TY - JOUR
T1 - Construction of MnFe layer double hydroxide on biomass-derived carbon heterostructure for efficient electrocatalytic water splitting
AU - Mariappan, Athibala
AU - Dharman, Ranjith Kumar
AU - Oh, Tae Hwan
AU - Prabu, Samikannu
AU - Chiang, Kung Yuh
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - In recent years, designing effective and stable non-metal electrocatalysts for water-splitting has received considerable attention. In this study, a bio-derived carbon/MnFe-layered double hydroxide (LDH) (MnFe–C) catalyst was synthesized by pyrolysis process followed by a hydrothermal method. The MnFe–C electrocatalyst showed outstanding hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities in 1 M KOH, with overpotentials of 120 and 280 mV at 10 mA cm−2 and smaller Tafel values of 86 and 92 mV dec−1, respectively. Furthermore, the MnFe–C electrocatalyst exhibited robust stability (50 h) for both the HER and OER in an alkaline medium. This remarkable water-splitting performance is ascribed owing to the synergistic effects of the heterostructure formation of MnFe-LDH and the bio-carbon. In addition, the electrocatalyst exhibited better electrical conductivity, faster electron transfer, and more surface-active sites, which collectively enhanced the overall electrocatalytic performance. Therefore, this study offers a dynamic approach to the development of efficient multifunctional electrocatalysts for alkaline water electrolyzers.
AB - In recent years, designing effective and stable non-metal electrocatalysts for water-splitting has received considerable attention. In this study, a bio-derived carbon/MnFe-layered double hydroxide (LDH) (MnFe–C) catalyst was synthesized by pyrolysis process followed by a hydrothermal method. The MnFe–C electrocatalyst showed outstanding hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities in 1 M KOH, with overpotentials of 120 and 280 mV at 10 mA cm−2 and smaller Tafel values of 86 and 92 mV dec−1, respectively. Furthermore, the MnFe–C electrocatalyst exhibited robust stability (50 h) for both the HER and OER in an alkaline medium. This remarkable water-splitting performance is ascribed owing to the synergistic effects of the heterostructure formation of MnFe-LDH and the bio-carbon. In addition, the electrocatalyst exhibited better electrical conductivity, faster electron transfer, and more surface-active sites, which collectively enhanced the overall electrocatalytic performance. Therefore, this study offers a dynamic approach to the development of efficient multifunctional electrocatalysts for alkaline water electrolyzers.
KW - Bio-derived carbon
KW - Electrocatalysts
KW - Hydrogen evolution reaction
KW - MnFe-LDH
KW - Oxygen evolution reaction
UR - http://www.scopus.com/inward/record.url?scp=85169028449&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2023.128321
DO - 10.1016/j.matchemphys.2023.128321
M3 - 期刊論文
AN - SCOPUS:85169028449
SN - 0254-0584
VL - 309
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 128321
ER -
