Ru-N-C hybrid nanocomposite for ammonia dehydrogenation: Influence of N-doping on catalytic activity

Nguyen Thi Bich Hien; Hyo Young Kim; Mina Jeon; Jin Hee Lee; Muhammad Ridwan; Rizcky Tamarany; Chang Won Yoon

doi:10.3390/ma8063442

Ru-N-C hybrid nanocomposite for ammonia dehydrogenation: Influence of N-doping on catalytic activity

Nguyen Thi Bich Hien, Hyo Young Kim, Mina Jeon, Jin Hee Lee, Muhammad Ridwan, Rizcky Tamarany, Chang Won Yoon

Department of Chemistry

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

23 Citations (Scopus)

Abstract

For application to ammonia dehydrogenation, novel Ru-based heterogeneous catalysts, Ru-N-C and Ru-C, were synthesized via simple pyrolysis of a mixture of RuCl₃·6H₂O and carbon black with or without dicyandiamide as a nitrogen-containing precursor at 550 °C. Characterization of the prepared Ru-N-C and Ru-C catalysts via scanning transmission electron microscopy, in conjunction with energy dispersive X-ray spectroscopy, indicated the formation of hollow nanocomposites in which the average sizes of the Ru nanoparticles were 1.3nm and 5.1nm, respectively. Compared to Ru-C, the Ru-N-C nanocomposites not only proved to be highly active for ammonia dehydrogenation, giving rise to a NH₃ conversion of >99% at 550 °C, but also exhibited high durability. X-ray photoelectron spectroscopy revealed that the Ru active sites in Ru-N-C were electronically perturbed by the incorporated nitrogen atoms, which increased the Ru electron density and ultimately enhanced the catalyst activity.

Original language	English
Pages (from-to)	3442-3455
Number of pages	14
Journal	Materials
Volume	8
Issue number	6
DOIs	https://doi.org/10.3390/ma8063442
Publication status	Published - 2015

Keywords

Ammonia
Dehydrogenation
Fuel cell
Hollow graphitic structure
N-doping
Ru-N-C

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title = "Ru-N-C hybrid nanocomposite for ammonia dehydrogenation: Influence of N-doping on catalytic activity",

abstract = "For application to ammonia dehydrogenation, novel Ru-based heterogeneous catalysts, Ru-N-C and Ru-C, were synthesized via simple pyrolysis of a mixture of RuCl3·6H2O and carbon black with or without dicyandiamide as a nitrogen-containing precursor at 550 °C. Characterization of the prepared Ru-N-C and Ru-C catalysts via scanning transmission electron microscopy, in conjunction with energy dispersive X-ray spectroscopy, indicated the formation of hollow nanocomposites in which the average sizes of the Ru nanoparticles were 1.3nm and 5.1nm, respectively. Compared to Ru-C, the Ru-N-C nanocomposites not only proved to be highly active for ammonia dehydrogenation, giving rise to a NH3 conversion of >99% at 550 °C, but also exhibited high durability. X-ray photoelectron spectroscopy revealed that the Ru active sites in Ru-N-C were electronically perturbed by the incorporated nitrogen atoms, which increased the Ru electron density and ultimately enhanced the catalyst activity.",

keywords = "Ammonia, Dehydrogenation, Fuel cell, Hollow graphitic structure, N-doping, Ru-N-C",

author = "Hien, {Nguyen Thi Bich} and Kim, {Hyo Young} and Mina Jeon and Lee, {Jin Hee} and Muhammad Ridwan and Rizcky Tamarany and Yoon, {Chang Won}",

note = "Publisher Copyright: {\textcopyright} 2015 by the authors.",

year = "2015",

doi = "10.3390/ma8063442",

language = "English",

volume = "8",

pages = "3442--3455",

journal = "Materials",

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T1 - Ru-N-C hybrid nanocomposite for ammonia dehydrogenation

T2 - Influence of N-doping on catalytic activity

AU - Hien, Nguyen Thi Bich

AU - Kim, Hyo Young

AU - Jeon, Mina

AU - Lee, Jin Hee

AU - Ridwan, Muhammad

AU - Tamarany, Rizcky

AU - Yoon, Chang Won

PY - 2015

Y1 - 2015

N2 - For application to ammonia dehydrogenation, novel Ru-based heterogeneous catalysts, Ru-N-C and Ru-C, were synthesized via simple pyrolysis of a mixture of RuCl3·6H2O and carbon black with or without dicyandiamide as a nitrogen-containing precursor at 550 °C. Characterization of the prepared Ru-N-C and Ru-C catalysts via scanning transmission electron microscopy, in conjunction with energy dispersive X-ray spectroscopy, indicated the formation of hollow nanocomposites in which the average sizes of the Ru nanoparticles were 1.3nm and 5.1nm, respectively. Compared to Ru-C, the Ru-N-C nanocomposites not only proved to be highly active for ammonia dehydrogenation, giving rise to a NH3 conversion of >99% at 550 °C, but also exhibited high durability. X-ray photoelectron spectroscopy revealed that the Ru active sites in Ru-N-C were electronically perturbed by the incorporated nitrogen atoms, which increased the Ru electron density and ultimately enhanced the catalyst activity.

AB - For application to ammonia dehydrogenation, novel Ru-based heterogeneous catalysts, Ru-N-C and Ru-C, were synthesized via simple pyrolysis of a mixture of RuCl3·6H2O and carbon black with or without dicyandiamide as a nitrogen-containing precursor at 550 °C. Characterization of the prepared Ru-N-C and Ru-C catalysts via scanning transmission electron microscopy, in conjunction with energy dispersive X-ray spectroscopy, indicated the formation of hollow nanocomposites in which the average sizes of the Ru nanoparticles were 1.3nm and 5.1nm, respectively. Compared to Ru-C, the Ru-N-C nanocomposites not only proved to be highly active for ammonia dehydrogenation, giving rise to a NH3 conversion of >99% at 550 °C, but also exhibited high durability. X-ray photoelectron spectroscopy revealed that the Ru active sites in Ru-N-C were electronically perturbed by the incorporated nitrogen atoms, which increased the Ru electron density and ultimately enhanced the catalyst activity.

KW - Ammonia

KW - Dehydrogenation

KW - Fuel cell

KW - Hollow graphitic structure

KW - N-doping

KW - Ru-N-C

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DO - 10.3390/ma8063442

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SN - 1996-1944

VL - 8

SP - 3442

EP - 3455

JO - Materials

JF - Materials

IS - 6

ER -

Ru-N-C hybrid nanocomposite for ammonia dehydrogenation: Influence of N-doping on catalytic activity

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Keywords

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