ChemElectroChem · 2022 · 13 citations · 76 references
Natural SciencesChemical EngineeringMaterials ScienceCatalysisElectrochemical EngineeringElectrochemistryCatalytic MaterialsCathode MaterialsElectrochemical CellsElectrode MaterialsFuel CellsNanotubesCatalytic NanomaterialsElectrocatalystsElectron TransferOxygen Reduction CatalystsOxygen Reduction ReactionPolythiophenePower DensitySpecific Surface Area
Abstract The development of non‐precious metal cathode catalysts for anion exchange membrane fuel cells (AEMFC) is beneficial for achieving a more affordable and sustainable H 2 economy. Herein, we propose a polypyrrole, polythiophene, and multi‐walled carbon nanotube‐based composite material (PPy/PTh/MWCNT) for the electrocatalysis of oxygen reduction reaction (ORR) at the AEMFC cathode. The PPy/PTh/MWCNT catalyst has a tubular micro‐mesoporous structure with high specific surface area. The elemental composition of the catalyst's surface was studied by X‐ray photoelectron spectroscopy. In 0.1 M KOH solution, the ORR half‐wave potential is −0.16 V (SCE) and the electron transfer number is 4. In a single‐cell AEMFC, the PPy/PTh/MWCNT catalyst exhibited a maximum power density of 284 mW cm −2 , which is 86 % of the value obtained using commercial Pt/C cathode catalyst under the same testing conditions.
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The role of hydrogen and fuel cells in the global energy system
Iain Staffell, Daniel Scamman, Anthony Velazquez Abad et al. · Energy & Environmental Science · 2018 · 3.8K citations · Full text