TY - JOUR
T1 - Nanostructured Fe-Doped Ni3S2 Electrocatalyst for the Oxygen Evolution Reaction with High Stability at an Industrially-Relevant Current Density
AU - Zhu, Jiahui
AU - Chen, Wei
AU - Poli, Stefano
AU - Jiang, Tao
AU - Gerlach, Dominic
AU - Junqueira, João R.C.
AU - Stuart, Marc C.A.
AU - Kyriakou, Vasileios
AU - Costa Figueiredo, Marta
AU - Rudolf, Petra
AU - Miola, Matteo
AU - Morales, Dulce M.
AU - Pescarmona, Paolo P.
N1 - Publisher Copyright:
© 2024 The Authors. Published by American Chemical Society.
PY - 2024/10/30
Y1 - 2024/10/30
N2 - A novel oxygen evolution reaction (OER) electrocatalyst was prepared by a synthesis strategy consisting of the solvothermal growth of Ni3S2 nanostructures on Ni foam, followed by hydrothermal incorporation of Fe species (Fe-Ni3S2/Ni foam). This electrocatalyst displayed a low OER overpotential of 230 mV at 100 mA·cm-2, a low Tafel slope of 43 mV·dec-1, and constant performance at an industrially relevant current density (500 mA·cm-2) over 100 h in a 1.0 M KOH electrolyte, despite a minor loss of Fe in the process. Based on a detailed characterization by (in situ) Raman spectroscopy, (quasi-in situ) XPS, SEM, TEM, XRD, ICP-AES, EIS, and Cdl analysis, the high OER activity and stability of Fe-Ni3S2/Ni foam were attributed to the nanostructuring of the surface in the form of stable nanosheets and to the combination of Ni3S2 granting suitable electrical conductivity with newly formed NiFe-based (oxy)hydroxides at the surface of the material providing the active sites for OER.
AB - A novel oxygen evolution reaction (OER) electrocatalyst was prepared by a synthesis strategy consisting of the solvothermal growth of Ni3S2 nanostructures on Ni foam, followed by hydrothermal incorporation of Fe species (Fe-Ni3S2/Ni foam). This electrocatalyst displayed a low OER overpotential of 230 mV at 100 mA·cm-2, a low Tafel slope of 43 mV·dec-1, and constant performance at an industrially relevant current density (500 mA·cm-2) over 100 h in a 1.0 M KOH electrolyte, despite a minor loss of Fe in the process. Based on a detailed characterization by (in situ) Raman spectroscopy, (quasi-in situ) XPS, SEM, TEM, XRD, ICP-AES, EIS, and Cdl analysis, the high OER activity and stability of Fe-Ni3S2/Ni foam were attributed to the nanostructuring of the surface in the form of stable nanosheets and to the combination of Ni3S2 granting suitable electrical conductivity with newly formed NiFe-based (oxy)hydroxides at the surface of the material providing the active sites for OER.
KW - electrocatalyst
KW - Fe doping
KW - nanostructuring
KW - NiS
KW - oxygen evolution reaction
UR - http://www.scopus.com/inward/record.url?scp=85206459578&partnerID=8YFLogxK
U2 - 10.1021/acsami.4c09821
DO - 10.1021/acsami.4c09821
M3 - Article
C2 - 39404487
AN - SCOPUS:85206459578
SN - 1944-8244
VL - 16
SP - 58520
EP - 58535
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 43
ER -