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首页> 外文期刊>Electrocatalysis >The Effect of Rapid Thermal Annealing on Sputtered Pt and Pt3Pd2 Thin Film Electrocatalysts for Aqueous SO2 Electro-Oxidation
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The Effect of Rapid Thermal Annealing on Sputtered Pt and Pt3Pd2 Thin Film Electrocatalysts for Aqueous SO2 Electro-Oxidation

机译：快速热退火对溅射Pt和Pt3Pd2薄膜电催化剂氧化SO2水的影响

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摘要

Insight into the effect that rapid thermal annealing (RTA) has on the structural and electrochemical characteristics of sputtered Pt and Pt3Pd2 thin film electrocatalysts is communicated. The DC magnetron sputtered thin films were rapidly annealed at temperatures ranging from 600 to 900 degrees C under an Ar atmosphere. The microstructural changes and electrochemical properties (onset potential, current density and stability) induced by rapid thermal annealing were investigated towards the electro-oxidation of aqueous SO2. An increase in annealing temperature induced different degrees of crystallinity, and the surfaces changed from being smooth and granular to surfaces exhibiting defined grain boundaries. Electrochemical characterisation, employing linear polarisation (LP) and cyclic voltammetry (CV), revealed improved catalytic activity for the Pt3Pd2 thin film catalysts (compared to Pt) exhibiting lower onset potentials, competitive currents and acceptable stability. The Pt3Pd2 thin film, annealed at 800 degrees C, proved to be a promising contender in competing with pure Pt towards the electro-oxidation of aqueous SO2.
机译：交流了快速热退火（RTA）对溅射的Pt和Pt3Pd2薄膜电催化剂的结构和电化学特性的影响的见解。将直流磁控溅射的薄膜在Ar气氛下于600至900摄氏度的温度范围内快速退火。研究了快速热退火对SO 2水溶液的电氧化引起的微观结构变化和电化学性能（起始电势，电流密度和稳定性）。退火温度的升高引起不同程度的结晶度，并且表面从光滑和粒状变为具有确定的晶界的表面。电化学表征，采用线性极化（LP）和循环伏安法（CV），表明Pt3Pd2薄膜催化剂（与Pt相比）的催化活性得到了改善，表现出较低的起始电位，竞争电流和可接受的稳定性。在800摄氏度下退火的Pt3Pd2薄膜被证明是与纯Pt竞争SO2水溶液电氧化的有前途的竞争者。

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