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PreprintCC BYChemRxiv

Tweaking the Water Rigidity at Noble Metal Interfaces for Enhanced Alkaline Hydrogen Production via myo-Inositol Coating - A Bioinspired Approach

  • Nandita Mohandas1
  • Alex Joseph2
  • Anusha P. P.1
  • Rashmi S. Jha1
  • KM. Archana Yadav1
  • Ritesh Haldar1
  • Mateusz Marianski3,4,5
  • George John2,3,4
  • Tharangattu N. Narayanan1
5 affiliations
  1. 1Tata Institute of Fundamental Research-Hyderabad
  2. 2Department of Chemistry and Biochemistry, Center for Discovery and Innovation, The City College of New York, 85 St. Nicholas Terrace, New York, New York, USA, 10031
  3. 3PhD Program in Chemistry
  4. 4Graduate Center of the City University of New York
  5. 5Department of Chemistry and Biochemistry, Hunter College, 695 Park Avenue, New York, USA, 10065
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Abstract

Can an insulating sugar molecule help in water electrolysis? A unique cyclic polyhydroxy sugar myo-Inositol (MI) is used here to modify the oxide-free noble metal surfaces leading to enhanced electrocatalytic hydrogen evolution reaction (HER) efficacy in alkaline medium. This non-permanent surface coating approach makes the HER activity of platinum in alkaline medium on par with that in acidic medium. This HER enhancement effect of MI is also demonstrated on another metal electrode, gold. A monolayer adsorption of MI on Au and Pt is verified with quartz crystal microbalance assisted studies. The presence of MI at the metal surface introduces weakly hydrogen bonded water molecules at the electrode-electrolyte interface by disrupting the hydrogen bonding network, as proven by the operando surface enhanced infrared spectroscopy studies. This approach highlights the unique role of MI in HER and effectively mitigates the kinetic limitations of alkaline water electrolysis.

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Cite

BibTeXRIS
BibTeX
@misc{mohandas2026tweaking,
  title = {{Tweaking the Water Rigidity at Noble Metal Interfaces for Enhanced Alkaline Hydrogen Production via myo-Inositol Coating - A Bioinspired Approach}},
  author = {Nandita Mohandas and Alex Joseph and Anusha P. P. and Rashmi S. Jha and KM. Archana Yadav and Ritesh Haldar and Mateusz Marianski and George John and Tharangattu N. Narayanan},
  howpublished = {ChemRxiv},
  year = {2026},
  month = sep,
  doi = {10.26434/chemrxiv.15009471/v1},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009471/v1},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - Tweaking the Water Rigidity at Noble Metal Interfaces for Enhanced Alkaline Hydrogen Production via myo-Inositol Coating - A Bioinspired Approach
AU  - Nandita Mohandas
AU  - Alex Joseph
AU  - Anusha P. P.
AU  - Rashmi S. Jha
AU  - KM. Archana Yadav
AU  - Ritesh Haldar
AU  - Mateusz Marianski
AU  - George John
AU  - Tharangattu N. Narayanan
PY  - 2026
DA  - 2026/09/25
PB  - ChemRxiv
DO  - 10.26434/chemrxiv.15009471/v1
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009471/v1
AB  - Can an insulating sugar molecule help in water electrolysis? A unique cyclic polyhydroxy sugar myo-Inositol (MI) is used here to modify the oxide-free noble metal surfaces leading to enhanced electrocatalytic hydrogen evolution reaction (HER) efficacy in alkaline medium. This non-permanent surface coating approach makes the HER activity of platinum in alkaline medium on par with that in acidic medium. This HER enhancement effect of MI is also demonstrated on another metal electrode, gold. A monolayer adsorption of MI on Au and Pt is verified with quartz crystal microbalance assisted studies. The presence of MI at the metal surface introduces weakly hydrogen bonded water molecules at the electrode-electrolyte interface by disrupting the hydrogen bonding network, as proven by the operando surface enhanced infrared spectroscopy studies. This approach highlights the unique role of MI in HER and effectively mitigates the kinetic limitations of alkaline water electrolysis.
ER  -