In order to expand the range of high-quality nanosized semiconductor materials that can be obtained as quantum dots through a wet chemical route a series of oxidize-stable CdTe nanoclusters with narrow size distributions and extremely small particle sizes ranging from 1.3 to 2.4 nm has been prepared in aqueous solution using 2-mercaptoethanol and 1-thioglycerol as stabilizers. It has been investigated by means of UV-vis absorption and photoluminescence spectroscopy, X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and energy dispersive x-ray analysis (EDX).

Synthesis and characterization of thiol-stabilized CdTe nanocrystals

Gold is frequently regarded as the ideal metal for the investigation of solid electrode behaviour, which in aqueous media is often considered in very simplistic terms as being that of a metal which is highly resistant to dissolution. Gold possesses very weak chemisorbing properties and an extensive double layer region that in the presence of most pure electrolytes is often assumed to be totally free of Faradaic behaviour, and exhibits a monolayer (or Au2O3) oxide formation/removal reaction at quite positive potentials. However, recent investigations have revealed that the electrochemistry of polycrystalline gold in aqueous solution is considerably more complex. Two significantly different types of oxide deposits, monolayer (or α) and hydrous (or β), may be produced on the metal and the behaviour of the β-deposit is quite unusual. It is suggested that not only the behaviour of the β-oxide but, far more important from a practical viewpoint, the catalytic and electrocatalytic behaviour of gold (which will be discussed in more detail in Part II) may be rationalized in terms of the active state (or states) of gold. This active state (frequently present only at very low coverage) reacts in a manner that is quite different from that of stable gold. The nature of the active state of gold deserves far more attention than it has received to date.

https://link.springer.com/content/pdf/10.1007/BF03214756.pdf

The electrochemistry of gold: I the redox behaviour of the metal in aqueous media

Photoelectrochemical studies of passive films

Electrochemical study of gold electrodes with anodic oxide films—I. Formation and reduction behaviour of anodic oxides on gold

Gold is frequently regarded as the ideal metal for the investigation of solid electrode behaviour, which in aqueous media is often considered in very simplistic terms as being that of a metal which is highly resistant to dissolution. Gold possesses very weak chemisorbing properties and an extensive double layer region that in the presence of most pure electrolytes is often assumed to be totally free of Faradaic behaviour, and exhibits a monolayer (or AUZ03) oxide formation/removal reaction at quite positive potentials. However, recent investigations have revealed that the electrochemistry of polycrystalline gold in aqueous solution is considerably more complex. Two significantly different types of oxide deposits, monolayer (or a) and hydrous (or ~), may be produced on the metal and the behaviour of the ~-deposit is quite unusual. It is suggested that not only the behaviour of the ~-oxide but, far more important from a practical viewpoint, the catalytic and electrocatalytic behaviour of gold (which will be discussed in more detail in Part II)' may be rationalized in terms of the active state (or states) of gold. This active state (frequently present only at very low coverage) reacts in a manner that is quite different from that ofstable gold. The nature of the active state of gold deserves far more attention than it has received to date. The importance of surface reactions was highlighted in a recent article by Sachtler (l) who pointed our that ca 17% of GNP in the US and ca 25% in the case of Germany are derived from materials produced by catalytic processes. Most of these processes involve heterogeneous catalysis of gas phase reactions on metal or oxide surfaces. The catalysis of electrode reactions is also important, eg ca 13 million tons (valued at ca 2.2 billion dollars) of chlorine gas (2) is produced annually in the US, largely with the aid of electro catalytically active dimensionally stable (Ru02/Ti02)/Ti) anodes. The potential in the electro catalysis field is also quite significant; for example, the development of effective electrocatalysts for the direct methanol/air fuel cell would revolutionise the transport industry. Compared with the internal combustion engine, widely used at present, fuel cells in general offer the prospect of more efficient, cleaner and less noisy energy conversion. Methanol is a much more easily stored fuel than hydrogen for use in mobile energy conversion systems and may, with the development of

/pdf/the-electrochemistry-of-gold-i-the-redox-behaviour-of-the-1dhyyqvnns.pdf

The Electrochemistry of Gold: I The Redox Behaviour of the Metal in

Photoelectrochemical studies on gold electrodes with surface oxide layers: Part II. Discrimination between the surface photoprocess and photohole emission

Tadashi Watanabe

Papers

Photoelectrochemical studies on gold electrodes with surface oxide layers: Part II. Discrimination between the surface photoprocess and photohole emission

Photoelectrochemical studies on gold electrodes with surface oxide layers