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OALib Journal期刊
ISSN: 2333-9721
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mn-n-c催化剂的制备及其在碱性介质中对氧还原反应的电催化性能
, PP. 467-475
Keywords: 壳聚糖,非贵金属催化剂,电催化,mn-n-c,氧还原,热处理
Abstract:
？选用壳聚糖（cs）为原料制备了壳聚糖水杨醛席夫碱锰配合物（mn-cs-sal）。将mn-cs-sal配合物负载于石墨碳上得到碳载配合物（mn-cs-sal/c），后经高温热处理得到mn-n-c目标催化剂（mn-n-c-t，t=200、400、600、800、1000℃）。采用ft-ir、xrd、xps和电化学等方法对催化剂的组成和结构进行了表征，对其在氧还原反应中的电催化性能进行了研究。结果表明，所得到的mn-n-c催化剂对氧还原反应（orr）具有很好的催化作用，但以600℃热处理制备的催化剂其活性最好。催化剂中mn-n-c结构是催化orr的活性位。采用循环伏安法获得了mn-n-c-t催化orr的动力学参数，即总的转移电子数n和电子传递系数αnα；具有最佳活性的mn-n-c-600催化剂的总转移电子数为3.63，说明在此条件下，mn-n-c-600催化orr主要以4e转移途径为主，由此提出了可能的氧还原反应的机理。
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