This report investigated synthesis of porous Ti sheets by direct powder rolling followed by vacuum sintering at 1100°C for 1.5 h. Uniform microstructures were observed in the sections longitudinal and transverse to rolling direction in terms of porosity, pore size, gas permeability and filtration efficiency. IrO 2 nanowire arrays were coated onto the powder-rolled porous Ti substrate as an electrode by thermal decomposition. Characterisation results show that the coating mainly exhibited mixture of IrO 2 and α-Ti phases. The coating of IrO 2 nanowire arrays effectively increased the specific surface area of the IrO 2 /Ti electrode and reached over 95% of current efficiency. The cyclic voltammetry test of the electrode showed an obvious redox peak due to its increased specific surface area by the porous Ti substrate.