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Cathodic-Potential-Induced Amorphous TiOx Layer for Glycerol Valorization.

Xiao-Cheng Liu1, Ying Zhang1, Geng Wu1

  • 1State Key Laboratory of Advanced Environmental Technology, Department of Environmental Science and Engineering, Department of Applied Chemistry, Center of Advanced Nanocatalysis (CAN), University of Science & Technology of China, Hefei, China.

Angewandte Chemie (International Ed. in English)
|April 2, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a hydrogen-doped amorphous titanium oxide layer on TiO2 for efficient glycerol electrooxidation. This method achieves high selectivity for glyceraldehyde production, offering a sustainable and scalable electrochemical synthesis pathway.

Keywords:
TiO2amorphizationcathodic reconstructionelectrochemical oxidationglycerol valorization

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Electrochemical oxidation of glycerol is a promising low-carbon valorization route.
  • Achieving high selectivity for value-added products like glyceraldehyde is challenging due to activity-selectivity trade-offs.

Purpose of the Study:

  • To develop a strategy for enhancing glycerol electrooxidation activity and selectivity.
  • To overcome the inherent trade-off in electrochemical oxidation of glycerol.
  • To demonstrate a scalable and economically sustainable method for glyceraldehyde production.

Main Methods:

  • Fabrication of a hydrogen-doped amorphous titanium oxide layer (H-a-TiOx) on anatase TiO2.
  • Electrochemical oxidation experiments for glycerol conversion.
  • Characterization using X-ray absorption spectroscopy and solid-state 1H magic angle spinning NMR.
  • Mechanistic investigations of reaction pathways.

Main Results:

  • Achieved a glycerol-to-glyceraldehyde conversion rate of 992 mmol m-2 h-1 with >80% selectivity.
  • H-a-TiOx exhibited reduced Ti-O coordination and strengthened Ti-Ti coordination due to hydrogen incorporation.
  • Demonstrated scalable and economically sustainable performance.
  • Identified that hydrogen bonding influences C-C and C-H bond activation energies, resolving the activity-selectivity trade-off.

Conclusions:

  • Phase-engineering of TiO2 with H-doped amorphous layers is a viable strategy for sustainable electrosynthesis.
  • The developed method enables efficient and selective glycerol valorization.
  • This approach offers a practical pathway for producing high value-added chemicals using earth-abundant metal oxides.