2025/01/01 by Yu‐Chang Huang, Po-Hao Tseng, Yen‐Zen Wang +3 · 1 voice
Energy · Engineering · #Advanced battery technologies research #Electrocatalysts for Energy Conversion #Fuel Cells and Related Materials
paper · pdf · doi:10.1515/epoly-2025-0043
openalex publication_date 2025/01/01 · openalex created_date 2025/10/23 · openalex updated_date 2026/06/28
Abstract This study presents a sustainable strategy for the development of metal-free electrocatalysts derived from degraded aromatic co-poly(urea-thiourea)s. Upon pyrolysis under a nitrogen atmosphere, the polymers are transformed into N, S-co-doped turbostratic carbon nanomaterials with a high specific surface area exceeding 1,000 m 2 ·g −1 and an optimized electronic structure. The resulting materials exhibit outstanding electrocatalytic performance in the oxygen reduction reaction (ORR), characterized by a high onset potential (0.96 V), half-wave potential (0.82 V), large limiting current density (−6.21 mA·cm −2 ), and a low Tafel slope (87.6 mV·dec −1 ). The number of electrons transferred during ORR is close to 3.9, approaching the ideal four-electron pathway. The material delivers a maximum power density of 443.8 mW·cm −2 , outperforming that of commercial Pt/C.