Ni/C nanostructures: Impregnating-method preparation, textural and structural features, and catalytic property for the hydrogen production

Félix Galindo-Hernández, Jin An Wang, Lifang Chen, Xim Bokhimi, Alejandro Pérez-Larios, Ricardo Gómez

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A series of Ni/C catalysts with different Ni content (15, 20, and 30 wt% Ni) were prepared by the wet incipient impregnation method. Their textural properties were studied by surface fractal dimension (D s) and nonlocal density functional theory using nitrogen sorption data. Their structural properties were studied by x-ray diffraction, Rietveld refinement, radial distribution functions (RDFs), and electron density maps of Fourier. Surface areas of Ni/C catalysts decreases slightly from 614 to 533 m2/g as Ni content increases from 15 to 30 wt%; however, the Ni crystallite size (5.1-31.4 nm) increases as the nickel content increases. Many point defects were found by Rietveld refinement in nickel nanostructures of Ni/C catalysts with 20 and 30 wt% Ni. This was confirmed by RDFs and electronic density maps. On the other hand, the hydrogen production via the photodehydrogenation of ethanol is very sensitive to the nickel crystallite size and the number Ni atoms in nickel nanostructures. The maximum reaction rate (363.64 μmol/h) is achieved on Ni/C catalyst with 15 Wt% Ni content which has the smallest crystallite size (5.1 nm) and less point defects in its nickel nanostructures. Ab initio calculations were performed to propose a reaction mechanism in the photodehydrogenation of ethanol.

Original languageEnglish
Pages (from-to)3297-3309
Number of pages13
JournalJournal of Materials Research
Volume28
Issue number23
DOIs
StatePublished - 14 Dec 2013

Fingerprint

impregnating
hydrogen production
Hydrogen production
Nickel
Nanostructures
nickel
Crystallite size
preparation
catalysts
Catalysts
Rietveld refinement
Point defects
radial distribution
point defects
Distribution functions
Ethanol
ethyl alcohol
distribution functions
Fractal dimension
Impregnation

Keywords

  • DFT
  • Electron density maps
  • Ethanol photodehydrogenation
  • Hydrogen production
  • Ni/C catalysts
  • Nickel nanostructures
  • Nickel point defects
  • Rietveld refinement

Cite this

Galindo-Hernández, Félix ; Wang, Jin An ; Chen, Lifang ; Bokhimi, Xim ; Pérez-Larios, Alejandro ; Gómez, Ricardo. / Ni/C nanostructures : Impregnating-method preparation, textural and structural features, and catalytic property for the hydrogen production. In: Journal of Materials Research. 2013 ; Vol. 28, No. 23. pp. 3297-3309.
@article{b983681545964159987c444264b941f8,
title = "Ni/C nanostructures: Impregnating-method preparation, textural and structural features, and catalytic property for the hydrogen production",
abstract = "A series of Ni/C catalysts with different Ni content (15, 20, and 30 wt{\%} Ni) were prepared by the wet incipient impregnation method. Their textural properties were studied by surface fractal dimension (D s) and nonlocal density functional theory using nitrogen sorption data. Their structural properties were studied by x-ray diffraction, Rietveld refinement, radial distribution functions (RDFs), and electron density maps of Fourier. Surface areas of Ni/C catalysts decreases slightly from 614 to 533 m2/g as Ni content increases from 15 to 30 wt{\%}; however, the Ni crystallite size (5.1-31.4 nm) increases as the nickel content increases. Many point defects were found by Rietveld refinement in nickel nanostructures of Ni/C catalysts with 20 and 30 wt{\%} Ni. This was confirmed by RDFs and electronic density maps. On the other hand, the hydrogen production via the photodehydrogenation of ethanol is very sensitive to the nickel crystallite size and the number Ni atoms in nickel nanostructures. The maximum reaction rate (363.64 μmol/h) is achieved on Ni/C catalyst with 15 Wt{\%} Ni content which has the smallest crystallite size (5.1 nm) and less point defects in its nickel nanostructures. Ab initio calculations were performed to propose a reaction mechanism in the photodehydrogenation of ethanol.",
keywords = "DFT, Electron density maps, Ethanol photodehydrogenation, Hydrogen production, Ni/C catalysts, Nickel nanostructures, Nickel point defects, Rietveld refinement",
author = "F{\'e}lix Galindo-Hern{\'a}ndez and Wang, {Jin An} and Lifang Chen and Xim Bokhimi and Alejandro P{\'e}rez-Larios and Ricardo G{\'o}mez",
year = "2013",
month = "12",
day = "14",
doi = "10.1557/jmr.2013.337",
language = "Ingl{\'e}s",
volume = "28",
pages = "3297--3309",
journal = "Journal of Materials Research",
issn = "0884-2914",
publisher = "Cambridge University Press",
number = "23",

