Flexible and Binder-Free Iron Phosphide Electrodes Using a Three-Dimensional Support for High Hydrogen Productivity
Díez-García, María Isabel (Institut de Recerca en Energia de Catalunya)
García Blanco, Andrés Alberto (Instituto de Física Aplicada)
Murcia López, Sebastián (Institut de Recerca en Energia de Catalunya)
Botifoll, Marc (Institut Català de Nanociència i Nanotecnologia)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Qamar, Mohammad (King Fahd University of Petroleum and Minerals)
Morante, Joan Ramon (Institut de Recerca en Energia de Catalunya)

Date:	2023
Abstract:	In this work, an inexpensive and reliable microstructured electrode for the hydrogen evolution reaction (HER) is developed. This cathode is made of Earth-abundant elements consisting of iron phosphide as an electrocatalyst and carbon felt (CF) as a flexible conductive scaffold. Its porous character and binder-free FeP coverage over the carbon fibers generate a high number of accessible active sites for the reaction, achieving a high value of the electrochemically active surface area. The electrode reaches 100 mA ⋅ cm by applying only -53 mV vs RHE at 50 °C in 0. 5 M HSO, demonstrating excellent electrocatalytic activity for the HER and outstanding stability in acidic electrolyte. Furthermore, the feasibility of these electrodes for industrial application is evaluated using a PEM electrolyzer. The developed prototype with a cathodic area of 1. 8 cm shows a very promising performance, reaching 14. 9 mmol H ⋅ h ⋅ cm (corresponding to 800 mA ⋅ cm) at a voltage of only 2. 1 V.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00457 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-01581 Agencia Estatal de Investigación PID2020-116093RB-C42 Agencia Estatal de Investigación PID2020-116093RB-C43 Ministerio de Ciencia e Innovación FJC2018-036229-I European Commission 801342 Agencia Estatal de Investigación CEX2021-001214-S
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	ChemElectroChem, Vol. 10, Issue 17 (September 2023) , art. e202201152, ISSN 2196-0216

DOI: 10.1002/celc.202201152

8 p, 3.7 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles