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

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

10 Scopus Citations
View graph of relations

Author(s)

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

Detail(s)

Original languageEnglish
Article number120405
Journal / PublicationApplied Catalysis B: Environmental
Volume297
Online published1 Jun 2021
Publication statusPublished - 15 Nov 2021

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 (E1/2 = 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)

An efficient and durable trifunctional electrocatalyst for zinc–air batteries driven overall water splitting. / Logeshwaran, Natarajan; Ramakrishnan, Shanmugam; Chandrasekaran, Selvaraj Selva; Vinothkannan, Mohanraj; Kim, Ae Rhan; Sengodan, Sivaprakash; Velusamy, Dhinesh Babu; Varadhan, Purushothaman; He, Jr-Hau; Yoo, Dong Jin.

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 journalpeer-review