Developing highly efficient and durable electrocatalysts for the oxygen reduction reaction (ORR) is essential for commercializing renewable and clean energy, but this remains a challenge. Herein, we design an electrocatalyst by confining Pt nanoparticles on a conjugated nitrogen-rich covalent organic framework (COF) and demonstrate its ORR activity in an acid electrolyte. In the catalyst, multiple pyridinic nitrogens act as nucleation sites for controllably growing Pt in a layer over the COF’s surface and the pore channel, resulting in uniform Pt distribution and more accessible Pt active sites. The catalyst exhibits ultrahigh ORR activity with an onset potential of 1.05 V versus reversible hydrogen electrode and a half-wave potential of 0.89 V, which are more positive than those of commercial Pt/C and other reported catalysts. This strategy offers a new way to fabricate electrocatalysts with atomically definite active sites and high-performance catalytic activities for clean energy storage and conversion.

中文翻译：

---

共轭共价有机骨架作为铂纳米颗粒载体，用于催化氧还原反应

开发用于氧气还原反应（ORR）的高效耐用的电催化剂对于使可再生能源和清洁能源商业化至关重要，但这仍然是一个挑战。在本文中，我们通过将Pt纳米粒子限制在共轭富氮共价有机骨架（COF）上来设计电催化剂，并证明其在酸性电解质中的ORR活性。在催化剂中，多个吡啶氮原子作为成核位点，可控地在COF表面和孔通道上方的层中生长Pt，从而导致Pt分布均匀且Pt活性位点更易接近。该催化剂表现出超高的ORR活性，相对可逆氢电极的起始电势为1.05 V，半波电势为0.89 V，比市售Pt / C和其他报道的催化剂更具正电性。