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Selective photoelectrochemical oxidation of glucose to glucaric acid by single atom Pt decorated defective TiO 2 .

Zhangliu TianYumin DaMeng WangXinyu DouXinhang CuiJie ChenRui JiangShibo XiBaihua CuiYani LuoHaotian YangYu LongYukun XiaoWei Chen
Published in: Nature communications (2023)
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 TiO 2 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 TiO 2 photoanode shows greatly improved charge separation and significantly enhanced selectivity and yield of C 6 products. By decorating single-atom Pt on the defective TiO 2 photoanode, selective oxidation of glucose to glucaric acid can be achieved. In this work, defective TiO 2 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.
Keyphrases
  • visible light
  • quantum dots
  • electron transfer
  • blood glucose
  • molecular dynamics
  • hydrogen peroxide
  • type diabetes
  • nitric oxide
  • blood pressure
  • wastewater treatment
  • label free
  • highly efficient
  • solar cells