Abstract

A novel nitrogen-riched composite (PPYTZ/C) was firstly prepared by chemical polymerization, and then the Cu-PPYTZ/C complex was obtained by immersing the PPYTZ/C modified electrode in copper sulphate solution. For comparing the performance of the two catalysts, physical and electrochemical measurements were adopted. Wherein, physical measurements include scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). And, the electrochemical measurements include cyclic voltammetry (CV), rotating disk electrode (RDE) and rotating ring-disk electrode (RRDE), and then the above measurement results were compared with commercial Pt/C. The CV and RDE results proved that Cu-PPYTZ/C catalyst exhibits excellent performance than that of PPYTZ/C in term of ORR activities and stability. In addition, the RRDE results also indicated that Cu-PPYTZ/C is comparable to the commercialization Pt/C in term of electron transfer numbers. In conclusion, Cu-PPYTZ/C is the potential candidate for oxygen reduction reaction catalysts, which is attribute to the role of CN_x-M in Cu-PPYTZ/C catalyst as the catalytic group.

Graphic Abstract

中文翻译：

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含氮聚合物基材料的制备，表征以及Cu–N活性位点在促进催化剂ORR活性中的作用

摘要

首先通过化学聚合制备了一种新型的富氮复合材料（PPYTZ / C），然后将PPYTZ / C修饰的电极浸入硫酸铜溶液中，得到了Cu-PPYTZ / C配合物。为了比较两种催化剂的性能，采用了物理和电化学测量。其中，物理测量包括扫描电子显微镜（SEM）和X射线光电子能谱（XPS）。并且，电化学测量包括循环伏安法（CV），旋转盘电极（RDE）和旋转环盘电极（RRDE），然后将上述测量结果与商业Pt / C进行比较。CV和RDE结果证明，就ORR活性和稳定性而言，Cu-PPYTZ / C催化剂表现出比PPYTZ / C优异的性能。此外，RRDE结果还表明，就电子转移数而言，Cu-PPYTZ / C与商品化的Pt / C相当。总之，Cu-PPYTZ / C是氧还原反应催化剂的潜在候选者，这归因于CN的作用在Cu-PPYTZ / C催化剂中的_x -M作为催化基团。

图形摘要