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Jiang K, Liu W, Lai W, Wang M, Li Q, Wang Z, Yuan J, Deng Y, Bao J, Ji H. NiFe Layered Double Hydroxide/FeOOH Heterostructure Nanosheets as an Efficient and Durable Bifunctional Electrocatalyst for Overall Seawater Splitting. Inorg Chem 2021; 60:17371-17378. [PMID: 34705457 DOI: 10.1021/acs.inorgchem.1c02903] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrolysis of seawater can not only desalinate seawater but also produce high-purity hydrogen. Nevertheless, the presence of chloride ions in seawater will cause electrode corrosion and also undergo a chlorine oxidation reaction (ClOR) that competes with the oxygen evolution reaction (OER). Therefore, highly efficient and long-term stable electrocatalysts are needed in this field. In this work, an advanced bifunctional electrocatalyst based on NiFe layered double hydroxide (LDH)/FeOOH heterostructure nanosheets (NiFe LDH/FeOOH) was synthesized on nickel-iron foam (INF) via a simple electrodeposition method. The NiFe LDH/FeOOH electrode demonstrates excellent electrocatalytic activity and stability, which results from the strong interaction between FeOOH and NiFe LDH. Furthermore, ex situ X-ray photoelectron spectroscopy (XPS) and in situ Raman spectroscopy revealed the catalytic process and also demonstrated that the NiFe LDH/FeOOH heterostructure could facilitate the formation of active NiOOH species in the reaction. The obtained NiFe LDH/FeOOH catalyst displays low overpotentials of 181.8 mV at 10 mA·cm-2 for hydrogen evolution reaction (HER) and 286.2 mV at 100 mA·cm-2 for OER in the 1.0 M KOH + 0.5 M NaCl electrolyte. Furthermore, it also exhibits a low voltage of 1.55 V to achieve the current density of 10 mA·cm-2 and works steadily for 105 h at 100 mA·cm-2 for overall alkaline simulated seawater splitting. This work will afford a valid strategy for designing a non-noble metal catalyst for seawater splitting.
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Affiliation(s)
- Kun Jiang
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Wenjun Liu
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Wei Lai
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Menglian Wang
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Qian Li
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Zhaolong Wang
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Junjie Yuan
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Yilin Deng
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Jian Bao
- Institute for Energy Research, School of Material Science & Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu Province 212013, P.R. China
| | - Hongbing Ji
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, P.R. China
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