cathode
/ˈkaθəʊd
/noun
1The negatively charged electrode by which electrons enter an electrical device. The opposite of anode.Oxygen enters at the cathode, where it combines with electrons and is split into ions that travel through the electrolyte to react with fuel at the anode....
- The opening focuses the electrons emitted from the cathode onto the anode to a spot size preferably less than 40 nanometers.
- An electron originating near the planar cathode and ultimately collected at electrode A will induce an equal charge at A and B during most of its journey.
1.1The positively charged electrode of an electrical device, such as a primary cell, that supplies current.Therefore, in electrolytic cells, the cathode is the negative terminal and the anode is the positive terminal....
- Most fuel cells use a polymer electrolyte membrane to separate the cathode and anode.
- The electrons on the anode migrate via a wire to the cathode, the other electrode in the fuel cell, where they are electrochemically assisted to combine with the protons and produce hydrogen gas.
Derivatives
cathodal
- In all experiments, the anodal and cathodal solutions were identical and comprised 10 mM Tris buffer at pH 6.3 or pH 8.5 together with additional electrolytes as described below.
- Stimulation parameters consisted of 0.5 ms trains of rectangular, cathodal pulses, 0.1 ms in duration, provided by a constant-current amplifier.
- Interestingly, one sample had increased polyclonal, cathodal IgG, probably of the IgG, subclass; the AMCVs for this sample were relatively high (and higher than those for most IgG MC).
cathodic
- Researchers determined the optimum potential for switching the photocurrent to be - 0. 05V, where the anodic and cathodic photocurrents are about the same.
- There are three broad classes of corrosion-inhibiting admixtures, using different chemical mechanisms to control oxidation and the resulting corrosion - anodic inhibitors, cathodic inhibitors, and organic inhibitors.
- Although the actual chemical reactions taking place within a battery are very complex, the major cathodic and anodic reactions can be idealized based on a knowledge of the parts of a battery and their electrochemical function.
Origin
Mid 19th century: from Greek kathodos 'way down', from kata- 'down'+ hodos 'way'.