Modulating interfacial electronic coupling of copper-mediated NiFe layered double hydroxide nanoprisms via structural engineering for efficient OER in wireless photovoltaic-coupled and anion exchange membrane water electrolysis
- Authors
- Chanda, Debabrata; Kwon, Hyunguk; Meshesha, Mikiyas Mekete; Gwon, Jang Seok; Ju, Minkyu; Kim, Kyeounghak; Yang, Bee Lyong
- Issue Date
- Jan-2024
- Publisher
- ELSEVIER
- Keywords
- CuNiFe-LDH nanoprism; Non-noble metal electrocatalyst; Oxygen evolution reaction; Photovoltaic-electrochemical cell system; Anion exchange membrane water electrolyzer
- Citation
- APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY, v.340
- Journal Title
- APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
- Volume
- 340
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/26439
- DOI
- 10.1016/j.apcatb.2023.123187
- ISSN
- 0926-3373
1873-3883
- Abstract
- In this work, a facile method is used to fabricate Cu-mediated NiFe-LDH (CuNiFe-LDH) nanoprisms from conductive metal-organic frameworks (MOFs; NiFe MIL-88A). The initial MOF structure is stabilized by electronic coupling and Cu ion coordination. The CuNiFe-LDH nanoprisms exhibit excellent OER performance, with an overvoltage of 204 mV at a current density of 10 mA cm-2 and a low activation energy of 15.45 kJ mol-1. Mechanistic investigations using density functional theory calculations demonstrate that the Cu sites in CuNiFeLDH are highly efficient for OER and that CuNiFe-LDH has a lower theoretical overpotential than NiFe-LDH. A wireless photovoltaic-electrochemical cell, developed using a CuNiFe-LDH/Ni fiber paper (NFP) anode and NiFe2O4/NFPcathode, achieves a solar-to-hydrogen efficiency of 11.08%. Additionally, the excellent performance of anion exchange membrane water electrolyzer incorporating the CuNiFe-LDH catalyst, including a j of 974 mA cm-2 at 1.85 V, and 46.9 kWh of electricity consumed per 1 kg of hydrogen produced.
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Collections - Department of Materials Science and Engineering > 1. Journal Articles
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