摘要
设计了一套硼氢化钠制氢系统,利用单片微控制器实现系统中的温度、流量、压力等多参数的集成控制,为燃料电池提供流量和压力可调的氢源。制备了NaBH4水解制氢用泡沫镍载铂和泡沫镍载钯催化剂,实验结果表明,由于反应过程中附着在泡沫镍纤维上的钯颗粒严重脱落,使得泡沫镍载钯催化剂在使用寿命及稳定性方面远不如泡沫镍载铂催化剂。而使用泡沫镍载铂催化剂时,产氢速率随着催化剂用量的增加而升高;NaBH4溶液浓度较低时,产氢速率会随溶液浓度升高而增加,但是太高的浓度反而会使产氢速率降低;增加溶液中NaOH浓度会使反应速率快速降低,当NaOH浓度高于2%时,反应基本停止。计算了NaBH4制氢能量体系,并研发了一套集成NaBH4制氢系统及PEMFC系统的示范应用装置。
In this paper,a set of hydrogen generation system using hydrolysis of sodium borohydride（NaBH4） was designed and built.The temperature,pressure and flow rate in the system could be integrally controlled by a single-chip microcontroller to provide adjustable hydrogen for the fuel cell.Pt catalyst and Pd catalyst for hydrolysis of NaBH4 were prepared through replacement plating on nickel foam substrate.It is found that Pt/Ni catalyst has longer service life and higher stability than Pd/Ni catalyst.Hydrogen generation rate was measured when using the Pt/Ni catalyst,and the generation rate became faster as the amount of catalyst Pt/Ni increased;when the NaBH4 solution concentration was low,generation rate increased as the increases of NaBH4 solution concentration,but too high concentration decreased generation rate;the addition of small amount of NaOH into the solution would prevent the decomposition of NaBH4,but when the concentration of NaOH was over 2%,the decomposition of NaBH4 almost stopped.Finally,energy calculation of NaBH4 aqueous solution was carried out.A set of experimental device powered by a prototype of a 10W PEMFC with NaBH4 based H2 generator was built.This NaBH4 generator can be quickly refueled by simply filling the reservoir with fresh NaBH4 solution.Pt/Ni catalyst is reusable.
出处
《电源技术》
CAS
CSCD
北大核心
2010年第9期919-923,共5页
Chinese Journal of Power Sources
基金
国家自然科学基金项目(50675070)
关键词
硼氢化钠
制氢
系统设计
泡沫镍载铂
质子交换膜燃料电池
sodium borohydride
hydrogen generation
system design
foam Ni supported Pt catalyst
proton exchange membrane fuel cell
