Investigation of High-Activity Activated Carbon-Supported Co-Cr-B Catalyst in the Generation of Hydrogen from Hydrolysis of Sodium Borohydride

Abstract

In this study, activated carbon-supported Co-Cr-B catalyst was synthesized by chemical impregnation and precipitation method for use in the catalytic hydrolysis of sodium borohydride (NaBH 4 ). The activity of Co-Cr-B / activated carbon (5-20%) obtained by using different ratios was investigated while synthesizing activated carbon-supported Co-Cr-B catalyst. The effects of some parameters such as NaOH Concentration (0-5%), NaBH 4 concentration (2.5-10%), amount of catalyst (25-100 mg) and solution ambient temperature were investigated in the catalytic hydrolysis of NaBH 4 . The hydrogen production rate of Co-Cr-B catalyst without support in hydrolysis of NaBH 4 was found as 6.5 Lg -1 min -1 catalyst while the hydrogen production rate of activated carbon supported Co-Cr-B catalyst was found as 30.2 Lg -1 min -1 catalyst . In presence of activated carbon-supported Co-Cr-B catalyst, the hdyrolysis kinetic order and activation energy of NaBH 4 were found as 0.126 and 16.27 kJ/mol, respectively. The results suggest that activated carbon-supported Co-Cr-B catalysts can be used for mobile applications of Proton exchange membrane fuel cell (PEMFCs) systems.

The mechanism and challenges of cobalt-boron-based catalysts in the hydrolysis of sodium borohydride

“…It implied that the electron transport effect among Co, B, and P ions was the major influencing factor for improving the catalytic activities. Baytar 116 studied the effects of the chemical impregnation and precipitation synthesis methods of the Co–Cr–B/activated carbon (AC) catalyst on the catalytic performance. Due to the porous structure of AC itself, the active component of the catalyst has a large surface area.…”

SODYUM BOR HİDRÜRÜN HİDROLİZİNDE KARBON NANOTÜP DESTEKLİ Co-Cr-B KATALİZÖRÜN KULLANILMASI

“…Bu durumun muhtemel nedeni çözelti ortamında fazla miktarda bulunan NaOH'ın NaBH4 hidrolizine yan ürünün olan NaBO2 sudaki çözünürlüğünü azaltmaktadır. Dolayısıyla çözeltideki NaBO2 çökecek ve katalizörün aktif bölgelerini bloke ederek H2 üretim hızını azaltacaktır (Baytar, 2018).…”

Synthesis of activated carbon in the presence of hydrochar from chickpea stalk and its characterization

“…𝑚𝑥𝐵 (1) A: The amount of Na 2 S 2 O 3 .5H 2 O spent in the titration process after iodine adsorption of activated carbon (mL) B: The amount of Na 2 S 2 O 3 .5H 2 O spent in the titration process for 0.1 N iodine solution (mL) N: Iodine solution concentration (N) m: Amount of activated carbon (g)…”

“…Activated carbon, also called activated charcoal, is basically defined as a porous solid material with black carbon with high specific surface area, proper pore size distribution and high surface reactivity [1]. Activated carbon is an amorphous and non-graphitic microcrystalline with a turbostractic structure.…”