Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 300, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120723
Keywords
Amorphous cobalt oxide; Glycerol oxidation; operando Raman spectroscopy; Structural evolution
Funding
- Young Scholar Fellowship Program by Ministry of Science and Technology (MOST) in Taiwan [MOST110-2636-E-011-004]
- National Taiwan University of Science and Technology
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In this study, cobalt oxide (CoOx) was shown to be an efficient and selective electrocatalyst for producing value-added dihydroxyacetone (DHA) from glycerol. Operando Raman spectroscopy revealed structural transformations between CoOx and oxyhydroxides, establishing correlations between applied potential, surface chemistry, and product distribution. This suggests the potential for using inexpensive materials for electrochemical biomass upgrading and studying catalyst activity under realistic conditions.
In this work, cobalt oxide (CoOx) has been demonstrated as an efficient and selective electrocatalyst for producing value-added dihydroxyacetone (DHA) from industrial by-product glycerol. Under optimized conditions, DHA with high selectivity up to 45% and a high production rate of 9.6 mu mol h-1 cm-2 is obtained at high current density over 3 mA cm-2 without the occurrence of the oxygen evolution reaction. Operando Raman spectroscopy features the potential-induced structural transformation between CoOx and oxyhydroxides from which a correlation among applied potential, surface chemistry of electrocatalyst, and product distribution are built. These results point toward the viability of using inexpensive materials for electrochemical biomass upgrading as well as providing opportunities for studying structural evolution and activity origin of catalysts under realistic working conditions that can be widely extended to most electrocatalytic biomass valorization processes.
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