Deng Xiaoting, Lao Min, Li Zhenqin, Yin Shaofeng, Liu Feng, Xie Zhiyong, Liang Yili
College of Food and Chemical Engineering, Shaoyang University, Shaoyang 422000, China.
National Key Laboratory of Science and Technology for National Defence on High-strength Structural Materials, Central South University, Changsha 410083, China.
ACS Omega. 2022 Aug 24;7(35):31502-31508. doi: 10.1021/acsomega.2c04187. eCollection 2022 Sep 6.
A flexible carbon nanofiber film with high conductivity was prepared by electrospinning, and then Cu was uniformly deposited on the fiber film by pulse electrodeposition to prepare Cu nanocrystal/carbon nanofiber film. Cu@PtCu/carbon nanofiber (Cu@PtCu/CNF) catalytic films were synthesized by in-situ substitution reduction. The Cu@PtCu/CNF catalytic film solves the problem of uneven activity of the catalytic layer and can be directly used as the catalytic layer. The morphology and structure were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Electrochemical test results show that the Cu@PtCu/CNF catalytic films obtained at the chloroplatinic acid concentration of 0.5 mg·mL (N2) exhibited 2.5 times specific activity when compared with commercial Pt/C catalysts. After 5000 cycles of stability test, the electrochemical surface areas (ECSAs) were still maintained at 80%, and the half-wave potential decreased by 11 mV, which was better than those of commercial Pt/C catalysts.
通过静电纺丝制备了具有高导电性的柔性碳纳米纤维膜，然后通过脉冲电沉积将铜均匀沉积在纤维膜上，制备出铜纳米晶体/碳纳米纤维膜。通过原位置换还原合成了Cu@PtCu/碳纳米纤维（Cu@PtCu/CNF）催化膜。Cu@PtCu/CNF催化膜解决了催化层活性不均匀的问题，可直接用作催化层。通过透射电子显微镜（TEM）、扫描电子显微镜（SEM）、X射线衍射（XRD）和X射线光电子能谱（XPS）对其形貌和结构进行了表征。电化学测试结果表明，在氯铂酸浓度为0.5 mg·mL（N2）时获得的Cu@PtCu/CNF催化膜与商业Pt/C催化剂相比，比活性提高了2.5倍。经过5000次循环稳定性测试后，电化学表面积（ECSAs）仍保持在80%，半波电位下降了11 mV，优于商业Pt/C催化剂。
