Berlin 2018 – wissenschaftliches Programm

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SYID: Symposium Information Driven Materials Research

SYID 1: Information Driven Materials Research

SYID 1.2: Hauptvortrag

Montag, 12. März 2018, 10:00–10:30, H 0105

Rational design and synthesis of Pt-based catalysts for fuel cell applications — •Younan Xia — Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA

Platinum (Pt) is by far the best catalyst for a range of industrially important reactions, including the oxygen reduction reaction (ORR) involved in the operation of proton exchange membrane fuel cells (PEMFCs). Its low abundance, limited supply, and ever-increasing price have kept motivating researchers to minimize the loading of this precious metal in the catalyst. In this talk, I will discuss a number of strategies involving computational design and rational synthesis for greatly increasing the activity and durability of Pt-based ORR catalysts, including electronic coupling through alloying, surface strain engineering, facet-controlled synthesis, and increase of dispersion by switching to a core-shell or hollow structure. The same strategies can also be applied to other precious metals such as ruthenium (Ru), rhodium (Rh), and iridium (Ir) to significantly reduce their loadings in catalysts without compromising their performance. These strategies will enable us to achieve a sustainable use of precious metals in energy conversion, industrial catalysis, and other related applications.