Catalytic hydrolysis of sodium borohydride by a novel nickel–cobalt–boride catalyst

Ingersoll, J.C.; Mani, Neelakandha S.; Thenmozhiyal, J. C.; Muthaiah, A.

doi:10.1016/j.jpowsour.2007.04.040

Cited by 271 publications

(108 citation statements)

References 29 publications

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“…However, the hydrogen generation rates of the crystal state Ni and Raney Ni in previous study were only 19.5 and 228.5 ml min −1 g −1 catalyst respectively [3], while the hydrogen generation rates of the Ni-Co-B catalysts here are much higher, as described subsequently. Therefore, it indicates that these catalysts were obviously different from each other, indicating the existence of other crystal phases, such as Co, Co-B or Co-Ni-B [22], during the heat treatment of the Ni-Co-B catalyst. The formation of the cubic crystal systems of Co [26], Co-B [27,28] and Ni-B [29] as well as other crystal phases might also be found in the fine XRD patterns.…”

Section: Hydrogen Generating Testmentioning

confidence: 99%

“…To meet the requirements of practical applications, some other metal borides, such as nickel boride [20,21] and ferric boride [8], were also evaluated. In 2007, Ingersoll et al [22] found that the catalyst Ni-Co-B that could positively contribute to an enhanced efficiency of hydrogen generation. More recently, Fernandes et al [23] indicated that the presence of mixed Co-Ni with B atoms results in an enhanced catalytic effect with respect to Co-B or Ni-B powders.…”

Section: Introductionmentioning

confidence: 99%

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Ni–Co–B catalyst-promoted hydrogen generation by hydrolyzing NaBH4 solution for in situ hydrogen supply of portable fuel cells

Bai

Danxian

et al. 2011

Catalysis Today

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Section: Hydrogen Generating Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ni–Co–B catalyst-promoted hydrogen generation by hydrolyzing NaBH4 solution for in situ hydrogen supply of portable fuel cells

Bai

Danxian

et al. 2011

Catalysis Today

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“…versus the natural log of the NaBH 4 concentration obtained at each temperature was slightly greater than zero, but considering the errors inherent in measuring system, we assumed that the kinetics of the hydrolysis is a zero order reaction, in agreement with published literature work [25,26]. Thus, the reaction rate equation, with a modified rate constant, k′, and a modified Arrhenius exponential factor, k o ′, is: where:…”

Section: Kinetic Parametersmentioning

confidence: 88%

Electroless Nickel-Based Catalyst for Diffusion Limited Hydrogen Generation through Hydrolysis of Borohydride

Anderson

Kalu

2013

Crystals

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Catalysts based on electroless nickel and bi-metallic nickel-molybdenum nanoparticles were synthesized for the hydrolysis of sodium borohydride for hydrogen generation. The catalysts were synthesized by polymer-stabilized Pd nanoparticle-catalyzation and activation of Al 2 O 3 substrate and electroless Ni or Ni-Mo plating of the substrate for selected time lengths. Catalytic activity of the synthesized catalysts was tested for the hydrolyzation of alkaline-stabilized NaBH 4 solution for hydrogen generation. The effects of electroless plating time lengths, temperature and NaBH 4 concentration on hydrogen generation rates were analyzed and discussed. Compositional analysis and surface morphology were carried out for nano-metallized Al 2 O 3 using Scanning Electron Micrographs (SEM) and Energy Dispersive X-Ray Microanalysis (EDAX). The as-plated polymer-stabilized electroless nickel catalyst plated for 10 min and unstirred in the hydrolysis reaction exhibited appreciable catalytic activity for hydrolysis of NaBH 4 . For a zero-order reaction assumption, activation energy of hydrogen generation using the catalyst was estimated at 104.6 kJ/mol. Suggestions are provided for further work needed prior to using the catalyst for portable hydrogen generation from aqueous alkaline-stabilized NaBH 4 solution for fuel cells.

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“…The rate of hydrogen generation was surveyed using (Ni − Co − B) catalyst. The rate of hydrogen generation was increased with lower NaOH concentrations in the alkaline NaBH 4 solution and decreased after reaching a maximum value at 15 wt.% of NaOH [14]. Cobalt 8 By 2008, cobalt nanoparticles using thermal decomposition of [bis(salicylidene)cobalt (II)] in the presence of TPP and oleylamine was studied.…”

Section: Synthesized New Cobalt Compoundsmentioning

confidence: 99%

“…Nickel-cobalt-boride (Ni − Co − B) catalysts are used to design an efficient hydrogen generator for portable fuel cell applications [14].…”

Section: Introductionmentioning

confidence: 99%

General Aspects of the Cobalt Chemistry

Yıldız¹

2017

Cobalt

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This chapter aims to collect and summarize the chemical properties of cobalt and some new cobalt compounds. It deals with the progress of cobalt chemistry. Cobalt has been substantial in both chemical reactions and within many compounds. Some of them are heterocyclic reactions, cobalt-based catalyst and cobalamin. Also, it discusses variety of applications of cobalt in a wide range of areas and toxicity of cobalt. The studies carried out in this area so far have enabled and will be continued to be responsible for producing unknown and difficult reactions. This survey of the recent literature illustrates the fact that many different approaches on cobalt and new cobalt compounds are being used in many different areas.

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Catalytic hydrolysis of sodium borohydride by a novel nickel–cobalt–boride catalyst

Cited by 271 publications

References 29 publications

Ni–Co–B catalyst-promoted hydrogen generation by hydrolyzing NaBH4 solution for in situ hydrogen supply of portable fuel cells

Ni–Co–B catalyst-promoted hydrogen generation by hydrolyzing NaBH4 solution for in situ hydrogen supply of portable fuel cells

Electroless Nickel-Based Catalyst for Diffusion Limited Hydrogen Generation through Hydrolysis of Borohydride

General Aspects of the Cobalt Chemistry

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