A Janus cerium-doped bismuth oxide electrocatalyst for complete water splitting

S. K.Tarik Aziz, Mayuri Ummekar, Imran Karajagi, S. K. Riyajuddin, K. V.R. Siddhartha, Abhishek Saini, Ajay Potbhare, Ratiram G. Chaudhary, Vikram Vishal, Prakash C. Ghosh, Arnab Dutta

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Green hydrogen production from water electrolysis typically requires a set of two catalysts for triggering both hydrogen and oxygen production. Here, we report cerium-doped α-Bi2O3 nanosheets covered with reduced graphene oxide capable of both electrocatalytic oxygen evolution reaction and hydrogen evolution reaction in the same alkaline media. This rationally designed material achieves oxygen evolution and hydrogen production current density of 10 mA cm−2 at relatively low overpotentials of 0.245 and 0.334 V, respectively, while retaining its reactivity over 24 h with minimal loss of Faradaic efficiency. A two-electrode setup is devised by immobilizing this robust and dual-active electrocatalyst on commercially available stainless steel (SS) mesh, which operates at a relatively low cell voltage (1.78 V). The electrocatalytic reactivity remains intact even after cross-polarization. Hence this Janus catalytic material may be an apt choice for developing an economical, efficient, eco-friendly alkaline water electrolyzer.

Original languageEnglish
Article number101106
JournalCell Reports Physical Science
Volume3
Issue number11
DOIs
StatePublished - 16 Nov 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022 The Authors

Funding

The authors would like to acknowledge support from SERB, India (CRG/2020/001239), and DST (DST/TMD/CCUS/CoE/2020/IITB (G) for this research activity. The authors would like to thank IIT Bombay for the research facilities. Conceptualization: S.K.T.A. V.V. and A.D.; methodology: S.K.T.A. R.G.C. P.C.G. and A.D.; investigation: S.K.T.A. I.K. M.U. K.V.R.S. S.R. A.P. A.S. R.G.C. P.C.G. and A.D.; visualization: S.K.T.A. and A.D.; funding acquisition: R.G.C. V.V. P.C.G. and A.D.; project administration: A.D.; supervision: R.G.C. and A.D.; writing – original draft: S.K.T.A. and A.D.; writing – review & editing: S.K.T.A. I.K. M.U. K.V.R.S. A.S. R.G.C. V.V. P.C.G. and A.D. S.K.T.A. V.V. and A.D. have filed a provisional patent application together lodged with IIT Bombay (Provisional Indian Patent Application No. 202221044417) based on this work. We support inclusive, diverse, and equitable conduct of research. The authors would like to acknowledge support from SERB , India ( CRG/2020/001239 ), and DST ( DST/TMD/CCUS/CoE/2020/IITB (G) for this research activity. The authors would like to thank IIT Bombay for the research facilities.

FundersFunder number
CCUS
SERB , IndiaCRG/2020/001239
SERB, India
TMD
Department of Science and Technology, Ministry of Science and Technology, India
Indian Institute of Technology Bombay202221044417

    Keywords

    • H evolution reaction electrocatalyst
    • HER
    • Janus catalyst
    • O evolution reaction electrocatalyst
    • OER
    • alkaline water electrolysis

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