采用静电纺丝技术制备了一种纤维状钴铜双金属氧化物催化剂,并考察了催化剂中不同金属比例、不同催化剂制备方法、催化剂加入量、氨硼烷加入量以及水解温度对氨硼烷水解释氢的影响。结果表明:由于钴和铜之间存在强的协同效应,从而提高了催化剂的催化性能。当钴和铜的摩尔比为8∶1时,所制备的催化剂Co8Cu1Ox-NF性能最优,催化氨硼烷水解的活化能为38.41kJ/mol,反应转化频率(TOF)为2443.52mL/(min·gmetal),经过5次循环使用仍能保持较高的催化活性,该催化剂对氨硼烷水解具有良好的催化活性和循环稳定性。
A fibrous cobalt-copper bimetal oxide catalyst was fabricated by electrospinning technique.The effects of different metal molar ratios in the catalyst,catalyst preparation methods,catalyst dosages,ammonia borane amounts,and reaction temperatures on the hydrolytic dehydrogenation of ammonia borane were investigated.The results showed that the catalytic performance of the catalyst was improved due to the strong synergistic effect between cobalt and copper.When the molar ratio of cobalt to copper was 8∶1,the catalyst Co8Cu1Ox-NF had the best performance.For the hydrolysis of ammonia borane over the Co8Cu1Ox-NF catalyst,the turnover frequency (TOF) reached 2443.52mL/(min·gmetal) and the activation energy (Ea) was 38.41kJ/mol.The catalyst still remained high catalytic activity after 5 cycles and exhibited superior catalytic activity and recycling stability in the hydrolysis of ammonia borane.
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基金资助
国家自然科学基金青年基金(21908043)
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