Bifunctional Multiferroic GdCrO3 Nanoassemblies for Sustainable H2 Production Using Electro- and Photocatalysis

Huma Khan, Samuel E. Lofland, Kandalam V. Ramanujachary, Norah Alhokbany, Tokeer Ahmad

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

In the realm of energy storage and conversion powered by electro- or photocatalysts, tremendous efforts are devoted on producing effective and long-lasting oxide catalysts. Here, we demonstrate multiferroic GdCrO3 nanoassemblies synthesized using a solvothermal method. X-ray diffraction (XRD) and XPS studies confirm the orthorhombic formation of GdCrO3. Scanning and high-resolution transmission electron microscopy shows the formation of nanoassemblies. Ferroelectric study reveals the remnant polarization of 2.36 μC cm-2 and oxygen vacancies. In an alkaline media, GdCrO3 nanoassemblies act as an efficacious and resilient oxygen evolution reaction electrocatalyst by showing superior specific activity. Photocatalytic H2 evolution studies show a high H2 evolution rate of 2 mmol h-1 gcat-1 and an apparent quantum yield of 23.2%. The mechanism for significant H2 generation is established by internal electric field-associated charge transfer, as confirmed by XPS measurements.

Original languageEnglish (US)
Pages (from-to)8102-8110
Number of pages9
JournalACS Applied Energy Materials
Volume6
Issue number15
DOIs
StatePublished - Aug 14 2023

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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