Volume 35, Issue 12 e6432
RESEARCH ARTICLE

Cryptomelane nanorods coated with Ni ion doped Birnessite polymorphs as bifunctional efficient catalyst for the oxygen evolution reaction and degradation of organic contaminants

Mustafa Ulvi Gürbüz

Mustafa Ulvi Gürbüz

Department of Chemistry, Faculty of Arts and Sciences, Yıldız Technical University, Istanbul, Turkey

Contribution: Data curation (equal), ​Investigation (equal), Visualization (equal)

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Gökhan Elmacı

Corresponding Author

Gökhan Elmacı

Department of Chemistry, School of Technical Sciences, Adıyaman University, Adıyaman, Turkey

Correspondence

Ali S. Ertürk, Department of Analytical Chemistry, Faculty of Pharmacy, Adıyaman University, 02040 Adıyaman, Turkey.

Email: [email protected]

Gökhan Elmacı, Department of Chemistry, School of Technical Sciences, Adıyaman University, 02040 Adıyaman, Turkey.

Email: [email protected]

Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), Funding acquisition (equal), ​Investigation (equal), Methodology (equal), Project administration (equal), Resources (equal), Supervision (equal), Visualization (equal)

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Yajun Zhang

Yajun Zhang

State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou, China

Contribution: Formal analysis (equal)

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Xu Meng

Xu Meng

State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou, China

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Ali Serol Ertürk

Corresponding Author

Ali Serol Ertürk

Department of Analytical Chemistry, Faculty of Pharmacy, Adıyaman University, Adıyaman, Turkey

Correspondence

Ali S. Ertürk, Department of Analytical Chemistry, Faculty of Pharmacy, Adıyaman University, 02040 Adıyaman, Turkey.

Email: [email protected]

Gökhan Elmacı, Department of Chemistry, School of Technical Sciences, Adıyaman University, 02040 Adıyaman, Turkey.

Email: [email protected]

Contribution: Conceptualization (equal), Data curation (equal), Formal analysis (equal), ​Investigation (equal), Methodology (equal), Project administration (equal), Software (equal), Supervision (equal), Visualization (equal)

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First published: 02 September 2021
Citations: 7

Funding information: The Scientific and Technological Research Council of Turkey (TUBITAK) for Postdoctoral Research Scholarship Program; Youth Innovation Promotion Association CAS, Grant/Award Number: 2018456; National Natural Science Foundation of China, Grant/Award Number: 21403256

Abstract

The intelligent design or development of dual-functional catalysts using non-precious metals especially for the oxygen evolution reaction (OER) in sustainable energy systems and degradation of organic pollutants is still a difficult and a significant challenge. Furthermore, the development of these catalysts is of great importance in terms of energy security and solution of the environmental problems. To meet these requirements, herein, we describe the synthesis of a Ni-ion doped Birnessite@Cryptomelane (Ni2+/B@Cr) hybrid structure as a bifunctional efficient catalyst for the OER in neutral media and degradation of dye pollutants. The Ni2+/B@Cr catalyst exhibited a sharp onset potential at 390 mV (vs. RHE) and achieved a current density of 1 mA cm−2 at a low ƞ of 430 mV with a Tafel slope of ~96 mV dec−1. The results of electrochemical impedance spectroscopy (EIS) studies indicated that Ni intercalation into birnessite layer and heterostructure of the hybrid electrocatalyst Ni2+/B@Cr increased the conductivity by lowering the resistance of charge transfer (Rct = 4.82 Ω) and oxygen evolution processes (ROER = 4.13 Ω). The durability assay identified Ni2+/B@Cr as stable electrocatalyst with 10% loss of activity after long-term stability tests (10 h, under 500-mV overpotential). In addition, the Ni2+/B@Cr achieved high (86.67 s−1 g−1) and rapid (173 s) catalytic performance for the reduction of methylene blue (MB). Overall, this paper presents a low-cost production strategy for the design of highly efficient bifunctional catalysts, offering boosted electrocatalytic and degradation performance for water oxidation and organic dye contamination, respectively.

CONFLICT OF INTEREST

Authors declare that there is no conflict of interest.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available because of privacy/ethical restrictions.

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