Competing double-exchange/super-exchange ordering for enhanced water oxidation kinetics

Alpana Sahu; Aswathi K S; Amit Kumar Rajak; Roshan Naik; Mohammad Qureshi

doi:10.1039/d3cc04484j

Competing double-exchange/super-exchange ordering for enhanced water oxidation kinetics

Chem Commun (Camb). 2024 Feb 20;60(16):2236-2239. doi: 10.1039/d3cc04484j.

Authors

Alpana Sahu¹, Aswathi K S¹, Amit Kumar Rajak¹, Roshan Naik¹, Mohammad Qureshi¹

Affiliation

¹ Materials Science Laboratory, Department of Chemistry, Indian Institute of Technology Guwahati, Assam, India. mq@iitg.ac.in.

PMID: 38315556
DOI: 10.1039/d3cc04484j

Abstract

Competing double-exchange and super-exchange interactions yield rich chemistry for understanding robust oxygen evolution activity in Ru-doped lanthanum strontium manganite, with an overpotential of 300 mV at 10 mA cm^-2 and a Tafel slope of 110 mV dec^-1. Favourable redox potentials of Mn³⁺/Mn⁴⁺ and Ru⁴⁺/Ru⁵⁺ lead to improved charge transfer kinetics for OER activity.