}

Ni/C nanostructures : Impregnating-method preparation, textural and structural features, and catalytic property for the hydrogen production. / Galindo-Hernández, Félix; Wang, Jin An; Chen, Lifang; Bokhimi, Xim; Pérez-Larios, Alejandro; Gómez, Ricardo.

In: Journal of Materials Research, Vol. 28, No. 23, 14.12.2013, p. 3297-3309.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ni/C nanostructures

T2 - Impregnating-method preparation, textural and structural features, and catalytic property for the hydrogen production

AU - Galindo-Hernández, Félix

AU - Wang, Jin An

AU - Chen, Lifang

AU - Bokhimi, Xim

AU - Pérez-Larios, Alejandro

AU - Gómez, Ricardo

PY - 2013/12/14

Y1 - 2013/12/14

N2 - A series of Ni/C catalysts with different Ni content (15, 20, and 30 wt% Ni) were prepared by the wet incipient impregnation method. Their textural properties were studied by surface fractal dimension (D s) and nonlocal density functional theory using nitrogen sorption data. Their structural properties were studied by x-ray diffraction, Rietveld refinement, radial distribution functions (RDFs), and electron density maps of Fourier. Surface areas of Ni/C catalysts decreases slightly from 614 to 533 m2/g as Ni content increases from 15 to 30 wt%; however, the Ni crystallite size (5.1-31.4 nm) increases as the nickel content increases. Many point defects were found by Rietveld refinement in nickel nanostructures of Ni/C catalysts with 20 and 30 wt% Ni. This was confirmed by RDFs and electronic density maps. On the other hand, the hydrogen production via the photodehydrogenation of ethanol is very sensitive to the nickel crystallite size and the number Ni atoms in nickel nanostructures. The maximum reaction rate (363.64 μmol/h) is achieved on Ni/C catalyst with 15 Wt% Ni content which has the smallest crystallite size (5.1 nm) and less point defects in its nickel nanostructures. Ab initio calculations were performed to propose a reaction mechanism in the photodehydrogenation of ethanol.

AB - A series of Ni/C catalysts with different Ni content (15, 20, and 30 wt% Ni) were prepared by the wet incipient impregnation method. Their textural properties were studied by surface fractal dimension (D s) and nonlocal density functional theory using nitrogen sorption data. Their structural properties were studied by x-ray diffraction, Rietveld refinement, radial distribution functions (RDFs), and electron density maps of Fourier. Surface areas of Ni/C catalysts decreases slightly from 614 to 533 m2/g as Ni content increases from 15 to 30 wt%; however, the Ni crystallite size (5.1-31.4 nm) increases as the nickel content increases. Many point defects were found by Rietveld refinement in nickel nanostructures of Ni/C catalysts with 20 and 30 wt% Ni. This was confirmed by RDFs and electronic density maps. On the other hand, the hydrogen production via the photodehydrogenation of ethanol is very sensitive to the nickel crystallite size and the number Ni atoms in nickel nanostructures. The maximum reaction rate (363.64 μmol/h) is achieved on Ni/C catalyst with 15 Wt% Ni content which has the smallest crystallite size (5.1 nm) and less point defects in its nickel nanostructures. Ab initio calculations were performed to propose a reaction mechanism in the photodehydrogenation of ethanol.

KW - DFT

KW - Electron density maps

KW - Ethanol photodehydrogenation

KW - Hydrogen production

KW - Ni/C catalysts

KW - Nickel nanostructures

KW - Nickel point defects

KW - Rietveld refinement

UR - http://www.scopus.com/inward/record.url?scp=84890065357&partnerID=8YFLogxK

U2 - 10.1557/jmr.2013.337

DO - 10.1557/jmr.2013.337

M3 - Artículo

AN - SCOPUS:84890065357

VL - 28

SP - 3297

EP - 3309

JO - Journal of Materials Research

JF - Journal of Materials Research

SN - 0884-2914

IS - 23

ER -