Experimental and theoretical insights to demonstrate the hydrogen evolution activity of layered platinum dichalcogenides electrocatalysts

Journal of Materials Research and Technology

Kamran Akbar¹  Dhanasekaran Vikraman²  Wooseok Song³  Jongwan Jung⁴  Seung-Hyun Chun⁵  Iqra Rabani⁵  Sajjad Hussain⁶  Ki-Seok An⁷  Hyun-Seok Kim⁷ 

[1] Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea;Department of Molecular Sciences and Nanosystems, Ca’ Foscari Unversity of Venice, Via Torino 155, 30172, Venezia Mestre, Italy;Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea;Department of Physics, Sejong University, Seoul 05006, Republic of Korea;Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea;Hybrid Materials Center (HMC), Sejong University, Seoul 05006, Republic of Korea;Thin Film Materials Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea;

关键词: PtX2;    Hydrogen evolution;    DFT;    Water splitting;    TEM;   

DOI  :  

来源: DOAJ

【 摘 要 】

Hydrogen is a highly efficient and clean renewable energy source and water splitting through electrocatalytic hydrogen evolution is a most promising approach for hydrogen generation. Layered transition metal dichalcogenides-based nano-structures have recently attracted significant interest as robust and durable catalysts for hydrogen evolution. We systematically investigated the platinum (Pt) based dichalcogenides (PtS2, PtSe2 and PtTe2) as highly energetic and robust hydrogen evolution electrocatalysts. PtTe2 catalyst unveiled the rapid hydrogen evolution process with the low overpotentials of 75 and 92 mV (vs. RHE) at a current density of 10 mA cm−2, and the small Tafel slopes of 64 and 59 mV/dec in acidic and alkaline medium, respectively. The fabricated PtTe2 electrocatalyst explored a better catalytic activity than PtS2 and PtSe2. The density functional theory estimations explored that the observed small Gibbs free energy for H-adsorption of PtTe2 was given the prominent role to achieve the superior electrocatalytic and excellent stability activity towards hydrogen evolution due to a smaller bandgap and the metallic nature. We believe that this work will offer a key path to use Pt based dichalcogenides for hydrogen evolution electrocatalysts.

【 授权许可】

Unknown