2020/06/29 by Abhijit Biswas, G. Shiva Shanker, Tisita Das +3 · 6 citations
Chemistry · Energy · Materials Science · Physics and Astronomy · #Active site #Advanced Photocatalysis Techniques #Catalysis #Chemical engineering #Chemistry #Composite material #Computational chemistry #Density functional theory #Electrocatalysts for Energy Conversion #Electrochemistry #Electrode #Electronic and Structural Properties of Oxides #Materials science #Nanotechnology #Optics #Organic chemistry #Overpotential #Oxide #Oxygen #Oxygen evolution #Physical chemistry #Sapphire #Surface energy #Thin film #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1016/j.apsusc.2020.147065
published in Applied Surface Science 529, 147065 (Elsevier BV) · 18 pages. 5 figures, Published in Applied Surface Science
openalex publication_date 2020/06/29 · arxiv created 2020/07/07 · arxiv updated 2020/07/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
For generation of sustainable, clean and highly efficient energy, the electrocatalytic oxygen evolution reaction represents an attractive platform, thus inviting immense research activities in recent years. However, designing the catalyst with enhanced electrocatalytic activity remains one of the major challenges. Here, we examined the oxygen evolution reaction activities of geometrically designed (with and without step-textured morphology) thin films of an electrocatalytically active correlated metallic SrRuO3 perovskite grown on c- and r-plane sapphire substrates. On c-plane sapphire, as compared to the uniform surface, the step-textured films endowed with active Ru-sites show remarkable decrease in the overpotential (25 mV). Interestingly, the behavior is opposite for the r-plane case, highlighting the significance of the active sites, in addition with the polar surface termination of selective crystal facets. Density functional theory calculation confirms the favorable energy reaction pathway for the active site dependent enhancement in OER. Our strategy might pave the way towards designing the surfaces of various oxide thin films for high performance energy conversion based devices.