Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 64: Nanostructures, Nanostructuring and Nanosized Soft Matter II
CPP 64.11: Vortrag
Donnerstag, 15. März 2018, 12:15–12:30, PC 203
Efficient hydrogen evolution on triple point fermion semimetal MoP — •Guowei Li1, Gudrun Auffermann1, Jian Zhang2, Xinliang Feng2, and Claudia Felser1 — 1Max Planck Institute for Chemical Physics of Solids, 01187, Dresden, Germany — 2Center for Advancing Electronics Dresden (cfaed), Department of Chemistry and Food Chemistry, Dresden University of Technology, 01062, Dresden, Germany
Materials in topological state result in many exotic properties such as large magnetoresistance, high conductivity, and an intrinsic Hall effect. However, their function in the field of chemistry has generally been overlooked and has attracted little attention. The observation of extremely high conductivity and Weyl nodes in MoP motivates us to design high performance electrocatalyst. Mo-P co-doped carbon layer@MoP was synthesized and exhibits outstanding electrocatalytic activity for the hydrogen evolution reaction (HER) with an overpotential of 49 mV at the current density of 10 mA/cm2, and a Tafel slope of 54 mV per decade in alkaline media. All these make it one of the best non-noble metal hydrogen evolution electrocatalysts and even approaches to that of commercial Pt/C catalyst. The formation of P-C and Mo-C bonding in the interface and layers were able to shape the band structure more favoring for the electron accumulation and de-localization, resulting the high HER activity with a large exchange current density. The results here show a new way for the modification of carbon coating, which we can used for designing of high-performance HER electrocatalysts in both acid and alkaline media.