3 years ago
Structure-engineered electrocatalyst enables highly active and stable oxygen evolution reaction over layered perovskite LaSr3Co1.5Fe1.5O10-δ
To accelerate the kinetics of oxygen evolution reaction (OER) on H2 O oxidation regarding the energy conversion and storage approaches, the discovery and design of desirable cost-effective and highly efficient electrocatalysts is of prime importance. This study demonstrates a novel layered perovskite via Co-doping strategy, i.e. LaSr3 Co1.5 Fe1.5 O10-δ , which possesses significantly higher electrocatalytic activity, considerably lower overpotential and Tafel slope, remarkably higher mass activity (MA) and specific activity (SA) together with a better long-term stability than the undoped parent perovskite, the state-of-the-art IrO2 and the most active Ba0.5 Sr0.5 Co0.8 Fe0.2 O3-δ (BSCF) under harsh OER cycling conditions in alkaline solution. These merits mainly originate from the presence of partial oxidation of surface Co3+ to Co4+ in LaSr3 Co1.5 Fe1.5 O10-δ , an appropriate possible structure-dependent position of O p -band centre to the Fermi level and an increased amount of highly oxidative oxygen species O2 2-/O- in conjunction with a strong OH- adsorption and O2 desorption abilities. These findings not only improve the electrocatalytic activities of the layered perovskite family via optimal doping but also highlight the potential application of LaSr3 Co1.5 Fe1.5 O10-δ as an earth-abundant, cost-effective, highly active and durable electrocatalyst for OER in energy conversion and storage technologies.
Publisher URL: www.sciencedirect.com/science
DOI: S2211285517304767
You might also like
Never Miss Important Research
Researcher is an app designed by academics, for academics. Create a personalised feed in two minutes.
Choose from over 15,000 academics journals covering ten research areas then let Researcher deliver you papers tailored to your interests each day.
Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.