Publication detail

Fluorinated MAX Phases for Photoelectrochemical Hydrogen Evolution

SANNA, M. NG, S. VAGHASIYA, J. PUMERA, M.

Original Title

Fluorinated MAX Phases for Photoelectrochemical Hydrogen Evolution

Type

journal article in Web of Science

Language

English

Original Abstract

Photoelectrochemical generation of hydrogen from water is considered to be the most appealing solution for the replacement of fossil fuels as a source of energy. For this reason, the study of novel and affordable materials with high energy conversion efficiencies is currently a crucial objective for the scientific community. Chemical modification of two-dimensional (2D) and layered materials, such as fluorination, can play a decisive role in tuning the properties for energy-related applications, as it was documented in the past by fluorination of graphite and graphene. MAX phases (MAX) are a class of layered ternary compounds that is well known for their interesting physical properties but still underexplored as a photoelectrocatalyst for energy conversion. Herein, a set of MAX, namely, Ta2AlC, Cr2AlC, Ti2AlC, and Ti3AlC2, was exposed to fluorine gas in a controlled environment and their photoelectrocatalytic properties were tested for the hydrogen evolution reaction with illumination by a visible light source of 660 nm wavelength. All of the mentioned compounds showed excellent hydrogen evolution performances under illumination, in particular after the fluorination process. Fluorinated Cr2AlC is the phase that showed the lowest overpotential, and fluorinated Ti2AlC and Ti3AlC2 showed the most prominent photoelectrocatalytic enhancement upon fluorination. The fluorinated MAX phases should find broad applications to photoelectrochemistry, as their fluorinated graphene counterparts did in the past.

Keywords

MAX phase; fluorination; 2D layered material; photoelectrochemistry; hydrogen generation; photoelectrocatalyst

Authors

SANNA, M.; NG, S.; VAGHASIYA, J.; PUMERA, M.

Released

28. 2. 2022

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

2168-0485

Periodical

ACS Sustainable Chemistry and Engineering

Year of study

10

Number

8

State

United States of America

Pages from

2793

Pages to

2801

Pages count

9

URL

https://pubs.acs.org/doi/10.1021/acssuschemeng.1c08133

BibTex

@article{BUT178672,
  author="Michela {Sanna} and Siow Woon {Ng} and Jayraj Vinubhai {Vaghasiya} and Martin {Pumera}",
  title="Fluorinated MAX Phases for Photoelectrochemical Hydrogen Evolution",
  journal="ACS Sustainable Chemistry and Engineering",
  year="2022",
  volume="10",
  number="8",
  pages="2793--2801",
  doi="10.1021/acssuschemeng.1c08133",
  issn="2168-0485",
  url="https://pubs.acs.org/doi/10.1021/acssuschemeng.1c08133"
}