“…[1][2][3] Noble metal Pt-based catalysts are state-of-the-art ORR catalysts with low overpotential and high catalytic activities, which, meanwhile, also suffer from scarce earth reserves, high cost, poor stability, and low resistance to poisoning. [4][5][6][7][8][9] Therefore, developing efficient, durable, and economical ORR electrocatalysts to replace noble metal-based catalysts has drawn worldwide attention.…”