A carbon supported Pt catalyst with tetradecyltrimethylammonium bromide (TTAB) adsorbed to the nanoparticle surface was operated and tested as a cathode in a polymer electrolyte membrane fuel cell. The fuel cell with the [email protected]/C catalyst showed a higher current relative to the amount of Pt used than the fuel cell with a commercial Pt/C catalyst. Besides, CO stripping evidenced that for the [email protected]/C electrode large parts of the Pt surface were covered by TTAB. Hence, the fuel cell with the [email protected]/C cathode showed a larger current related to the electrochemical active surface area as compared to the fuel cell with the commercial Pt/C cathode. This improvement in the ORR kinetics was further investigated by X-ray photoelectron and in-situ X-ray absorption spectroscopy, and was found to have been caused by two effects: (1) the presence of a metal-ligand charge transfer in the [email protected]/C electrode and (2) the prevention of oxygen containing adsorbates which were being formed in large amounts on the Pt/C electrode. Furthermore, the latter effect also explains the higher stability observed for the [email protected]/C compared to the Pt/C electrode.

操作具有吸附到纳米颗粒表面的十四烷基三甲基溴化铵（TTAB）的碳载Pt催化剂，并作为聚合物电解质膜燃料电池中的阴极进行测试。具有[电子邮件保护] / C催化剂的燃料电池相对于使用的Pt量显示出比具有商业Pt / C催化剂的燃料电池更高的电流。此外，CO汽提表明，对于[受电子邮件保护的] / C电极，Pt表面的大部分被TTAB覆盖。因此，与具有商业Pt / C阴极的燃料电池相比，具有[电子邮件保护] / C阴极的燃料电池显示出与电化学活性表面积相关的更大电流。X射线光电子和原位X射线吸收光谱进一步研究了ORR动力学的这种改善，发现这是由两个作用引起的：（1）[电子邮件保护] / C电极中存在金属配体电荷转移，（2）防止了在Pt / C电极上大量形成的含氧吸附物。此外，后一种效应还解释了与Pt / C电极相比，[电子邮件保护] / C具有更高的稳定性。