CuO@TiO2 and NiO@TiO2 core-shell catalysts for hydrogen production from the photocatalytic reforming of glycerol aqueous solution

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S. P. Ramírez
J. A. Wang
M. A. Valenzuela
L. F. Chen
A. Dalai

Abstract

Hydrogen production from the photocatalytic reforming of glycerol aqueous solution was performed on the CuO@TiO2, NiO@TiO2, NiO@CuO, and CuO@NiO core-shell nanostructured catalysts under simulated solar light irradiation. These catalysts were prepared by the combination of a modified sol-gel and a precipitation-deposition method using hydroxypropyl cellulose as structural linker and they were characterized by powder X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV–Vis DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and nitrogen physisorption isotherms techniques. The catalysts containing TiO2 as a shell and CuO as core showed much higher activity compared with those formulated with NiO@CuO, CuO@NiO, and bared CuO or NiO nanoparticles. The highest rate of hydrogen production obtained with the CuO@TiO2 catalyst was as high as 153.8 μmol·g−1h-1, which was 29.0, 24.8, 11.2 and 3.2 times greater than that obtained on CuO@NiO, NiO@CuO, TiO2 P25, and NiO@TiO2 catalyst, respectively. For the high active CuO@TiO2 catalyst, after activation of TiO2 with solar light irradiation, the conduction band electrons can be transferred to CuO core through the heterojunction in the core-shell interfaces which led to CuO gradually reduced to Cu2O, favoring the reduction of proton to release hydrogen.

 

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How to Cite
Ramírez, S., Wang, J., Valenzuela, M., Chen, L., & Dalai, A. (2020). CuO@TiO2 and NiO@TiO2 core-shell catalysts for hydrogen production from the photocatalytic reforming of glycerol aqueous solution. Journal of Applied Research and Technology, 18(6), 390-409. https://doi.org/10.22201/icat.24486736e.2020.18.6.1365
Author Biographies

S. P. Ramírez

ESIQIE, Instituto Politécnico Nacional, Zacatenco, Ciudad de México, Mexico

J. A. Wang

ESIQIE, Instituto Politécnico Nacional, Zacatenco, Ciudad de México, Mexico

M. A. Valenzuela

ESIQIE, Instituto Politécnico Nacional, Zacatenco, Ciudad de México, Mexico

L. F. Chen

ESIQIE, Instituto Politécnico Nacional, Zacatenco, Ciudad de México, Mexico

A. Dalai

Department of Chemical and Biological Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon S7N 5A9, Canada