Park Hae Jin, Kim Tae Kyung, Eckert Jürgen, Hong Sung Hwan, Kim Ki Buem
Department of Nanotechnology and Advanced Materials Engineering, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea.
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, 8700 Leoben, Austria.
Materials (Basel). 2025 Aug 31;18(17):4082. doi: 10.3390/ma18174082.
This study investigates the optimal duration for forming a uniform oxide layer and evaluates its influence on water-splitting performance. We selected a TiCuNiSn amorphous ribbon, which is known to simultaneously form anatase TiO and Sn oxide via a single hydrothermal process. Hydrothermal treatments were conducted at 220 °C in 150 mL of distilled water for durations of 3 and 6 h. The process successfully formed nanoscale metal oxides on the alloy surface, with the uniformity of the oxide layer increasing over time. The amorphous phase of the alloy was retained under all conditions. X-ray photoelectron spectroscopy (XPS) analysis confirmed the formation of TiO and SnO, while Cu and Ni remained in their metallic state. Furthermore, we verified the coexistence of these oxides with metallic Ti and Sn. Photoelectrochemical analysis showed that the sample treated for 6 h exhibited the best water-splitting performance, which correlated directly with the most uniform oxide coverage. This time-controlled hydrothermal oxidation method, using only water, presents a promising and efficient approach for developing functional surfaces for electronic and photoelectrochemical applications of metallic glasses (MGs).
本研究探究了形成均匀氧化层的最佳时长，并评估其对水分解性能的影响。我们选择了一种TiCuNiSn非晶带材，已知其可通过单一水热过程同时形成锐钛矿型TiO和Sn氧化物。水热处理在220℃的150 mL蒸馏水中进行，时长分别为3小时和6小时。该过程成功在合金表面形成了纳米级金属氧化物，氧化层的均匀性随时间增加。合金的非晶相在所有条件下均得以保留。X射线光电子能谱（XPS）分析证实了TiO和SnO的形成，而Cu和Ni仍处于金属态。此外，我们验证了这些氧化物与金属Ti和Sn的共存。光电化学分析表明，处理6小时的样品表现出最佳的水分解性能，这与最均匀的氧化物覆盖直接相关。这种仅用水的时间控制水热氧化方法，为开发用于金属玻璃（MGs）电子和光电化学应用的功能表面提供了一种有前景且高效的方法。
