article · International Journal of Hydrogen Energy
Hydrogen peroxide fuel cells offer high theoretical cell voltages and simple architectures, but developing low-cost, efficient cathodes for the hydrogen peroxide reduction reaction remains difficult. To address this, a hybrid cathode combining manganese dioxide and polypyrrole was electrochemically co-deposited onto fluorine-doped tin oxide and assessed in alkaline conditions. The resulting material formed a homogeneous, poorly crystalline film with manganese dioxide particles embedded within the polypyrrole matrix. Compared to pure manganese dioxide, the hybrid material demonstrated increased electrical conductivity, lower charge-transfer resistance, and superior catalytic activity for hydrogen peroxide reduction. Chronoamperometric tests confirmed sustained electrochemical activity, while cathodic current scaled linearly with hydrogen peroxide concentration. Computational modelling, including density functional theory, clarified the molecular interactions between manganese dioxide, polypyrrole, and perchlorate ions, establishing this hybrid composite as an effective cathode material for alkaline hydrogen peroxide reduction.
Hydrogen peroxide fuel cells offer an attractive alternative for clean energy conversion because of their simple designs and high theoretical voltages. Finding practical, non-precious-metal materials to catalyse the reduction reaction is essential for lowering manufacturing costs. Demonstrating that an inexpensive manganese dioxide and conducting polymer composite improves electron transfer and stability helps advance the design of viable alkaline fuel cells.
This work could support developers of alkaline hydrogen peroxide fuel cells seeking cost-effective alternatives to precious-metal catalysts. By relying on inexpensive manganese dioxide and polypyrrole, the approach may appeal to clean energy and electrochemical device manufacturers. However, this is early-stage laboratory research evaluated primarily through electrochemical and computational tests on small-scale electrodes, meaning practical deployment will require further scale-up, long-term operational testing, and full cell integration.
AI-generated from the published abstract. Always read the original work before citing.
Hydrogen peroxide fuel cells are promising energy-conversion systems owing to their high theoretical cell voltage and simple architecture. However, efficient and low-cost cathodes for the hydrogen peroxide reduction reaction (HPRR) remain challenging. Here, a MnO 2 -polypyrrole (PPy) hybrid cathode was electrochemically co-deposited onto fluorine-doped tin oxide (FTO) and evaluated in alkaline media. Structural and morphological analyses confirmed a homogeneous, predominantly poorly crystalline hybrid film with MnO 2 particles incorporated into the PPy matrix. Compared with pristine MnO 2 , the hybrid showed enhanced HPRR activity, lower charge-transfer resistance, and higher electrical conductivity (0.368 vs. 0.254 S cm −1 ). The cathodic current increased linearly with H 2 O 2 concentration (R 2 = 0.9677), while impedance and chronoamperometric measurements indicated improved charge transfer and sustained activity. DFT and atoms-in-molecules analyses provided further insight into interactions among MnO 2 , PPy, and ClO 4 − . These results highlight MnO 2 -PPy as a promising cathode for alkaline HPRR.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1016/j.ijhydene.2026.157298
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
