MoS2 Decoration Followed by P Inclusion over Ni-Co Bimetallic Metal-Organic Framework-Derived Heterostructures for Water Splitting
- Authors
- Gopi, Sivalingam; Selvamani, Vadivel; Yun, Kyusik
- Issue Date
- Jul-2021
- Publisher
- AMER CHEMICAL SOC
- Citation
- INORGANIC CHEMISTRY, v.60, no.14, pp.10772 - 10780
- Journal Title
- INORGANIC CHEMISTRY
- Volume
- 60
- Number
- 14
- Start Page
- 10772
- End Page
- 10780
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/81793
- DOI
- 10.1021/acs.inorgchem.1c01478
- ISSN
- 0020-1669
- Abstract
- Demonstrating a highly efficient non-noble bifunctional catalyst for complete water electrolysis remains challenging because of kinetic limitations and crucial importance for future energy harvesting. Herein, a low-cost, integrated composite of a Ni-Co metal-organic framework decorated with thin MoS2 nanosheets was synthesized by a simple hydrothermal method followed by carbonization and phosphorization for electrochemical oxygen and hydrogen evolution reactions. Such a composite heterostructure exhibits outstanding performance in the electrocatalysis process with a lower overpotential of 184 mV for the oxygen evolution reaction (OER) and 84 mV for the hydrogen evolution reaction (HER) in 1.0 M KOH and 0.5 M H2SO4 electrolytes to reach a current density of 10 mA cm(-2), with a slight Tafel slope of 63 mV dec(-1) for the OER and 96 mV dec(-1) for the HER. The obtained results are far better than those of the commercial benchmark catalyst. Furthermore, online gas chromatography quantifies the amount of hydrogen generation in a symmetric cell as equal to 0.002121 moles with an energy efficiency of about 2.237 mg/kWh. Thus, the composite electrode's remarkable performance is further demonstrated as a potentially viable alternative non-noble electrocatalyst for energy conversion reactions.
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- 산업·환경대학원 > 산업환경공학과 > 1. Journal Articles
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