Lewis acid (Ni2+, Co2+/3+ or Zn2+) modified electron-deficient Ir4+ in IrO2/CuO for promoting methane oxidation to ethanol and methanol. Issue 11 (23rd February 2021)

• Record Type: Journal Article
• Authors: Yang, Le; Huang, Jinxu; Cen, Jie; Chen, De-Li; Zeng, Hui; Rui, Zebao; Luque, Rafael; Duan, Peigao
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 11(2021)
• Page Start: 7094
• Page End: 7101
• Publication Date: 2021-02-23
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta10842a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : This work delineates the first attempt to tune the product distribution between methanol and ethanol in the direct oxidation of methane reaction by incorporating Lewis acids Ni 2+, Co 2+/3+ or Zn 2+ into IrO2 /CuO. Abstract : This work delineates the first attempt to tune the product distribution between methanol and ethanol in the direct oxidation of methane reaction by incorporating Lewis acids Ni 2+, Co 2+/3+ or Zn 2+ into IrO2 /CuO. The electrophilicity of Ir 4+ and the (LAS–BAS)/LAS ratio (LAS: Lewis acid sites, BAS: Brønsted acid sites) are demonstrated to be two reactivity descriptors motivating CH4 activation and ethanol formation, respectively. Electron-deficient Ir 4+ motivates enriched *CH3 concentration and subsequent C–C coupling for C2 H4 formation, while the Lewis acid promotes ethanol formation from C2 H4 involving lattice O and H2 O. The ethanol selectivity presents a quasi-linear relationship with (LAS–BAS)/LAS.