Evidence of surface migration and formation of catalytically “inactive” Pt in corrosion studies of Pt+ implanted Ti

Nuclear Instruments and Methods Pub Date : 1981-04-15 DOI:10.1016/0029-554X(81)90833-8

B.R. Appleton , E.J. Kelly , C.W. White , N.G. Thompson , B.D. Lichter

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引用次数: 18

Abstract

This investigation is part of an ongoing research project directed at applying the techniques of ion implantation doping and ion scattering analysis to identify the mechanisms associated with the anodic dissolution of TiPt alloys. The TiPt alloys produced by ion implantation were electrochemically examined in hydrogen-saturated 1N H₂SO₄ by both potentiostatic polarization and open-circuit potential methods. In this study, Ti samples implanted to relatively high doses (5.4 × 10¹⁵ −2.9 × 10¹⁶ atoms/cm²) were examined by ion scattering analysis at various stages in the electrochemical measurements. Quantitative measurements showed that the majority of the implanted Pt accumulated on the surface during anodic dissolution and underwent large scale surface migration. Evidence is also presented for the transition of the Pt on the surface from a catalytically “active” to “inactive” state. Possible mechanisms for the observed catalytically “inactive” Pt are discussed.

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在Pt+注入Ti的腐蚀研究中，表面迁移和催化“非活性”Pt形成的证据

本研究是一项正在进行的研究项目的一部分，该项目旨在应用离子注入掺杂和离子散射分析技术来确定与TiPt合金阳极溶解相关的机制。采用恒电位极化法和开路电位法对离子注入制备的TiPt合金在饱和氢1N H2SO4中进行了电化学检测。在电化学测量的不同阶段，采用离子散射分析对注入较高剂量(5.4 × 1015 ~ 2.9 × 1016原子/cm2)的Ti样品进行了检测。定量测量表明，植入的Pt大部分在阳极溶解过程中在表面积累，并进行了大规模的表面迁移。证据还提出了表面Pt从催化“活性”到“非活性”状态的转变。讨论了所观察到的催化“无活性”Pt的可能机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Nuclear Instruments and Methods

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