Layered MAX phase electrocatalyst activity is driven by only a few hot spots

Katarina A. Novčić, Christian Iffelsberger, Martin Pumera

Research output: Contribution to journalArticlepeer-review

Abstract

Layered metal carbides, MAX phases, have gained significant interest in the scientific community due to their electrocatalytic and electrochemical properties. Among various MAX phases, Mo2TiAlC2 has driven much attention because of its enhanced electrochemical activity for the hydrogen evolution reaction (HER). So far, the macroscopic HER performance has been investigated by traditional electrochemical techniques such as voltammetry. However, the knowledge of the microscopic electrocatalytic behaviour, i.e., distribution and location of highly active sites for HER is still limited. Herein, the microscopic analysis of the MAX phase microparticles shows that their electrocatalysis is driven by a few particles with an outstanding catalytic activity towards hydrogen evolution. Such observation is of high importance for design and applications of electrocatalysts in general. This journal is

Original languageEnglish
Pages (from-to)3206-3215
Number of pages10
JournalJournal of Materials Chemistry A
Volume10
Issue number6
DOIs
Publication statusPublished - 2022 Feb 14

Bibliographical note

Funding Information:
M. P. acknowledges the nancial support by the Grant Agency of the Czech Republic (GACR EXPRO: 19-26896X). CzechNanoLab project LM2018110 funded by MEYS CR is gratefully acknowledged for the nancial support of the measurements at CEITEC Nano Research Infrastructure. This project has received funding from the grant CEITEC-K-21-7063, realized within the project Quality Internal Grants of BUT (KInG BUT), Reg. No. CZ.02.2.69/0.0/0.0 19_073/0016948, which is nanced from the OP RDE (Operational Program Research, Development and Education) and from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement no. 888797.

Funding Information:
M. P. acknowledge the nancial support from the Grant Agency of Czech Republic (GACR EXPO: 19-26896X). K. A. N. acknowledges the grant CEITEC-K-21-7063, realized within the project Quality Internal Grants of BUT (KInG BUT), Reg. No. CZ.02.2.69/ 0.0/0.019_073/0016948, which is nanced from the OP RDE (Operational Program Research, Development and Education). C. I. acknowledges the nancial support by the European Union's Horizon 2020 Research and Innovation Program under the Marie Skłodowska-Curie grant agreement no. 888797. K. A. N. and C. I. acknowledge the support from the CzechNano-Lab Research Infrastructure (ID LM2018110, MEYS CR) for providing the sample characterization facilities. The authors thank Dr Pavla Roupcováfrom Central European Institute of Technology, Brno University of Technology, for providing XRD analysis of the sample.

Publisher Copyright:
© The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Layered MAX phase electrocatalyst activity is driven by only a few hot spots'. Together they form a unique fingerprint.

Cite this