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- Title
Nickel Sulfide/Hierarchical Porous Carbon from Spent Residue Hydrocracking Catalyst as Electrocatalyst for the Oxygen Evolution Reaction.
- Authors
Wang, Xinhao; Hou, Yunhui; Ge, Shaohui; Hou, Yuandong; Wu, Zhijie; Chen, Zhaojun; Gao, Ruitong; Du, Hui
- Abstract
Spent residue slurry‐phase hydrocracking catalyst coated with coke have been classified as hazardous solid waste, presenting serious economic and environmental issues to refiners. Herein, the spent catalysts with a nickel sulfide nanoparticle/coke hierarchical structure (NiSX/C) from our previous work were used to prepare nickel sulfide/hierarchical porous carbon (NiSX/HPC) for the oxygen evolution reaction (OER) through the method of carbonization, activation, and sulfurization. The results indicate that the NiSX/C converts into Ni/HPC after carbonization and activation, and then transform into NiSX/HPC by sulfurization. The optimized NiSX/HPC‐8 possesses the crystal phase of NiS2, and the high specific surface area of 1134.9 m2 g−1 with the hierarchical micro‐mesoporous structure. Besides, NiSX/HPC‐8 achieves a low overpotential of 236 mV at 10 mA cm−2, a low Tafel slope of 64.1 mV dec−1, and excellent stability. This work provides a viable method for upcycling spent catalysts to re‐constructed OER catalysts with high catalytic performance and durability.
- Subjects
OXYGEN evolution reactions; NICKEL sulfide; HYDROCRACKING; COKE (Coal product); NICKEL catalysts; SOLID waste
- Publication
ChemPlusChem, 2023, Vol 88, Issue 9, p1
- ISSN
2192-6506
- Publication type
Article
- DOI
10.1002/cplu.202300323