Issue 11, 2021

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

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 Ni2+, Co2+/3+ or Zn2+ into IrO2/CuO. The electrophilicity of Ir4+ 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 Ir4+ motivates enriched *CH3 concentration and subsequent C–C coupling for C2H4 formation, while the Lewis acid promotes ethanol formation from C2H4 involving lattice O and H2O. The ethanol selectivity presents a quasi-linear relationship with (LAS–BAS)/LAS.

Graphical abstract: Lewis acid (Ni2+, Co2+/3+ or Zn2+) modified electron-deficient Ir4+ in IrO2/CuO for promoting methane oxidation to ethanol and methanol

Supplementary files

Article information

Article type
Paper
Submitted
06 Nov 2020
Accepted
05 Feb 2021
First published
05 Feb 2021

J. Mater. Chem. A, 2021,9, 7094-7101

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

L. Yang, J. Huang, J. Cen, D. Chen, H. Zeng, Z. Rui, R. Luque and P. Duan, J. Mater. Chem. A, 2021, 9, 7094 DOI: 10.1039/D0TA10842A

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