Imperial College London


Faculty of EngineeringDepartment of Chemical Engineering

Professor of Electrochemical Engineering



+44 (0)20 7594 5633g.kelsall Website




Mrs Sarah Payne +44 (0)20 7594 5567




401CRoderic Hill BuildingSouth Kensington Campus






Date Role
2001- Professor of Electrochemical Engineering, Department of Chemical Engineering, Imperial College London.
2000-2001 Professor of Electrochemical Engineering, T.H.Huxley School, Imperial College London
1998-2000 NSERC Industrial Research Chair in Electrometallurgy, University of British Columbia, Vancouver, Canada.
1994-1998 Professor of Electrochemical Engineering, Department of Earth Resources Engineering, Imperial College London
1979-1994 Lecturer, then Reader in Electrochemical Engineering, Department of Earth Resources Engineering, Imperial College London.
1974-1978 Research Officer, Electricity Council Research Centre, Capenhurst, Chester.
1972-1974 Ph.D. in Electrochemical Engineering, University of Southampton, (Thesis: Fluidised Bed Electrodes)
1971-1972 M.Sc. Corrosion, Department of Chemical Engineering, University of Manchester
1968-1971 B.Sc. Chemistry, University of Manchester

Research Interests

My research involves the conception, design, characterisation, modelling, and optimisation of electrochemical processes, consuming electrical energy to effect useful chemical change. Such processes are used for industrial production of Cl2 + NaOH, NaClO3, NaClO4, Al, Co, Cu, Mg, Mn, Na, Ni, Zn, adiponitrile, etc. Chlor-alkali electrolyses alone consume ca. 2 % of the total US electrical power output and one plant at Runcorn consumes ca. 1 % of UK electrical power. Hence, the energy efficiencies of such processes are economically and environmentally crucial, since energy costs dominate their overall running costs, and, though they are intrinsically clean in themselves, they cause pollution (CO2, SO2, NOx) at a distance if energised by power stations burning fossil fuels. Recently completed and present projects involve(d):

  • Modelling of spatial distributions of electric potentials, current densities / local reaction rates and concentrations in electrochemical reactors, for industrially relevant conditions.
  • Modelling of electrode kinetics, current efficiencies (i.e. the proportion of total current used in the required reaction) and specific electrical energy consumptions for electrochemical processes involving multiple electrode reactions. This enables improved understanding, possibly resulting in improved performance, of existing industrial processes, and in the longer term, could lead to improved reactor designs.
  • Conception, design, characterisation, modelling, and optimisation of novel processes for treatment of effluents and wastes (electronic scrap, catalysts etc.) containing a range of precious and base metals.
  • Measurements of the spatial distributions of bubbles in electrochemical reactors and of the coalescence kinetics of individual bubbles with planar electrolyte / gas interfaces. Most of the most industrially important electrolytic processes generate bubbles of chlorine or oxygen, and hydrogen, which accumulate with height, decreasing electrolyte conductivities, increasing specific electrical energy consumptions and distorting current density distributions.




Kelsall GH, Hankin A, Electrodeposition of nickel from sulfamate effluents, Ecs Transactions, ISSN:1938-6737

Bystron T, Horbenko A, Syslova K, et al., 2018, 2-Iodoxybenzoic Acid Synthesis by Oxidation of 2-Iodobenzoic Acid at a Boron-Doped Diamond Anode, Chemelectrochem

Bedoya-Lora FE, Hankin A, Kelsall GH, 2017, En route to a unified model for photo-electrochemical reactor optimisation. I - Photocurrent and H-2 yield predictions, Journal of Materials Chemistry A, Vol:5, ISSN:2050-7488, Pages:22683-22696

Bedoya-Lora FE, Hankin A, Holmes-Gentle I, et al., 2017, Effects of low temperature annealing on the photo-electrochemical performance of tin-doped hematite photo-anodes, Electrochimica Acta, Vol:251, ISSN:0013-4686, Pages:1-11

Hankin A, Bedoya-Lora FE, Ong CK, et al., 2017, From millimetres to metres: the critical role of current density distributions in photo-electrochemical reactor design, Energy & Environmental Science, Vol:10, ISSN:1754-5692, Pages:346-360

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