Development of suitable catalyst binder with reasonable proton conductivity is of great importance for improving catalytic performance of oxygen reduction reactions of platinum-based catalysts. Herein, we report that polybenzimidazole grafted with protic ionic liquid moieties is an effective catalyst binder for oxygen reduction of Pt/C catalysts. The designed Pt/C catalyst layer using protic ionic liquid grafted polybenzimidazole as catalyst binder exhibits an improved catalytic activity for oxygen reduction compared with the sample using commercial Nafion as catalyst binder as evidenced by the positive shift of half-wave potential by about 20 mV with the very similar limiting current density. The specific activity of Pt/C catalyst using the synthesized material as catalyst binder at 0.9 V under acidic conditions is about two times higher than that of catalyst using Nafion as catalyst binder. The peak current density of thus-assembled fuel cell using protic ionic liquid functionalized polybenzimidazole as catalyst binder is about 1.7 times higher than the cell assembled from pristine polybenzimidazole as catalyst binder at 160 °C under anhydrous conditions.

具有合适的质子传导率的合适的催化剂粘合剂的开发对于改善铂基催化剂的氧还原反应的催化性能具有重要意义。在此，我们报道了质子离子液体部分接枝的聚苯并咪唑是一种有效的Pt / C催化剂氧还原催化剂。与使用商品化的Nafion作为催化剂粘合剂的样品相比，使用质子离子液体接枝聚苯并咪唑作为催化剂粘合剂的Pt / C催化剂层表现出改善的氧还原催化活性，这可以通过半波电势在20mV的正向偏移而得到证明。非常相似的极限电流密度。使用合成材料作为催化剂粘合剂的Pt / C催化剂的比活度为0。在酸性条件下的9 V约为使用Nafion作为催化剂粘合剂的催化剂的两倍。在质子离子液体官能化的聚苯并咪唑作为催化剂粘合剂的情况下，如此组装的燃料电池的峰值电流密度比在160℃在无水条件下由原始聚苯并咪唑作为催化剂粘合剂的组装电池的峰值电流密度高约1.7倍。