances the hydrogen evolution activity of the Pt-based catalysts due to the remarkable Pt-Co synergy, i.e., the TOF value is up to 675.1 molH2 molPt −1 min−1 for bimetallic PtCo20/CNTs catalyst, which is 1.8 times higher than that of monometallic Pt/CNTs catalyst. The underlying nature of the Pt-Co synergy is systematically investigated by combining multiple characterizations with kinetic and isotopic analyses. It is revealed that the decoration of CoO onto Pt provides unique Pt-Co interfaces and targeted Pt electronic properties, thereby exhibiting the lower activation energy and favorable O-H bond cleavage being the rate-determining step for the hydrolysis reaction. The insights revealed here provide inspiration and guide for the rational design of other advanced nanocatalysts.

KW - Ammonia borane

KW - Atomic layer deposition

KW - Hydrogen evolution

KW - Kinetic and isotopic analyses

KW - Pt-Co synergy

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DO - 10.1016/j.apcatb.2018.04.070

M3 - 文章

AN - SCOPUS:85046765712

SN - 0926-3373

VL - 235

SP - 256

EP - 263

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

Synergistic effects in atomic-layer-deposited PtCox/CNTs catalysts enhancing hydrolytic dehydrogenation of ammonia borane

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