CoN graphene encapsulated cobalt catalyst for H2O2 decomposition under acidic conditions. Issue 9 (8th June 2022)

• Record Type: Journal Article
• Authors: Yang, Liu; Yu, Pengfei; Li, Wenyuan; Cao, Fengliang; Jin, Xin; Xue, Sheng; Zhang, Xianglong; Zhang, Tingwei; Wu, Mingbo; Wu, Wenting
• Is Part Of: AIChE journal. Volume 68:Issue 9(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-08
• Subjects: CoN catalysis -- core–shell structure -- H2O2 decomposition -- industrial safety -- strong acid conditions; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.17760
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract: Hydrogen peroxide (H2 O2 ) has been listed as one of the 100 most important chemicals in the world. However, huge amount of residual H2 O2 is hard to timely decomposed into O2 and H2 O under acidic condition, easily resulting in explosion hazard. Here, we reported a core–shell structure catalyst, that is graphene with CoN structure encapsulated Co nanoparticles. CoN graphene shell serves as the active site for the H2 O2 decomposition, and Co core further enhance this decomposition. Benefiting from it, the H2 O2 decomposition were close to 100% after 6 cycles without pH adjustment, which increased 6 orders of magnitude compared with no catalyst. At the same time, the O2 generation reached 99.67% in 2 h with little metal leaching, and ·OH has been greatly inhibited to only 0.08%. This work can cleanly remove H2 O2 with little deep oxidation and protect the process of H2 O2 utilization to achieve a safer world.