TY - JOUR
T1 - Holey Assembly of Two-Dimensional Iron-Doped Nickel-Cobalt Layered Double Hydroxide Nanosheets for Energy Conversion Application
AU - Septiani, Ni Luh Wulan
AU - Kaneti, Yusuf Valentino
AU - Guo, Yanna
AU - Yuliarto, Brian
AU - Jiang, Xuchuan
AU - Ide, Yusuke
AU - Nugraha, Nugraha
AU - Dipojono, Hermawan Kresno
AU - Yu, Aibing
AU - Sugahara, Yoshiyuki
AU - Golberg, Dmitri
AU - Yamauchi, Yusuke
N1 - Funding Information:
This work was supported by Australian Research Council (ARC) Future Fellowship (FT150100479) and World Class Professor (WCP) program (Grant No. 123.11/D2.3/KP/2018). D.G. is grateful to the Australian Research Council (ARC) for granting a Laureate Fellowship FL160100089 and to QUT projects Nos 322170‐0355/51 and 322170‐0348/07. The authors also acknowledge financial grants provided by Institute of Technology Bandung (ITB), Indonesia and Ministry of Research, Technology, and Higher Education of Indonesia, and Lembaga Pengelola Dana Pendidikan (LPDP), Ministry of Finance of Indonesia. This work was performed in part at the Queensland node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano‐ and microfabrication facilities for Australia′s researchers.
Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/3/20
Y1 - 2020/3/20
N2 - Layered double hydroxides (LDHs) containing first-row transition metals such as Fe, Co, and Ni have attracted significant interest for electrocatalysis owing to their abundance and excellent performance for the oxygen evolution reaction (OER) in alkaline media. Herein, the assembly of holey iron-doped nickel-cobalt layered double hydroxide (NiCo-LDH) nanosheets (‘holey nanosheets’) is demonstrated by employing uniform Ni–Co glycerate spheres as self-templates. Iron doping was found to increase the rate of hydrolysis of Ni–Co glycerate spheres and induce the formation of a holey interconnected sheet-like structure with small pores (1–10 nm) and a high specific surface area (279 m2 g−1). The optimum Fe-doped NiCo-LDH OER catalyst showed a low overpotential of 285 mV at a current density of 10 mA cm−2 and a low Tafel slope of 62 mV dec−1. The enhanced OER activity was attributed to (i) the high specific surface area of the holey nanosheets, which increases the number of active sites, and (ii) the improved kinetics and enhanced ion transport arising from the iron doping and synergistic effects.
AB - Layered double hydroxides (LDHs) containing first-row transition metals such as Fe, Co, and Ni have attracted significant interest for electrocatalysis owing to their abundance and excellent performance for the oxygen evolution reaction (OER) in alkaline media. Herein, the assembly of holey iron-doped nickel-cobalt layered double hydroxide (NiCo-LDH) nanosheets (‘holey nanosheets’) is demonstrated by employing uniform Ni–Co glycerate spheres as self-templates. Iron doping was found to increase the rate of hydrolysis of Ni–Co glycerate spheres and induce the formation of a holey interconnected sheet-like structure with small pores (1–10 nm) and a high specific surface area (279 m2 g−1). The optimum Fe-doped NiCo-LDH OER catalyst showed a low overpotential of 285 mV at a current density of 10 mA cm−2 and a low Tafel slope of 62 mV dec−1. The enhanced OER activity was attributed to (i) the high specific surface area of the holey nanosheets, which increases the number of active sites, and (ii) the improved kinetics and enhanced ion transport arising from the iron doping and synergistic effects.
KW - electrocatalysis
KW - layered double hydroxide
KW - nanosheets
KW - oxygen evolution reaction
KW - two-dimensional materials
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U2 - 10.1002/cssc.201901364
DO - 10.1002/cssc.201901364
M3 - Article
C2 - 31270940
AN - SCOPUS:85070673213
SN - 1864-5631
VL - 13
SP - 1645
EP - 1655
JO - ChemSusChem
JF - ChemSusChem
IS - 6
ER -