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Singh B, Kumar R, Verma N, Draksharapu A. Introducing Sulfur in VNi-Layered Double Hydroxide Enables Efficient Electrocatalytic Oxidation of Benzylamine with High Current Densities. ACS APPLIED MATERIALS & INTERFACES 2025. [PMID: 39780536 DOI: 10.1021/acsami.4c20149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2025]
Abstract
The replacement of the thermodynamically unfavorable anodic oxygen evolution reaction (OER) with a more favorable organic oxidation reaction, such as the anodic oxidation of benzylamine, has garnered significant interest in hybrid water electrolyzer cells. This approach promises the production of value-added chemicals alongside hydrogen fuel generation, improving overall energy efficiency. However, achieving high current density for benzylamine oxidation without interference from OER remains a challenge, limiting the practical efficiency of the electrolyzer cell. In this study, we investigated a room temperature method for sulfur introduction in VNi-layered double hydroxide (LDH) catalyst and its application for electrocatalytic benzylamine oxidation. The S-introduction in VNi-LDH was found to modulate the electronic states of nickel and vanadium, increasing the number of active sites, electrochemical surface area, and charge transfer properties. The resulting S-VNi-LDH catalyst achieved a high current density of 400 mA cm-2 at only 1.39 V vs RHE potential for benzylamine oxidation, avoiding interference from oxygen evolution. The catalyst demonstrated 100% selectivity (Faradaic Efficiency = 98.6%) for the conversion of benzylamine into benzonitrile within 2.5 h of the reaction. In a two-electrode electrolysis system, S-VNi-LDH achieved a current density of 400 mA cm-2 at a cell voltage of 1.50 V when OER was substituted with benzylamine oxidation. The S-VNi-LDH showed energy consumption of 4.67 kWh/m3 H2 for OER and 1.31 kWh/m3 H2 during benzylamine oxidation, indicating a high energy efficiency with exceptional stability over five cycles, maintaining 98.6 ± 0.4% FE and consistent voltage. The S-VNi-LDH also oxidized various amines, including substituted benzylamines and secondary amines, achieving high conversion (95-97%) and faradaic efficiency (85.8-98%). This study presents an eco-friendly, room-temperature method for S-doping in VNi-LDH, which out performed the reported catalysts in the literature.
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Affiliation(s)
- Baghendra Singh
- Southern Laboratories-208A, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Rakesh Kumar
- Southern Laboratories-208A, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Neetu Verma
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi 221005, India
| | - Apparao Draksharapu
- Southern Laboratories-208A, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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Zhang Y, Liu R, Ma Y, Jian N, Ge H, Pan H, Zhang Y, Zhang C, Liu Y, Deng J, Li L, Zhao J, Yu J, Cabot A, Li J. Surface Selenium Coating Promotes Selective Methanol-to-Formate Electrooxidation on Ni 3Se 4 Nanoparticles. Inorg Chem 2024; 63:23328-23337. [PMID: 39565610 DOI: 10.1021/acs.inorgchem.4c03996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2024]
Abstract
In the quest to replace fossil fuels and reduce carbon dioxide emissions, developing energy technologies based on clean catalytic processes is fundamental. However, the cost-effectiveness of these technologies strongly relies on the availability of efficient catalysts made of abundant elements. Herein, this study presents a one-step hydrothermal method to obtain a series of Ni3Se4 nanoparticles with a layer of amorphous selenium on their surface. When employed as electrocatalysts for the methanol oxidation reaction (MOR), the optimized proper surface Se-coated Ni3Se4 nanoparticles exhibit a high current density of 160 mA cm-2 at 1.6 V, achieving a high methanol-to-formate Faradaic efficiency above 97.8% and excellent stability with less than 20% current decay after an 18 h chronoamperometry test. This excellent performance is rationalized using density functional theory calculations, which unveil that the electrochemical recombination of SeOx results in a reduction of the energy barrier for the dehydrogenation of methanol during the MOR process.
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Affiliation(s)
- Yong Zhang
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Rong Liu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
- School of Preclinical Medicine, Chengdu University, Chengdu 610106, China
| | - Yi Ma
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Ning Jian
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Huan Ge
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Huiyan Pan
- School of Biological and Chemical Engineering, Nanyang Institute of Science and Technology, Nanyang 473004, China
| | - Yu Zhang
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Chaoqi Zhang
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Yongliang Liu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Jie Deng
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Luming Li
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Jun Zhao
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Jing Yu
- Catalonia Institute for Energy Research - IREC, Sant Adrià de Besòs, 08930 Barcelona, Catalonia, Spain
| | - Andreu Cabot
- Catalonia Institute for Energy Research - IREC, Sant Adrià de Besòs, 08930 Barcelona, Catalonia, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Catalonia, Spain
| | - Junshan Li
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
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Chen L, Yin ZH, Cui JY, Li CQ, Song K, Liu H, Wang JJ. Unlocking Lattice Oxygen on Selenide-Derived NiCoOOH for Amine Electrooxidation and Efficient Hydrogen Production. J Am Chem Soc 2024; 146:27090-27099. [PMID: 39305252 DOI: 10.1021/jacs.4c09252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2024]
Abstract
In pursuit of advancing the electrooxidation of amines, which is typically encumbered by the inertness of C(sp3)-H/N(sp3)-H bonds, our study introduces a high-performance electrocatalyst that significantly enhances the production efficiency of vital chemicals and fuels. We propose a novel electrocatalytic strategy employing a uniquely designed (NixCo1-x)Se2-R electrocatalyst, which is activated through Se-O exchange and electron orbital spin manipulation. This catalyst efficiently generates M4+ species, thus enabling the activation of lattice oxygen and streamlining the electrooxidation of amines. Empirical evidence from isotope labeling, molecular probes, and computational analyses indicates that the electrocatalyst fosters the formation of energetically favorable peroxy radical intermediates, which substantially expedite the reaction kinetics. The refined electrocatalyst achieves an exceptional current density of 20 mA cm-2 at a potential of 1.315 V, with selectivity surpassing 99% for propionitrile, while demonstrating remarkable stability over 560 h. This work emphasizes the criticality of deciphering the fundamental mechanisms of amine electrooxidation and charts a more sustainable pathway for the nitrile and hydrogen production, marking a substantial advancement in the field of electrocatalysis.
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Affiliation(s)
- Long Chen
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Zhao-Hua Yin
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Jun-Yuan Cui
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Chao-Qun Li
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Kepeng Song
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Hong Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
- Institute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan 250022, China
| | - Jian-Jun Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
- Shenzhen Research Institute of Shandong University, Shenzhen 518057, China
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