Carbon-Tailored Semimetal MoP as an Efficient Hydrogen Evolution Electrocatalyst in Both Alkaline and Acid Media

Li G, Sun Y, Rao J, Wu J, Kumar A, Xu QN, Fu C, Liu E, Blake GR, Werner P, Shao B, Liu K, Parkin S, Liu X, Fahlman M, Liou SC, Auffermann G, Zhang J, Felser C, Feng X (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Advanced Energy Materials Wiley

Book Volume: 8

Article Number: 1801258

Journal Issue: 24

DOI: 10.1002/aenm.201801258

Abstract

The electrolysis processes such as hydrogen evolution reaction (HER) require high efficient catalysts with robust surface stability. A high conductivity is also necessary to speed up the charge transport between the catalyst and the electrolyte. Recently, the observation of exceedingly high conductivity in the topological semimetal MoP, has provided a model catalyst to investigate the correlation between the electrical transport and the electrocatalytic activity for the HER. Thus, MoP is encapsulated in a Mo, P codoped carbon layer (MoP@C). This composite material exhibits outstanding HER performance, with an extremely low overpotential of 49 mV at a current density of 10 mA cm−2 and a Tafel slope of 54 mV dec−1 in an alkaline medium. In addition, electron transport analysis indicates that MoP exhibits high conductivity and mobility due to the existence of triple-point fermions and a complex Fermi surface. Furthermore, the presence of PC and MoC bonds at the interface between the carbon layer and the MoP particles modulates the band structure of MoP@C and facilitates fast electron transfer, accumulation, and subsequent delocalization, which are in turn responsible for the excellent HER activity.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) University of Maryland US United States (USA) (US) Linköpings universitet / Linköping University SE Sweden (SE) University of Groningen / Rijksuniversiteit Groningen NL Netherlands (NL) Max-Planck-Institut für Mikrostrukturphysik (MSP) / Max Planck Institute for Microstructure Physics DE Germany (DE) Chinese Academy of Sciences (CAS) / 中国科学院 CN China (CN) Technische Universität Dresden DE Germany (DE)

How to cite

APA:

Li, G., Sun, Y., Rao, J., Wu, J., Kumar, A., Xu, Q.N.,... Feng, X. (2018). Carbon-Tailored Semimetal MoP as an Efficient Hydrogen Evolution Electrocatalyst in Both Alkaline and Acid Media. Advanced Energy Materials, 8(24). https://doi.org/10.1002/aenm.201801258

MLA:

Li, Guowei, et al. "Carbon-Tailored Semimetal MoP as an Efficient Hydrogen Evolution Electrocatalyst in Both Alkaline and Acid Media." Advanced Energy Materials 8.24 (2018).

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