TY - JOUR
T1 - Sulfur enriched cobalt-based layered double hydroxides for oxygen evolution reactions
AU - Ullah, Sajid
AU - Shamraiz, Umair
AU - Elizbit,
AU - Badshah, Amin
AU - Raza, Bareera
AU - Farooqi, Ahmad Salam
AU - Tofil, Hafiz Muhammad
AU - Zeb, Muhammad Adnan
AU - Alfantazi, Akram
N1 - Funding Information:
We are thankful to Higher Education of Pakistan for financial support.
Publisher Copyright:
© 2021 Hydrogen Energy Publications LLC
PY - 2022/8/22
Y1 - 2022/8/22
N2 - Sulfur and zinc substituted Co(OH)2 is synthesized by a simple co-precipitation one-step method followed by solvothermal treatment for oxygen evolution reaction. The high-resolution X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) demonstrates that the Zn and S substitution significantly stabilizes the layered structure and causes an increase in the electron density around the Co center. The role of both cation and anion substitution is evaluated to enhance the oxygen evolution reactions. This enhanced activity is due to the in-situ oxidation of divalent Co into trivalent Co, and partially due to the stabilization of the layered structure, as highlighted by PXRD and TEM analysis, the gap between the layers is slightly reduced from 7.8 Å to 7.5 Å, for S–Zn–Co(OH)2. The in-situ conversion of Co2+ to Co3+ during electrocatalysis improved the OER electrocatalysis. The structural and physical characterizations are performed via XRD, EDX, SEM, TEM, XPS, AFM and BET.
AB - Sulfur and zinc substituted Co(OH)2 is synthesized by a simple co-precipitation one-step method followed by solvothermal treatment for oxygen evolution reaction. The high-resolution X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) demonstrates that the Zn and S substitution significantly stabilizes the layered structure and causes an increase in the electron density around the Co center. The role of both cation and anion substitution is evaluated to enhance the oxygen evolution reactions. This enhanced activity is due to the in-situ oxidation of divalent Co into trivalent Co, and partially due to the stabilization of the layered structure, as highlighted by PXRD and TEM analysis, the gap between the layers is slightly reduced from 7.8 Å to 7.5 Å, for S–Zn–Co(OH)2. The in-situ conversion of Co2+ to Co3+ during electrocatalysis improved the OER electrocatalysis. The structural and physical characterizations are performed via XRD, EDX, SEM, TEM, XPS, AFM and BET.
KW - Cation and anion substitution
KW - Cobalt hydroxide
KW - High current density
KW - Oxygen evolution reaction
KW - Water oxidation
UR - http://www.scopus.com/inward/record.url?scp=85116910891&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2021.09.201
DO - 10.1016/j.ijhydene.2021.09.201
M3 - Article
AN - SCOPUS:85116910891
SN - 0360-3199
VL - 47
SP - 30799
EP - 30809
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 72
ER -