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Chen Z, Lin Y, Zhou Y, Yang Y, Zhong Y, Xu M, Li W. A facile synthesis of FeS/Fe 3C nanoparticles highly dispersed on in situ grown N-doped CNTs as cathode electrocatalysts for microbial fuel cells. Phys Chem Chem Phys 2023; 25:21191-21199. [PMID: 37530031 DOI: 10.1039/d3cp02152a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
A novel composite of iron sulfide, iron carbide and nitrogen carbides (Nano-FeS/Fe3C@NCNTs) as a cathode electrocatalyst for microbial fuel cells (MFCs) is synthesized by a one-pot solid state reaction, which yields a unique configuration of FeS/Fe3C nanoparticles highly dispersed on in situ grown nitrogen-doped carbon nanotubes (NCNTs). The highly dispersed FeS/Fe3C nanoparticles possess large active sites, while the NCNTs provide an electronically conductive network. Consequently, the resultant Nano-FeS/Fe3C@NCNTs exhibit excellent electrocatalytic activity towards the oxygen reduction reaction (ORR), with a half-wave potential close to that of Pt/C (about 0.88 V vs. RHE), and enable MFCs to deliver a power density of 1.28 W m-2 after two weeks' operation, which is higher than that of MFCs with Pt/C as the cathode electrocatalyst (1.02 W m-2). Theoretical calculations and experimental data demonstrate that there is a synergistic effect between Fe3C and FeS in Nano-FeS/Fe3C@NCNTs. Fe3C presents a strong attraction and electron-donating tendency to oxygen molecules, serving as the main active component, while FeS reduces charge transfer resistance by transferring electrons to Fe3C, synergistically improving the kinetics of the ORR and power density of MFCs.
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Affiliation(s)
- Zhuoyue Chen
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Yingyu Lin
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Yuying Zhou
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Yuxian Yang
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Yaotang Zhong
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
| | - Mengqing Xu
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
- National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Key Lab. of ETESPG (GHEI), South China Normal University, Guangzhou 510006, China
| | - Weishan Li
- School of Chemistry, South China Normal University, Guangzhou 510006, China.
- National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs, Engineering Research Center of MTEES (Ministry of Education), and Key Lab. of ETESPG (GHEI), South China Normal University, Guangzhou 510006, China
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Maouche C, Wang Y, Cheng C, Wang W, Li Y, Qureshi WA, Huang P, Amjad A, Zhou Y, Yang J. Sulfur doped Fe N C catalysts derived from Dual-Ligand zeolitic imidazolate framework for the oxygen reduction reaction. J Colloid Interface Sci 2022; 623:146-154. [DOI: 10.1016/j.jcis.2022.04.157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 01/25/2023]
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