Publication date: 22nd July 2026
The integration of wastewater treatment with hydrogen production offers a promising pathway to simultaneously address environmental pollution and clean energy generation [1]. This invited presentation highlights recent advances in the use of nanoscale nickel-based electrocatalysts (NiSe and NiS) for co-electrolysis of brewery and sewage wastewater streams [2] [3]. The developed catalysts exhibit high electrocatalytic activity toward hydrogen evolution and wastewater oxidation reactions, enabling efficient hydrogen generation while facilitating the removal of organic contaminants. Replacing the conventional oxygen evolution reaction with the oxidation of wastewater constituents significantly reduces the energy demand of the electrolysis process.
The presentation will discuss catalyst design strategies, structure–activity relationships, reaction mechanisms, and pollutant degradation pathways that govern the performance of wastewater-assisted electrolysis systems. Particular attention will be given to several critical questions: Can wastewater streams become economically viable feedstocks for green hydrogen production? How do wastewater compositions influence catalyst activity, selectivity, and long-term durability? What are the dominant oxidation pathways responsible for pollutant removal? Can wastewater-assisted electrolysis reduce operational costs and carbon emissions compared with conventional water electrolysis? Finally, what scientific, engineering, and techno-economic challenges must be overcome to scale these technologies from laboratory demonstrations to industrial deployment?
The talk will provide perspectives on how wastewater-to-hydrogen technologies can contribute to circular resource utilisation, sustainable water management, and the future hydrogen economy.
The author greatfully acknowledges financial support from the Heriot-Watt University EPSRC Impact Acceleration Account (IAA) Seedcorn Grant and Scottish Partnership in Energy and Engineering Research and Innovation (SPEERI) (PH011-H2).
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