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Qiao H, Yu Y, Xu X, Hao R, Zheng Z, Wen B, Huang H, Hu J. Repairable body-centered cubic Fe 0 anchoring on porous hollow nitrogen-doped carbon spheres with adjusting electron distribution for efficient electrocatalytic ammonia synthesis. J Colloid Interface Sci 2024; 673:537-549. [PMID: 38885539 DOI: 10.1016/j.jcis.2024.06.109] [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: 04/01/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 06/20/2024]
Abstract
Electrocatalytic nitrogen reduction reaction (ENRR) is a promising and efficient method for ammonia production. However, ENRR is restricted by the adsorption and activation of N2. Herein, an efficient nitrogen reduction reaction (NRR) electrocatalyst loaded with zero valent iron (ZVI) particles onto porous nitrogen-doped carbon (NC) hollow spheres is reported. The optimal Fe@10N3C-950 exhibits excellent performance with high ammonia (NH3) yield (152.28 µg h-1 mgcat-1) and Faradaic efficiency (FE, 54.55 %) at - 0.3 V (versus reversible hydrogen electrode, vs. RHE). Bader charge shows that the adsorbed N2 acquires more electrons from Fe sites with body-centered cubic (BCC) structure to better activate N2. Moreover, i-t experiments are performed before electrocatalytic NH3 production to effectively eliminate the effect of oxidation on ZVI and thus, maintain high ENRR activity for Fe@10N3C-950. Theoretical calculations indicate that nitrogen doping not only reduces the Gibbs free energy of rate determining step (RDS), but the BCC-structured Fe can also decrease the energy barriers of N2 activation and RDS.
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Affiliation(s)
- Huici Qiao
- State Key Laboratory of Metastable Materials Science & Technology, Hebei Key Laboratory of Heavy Metal Deep Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Yanming Yu
- State Key Laboratory of Metastable Materials Science & Technology, Hebei Key Laboratory of Heavy Metal Deep Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Xin Xu
- State Key Laboratory of Metastable Materials Science & Technology, Hebei Key Laboratory of Heavy Metal Deep Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Runxian Hao
- State Key Laboratory of Metastable Materials Science & Technology, Hebei Key Laboratory of Heavy Metal Deep Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Zaihang Zheng
- State Key Laboratory of Metastable Materials Science & Technology, Hebei Key Laboratory of Heavy Metal Deep Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Bin Wen
- State Key Laboratory of Metastable Materials Science & Technology, Hebei Key Laboratory of Heavy Metal Deep Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China
| | - Hao Huang
- State Key Laboratory of Metastable Materials Science & Technology, Hebei Key Laboratory of Heavy Metal Deep Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China.
| | - Jie Hu
- State Key Laboratory of Metastable Materials Science & Technology, Hebei Key Laboratory of Heavy Metal Deep Remediation in Water and Resource Reuse, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, PR China.
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Zhou M, Deng X, Zhang N, Chen B, Li G, Yang H. Boron dopant- and nitrogen defect-decorated C 3N 5 porous nanostructure as an efficient sulfur host for lithium-sulfur batteries. J Colloid Interface Sci 2024; 666:151-161. [PMID: 38593650 DOI: 10.1016/j.jcis.2024.04.023] [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: 01/27/2024] [Revised: 03/19/2024] [Accepted: 04/02/2024] [Indexed: 04/11/2024]
Abstract
Active site implantation and morphology manipulation are efficient protocols for boosting the electrochemical performance of carbon nitrides. As a promising sulfur host for lithium-sulfur batteries (LSBs), in this study, C3N5 porous nanostructure incorporated with both boron (B) atoms and nitrogen (N) defects was constructed (denoted as ND-B-C3N5) using a two-step strategy, i.e., pyrolysis of the mixture of 3-amino-1,2, 4-triazole and boric acid to obtain B-doped C3N5 porous nanostructure and then KOH etching under hydrothermal condition to generate N defects. The doped B atoms in the C3N5 porous nanostructure are in the form of B-N bonds and grafted B-O bonds. N defects are primarily created at the CN-C positions of the triazine unit, leaving behind some N vacancies and cyano groups. Benefiting from the involvement of B dopants and N defects, the optimized ND-B-C3N5-12 sample exhibits ameliorative conductivity, mass transport, lithium polysulfides (LiPSs) adsorption ability, diffusion of Li+ ions, Li2S deposition capacity, sulfur redox polarization, and a reversible solid-solid sulfur redox process. Consequently, the ND-B-C3N5-12/S cathode delivers accelerated redox performance of polysulfides for LSBs, revealing capacities of 1091 ± 44 and 753 ± 20 mAh/g at 0.2C for the initial and 300th cycles, respectively. The ND-B-C3N5-12/S cathode is also endowed with desired sulfur redox activity and stability at 2C for 1000 cycles, holding an initial discharging capacity of 788 ± 24 mAh/g and a low decay rate of 0.05 % per cycle.
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Affiliation(s)
- Minjie Zhou
- Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China; School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China
| | - Xianglin Deng
- Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China; School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China
| | - Na Zhang
- School of Physics and Electronic Science, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China
| | - Bing Chen
- Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China; School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China
| | - Gangyong Li
- Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China; School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China
| | - Haihua Yang
- Key Laboratory of Hunan Province for Advanced Carbon-Based Functional Materials, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China; School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan Province, 414006, P.R. China.
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Wu X, Zhao Y, Li H, Zhou C, Wang X, Du L. Sulfurized polyacrylonitrile as cathodes for advanced lithium-sulfur batteries: advances in modification strategies. NANOSCALE 2024; 16:5060-5078. [PMID: 38372701 DOI: 10.1039/d3nr06247c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Sulfurized polyacrylonitrile (S@PAN) composites have gathered a lot of interest because of their advantages of high theoretical energy density, excellent cycling stability, and environmental friendliness. Meanwhile, their unique "covalent bonding" mechanism effectively avoids the dissolution and shuttling of polysulfides, and thus they are expected to be the most promising candidate for the cathode material in lithium-sulfur (Li-S) batteries. Over the past five years, S@PAN cathode materials have been widely studied in Li-S batteries, and it is very important to summarize the advances over time for their practical applications. This article reviews the latest progress concerning the modification of S@PAN cathode materials for improving poor electrical conductivity, low sulfur content, and sluggish reaction kinetics, and proposes possible research directions. We hope this review provides valuable insights and references for future research on Li-S batteries.
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Affiliation(s)
- Xiaolin Wu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yaqi Zhao
- School of Materials and Chemical Engineering, Henan University of Urban Construction, Pingdingshan 467036, China.
| | - Hang Li
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Cheng Zhou
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China.
| | - Xuanpeng Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China.
- Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Wuhan 430070, P. R. China.
| | - Lingzhi Du
- School of Materials and Chemical Engineering, Henan University of Urban Construction, Pingdingshan 467036, China.
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