Coordination environment and architecture engineering over Co4N-based nanocomposite for accelerating advanced oxidation processes
Tian, Shuanghong 1Li, Ping 1Lin, Yunan 1Huang, Quhua 1Li, Wenqin 1Zhao, Shien 1Fu, Yi 1Chu, Feng1
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作者信息
1. Sun Yat Sen Univ
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Abstract
Innovating new Co-based materials to outperform widely-used Co3O4-based ones for eliminating recalcitrant pollutants via peroxymonosulfate (PMS) activation is dauntingly challenging. Herein we highlight for the first time that Co4N is a new-generation PMS activator, and illuminate comprehensive understanding of intrinsic activity correlated with coordination environment of Co site. The nanocomposite comprising Co4N nanoparticles immobilized on rGO, derived from a metal-organic complex, presents remarkable catalysis for 4-chlomphenol degradation via PMS activation, particularly, up to 42 times of promotion is harvested relative to Co(3)O(4-)based catalyst with similar morphology (0.682 vs 0.016 min(-1)). Theoretical calculations unravel that with respect to the common-used Co3O4 and Co, Co4N featuring N incorporated into interstices of Co framework has more suitable electronic structure to render optimal binding strength for PMS activation. This work points to the potential of Co-based nitrides for PMS activation, and enlightens that subtle engineering over coordination environment and architecture promises boosted catalysis.
NSTL
Elsevier