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首页> 外文期刊>Electrocatalysis >Co-sputtered PtxPdyAlz thin film electrocatalysts for the production of hydrogen via SO2(aq) electro-oxidation
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Co-sputtered PtxPdyAlz thin film electrocatalysts for the production of hydrogen via SO2(aq) electro-oxidation

机译：共溅射PtxPdyAlz薄膜电催化剂，用于通过SO2（aq）电氧化生产氢气

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摘要

A co-sputtered PtxPdyAlz ternary system was investigated for potential use as anode catalyst for the electro-oxidation of aqueous sulphur dioxide (SO2), a key reaction in the hybrid sulphur (HyS) process for splitting water into hydrogen and oxygen. Combining the noble metals Pt and Pd with Al resulted in no significant improvement in onset potential; however, current output was improved for the majority of the electrocatalysts evaluated. Of these electrocatalysts, only a single ternary composition exhibited improved stability when compared to pure Pt. It was found that a combination of Pt40Pd57Al3 (annealed at 900 A degrees C) exhibited superior performance when compared to pure Pt and the previously determined best binary electrocatalyst, i.e. Pt3Pd2. Current density (mA.mg Pt-1) increased from 108.11 to 181.21 and finally to 396.73 for Pt, Pt3Pd2 and Pt40Pd57Al3, respectively, indicating an increase in activity that correlates with a decrease in Pt content. Atomic force microscopy (AFM) revealed an increase in surface roughness for Pt, Pt3Pd2 and Pt40Pd57Al3, while the occurrence of metal interaction and certain degrees of Al migration (a result of annealing) was confirmed for Pt40Pd57Al3 by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction analysis (XRD).
机译：研究了一种共溅射的PtxPdyAlz三元体系，可潜在地用作二氧化硫水溶液（SO2）电氧化的阳极催化剂，这是杂化硫（HyS）工艺中将水分解为氢和氧的关键反应。贵金属Pt和Pd与Al的结合不会使起始电位显着提高。然而，对于大多数评估的电催化剂，电流输出得到了改善。在这些电催化剂中，与纯Pt相比，只有一种三元组合物表现出改善的稳定性。发现与纯Pt和先前确定的最佳二元电催化剂，即Pt3Pd2相比，Pt40Pd57Al3（在900℃下退火）的组合表现出优异的性能。 Pt，Pt3Pd2和Pt40Pd57Al3的电流密度（mA.mg Pt-1）从108.11增加到181.21，最后增加到396.73，表明活性增加与Pt含量降低相关。原子力显微镜（AFM）显示Pt，Pt3Pd2和Pt40Pd57Al3的表面粗糙度增加，而X射线光电子能谱（XPS）证实了Pt40Pd57Al3发生了金属相互作用和一定程度的Al迁移（退火的结果）。和X射线衍射分析（XRD）。

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