エネルギー変換のための新規カーボン電極触媒の開発

我们成功地应用了聚苯胺（PAni）的氧化还原单元，在有序有序的碳电极上原位协同组装了高活性的Ru纳米团簇。在聚苯胺的氧化还原单元中存在选择性离子结合作用，氧化的类醌亚胺（QI）能强结合Ru络合物离子，而还原的苯胺（BA）则不能。通过优化QI与BA的比例，Ru配合物在空间上被限制在聚苯胺骨架的外层。钌-聚苯胺杂化的炭化在碳载体的外表面诱导成核，生成几乎单分散的钌纳米团簇。该催化剂的Ru负载仅为2 wt%，但表现出超高的析氢活性，是商用Pt/C催化剂的7倍。

We successfully applied redox units of polyaniline (PAni) to in-situ cooperatively assemble highly active Ru nanoclusters in a hierarchically-ordered carbon electrode. There is a selective ion-bonding effect in the redox units of PAni that the oxidized quinonoid imine (QI) can strongly bond Ru complex ions whereas the reduced benzenoid amine (BA) cannot. By optimizing the ratio of QI to BA, Ru complexes were spatially confined in the outer layer of the PAni framework. Carbonization of Ru-PAni hybrid induced nucleation in the outer surface of the carbon support, generating nearly monodisperse Ru nanoclusters. The catalyst had only 2 wt% loading of Ru, but exhibited an ultrahigh mass activity for the hydrogen evolution reaction that is 7 times better than commercial Pt/C catalyst.