Cost and performance analysis of transition metal phosphides for PEM electrolyzers

Öz

This study evaluates the economic and technical viability of using transition metal phosphides (TMPs), specifically FeP/CB and CoP/CB, as platinum-free catalysts in proton exchange membrane (PEM) electrolyzers. A 100 kW system was modeled to compare efficiency, durability, capital cost, and the levelized cost of hydrogen (LCOH) with traditional Pt-based benchmarks. The analysis shows that while TMP-based systems may need a slightly larger surface area because of lower efficiencies, both FeP/CB and CoP/CB achieve LCOH values similar to those of Pt-based systems. For an electricity price of $0.05 kWh⁻¹, the calculated LCOH values range from approximately $3.6–$4.0 kg⁻¹ H₂, corresponding to system efficiencies of 67.5 % (FeP/CB) and 65.1 % (CoP/CB). Of the two, FeP/CB shows better performance with higher efficiency and a longer projected lifetime. CoP/CB also shows comparably competitive performance. These findings indicate that TMP catalysts can help reduce reliance on rare and expensive platinum group metals while ensuring cost-effective hydrogen production, thus supporting the growth of green hydrogen technologies.

Anahtar Kelimeler

• Transition metal phosphides
• PEM electrolyzers
• Techno-economic analysis
• Pt-free catalysts
• Levelized cost of hydrogen

Kaynakça

1. [1] International Energy Agency (IEA). World Energy Outlook 2024. IEA; 2024.
2. [2] Demirkesen S, Variyenli Hİ. The model of free investment and centralized management in renewable energy production projects. International Journal of Energy Studies 2021;1:1–18.
3. [3] Krichen M, Basheer Y, Qaisar SM, Waqar A. A survey on energy storage: Techniques and challenges. Energies 2023;16:2271.
4. [4] Adeyinka AM, Esan OC, Ijaola AO, Farayibi PK. Advancements in hybrid energy storage systems for enhancing renewable energy-to-grid integration. Sustainable Energy Research 2024;11.
5. [5] Osman AI, Mehta N, Elgarahy AM, Hefny M, Al-Hinai A, Al-Muhtaseb AH, et al. Hydrogen production, storage, utilisation and environmental impacts: a review. Environmental Chemistry Letters 2021;20:153–88.
6. [6] Kumar SS, Lim H. Recent advances in hydrogen production through proton exchange membrane water electrolysis – a review. Sustainable Energy and Fuels 2023;7:3560–83.
7. [7] Bin S, Chen Z, Zhu Y, Zhang Y, Xia Y, Gong S, et al. High-pressure proton exchange membrane water electrolysis: Current status and challenges in hydrogen production. International Journal of Hydrogen Energy 2024;67:390–405.
8. [8] Greitzer M. Iridium and platinum availability for electrolyser production up to 2030. Green Energy and Technology 2025;Part F3771:257–79.

9. [9] Zhang S, He X, Ding Y, Shi Z, Wu B. Supply and demand of platinum group metals and strategies for sustainable management. Renewable and Sustainable Energy Reviews 2024;204:114821.
10. [10] Wang S, Lu A, Zhong CJ. Hydrogen production from water electrolysis: Role of catalysts. Nano Convergence 2021;8:4.
11. [11] Liu D, Xu G, Yang H, Wang H, Xia BY. Rational design of transition metal phosphide-based electrocatalysts for hydrogen evolution. Advanced Functional Materials 2023;33:2208358.
12. [12] Brito J, Restivo J, Sousa JPS, Spera NCM, Falcão DS, Rocha A, et al. Implementation of transition metal phosphides as Pt-free catalysts for PEM water electrolysis. Energies 2022;15:1821.
13. [13] Inocêncio CVM, de Souza PM, Rabelo-Neto RC, da Silva VT, Noronha FB. A systematic study of the synthesis of transition metal phosphides and their activity for hydrodeoxygenation of phenol. Catalysis Today 2021;381:133–42.
14. [14] Yu H, Qi L, Hu Y, Qu Y, Yan P, Isimjan TT, et al. Nanowire-structured FeP-CoP arrays as highly active and stable bifunctional electrocatalyst synergistically promoting high-current overall water splitting. Journal of Colloid and Interface Science 2021;600:811–9.
15. [15] Lee H, Lee B, Byun M, Lim H. Economic and environmental analysis for PEM water electrolysis based on replacement moment and renewable electricity resources. Energy Conversion and Management 2020;224:113477.
16. [16] Badgett A, Brauch J, Thatte A, Rubin R, Skangos C, Wang X, et al. Updated manufactured cost analysis for proton exchange membrane water electrolyzers. NREL; 2024.
17. [17] Sarialtin H. Techno-economic analysis of MoS₂/carbon composites as sustainable platinum alternatives in PEM electrolyzer cathodes. 9th International Hydrogen Technologies Congress (IHTEC); 2025.
18. [18] Vartiainen E, Breyer C, Moser D, Román Medina E, Busto C, Masson G, et al. True cost of solar hydrogen. Solar RRL 2022;6.
19. [19] Hubert M, Peterson D, Miller E, Vickers J, Mow R, Klembara M, et al. DOE hydrogen program record 24005: Clean hydrogen production cost scenarios with PEM electrolyzer technology. DOE; 2024.
20. [20] US Geological Survey. Mineral commodity summaries 2023. USGS; 2023.
21. [21] IMARC Group. Carbon black market size, share & growth forecast 2034. 2024. https://www.imarcgroup.com/carbon-black-market (accessed April 16, 2026).
22. [22] International Energy Agency (IEA). Global Hydrogen Review. IEA; 2022.