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Dirac Nodal Arc Semimetal PtSn4: An Ideal Platform for Understanding Surface Properties and Catalysis for Hydrogen Evolution
Max Planck Inst Chem Phys Solids, Germany.
Max Planck Inst Chem Phys Solids, Germany.
ShanghaiTech Univ, Peoples R China.
Max Planck Inst Chem Phys Solids, Germany.
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(English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed) Epub ahead of print
Abstract [en]

Conductivity, carrier mobility, and a suitable Gibbs free energy are important criteria that determine the performance of catalysts for a hydrogen evolution reaction (HER). However, it is a challenge to combine these factors into a single compound. Herein, we discover a superior electrocatalyst for a HER in the recently identified Dirac nodal arc semimetal PtSn4. The determined turnover frequency (TOF) for each active site of PtSn4 is 1.54 H-2 s(-1) at 100 mV. This sets a benchmark for HER catalysis on Pt-based noble metals and earth-abundant metal catalysts. We make use of the robust surface states of PtSn4 as their electrons can be transferred to the adsorbed hydrogen atoms in the catalytic process more efficiently. In addition, PtSn4 displays excellent chemical and electrochemical stabilities after long-term exposure in air and long-time HER stability tests.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH.
Keywords [en]
Dirac semimetal; electrocatalysis; hydrogen evolution reaction; PtSn4; surface states
National Category
Organic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-160046DOI: 10.1002/anie.201906109ISI: 000480700700001PubMedID: 31342613OAI: oai:DiVA.org:liu-160046DiVA, id: diva2:1349052
Note

Funding Agencies|European Research Council (ERC Advanced Grant) [291472]; ERC Advanced Grant [742068]

Available from: 2019-09-06 Created: 2019-09-06 Last updated: 2019-11-25

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