Solar-driven highly selective conversion of glycerol to dihydroxyacetone using surface atom engineered BiVO4 photoanodes

Yuan Lu, Byoung Guan Lee, Cheng Lin, Tae-Kyung Liu, Zhipeng Wang, Jiaming Miao, Sang Ho Oh, Ki Chul Kim (), Kan Zhang () and Jong Hyeok Park ()
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Yuan Lu: Nanjing University of Science and Technology
Byoung Guan Lee: Konkuk University
Cheng Lin: Nanjing University of Science and Technology
Tae-Kyung Liu: Yonsei University, 50 Yonsei-ro, Seodaemun-gu
Zhipeng Wang: Sungkyunkwan University
Jiaming Miao: Nanjing University of Science and Technology
Sang Ho Oh: Korea Institute of Energy Technology (KENTECH)
Ki Chul Kim: Konkuk University
Kan Zhang: Nanjing University of Science and Technology
Jong Hyeok Park: Yonsei University, 50 Yonsei-ro, Seodaemun-gu

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Dihydroxyacetone is the most desired product in glycerol oxidation reaction because of its highest added value and large market demand among all possible oxidation products. However, selectively oxidative secondary hydroxyl groups of glycerol for highly efficient dihydroxyacetone production still poses a challenge. In this study, we engineer the surface of BiVO4 by introducing bismuth-rich domains and oxygen vacancies (Bi-rich BiVO4-x) to systematically modulate the surface adsorption of secondary hydroxyl groups and enhance photo-induced charge separation for photoelectrochemical glycerol oxidation into dihydroxyacetone conversion. As a result, the Bi-rich BiVO4-x increases the glycerol oxidation photocurrent density of BiVO4 from 1.42 to 4.26 mA cm−2 at 1.23 V vs. reversible hydrogen electrode under AM 1.5 G illumination, as well as the dihydroxyacetone selectivity from 54.0% to 80.3%, finally achieving a dihydroxyacetone production rate of 361.9 mmol m−2 h−1 that outperforms all reported values. The surface atom customization opens a way to regulate the solar-driven organic transformation pathway toward a carbon chain-balanced product.

Date: 2024
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DOI: 10.1038/s41467-024-49662-7

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