NOVELTY - The electro-chemical apparatus has an electrically conductive diamond electrode (12) which has a front surface (4) which is in contact with a solution (6) and a rear surface (8) which has not contact with the solution. An electrical contact (10) is used to apply a voltage to the electrically conductive diamond electrode to perform an electrochemical process on the solution. A heater (12) is used for applying pulsed heating to rear surface, where front surface is heated by thermal conduction through electrically conductive diamond electrode.    USE - Electro-chemical apparatus for electro-deposition and stripping voltammetry in fuel cell applications.    ADVANTAGE - The heater is provided within the electrochemical sensor for heating the sensing electrode to increase deposition within the detection limits, so that very low concentrations of chemical species in solution can be detected easily. The use of diamond material for the sensing electrode can be heated and cooled very quickly. The electro-chemical apparatus is compact, robust and easy to use. The pulsed heating is not applied through the solution overlying the sensing surface and absorption within the solution leading to heating of the solution and generation of convection currents which can adversely affect electrochemical performance at the sensing surface is avoided. Diamond is hard, inert, and has a low thermal expansion coefficient in addition to its high thermal conductivity allowing aggressive pulse heating sequences to be applied while retaining dimensional, structural, and chemical stability. Electrically conductive diamond material is fabricated with an extremely wide potential window, a high degree of electrochemical reversibility, and with a low capacitance. The sensing surface of the diamond electrode is made highly smooth which aids in avoiding gas bubble formation. The pulsed heating of diamond electrodes improves sensing potentially which allows the use of lower quality diamond material in certain applications while achieving a sensing performance equivalent to a higher quality diamond material which save costs.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an electro-chemical method.    DESCRIPTION OF DRAWING(S) - The drawing shows the structural view of an electrochemical apparatus comprising an electrically conductive diamond electrode and a pulsed laser focused on a rear surface of the electrically conductive diamond electrode.    Electrically conductive diamond electrode (2)    Front surface (4)    Solution (6)    Rear surface (8)    Electrical contact (10)    Heater (12)