English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The electrodeposltlon of fi-Pb02 from HCIÔ solutions of Pb(II) at a Au rotated disc electrode (RDE) was studied as a function of applied potential, rotational velocity, and the concentrations of HCIÔ and Pb(II). A long induction period (i.e., i ~ 0) is associated with high acidity, low concentration of Pb(II), and high rotational velocity. Following the induction period, the current rises to a steady-state value which is significantly lower than the mass transport-limited value for Pb(II). The steady-state value of electrode current decreases as rotational velocity is increased, contrary to expectations for a mass transport-controlled process at a RDE. The generation of a soluble intermediate species is proposed to account for these observations. Repeated cycles of deposition and stripping of Pb02 at the Au RDE results in a decreasing induction period for subsequent Pb02 deposition. This is concluded to result because an ultra-thin Pb(II) film (possibly PbO) is formed which is stabilized by interaction with the Au substrate and is not dissolved following the negative potential scan to 0.3 V. The original state of the clean Au surface is regenerated by cathodic H2(g) evolution, chemical stripping with H2O2 or KMnÔ , or by mechanical abrasion.

Selective electrocatalysis of anodic oxygen-transfer reactions at chemically modified, thin-film lead dioxide electrodes