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Journal article
Quantum confined one-dimensional lepidocrocite titanate catalyst for superior electrocatalytic oxygen evolution performance
Chemical engineering journal (Lausanne, Switzerland : 1996), v 533, 174482
01 Apr 2026
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Abstract
Intercalated one-dimensional lepidocrocite (1DL) titanate structures have emerged as promising platforms for diverse applications due to their extreme specific surface areas, structural versatility and functional tunability. We recently developed a highly scalable, inexpensive and simple technique to synthesize quantum confined 1DL titanate nanofilaments, NFs. X-ray diffraction, density functional theory, and transmission electron microscopy analyses revealed that the building blocks are 1D NFs with cross-sectional dimensions of ≈ 5 × 7 Å. These NFs stack along [020] and grow along the [100] direction. Herein, we demonstrate that the oxygen evolution reaction (OER) performance can be significantly enhanced through the incorporation of cobalt and iron cations via intercalation. One of the resulting compositions, co-doped with Co and Fe in a 70:30 molar ratio displayed an ultralow overpotential of 251 mV at a current density of 10 mA cm−2. Long-term durability tests on this electrode (100 h at 10 mA/cm2, and 150 h at 500 mA/cm2) indicated that the electrocatalyst was highly stable, exhibiting minimal degradation. Post-stability analysis revealed that the material remains on the electrode surface with uniform distribution and compositions. This work provides a new avenue for the development of efficient 1DL-based electrocatalysts through transition metal cation intercalation to enhance the OER activity.
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Details
- Title
- Quantum confined one-dimensional lepidocrocite titanate catalyst for superior electrocatalytic oxygen evolution performance
- Creators
- Devraj Singh - Drexel UniversityMohamed A. Ibrahim - Drexel UniversityAidan McMoil - Drexel UniversityG. Schwenk - Drexel UniversityJoshua Snyder - Drexel UniversityMichel W. Barsoum (Corresponding Author) - Drexel University
- Publication Details
- Chemical engineering journal (Lausanne, Switzerland : 1996), v 533, 174482
- Publisher
- Elsevier
- Number of pages
- 9
- Grant note
- Division of Materials Research of NSF: DMR-2211319
The authors gratefully acknowledge financial support from Division of Materials Research of NSF (DMR-2211319) . We thank the Materials Characterization Core Facility at Drexel University for assistance with PXRD, SEM, TEM and XPS analyses. We also acknowledge that some of the schematic illustrations were partially created using BioRender.com . Additionally, we would like to thank Agilent Technologies for providing the ICP-MS measurements using an Agilent 8900 triple quadrupole ICP-MS (ICP-QQQ) instrument.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Chemical and Biological Engineering
- Web of Science ID
- WOS:001738531300001
- Scopus ID
- 2-s2.0-105031764741
- Other Identifier
- 991022164643004721
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- Web of Science research areas
- Engineering, Chemical
- Engineering, Environmental