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Zhang J, Lan J, Xie F, Luo M, Peng M, Palaniyandy N, Tan Y. Nanoporous copper titanium tin (np-Cu 2TiSn) Heusler alloy prepared by dealloying-induced phase transformation for electrocatalytic nitrate reduction to ammonia. J Colloid Interface Sci 2024; 676:323-330. [PMID: 39033673 DOI: 10.1016/j.jcis.2024.07.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 07/06/2024] [Accepted: 07/15/2024] [Indexed: 07/23/2024]
Abstract
Heusler alloys are a series of well-established intermetallic compounds with abundant structure and elemental substitutions, which are considered as potentially valuable catalysts for integrating multiple reactions owing to the features of ordered atomic arrangement and optimized electronic structure. Herein, a nanoporous copper titanium tin (np-Cu2TiSn) Heusler alloy is successfully prepared by the (electro)chemical dealloying transformation method, which exhibits high nitrate (NO3-) reduction performance with an NH3 Faradaic efficiency of 77.14 %, an NH3 yield rate of 11.90 mg h-1 mg-1cat, and a stability for 100 h under neutral condition. Significantly, we also convert NO3- to high-purity ammonium phosphomolybdate with NH4+ collection efficiency of 83.8 %, which suggests a practical approach to convert wastewater nitrate into value-added ammonia products. Experiments and theoretical calculations reveal that the electronic structure of Cu sites is modulated by the ligand effect of surrounding Ti and Sn atoms, which can simultaneously enhance the activation of NO3-, facilitate the desorption of NH3, and reduce the energy barriers, thereby boosting the electrochemical nitrate reduction reaction.
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Affiliation(s)
- Junfeng Zhang
- College of Materials Science and Engineering, State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle, Hunan University, Changsha 410082, Hunan Province, China
| | - Jiao Lan
- College of Materials Science and Engineering, State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle, Hunan University, Changsha 410082, Hunan Province, China
| | - Feng Xie
- College of Materials Science and Engineering, State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle, Hunan University, Changsha 410082, Hunan Province, China
| | - Min Luo
- Shanghai Technical Institute of Electronics & Information, Shanghai 201411, China.
| | - Ming Peng
- College of Materials Science and Engineering, State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle, Hunan University, Changsha 410082, Hunan Province, China; Greater Bay Area Institute for Innovation, Hunan University, Guangzhou 511300, Guangdong Province, China.
| | - Nithyadharseni Palaniyandy
- Institute for Catalysis and Energy Solutions (ICES), College of Science, Engineering, and Technology (CSET), University of South Africa, Florida Science Campus, Roodepoort 1709, South Africa
| | - Yongwen Tan
- College of Materials Science and Engineering, State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle, Hunan University, Changsha 410082, Hunan Province, China.
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Liu Y, Huang L, Liu H, Wang L. Theoretical scheme of the nonvolatile strain switchable high/low resistance based on the novel strain-tunable magnetic anisotropy in Mn2.25Co0.75Ga0.5Sn0.5/MgO superlattice. Phys Chem Chem Phys 2022; 24:7826-7835. [DOI: 10.1039/d1cp05794d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It is great desirable to effectively tune electronic and magnetic properties by simple means such as applying external electrical fields or strains in spintronics research. Here, we investigate the strain...
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