目的 优化 Cu-Co-P 非晶合金的化学镀工艺,研究其对硼氢化钠水解制氢的催化性能。 方法以铁片为基体,研究化学镀 Cu-Co-P 非晶合金的制备工艺,探讨镀液成分对沉积速率、镀液稳定性及镀层质量的影响,并根据研究结果筛选出化学镀 Cu-Co-P 的优化配方。 采用该配方对氧化铝(γ-Al2O3 )基体施镀,制备出负载型 Cu-Co-P/ γ-Al2O3 非晶合金催化剂,对其组成、形貌和结构等进行表征。 利用硼氢化钠水解制氢实验,评价制备的负载型 Cu-Co-P 多元合金催化剂的催化性能。 结果 根据优化配方制备出的负载型非晶合金 Cu-Co-P/ γ-Al2O3 催化剂的比表面积为 233 m2 / g,相对组成为 57. 85% Cu+39. 69% Co钴+2. 46% P(均为质量分数)。 45 ℃条件下,在 20 mL 含 1 g 硼氢化钠和 1 g 氢氧化钠的溶液中,硼氢化钠水解制氢的速率为 1295 mL/ (g·min)。 结论 化学镀 Cu-Co-P 的优化配方组成为:硫酸钴 20 g/ L,硫酸铜 0. 7 g/ L,次亚磷酸钠 40 g/ L,柠檬酸钠 20 g/ L,EDTA-2Na 10 g/ L,氟化铵 25 g/ L。 工艺参数为:温度(85±1) ℃ ,pH=9。

Objective To optimize the preparation process of Cu-Co-P amorphous alloy and to study its catalytic performance for hydrogen generation in the hydrolysis of sodium borohydride. Methods The amorphous alloy Cu-Co-P was prepared on iron sheets by electroless deposition method. The effects of bath composition on deposition rate, bath stability and coating quality were investigated. The optimized formulation was screened out based on the research results. The supported amorphous alloy catalysts Cu-Co-P/ γ-Al2O3 were synthesized according to the optimized formulation. The composition, surface morphology and phase structure of the deposited Cu-Co-P / γ-Al2 O3 catalyst were characterized. The catalytic properties of the prepared multiple amorphous alloy catalysts Cu-Co-P were investigated using the hydrolysis reaction of sodium borohydride solution. Results The BET surface area of the obtained supported Cu-Co-P / γ-Al2 O3 amorphous alloy catalyst was 233 m2 / g, and it contained 57. 85wt% Cu, 39. 69wt% Co and 2. 46wt% P. A hydrogen generation rate of 1295 mL / (g·min) was achieved at 45 ℃ by hydrolysis of NaBH4 solution containing 1 g NaBH4 and 1 g NaOH. Conclusion The optimized electroless plating formulation of Cu-Co-P was 20 g / L cobalt sulfate heptahydrate, 0. 7 g / L copper sulfate pentahydrate, 40 g / L sodium hypophosphite monohydrate, 20 g / L trisodium citrate dehydrate, 10 g / L ethylenediamine tetraacetic acid disodium salt and 25 g / L ammonium fluoride. The process was controlled at (85±1) ℃ and pH = 9.