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

doi:10.1016/j.xcrp.2022.101106

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 journal › Article › peer-review

50 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 language	English
Article number	101106
Journal	Cell Reports Physical Science
Volume	3
Issue number	11
DOIs	https://doi.org/10.1016/j.xcrp.2022.101106
State	Published - 16 Nov 2022
Externally published	Yes

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.

Funders	Funder number
CCUS
SERB , India	CRG/2020/001239
SERB, India
TMD
Department of Science and Technology, Ministry of Science and Technology, India
Indian Institute of Technology Bombay	202221044417

Keywords

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.xcrp.2022.101106

Cite this

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title = "A Janus cerium-doped bismuth oxide electrocatalyst for complete water splitting",

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.",

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AU - Saini, Abhishek

AU - Potbhare, Ajay

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AU - Vishal, Vikram

AU - Ghosh, Prakash C.

AU - Dutta, Arnab

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AB - 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.

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

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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