Promotion of MXene (Ti3C2Tx) as a robust electrocatalyst for oxygen evolution reaction via active sites of ZIF-67 - In situ mechanism investigations |
| |
| Affiliation: | 1. Department of Metallurgical and Materials Engineering, Nevsehir Haci Bektas Veli University, Nevsehir, 50300, Turkey;2. Department of Metallurgical and Materials Engineering, Eskisehir Osmangazi University, Eskisehir, 26040, Turkey;1. Institute of Refrigeration and Cryogenic Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. China Special Equipment Inspection and Research Institute, Beijing, 100029, China;3. College of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou, 730050, China;1. Xi''an Key Laboratory of Sustainable Energy Materials Chemistry, Department of Applied Chemistry, School of Chemistry, Xi''an Jiaotong University, Xi''an 710049, China;2. State Key Laboratory of Multiphase Flow in Power Engineering, Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;3. College of Eco-environmental Engineering, Qinghai University, Xi''ning 810016, China;1. FGBOU VO “South Russian State Polytechnic University (NPI) Named After M.I. Platov”, 346428, Rostov Region, Novocherkassk, Str. Enlightenment, 132, Russia;2. Don Technologies LLC, 164A, St. Mikhailovskaya, Novocherkassk, 346400, Russia;3. DonEnergoMash Innovation and Technology Center LLC, 344000, Rostov-on-Don, Suvorov St., 38a, Office 13, Russia;4. FGBUN “Federal Research Center Southern Scientific Center of the Russian Academy of Sciences” (UNC RAS), 344006, Rostov-on-Don, Pr. Chekhova, 41, Russia;1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, PR China;2. University of Chinese Academy of Sciences, Beijing, 100049, PR China |
| |
| Abstract: | Developing a robust and highly efficient electrocatalyst for the oxygen evolution reaction (OER) is required, due to its sluggish mechanism and high overpotential. Here, we present the Ti3C2Tx and ZIF-67 composites (MXene/ZIF-67) for an efficient OER. The MXene/ZIF-67_1:10 exhibits an overpotential of 366 mV, which is better than MXene (548 mV) and RuO2 (395 mV). Moreover, it shows improved electrochemical stability at 20 mA·cm? 2 with only a 0.2% increase in potential after 5 h, while RuO2 with an overpotential loss of 3.5%. After an increase in the current density of 10–20 mA cm?2 the potential increase by 7.4%, while in RuO2 by 25.3%. To reveal the observed performance, the composite's robustness and explain each component's role. Moreover, a detailed OER mechanism is discussed. It was realized via in situ Raman microscopy and XRD which allowed the revealing of the active species responsible for boosting OER. |
| |
| Keywords: | MXene ZIF-67 Electrocatalyst Oxygen evolution reaction |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
