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titanium electrode is a highly durable and light-weight electrode that is used in many applications in the chemical industry. It is a versatile electrode material that can be produced in a variety of shapes including mesh, plate, rod, and wire. This versatility makes titanium an excellent choice for chemical applications that require a large surface area or frequent cleaning and disinfection.

Titania is also well-suited for applications that require high current densities, as it has a relatively low conductivity when compared to copper. This is important for processes that require high-current density electrodes, such as electroplating and electrochemical synthesis. In order to maximise the performance of titanium electrodes, it is essential that they have good corrosion resistance and mechanical strength.

To achieve these properties, titanium is often plated with other metals to improve the durability of the electrode. This is done in a process called galvanisation. In this process, a metal such as platinum is deposited on the titanium to increase its conductivity. This is achieved by melting the noble metal on the titanium surface to form a solid. The resulting material is known as a platinum coated titanium bielectrode.

The authors of this article demonstrate that, for the first time, [Ru(bpy)3]2+ can be oxidised and reduced using a 3D titanium electrode array formed through sintered laser melting. Unlike conventional gold or platinum electrodes, the ability to create both radical cations and anions at the same time opens up the possibility of generating ECL via an annihilation mechanism in aqueous solutions without the need for a co-reactant. Figure 4 shows transient current (black line) and ECL (red line) responses for the 3D titanium array coated with a native oxide following potential steps from 0.000 to -1.600 V (Ru2+ reduction, thick black line) and then to +1.200 V (Ru2+ oxidation, thin black line).