Bifunctional CuS/Cl-terminated greener MXene electrocatalyst for efficient hydrogen production by water splitting

Bilal Sarfraz, Muhammad Taqi Mehran, Faisal Shahzad, Sajjad Hussain, Salman Raza Naqvi, Hassnain Abbas Khan, Khalid Mahmood

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Metal sulfides and 2D materials are the propitious candidates for numerous electrochemical applications, due to their superior conductivity and ample active sites. Herein, CuS nanoparticles were fabricated on 2D greener HF-free Cl-terminated MXene (Ti3C2Cl2) sheets by the hydrothermal process as a proficient electrocatalyst for the hydrogen evolution reaction (HER) and overall water splitting. CuS/Ti3C2Cl2 showed an overpotential of 163 mV and a Tafel slope of 77 mV dec−1 at 10 mA cm−2 for the HER. In the case of the OER, CuS/Ti3C2Cl2 exhibited an overpotential of 334 mV at 50 mA cm−2 and a Tafel slope of 42 mV dec−1. Moreover, the assembled CuS/Ti3C2Cl2||CuS/Ti3C2Cl2 electrolyzer delivered current density of 20 mA cm−2 at 1.87 V for overall water splitting. The CuS/Ti3C2Cl2 electrocatalyst showed excellent stability to retain 96% of its initial value for about 48 hours at 100 mA cm−2 current density. The synthesis of CuS/Ti3C2Cl2 enriches the applications of MXene/metal sulfides in efficient bifunctional electrocatalysis for alkaline water splitting.
Original languageEnglish (US)
Pages (from-to)22017-22028
Number of pages12
JournalRSC ADVANCES
Volume13
Issue number32
DOIs
StatePublished - Jun 21 2023

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Chemistry

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