Topic of Research Seminar: Surface Defect Engineering on Perovskite Oxides as Efficient Bifunctional Electrocatalyst for Water Splitting

Abstract: The design of high-performance and cost-effective electrocatalysts for water splitting is of prime importance for efficient and sustainable hydrogen production. In this work, a surface defect engineering method is developed for optimizing the electrocatalytic activity of perovskite oxides for water electrolysis. A typical ferrite-based perovskite oxide material La0.6Sr0.4Co0.2Fe0.8O3−δ(LSCF) is used and regulated by selective acid etching. The optimal parameters for the surface treatment are identified. An efficient bifunctional perovskite oxide, denoted LSCF-30, is prepared by selectively corroding the A-site Sr element in the surface region, which is found to not only increase the exposure and decrease the coordination of B-site metals but also effectively modulate the electronic structure of these metals. The findings demonstrate an effective strategy of surface defect engineering in enhancing the performance of perovskite oxide electrocatalysts for water splitting.

Subject Field of Topic: Chemical

Name of Speaker: Ms. Amna Altaf

Professorial Rank of Speaker: PhD Scholar (Chemistry Dpt. Dpt.) SNS – NUST

Email of Speaker: [email protected]

Affiliation of Speaker: School of Natural Sciences (SNS – NUST)

Date and Venue: (Thursday) 30 January 2025, 1400 hrs, CR # 205, New Building, School of Natural Sciences (SNS), NUST Islamabad