Sarfraz Bilal, Mehran Muhammad Taqi, Shahzad Faisal, Hussain Sajjad, Naqvi Salman Raza, Khan Hassnain Abbas, Mahmood Khalid
School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST) H-12 Campus Islamabad 44000 Pakistan
Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences (PIEAS) Islamabad 45650 Pakistan.
RSC Adv. 2023 Jul 21;13(32):22017-22028. doi: 10.1039/d3ra02581k. eCollection 2023 Jul 19.
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 (TiCCl) sheets by the hydrothermal process as a proficient electrocatalyst for the hydrogen evolution reaction (HER) and overall water splitting. CuS/TiCCl showed an overpotential of 163 mV and a Tafel slope of 77 mV dec at 10 mA cm for the HER. In the case of the OER, CuS/TiCCl exhibited an overpotential of 334 mV at 50 mA cm and a Tafel slope of 42 mV dec. Moreover, the assembled CuS/TiCCl||CuS/TiCCl electrolyzer delivered current density of 20 mA cm at 1.87 V for overall water splitting. The CuS/TiCCl electrocatalyst showed excellent stability to retain 96% of its initial value for about 48 hours at 100 mA cm current density. The synthesis of CuS/TiCCl enriches the applications of MXene/metal sulfides in efficient bifunctional electrocatalysis for alkaline water splitting.
金属硫化物和二维材料因其卓越的导电性和丰富的活性位点，是众多电化学应用的理想候选材料。在此，通过水热法在二维无氟氯端基MXene（TiCCl）片上制备了硫化铜纳米颗粒，作为析氢反应（HER）和全水分解的高效电催化剂。对于HER，CuS/TiCCl在10 mA cm时的过电位为163 mV，塔菲尔斜率为77 mV dec。在OER的情况下，CuS/TiCCl在50 mA cm时的过电位为334 mV，塔菲尔斜率为42 mV dec。此外，组装的CuS/TiCCl||CuS/TiCCl电解槽在1.87 V下全水分解的电流密度为20 mA cm。CuS/TiCCl电催化剂表现出优异的稳定性，在100 mA cm电流密度下约48小时内保持其初始值的96%。CuS/TiCCl的合成丰富了MXene/金属硫化物在碱性水分解高效双功能电催化中的应用。
