Dual-Modified C–Ce–Mn2O3 Heterostructured Anode Catalytic Layer with Ultrastable OER Performance in Concentrated H2SO4 for Sustainable Nonferrous Metal Electrodeposition

作者：Liangxing Jiang, Jiawei Chen, Yulin Zhou, Jin Liu, Fangyang Liu, Zongliang Zhang, Jitao Qin, Yanqing Lai, Jie Li · 发表于：ACS Applied Materials & Interfaces · 年份：2025 · DOI：10.1021/acsami.5c10369 · 被引用次数：4 · 研究领域：Electrocatalysts for Energy Conversion、Advancements in Battery Materials、Advanced battery technologies research

Mn 2 O 3 emerges as a viable anode catalytic layer candidate for nonferrous metal electrodeposition, yet its industrial adoption is hindered by acid-triggered structural collapse and Mn 3+ overoxidation. Here, we demonstrate a heterointerfacial engineering strategy that integrates carbon scaffolding with Ce-doped Mn 2 O 3 (C–Ce–Mn 2 O 3 ), achieving high stability in concentrated sulfuric acid (160 g·L –1 ) under aggressive polarization. The C–Ce–Mn 2 O 3 anode sustained operation for 104.3 h at a current density of 1 A·cm –2 before reaching the operational failure threshold, whereas pristine Mn 2 O 3 failed within 53.0 h under identical conditions, demonstrating 100.7% longer operational durability, corresponding to the 1095-day theoretical lifetime 2.07-fold over pristine Mn 2 O 3 . Density functional theory reveals that the injection of electrons from the Ce 4f orbital into toward Mn(III) optimizes the spin-down electronic state of Mn 3d and serves as an electron-sacrificing buffer zone for Mn(III), avoiding the overoxidation of Mn(III). The test results of Proto-LXRD indicate that carbon fiber can effectively reduce the internal stress of Mn 2 O 3, increase the coating strength, and suppress the cracking and shell formation of the catalytic layer during electrochemical corrosion.