Barua Sukomol, Balčiūnaitė Aldona, Vaičiūnienė Jūrate, Tamašauskaitė-Tamašiūnaitė Loreta, Norkus Eugenijus
Department of Catalysis, Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, Lithuania.
Materials (Basel). 2022 Nov 9;15(22):7901. doi: 10.3390/ma15227901.
In this study, NiMo catalysts that have different metal loadings in the range of ca. 28-106 µg cm were electrodeposited on the Ti substrate followed by their decoration with a very low amount of Au-crystallites in the range of ca. 1-5 µg cm using the galvanic displacement method. The catalytic performance for hydrogen evolution reaction (HER) was evaluated on the NiMo/Ti and Au(NiMo)/Ti catalysts in an alkaline medium. It was found that among the investigated NiMo/Ti and Au(NiMo)/Ti catalysts, the Au(NiMo)/Ti-3 catalyst with the Au loading of 5.2 µg cm gives the lowest overpotential of 252 mV for the HER to reach a current density of 10 mA·cm. The current densities for HER increase ca. 1.1-2.7 and ca. 1.1-2.2 times on the NiMo/Ti and Au(NiMo)/Ti catalysts, respectively, at -0.424 V, with an increase in temperature from 25 °C to 75 °C.
在本研究中，将金属负载量在约28 - 106 µg/cm范围内的NiMo催化剂电沉积在Ti基底上，然后使用电流置换法用极少量（约1 - 5 µg/cm范围内）的Au微晶对其进行修饰。在碱性介质中评估了NiMo/Ti和Au(NiMo)/Ti催化剂对析氢反应（HER）的催化性能。结果发现，在所研究的NiMo/Ti和Au(NiMo)/Ti催化剂中，Au负载量为5.2 µg/cm的Au(NiMo)/Ti - 3催化剂在HER达到10 mA·cm的电流密度时具有最低的过电位，为252 mV。在 - 0.424 V下，随着温度从25℃升高到75℃，NiMo/Ti和Au(NiMo)/Ti催化剂上HER的电流密度分别增加约1.1 - 2.7倍和约1.1 - 2.2倍。
