Baytar Orhan
Acta Chim Slov. 2018 Jun;65(2):407-415. doi: 10.17344/acsi.2017.4151.
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 (NaBH4). 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%), NaBH4 concentration (2.5-10%), amount of catalyst (25-100 mg) and solution ambient temperature were investigated in the catalytic hydrolysis of NaBH4. The hydrogen production rate of Co-Cr-B catalyst without support in hydrolysis of NaBH4 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 NaBH4 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.
在本研究中，采用化学浸渍和沉淀法合成了用于硼氢化钠（NaBH₄）催化水解的活性炭负载Co-Cr-B催化剂。在合成活性炭负载Co-Cr-B催化剂时，研究了使用不同比例获得的Co-Cr-B/活性炭（5-20%）的活性。在NaBH₄的催化水解中，研究了一些参数的影响，如NaOH浓度（0-5%）、NaBH₄浓度（2.5-10%）、催化剂用量（25-100mg）和溶液环境温度。发现无载体的Co-Cr-B催化剂在NaBH₄水解中的产氢速率为6.5Lg⁻¹min⁻¹催化剂，而活性炭负载的Co-Cr-B催化剂的产氢速率为30.2Lg⁻¹min⁻¹催化剂。在活性炭负载的Co-Cr-B催化剂存在下，NaBH₄的水解动力学级数和活化能分别为0.126和16.27kJ/mol。结果表明，活性炭负载的Co-Cr-B催化剂可用于质子交换膜燃料电池（PEMFCs）系统的移动应用。
