Abstract A stable palladium superhydrophobic surface (PdSHS) with static water contact angle of 161 ± 1° and sliding angle of 2° was fabricated on aluminum (Al) substrate through etching, deposition, and anneal process. The chemical composition, surface texture, and morphology were tested by X-ray diffraction pattern, X-ray photoelectron spectroscopy, scanning electron microscopy, along with energy dispersive spectroscopy. Pd nanoparticles were organized on micro and nanoscale on rough Al substrate. The electrochemical impedance spectroscopy was explored to test anti-corrosion behavior of PdSHS that is enhanced significantly than that of Al substrate. The environmental stability, durability and large size of PdSHS are also investigated with satisfactoried results. The photodegradation rate, chemical reaction constant and half-life of methylene blue are 98.31%, 5.89 × 10−2 s−1, and 5.27 min respectively when the PdSHS was as photocatalyst, which is much better than that of superhydrophilic sample. The photocatalytic degrading proficiency of PdSHS remains relatively stable even after 11 cycles. These can enhance industrial applications of the Pd nanoparticles on Al substrate and its alloys.

中文翻译：

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在铝基体上制备具有优异超疏水性和光催化活性的 Pd 纳米粒子

摘要 通过蚀刻、沉积和退火工艺在铝（Al）衬底上制备了稳定的钯超疏水表面（PdSHS），其静态水接触角为161±1°，滑动角为2°。通过 X 射线衍射图、X 射线光电子能谱、扫描电子显微镜和能量色散光谱测试化学成分、表面纹理和形态。Pd 纳米粒子在粗糙的铝基板上以微米和纳米级组织。电化学阻抗谱被用来测试 PdSHS 的抗腐蚀行为，该行为比铝基体显着增强。PdSHS 的环境稳定性、耐用性和大尺寸也得到了令人满意的结果。光降解率，当PdSHS作为光催化剂时，亚甲基蓝的化学反应常数和半衰期分别为98.31%、5.89×10−2 s−1和5.27 min，远优于超亲水样品。PdSHS 的光催化降解能力即使在 11 次循环后仍保持相对稳定。这些可以增强钯纳米粒子在铝基板及其合金上的工业应用。