An efficient and durable trifunctional electrocatalyst for zinc–air batteries driven overall water splitting

Natarajan Logeshwaran; Shanmugam Ramakrishnan; Selvaraj Selva Chandrasekaran; Mohanraj Vinothkannan; Ae Rhan Kim; Sivaprakash Sengodan; Dhinesh Babu Velusamy; Purushothaman Varadhan; Jr-Hau He; Dong Jin Yoo

doi:10.1016/j.apcatb.2021.120405

Author(s)

Natarajan Logeshwaran
Shanmugam Ramakrishnan
Selvaraj Selva Chandrasekaran
Mohanraj Vinothkannan
Ae Rhan Kim
Sivaprakash Sengodan
Dhinesh Babu Velusamy
Purushothaman Varadhan
Dong Jin Yoo

Related Research Unit(s)

Department of Materials Science and Engineering

Detail(s)

Original language	English
Article number	120405
Journal / Publication	Applied Catalysis B: Environmental
Volume	297
Online published	1 Jun 2021
Publication status	Published - 15 Nov 2021

Link(s)

DOI	DOI https://doi.org/10.1016/j.apcatb.2021.120405 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85107442892&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(a9606f35-a24e-4be3-8825-87a86775e6c3).html

Abstract

Constructing more active and durable trifunctional electrocatalysts is key for boosting overall water splitting and metal–air battery efficiency. Herein, we developed a trifunctional electrocatalyst of ultrafine Pt nanoparticles anchored on CoS₂-N-doped reduced graphene oxide (Pt@CoS₂-NrGO). Owing to its more Pt active sites with rapid ion/electron transport ability, the Pt@CoS₂-NrGO shows excellent trifunctional activities towards HER (η₁₀ = 39 mV), OER (η₁₀ = 235 mV) ORR (E_1/2 = 0.85 V vs. RHE) and water splitting device of Pt@CoS₂-NrGO||Pt@CoS₂-NrGO achieved cell voltage of 1.48 V at 10 mA cm⁻², which is better than Pt-C||RuO₂. Finally, we employed Pt@CoS₂-NrGO as air cathode for zinc–air battery to display a power density of 114 mW cm^-2 and durability of 55 h, outperforming than Pt-C + RuO₂ based zinc–air batteries. For practical aspects, Pt@CoS₂-NrGO based zinc–air batteries were connected to overall water splitting device to produce H₂ and O₂ gases for hydrogen fuel cell.

Research Area(s)

Density functional theory, Overall water splitting, Pt@CoS2-NrGO, Trifunctional electrocatalyst, Zinc–air battery

Citation Format(s)

[ RIS ] [ BibTeX ]

An efficient and durable trifunctional electrocatalyst for zinc–air batteries driven overall water splitting. / Logeshwaran, Natarajan; Ramakrishnan, Shanmugam; Chandrasekaran, Selvaraj Selva et al.

In: Applied Catalysis B: Environmental, Vol. 297, 120405, 15.11.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

Logeshwaran, N, Ramakrishnan, S, Chandrasekaran, SS, Vinothkannan, M, Kim, AR, Sengodan, S, Velusamy, DB, Varadhan, P, He, J-H & Yoo, DJ 2021, 'An efficient and durable trifunctional electrocatalyst for zinc–air batteries driven overall water splitting', Applied Catalysis B: Environmental, vol. 297, 120405. https://doi.org/10.1016/j.apcatb.2021.120405

Logeshwaran, N., Ramakrishnan, S., Chandrasekaran, S. S., Vinothkannan, M., Kim, A. R., Sengodan, S., Velusamy, D. B., Varadhan, P., He, J-H., & Yoo, D. J. (2021). An efficient and durable trifunctional electrocatalyst for zinc–air batteries driven overall water splitting. Applied Catalysis B: Environmental, 297, [120405]. https://doi.org/10.1016/j.apcatb.2021.120405

Logeshwaran N, Ramakrishnan S, Chandrasekaran SS, Vinothkannan M, Kim AR, Sengodan S et al. An efficient and durable trifunctional electrocatalyst for zinc–air batteries driven overall water splitting. Applied Catalysis B: Environmental. 2021 Nov 15;297:120405. Epub 2021 Jun 1. doi: 10.1016/j.apcatb.2021.120405

Logeshwaran, Natarajan ; Ramakrishnan, Shanmugam ; Chandrasekaran, Selvaraj Selva et al. / An efficient and durable trifunctional electrocatalyst for zinc–air batteries driven overall water splitting. In: Applied Catalysis B: Environmental. 2021 ; Vol. 297.