In Situ Formation of FeNi Nanoparticles on Polypyrrole Hydrogel for Efficient Electrocatalytic Nitrate Reduction to Ammonia

Molecules, Год журнала: 2025, Номер 30(6), С. 1271 - 1271

Опубликована: Март 12, 2025

The electrocatalytic reduction of nitrate to ammonia (NH3) under mild environmental conditions is attracting increasing attention, in which efficient and inexpensive transition metal catalysts, with the advantages abundancy low cost, play a key role. However, synergistic activity selectivity promotion are still highly challenging. Herein, we developed hydrogel-assisted strategy prepare FeNi nanoparticles via situ adsorption Fe/Ni precursors on polypyrrole hydrogel. After optimization, maximum NH3 yield reached 0.166 mmol h−1 cm−2, Faradaic efficiency 88.9% 86.6%. This excellent electrochemical performance was attributed mesoporous hydrophilic structure hydrogel, facilitates homogeneous loading provides channel for both charge mass transfer during reduction, important conversion NO3− NH3. Electrochemical active surface area determination impedance spectroscopy showed that introduction hydrogel increased sites improved transfer. study an effective improving electrocatalysts by utilizing three-dimensional network electrical conductivity.

Язык: Английский

Heterostructured Sn/Co oxides for electrocatalytic reduction of nitrate to ammonia

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180522 - 180522

Опубликована: Апрель 1, 2025

Язык: Английский