Effect of preparation method on Co-B catalytic activity for hydrogen generation from alkali NaBH4 solution

S. U. Jeong; E. A. Cho; S. W. Nam; I. H. Oh; U. H. Jung; S. H. Kim

doi:10.1016/j.ijhydene.2006.11.036

Effect of preparation method on Co-B catalytic activity for hydrogen generation from alkali NaBH₄ solution

S. U. Jeong, E. A. Cho, S. W. Nam, I. H. Oh, U. H. Jung, S. H. Kim

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

117 Citations (Scopus)

Abstract

A Co-B catalyst is used to generate hydrogen from alkaline aqueous NaBH₄ solutions. This study examined the properties of a Co-B catalyst prepared using different precursors (CoCl₂ and CoSO₄) and NaBH₄ / Co^{2 +} mole ratios (0.67, 1.5, 3) at calcination temperatures of 130, 250 and 450 ^{{ring operator}} C. As the calcination temperature was increased in N₂ atmosphere mixed with 1% air, the typical amorphous structure of Co-B disappeared and the X-ray diffraction peaks corresponding to Co₃ O₄ became sharper. Metallic Co was formed when a NaBH₄ / Co^{2 +} mole ratio of 3 was used as the reductant with a corresponding reduction in the rate of H₂ generation. The highest level of H₂ generation (2400 ml/min g) was obtained with CoCl₂ as the precursor, a NaBH₄ / CO^{2 +} mole ratio of 1.5 as the reductant, and a calcination temperature of 250 ^{{ring operator}} C.

Original language	English
Pages (from-to)	1749-1754
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	32
Issue number	12
DOIs	https://doi.org/10.1016/j.ijhydene.2006.11.036
Publication status	Published - 2007 Aug

Keywords

Co-B catalyst
Hydrogen generation
NaBH

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

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

Access to Document

10.1016/j.ijhydene.2006.11.036

Cite this

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title = "Effect of preparation method on Co-B catalytic activity for hydrogen generation from alkali NaBH4 solution",

abstract = "A Co-B catalyst is used to generate hydrogen from alkaline aqueous NaBH4 solutions. This study examined the properties of a Co-B catalyst prepared using different precursors (CoCl2 and CoSO4) and NaBH4 / Co2 + mole ratios (0.67, 1.5, 3) at calcination temperatures of 130, 250 and 450 {ring operator} C. As the calcination temperature was increased in N2 atmosphere mixed with 1% air, the typical amorphous structure of Co-B disappeared and the X-ray diffraction peaks corresponding to Co3 O4 became sharper. Metallic Co was formed when a NaBH4 / Co2 + mole ratio of 3 was used as the reductant with a corresponding reduction in the rate of H2 generation. The highest level of H2 generation (2400 ml/min g) was obtained with CoCl2 as the precursor, a NaBH4 / CO2 + mole ratio of 1.5 as the reductant, and a calcination temperature of 250 {ring operator} C.",

keywords = "Co-B catalyst, Hydrogen generation, NaBH",

author = "Jeong, {S. U.} and Cho, {E. A.} and Nam, {S. W.} and Oh, {I. H.} and Jung, {U. H.} and Kim, {S. H.}",

year = "2007",

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T1 - Effect of preparation method on Co-B catalytic activity for hydrogen generation from alkali NaBH4 solution

AU - Jeong, S. U.

AU - Cho, E. A.

AU - Nam, S. W.

AU - Oh, I. H.

AU - Jung, U. H.

AU - Kim, S. H.

PY - 2007/8

Y1 - 2007/8

N2 - A Co-B catalyst is used to generate hydrogen from alkaline aqueous NaBH4 solutions. This study examined the properties of a Co-B catalyst prepared using different precursors (CoCl2 and CoSO4) and NaBH4 / Co2 + mole ratios (0.67, 1.5, 3) at calcination temperatures of 130, 250 and 450 {ring operator} C. As the calcination temperature was increased in N2 atmosphere mixed with 1% air, the typical amorphous structure of Co-B disappeared and the X-ray diffraction peaks corresponding to Co3 O4 became sharper. Metallic Co was formed when a NaBH4 / Co2 + mole ratio of 3 was used as the reductant with a corresponding reduction in the rate of H2 generation. The highest level of H2 generation (2400 ml/min g) was obtained with CoCl2 as the precursor, a NaBH4 / CO2 + mole ratio of 1.5 as the reductant, and a calcination temperature of 250 {ring operator} C.

AB - A Co-B catalyst is used to generate hydrogen from alkaline aqueous NaBH4 solutions. This study examined the properties of a Co-B catalyst prepared using different precursors (CoCl2 and CoSO4) and NaBH4 / Co2 + mole ratios (0.67, 1.5, 3) at calcination temperatures of 130, 250 and 450 {ring operator} C. As the calcination temperature was increased in N2 atmosphere mixed with 1% air, the typical amorphous structure of Co-B disappeared and the X-ray diffraction peaks corresponding to Co3 O4 became sharper. Metallic Co was formed when a NaBH4 / Co2 + mole ratio of 3 was used as the reductant with a corresponding reduction in the rate of H2 generation. The highest level of H2 generation (2400 ml/min g) was obtained with CoCl2 as the precursor, a NaBH4 / CO2 + mole ratio of 1.5 as the reductant, and a calcination temperature of 250 {ring operator} C.

KW - Co-B catalyst

KW - Hydrogen generation

KW - NaBH

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

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