The kinetic influences of transition metals (TMs) in non-platinum group metal (non-PGM) catalysts using ethylenediamine-TM (en-TM) complex are studied for the electro-reduction of oxygen. We exhibit that Ni atoms are inefficiently dispersed, which may influence the N doping as evidenced by XPS and elemental maps. High concentrations of N are attributed to the well-dispersed Co and Fe over the carbon. Electrochemical measurements demonstrate that the ORR on Co@NC and Fe@NC catalysts takes place faster than that on NC and Ni@NC catalysts. The correlation between the quaternary-N concentration of species and the onset potential with respect to TMs is investigated.

研究了使用乙二胺-TM（en-TM）配合物的非铂族金属（non-PGM）催化剂中过渡金属（TMs）的动力学影响，以进行氧气的电还原。我们展示出Ni原子的分散效率低下，这可能会影响XPS和元素图证明的N掺杂。高浓度的N归因于Co和Fe在碳上的充分分散。电化学测量表明，在Co @ NC和Fe @ NC催化剂上的ORR发生的速度比NC和Ni @ NC催化剂上的ORR更快。研究了物种的季氮浓度与相对于TMs的起始电位之间的相关性。