Group Leader

Li, Guowei
Guowei Li
Post-doctoral research scientist
Phone: +49 351 4646-3323
Room: B2.3.23

Thermoelectrics

Group Members

Yang, Qun
Qun Yang
Graduate student
Phone: +49 351 4646-3323
Room: B2.3.23

Theory of Topology

Collaborations

Prof. Xinliang Feng

Technische Universität Dresden, Germany

Email: sabine.strecker@tu-dresden.de

Prof. Dr. Benjamin List

Max-Planck-Institut für Kohlenforschung

Email: list@kofo.mpg.de

Publication Highlights

Topological Catalysis

Figure 1. In the surface catalysis process, electronic states of a trivial phase are most vulnerable to contamination and defects, while they are robust for topological catalysts. Zoom Image

Figure 1. In the surface catalysis process, electronic states of a trivial phase are most vulnerable to contamination and defects, while they are robust for topological catalysts.

Searching efficient and cost-effective catalysts that can replace pure Pt is one of the most important subjects in the area of catalysis. However, in spite of various advanced electrocatalysts have been designed in the last two decades based on nano-engineering such as doping, surface modification, and alloying, the replacement of pure Pt as catalysts is still not achieved.

The observation of fantastic physical properties in topological materials bring us hopes that with these unique phases we can design and synthesis high-efficient catalysts for electrochemical conversion technologies. The band inversion in topological materials leads to numerous favorable physical properties such as robust surface states, extremely high conductivity, and high carrier mobility, which significantly influence the interfacial charge transfer and transport behavior in the catalytic process. In addition, the topological surface states (TSS) can act as both electron acceptors or donators for small adsorbed molecules, consequently tailoring the adsorption energy and Gibbs free energy by choosing a topological phase with a specific electronic structure.

Beside the designing of superior catalysis with the guidance of topology, we are also interest in the understanding of the underlying factors that governing the surface catalysis process. The high-quality bulk single crystal with defined crystal surface can serve as an ideal platform for realizing the interaction between adsorbates and the non-trivial surface states. Our long-term goal is to tune the catalytic reaction pathway by topological materials employing external parameters such as magnetic field and polarized light.

Figure 2. Chiral electrons in topological semimetals could interact with polarized light or magnetic field. This influence the chemical potential of electrons and then tailoring the catalytic behaviors. Zoom Image

Figure 2. Chiral electrons in topological semimetals could interact with polarized light or magnetic field. This influence the chemical potential of electrons and then tailoring the catalytic behaviors.

 
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