16-ISABC · Ioannina 2023

Cobalt Porphyrins for CO2 Reduction: From Ioannina to Australia

At the 16th International Symposium on Applied Bioinorganic Chemistry, held in Ioannina, Greece, in June 2023, researchers examined how molecular catalysts can electrochemically convert CO2 into useful carbon products. Organized by the University of Ioannina, the meeting connected applied bioinorganic chemistry with materials design and industrial electrocatalysis. Cobalt porphyrins offered a particularly rich platform because their metal centre, ligand environment and surface attachment can all be tuned.

For Australian audiences, the work has direct relevance as coal and gas continue to shape the national electricity mix while renewable generation expands. CO2 electroreduction could help produce fuels and chemicals with lower emissions, yet its value depends on selective, durable catalysts operating at practical current densities. The symposium therefore provided a useful bridge between molecular-level control and the requirements of real electrolysis systems.

Why Cobalt Porphyrins Matter

Cobalt porphyrins place a single metal atom within a conjugated macrocycle, creating a well-defined active site that can bind and activate CO2. Changes in cobalt’s oxidation state, axial ligands and surrounding substituents alter the energetics of proton- and electron-transfer steps. This control influences whether carbon dioxide is reduced primarily to carbon monoxide, formate or another product.

The porphyrin framework also makes it possible to connect molecular chemistry with electrode engineering. Immobilized catalysts can generate carbon monoxide close to a gas diffusion layer, while soluble catalysts may offer different pathways toward formate. Relevant research questions include catalyst loading, local pH, water transport, product selectivity and resistance to decomposition during extended operation.

These issues are especially significant for laboratories in Sydney and Melbourne, where electrochemistry and materials teams are investigating systems that could support Australian decarbonisation. A catalyst that performs well only at low current density or over a few hours offers limited industrial value. Demonstrations in membrane-electrode assemblies and flow cells are needed to show that molecular precision can survive realistic operating conditions.

The Ioannina Symposium in Focus

The formal record of the meeting is available through the official symposium website, which brings together the welcome, participation arrangements and scientific programme. Its coverage of young scientist travel awards, poster prizes, scholarships and application requirements reflects the symposium’s role in supporting both established researchers and early-career participants.

Zita Congress & Event Management served as the official symposium secretariat for registration, accommodation and abstract-related inquiries. This arrangement gave delegates a clear route for administrative questions while allowing the scientific programme to remain centred on shared research priorities. The combination of travel support and poster recognition also created practical opportunities for international collaboration.

Australian delegates had to plan for Greek summer travel conditions in a season that is winter in Australia, with flights to Ioannina commonly connecting through Athens. Local transport, entry documentation and the time difference with Australian capitals also required attention. For visitors extending a Greek trip beyond Ioannina, Crete2Cape travel resources provide additional regional itinerary context.

Moving from Molecules to Electrolyzers

Laboratory studies often examine a cobalt porphyrin as a dissolved catalyst or as a thin film on a simplified carbon electrode. Industrial development requires several additional steps: immobilization without blocking active sites, management of CO2 and electrolyte transport, scale-up of electrode area and operation in a compact flow electrolyzer. Comparisons should therefore include both intrinsic catalyst behaviour and full-cell performance.

Australian markets already provide relevant application scenarios. Mining and mineral-export operations in the Pilbara are examining pathways for green hydrogen, ammonia and other low-carbon commodities, while captured CO2 could eventually support fuels or chemical production. Using CO2 in these value chains would require reliable conversion systems, but also an honest assessment of energy demand, infrastructure needs and life-cycle emissions.

Researchers shipping catalysts, cells or specialist equipment also encounter Australian Customs requirements for temporary exports and commercial goods. Scientific teams should check Border Force declarations, safety data sheets and dangerous-goods rules for electrolytes or solvents before laboratory materials leave the country. Biological components or contaminated laboratory waste may attract separate biosecurity conditions, making early planning essential.

A Practical Evaluation Framework

A credible assessment should separate molecular performance from device-level productivity. Results should be reported under clearly defined conditions so that comparisons remain meaningful across different electrodes, electrolytes and laboratories.

Laboratory evidence to collect:

The same framework must extend towards application. A catalyst with excellent selectivity may still produce an uneconomic electrolyzer if the cell voltage, membrane losses or catalyst replacement costs are excessive. Researchers should therefore document the entire system and use realistic Australian electricity scenarios.

Scale-up evidence to collect:

Researchers preparing a literature review can consult the linked site science insights page alongside the symposium programme when tracing the themes raised in Ioannina. For Australian projects, collaboration with the country’s critical-minerals strategy and emerging hydrogen industry could improve both supply-chain analysis and access to pilot facilities.

From Symposium Findings to Australian Collaboration

The symposium’s international character creates a strong foundation for Australian participation in European electrocatalysis networks. Partnerships could combine Greek expertise in molecular design with Australian facilities for membrane testing, industrial modelling and mineral-sector applications. Shared reference materials and common reporting protocols would make comparisons more reliable and accelerate the identification of scalable catalysts.

Priority projects could focus on CO2 conversion in renewable hydrogen regions, the production of formate or carbon monoxide for chemical synthesis, and porous electrodes that operate efficiently at elevated current density. Australian teams could also coordinate stability studies across multiple sites, helping distinguish genuine catalyst durability from degradation caused by a single cell design.

Use the symposium record to identify its award, scholarship and poster-prize model for future events, and contact Zita Congress & Event Management through the secretariat channels described on the site. Australian researchers and industry partners can now turn the Ioannina discussions into a concrete programme of catalyst benchmarking, pilot testing and long-term collaboration.