Tsai Ming-Jer, Hsieh Tar-Hwa, Wang Yen-Zen, Ho Ko-Shan, Chang Chia-Yun
Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan.
Department of Chemical and Materials Engineering, National Yun-Lin University of Science and Technology, Yun-Lin 64002, Taiwan.
Polymers (Basel). 2017 Mar 15;9(3):104. doi: 10.3390/polym9030104.
The presence of -phenyl--phenylenediamine (PPDA: a dimer of aniline) during microwave (MW) irradiation can significantly improve Pt-loading on the XC72 carbon matrix as a catalyst support of proton exchange membrane fuel cells (PEMFCs). PPDA is converted to an emeraldine base state during MW-assisted redox reaction, which is characterized by both FTIR and Raman spectra. The increased degree of conjugation from the formation of quinone-state of PPDA is confirmed by UV-VIS spectra. TEM micrographs and residue weights obtained from the TGA thermograms illustrate the particle size and Pt-loading percent of Pt nanoparticles (NPs) after MW irradiation, respectively. X-ray diffraction patterns indicate Pt NPs are successfully loaded on XC72 by MW irradiation corresponding to hydrothermal method. The single cell performance demonstrates an increasing power and maximum current density when Pt-catalyst of membrane exchanged assembly (MEA) is prepared by MW-assisted reduction in the presence of PPDA.
在微波（MW）辐照过程中加入对苯基对苯二胺（PPDA：苯胺二聚体），作为质子交换膜燃料电池（PEMFC）的催化剂载体，可显著提高XC72碳载体上的铂负载量。在微波辅助氧化还原反应过程中，PPDA转变为翡翠碱状态，这通过傅里叶变换红外光谱（FTIR）和拉曼光谱得到表征。紫外可见光谱（UV-VIS）证实了由于PPDA醌态的形成，共轭程度增加。透射电子显微镜（TEM）图像和热重分析（TGA）热重曲线得到的残留重量分别说明了微波辐照后铂纳米颗粒（NPs）的粒径和铂负载百分比。X射线衍射图谱表明，与水热法相对应，通过微波辐照成功地将铂纳米颗粒负载到XC72上。单电池性能表明，当在PPDA存在下通过微波辅助还原制备膜交换组件（MEA）的铂催化剂时，功率和最大电流密度会增加。
