Critical Nucleus Size and Activation Energy of Ag Nucleation by Electrochemical Observation of Isolated Nucleation Events.

The induction times for electrodeposition of individual Ag nanoparticles on Pt nanodisk electrodes in acetonitrile were used to determine the critical nucleus size and activation energy barrier associated with the formation of Ag nuclei. Induction times for the nucleation and growth of a single Ag nanoparticle were determined following the application of a potential step to reduce Ag at overpotentials, η, ranging from -130 to -70 mV. Sufficiently small Pt electrodes (5.

Electroprecipitation of Nanometer-Thick Films of Ln(OH) [Ln = La, Ce, and Lu] at Pt Microelectrodes and Their Effect on Electron-Transfer Reactions.

We report investigations of the deposition of nanometer-thick Ln(OH) films (Ln = La, Ce, and Lu) and their effect on outer-sphere and inner-sphere electron-transfer reactions. Insoluble Ln(OH) films are deposited from aqueous solutions of LaCl onto the surface of 12.5 μm radius Pt microdisk electrodes during water or oxygen reduction.

Integrated Photobioelectrochemical Systems: A Paradigm Shift in Artificial Photosynthesis.

Recent breakthroughs have reinvigorated the century-old research domain of artificial photosynthesis. Here, we highlight CO-reducing and O-liberating integrated photobioelectrochemical systems that contain novel enzymatic cathodes and photoanodes. These devices, which are completely self-driven by solar energy with unprecedented efficiency and stability, have important implications for biotechnological research communities.