Sodium borohydride for the near-future energy: a ''rough diamond'' for Turkey

Demirci, Umit B.

doi:10.3906/kim-1712-6

Cited by 22 publications

(15 citation statements)

References 134 publications

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“…Analysis of these studies is given in the following studies [12,13,14]. Patel et al were analyzed more than 150 studies on containing Co atoms [15].…”

Section: Hydrolysis With Fe Co Ni Cu Base -Mono -Bi -Trimetamentioning

confidence: 99%

Catalytic Hydrogen Production Systems for Portable Power Application

Kuliyev¹,

Fettah²

2019

Chemical Problems

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“…Analysis of these studies is given in the following studies [12,13,14]. Patel et al were analyzed more than 150 studies on containing Co atoms [15].…”

Section: Hydrolysis With Fe Co Ni Cu Base -Mono -Bi -Trimetamentioning

confidence: 99%

Catalytic Hydrogen Production Systems for Portable Power Application

Kuliyev¹,

Fettah²

2019

Chemical Problems

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“…Since the early 2000s, many efforts have been dedicated to the hydrolysis of NaBH 4 ; however, there is no consensus about the chemical structure of the by-product [21,22]. Although the majority of the published studies described sodium metaborate (NaBO 2 ) as the by-product of the reaction, several studies reported that the only by-product that forms is sodium tetrahydroxyborate (NaB(OH) 4 ) [21][22][23][24][25][26][27][28][29][30][31][32][33], since the solution is stabilized with pH beyond 11 [3]. Therefore, the appropriate equation would be written as follows:…”

Section: Introductionmentioning

confidence: 99%

Rehydrogenation of Sodium Borates to Close the NaBH4-H2 Cycle: A Review

et al. 2021

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In 2007, the US Department of Energy recommended a no-go on NaBH4 hydrolysis for onboard applications; however, the concept of a NaBH4-H2-PEMFC system has the potential to become a primary source for on-demand power supply. Despite the many efforts to study this technology, most of the published papers focus on catalytic performance. Nevertheless, the development of a practical reaction system to close the NaBH4-H2 cycle remains a critical issue. Therefore, this work provides an overview of the research progress on the solutions for the by-product rehydrogenation leading to the regeneration of NaBH4 with economic potential. It is the first to compare and analyze the main types of processes to regenerate NaBH4: thermo-, mechano-, and electrochemical. Moreover, it considers the report by Demirci et al. on the main by-product of sodium borohydride hydrolysis. The published literature already reported efficient NaBH4 regeneration; however, the processes still need more improvements. Moreover, it is noteworthy that a transition to clean methods, through the years, was observed.

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“…Cheap compounds of cobalt [15][16][17] or nickel [18][19][20] are usually added to the solid-state NaBH 4 composites. They react with the sodium borohydride to form a catalytically active phase-the amorphous cobalt boride [21].…”

Section: Introductionmentioning

confidence: 99%

Solid-State NaBH4 Composites as Hydrogen Generation Material: Effect of Thermal Treatment of a Catalyst Precursor on the Hydrogen Generation Rate

et al. 2020

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Solid-state composites based on sodium borohydride (NaBH4) were studied for applications as hydrogen generation materials. Hydrates of cobalt and nickel chlorides subjected to a thermal treatment were added to the composites as catalyst precursors. Using thermal analysis and FTIR spectroscopy, it was shown that the amount of water removed increases with the increasing temperature. Herewith, the water molecules that remained in the samples were strongly bound to the metal and isolated from each other. According to the ultraviolet–visible (UV-vis) spectroscopy data, with the increasing temperature of the thermal pretreatment there took place a substitution of a portion of water molecules by chloride ions in the nearest environment of the metal. It appeared that it was the resulting weakening of the electrostatic field on metal that was mainly responsible for the formation of a more finely dispersed catalytic phase of amorphous cobalt boride in the reaction medium under the action of sodium borohydride. The smaller particles of the active components led to a faster rate of gas generation when water was added to the solid-state NaBH4 composites. This trend remained for both the cobalt and the nickel catalytic systems even when the activity was calculated per gram of the metal. Thus, for the preparation of solid-state NaBH4 composites, hydrates of cobalt and nickel chlorides with a low content of water should be used.

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Sodium borohydride for the near-future energy: a ''rough diamond'' for Turkey

Cited by 22 publications

References 134 publications

Catalytic Hydrogen Production Systems for Portable Power Application

Catalytic Hydrogen Production Systems for Portable Power Application

Rehydrogenation of Sodium Borates to Close the NaBH4-H2 Cycle: A Review

Solid-State NaBH4 Composites as Hydrogen Generation Material: Effect of Thermal Treatment of a Catalyst Precursor on the Hydrogen Generation Rate

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