Selective photoelectrochemical oxidation of glucose to glucaric acid by single atom Pt decorated defective TiO2

Zhangliu Tian (), Yumin Da, Meng Wang, Xinyu Dou, Xinhang Cui, Jie Chen, Rui Jiang, Shibo Xi, Baihua Cui, Yani Luo, Haotian Yang, Yu Long, Yukun Xiao and Wei Chen ()
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Zhangliu Tian: National University of Singapore
Yumin Da: National University of Singapore
Meng Wang: National University of Singapore
Xinyu Dou: National University of Singapore
Xinhang Cui: National University of Singapore
Jie Chen: Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University
Rui Jiang: Tianjin University
Shibo Xi: Agency for Science, Technology and Research (A*STAR)
Baihua Cui: National University of Singapore
Yani Luo: National University of Singapore
Haotian Yang: National University of Singapore
Yu Long: National University of Singapore
Yukun Xiao: National University of Singapore
Wei Chen: National University of Singapore

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Photoelectrochemical reaction is emerging as a powerful approach for biomass conversion. However, it has been rarely explored for glucose conversion into value-added chemicals. Here we develop a photoelectrochemical approach for selective oxidation of glucose to high value-added glucaric acid by using single-atom Pt anchored on defective TiO2 nanorod arrays as photoanode. The defective structure induced by the oxygen vacancies can modulate the charge carrier dynamics and band structure, simultaneously. With optimized oxygen vacancies, the defective TiO2 photoanode shows greatly improved charge separation and significantly enhanced selectivity and yield of C6 products. By decorating single-atom Pt on the defective TiO2 photoanode, selective oxidation of glucose to glucaric acid can be achieved. In this work, defective TiO2 with single-atom Pt achieves a photocurrent density of 1.91 mA cm−2 for glucose oxidation at 0.6 V versus reversible hydrogen electrode, leading to an 84.3 % yield of glucaric acid under simulated sunlight irradiation.

Date: 2023
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DOI: 10.1038/s41467-023-35875-9

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