Morphology-engineered porous flower-like CoNi-LDO with oxygen vacancies for the production of aromatic amines through waste H2S

The efficient utilization of hydrogen resources in H₂S has aroused great attention in both resource utilization and environmental protection. Using H₂S as a hydrogen resource donor for the reduction of nitrobenzene to aniline could be an effective method to replace H₂. Herein, we fabricated the porous flower-like CoNi-LDO catalyst through facile morphology control engineering, which utilizes DMF as an intercalating agent to influence the structure and properties. Endowed with abundant electron-rich oxygen vacancies and enhanced basic sites capacity, the as-designed CoNi-D catalyst exhibits considerable aniline selectivity (96 %) and high catalytic stability over seven cycles at 110 °C. The potential single H-induced dissociation pathway for the reduction of nitrobenzene to aniline by H₂S was explored using in situ FT-IR analysis. The present study could provide a feasible strategy for designing catalysts for the high-value utilization of H₂S.