ArticleProceedings of the National Academy of Sciences of the United States of America2020
Nanoscale morphological evolution of monocrystalline Pt surfaces during cathodic corrosion.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 34 citations in OpenAlex.
- Electrochemical Fabrication of Nanoparticles and Single-Atom Catalysts via Cathodic Corrosion.Chemistry (Weinheim an der Bergstrasse, Germany) · 2025Review
- In vivo dynamics of indole- and phenol-derived plant hormones: Long-term, continuous, and minimally invasive phytohormone sensor.Science advances · 2025Article
- On the hidden transient interphase in metal anodes: Dynamic precipitation controls electrochemical interfaces in batteries.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Platinum hydride formation during cathodic corrosion in aqueous solutions.Nature materials · 2025Article
- Article
- Structural Evolution of Pt, Au and Cu Anodes by Electrolysis up to Contact Glow Discharge Electrolysis in Alkaline Electrolytes*.Chemphyschem : a European journal of chemical physics and physical chemistry · 2021Article
- Cathodic Corrosion of Metal Electrodes-How to Prevent It in Electroorganic Synthesis.Chemical reviews · 2021Article
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3 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
This paper studies the cathodic corrosion of a spherical single crystal of platinum in an aqueous alkaline electrolyte, to map out the detailed facet dependence of the corrosion structures forming during this still largely unexplored electrochemical phenomenon. We find that anisotropic corrosion of the platinum electrode takes place in different stages. Initially, corrosion etch pits are formed, which reflect the local symmetry of the surface: square pits on (100) facets, triangular pits on (111) facets, and rectangular pits on (110) facets. We hypothesize that these etch pits are formed through a ternary metal hydride corrosion intermediate. In contrast to anodic corrosion, the (111) facet corrodes the fastest, and the (110) facet corrodes the slowest. For cathodic corrosion on the (100) facet and on higher-index surfaces close to the (100) plane, the etch pit destabilizes in a second growth stage, by etching faster in the (111) direction, leading to arms in the etch pit, yielding a concave octagon-shaped pit. In a third growth stage, these arms develop side arms, leading to a structure that strongly resembles a self-similar diffusion-limited growth pattern, with strongly preferred growth directions.
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