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Radhakrishnan S, Ramakrishnan S, Jayaraj SK, Mamlouk M, Kim BS. A Simple and Efficient Non-Noble Cathode Catalyst Based on Carbon Hollow Nanocapsules Containing Cobalt-Based Materials for Anion Exchange Membrane Water Electrolyzer. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2025; 21:e2411019. [PMID: 39901531 DOI: 10.1002/smll.202411019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2024] [Revised: 01/01/2025] [Indexed: 02/05/2025]
Abstract
An efficient approach for fabrication of non-noble metal-based electrocatalyst is desirable for designing the energy storage and conversion devices in real-world usages due to low cost and excellent catalytic properties. The preparation of hollow carbon capsules (HCC) containing cobalt (Co)-based electrocatalyst is reported by a simple synthesis process without using templates for the first time. Initially, cobalt phenylphosphonate (Co-MOF) nanorods are fabricated through a simple hydrothermal approach. The as-formed Co-MOF is covered with a thin coating of polydopamine (DP-Co-MOF) through chemical polymerization of dopamine in Tris-HCl (pH 8.5). The DP-Co-MOF is used as self-degraded template for the formation of HCC under pyrolysis. The formation mechanism and hydrogen evolution reaction (HER) activity of HCC are investigated. The hollow structure derived under N2 exhibits a low overpotential (295 mV at 100 mA cm-2) with excellent stability (90.98%) for 150 h, which is further verified by density functional theory (DFT) calculations. Finally, the designed anion exchange membrane (AEM) water electrolyzer based on C─Co─N as cathode delivers a current density of 500 mA cm-2 (at 2.19 V) and 1000 mAcm-2 (at 2.33 V) in 1.0 m KOH at 60 °C. The fabricated new Co-based electrocatalyst is highly beneficial for the fabrication of cost-effective and high-performance AEMWEs.
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Affiliation(s)
- Sivaprakasam Radhakrishnan
- Department of Chemistry, School of Sciences and Humanities, SR University, Warangal, Telangana, 506371, India
| | | | - Santhosh Kumar Jayaraj
- Department of Organic Materials & Textile Engineering, Jeonbuk National University, 567 Baekje-daero, Jeollabuk-do, 54896, Republic of Korea
| | - Mohamed Mamlouk
- School of Engineering, Newcastle University, Tyne and Wear, UK
| | - Byoung-Suhk Kim
- Department of Organic Materials & Textile Engineering, Jeonbuk National University, 567 Baekje-daero, Jeollabuk-do, 54896, Republic of Korea
- Department of JBNU-KIST Industry-Academia Convergence Research, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
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Computational Modelling of Pyrrolic MN4 Motifs Embedded in Graphene for Catalyst Design. Catalysts 2023. [DOI: 10.3390/catal13030566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
Abstract
Carbon-based materials doped with metal and nitrogen (M-N-Cs) have promising potential in electrocatalytic applications with the advantage of material sustainability. MN4 motifs incorporated into a carbon lattice are generally known to be responsible for the activity of these materials. While many computational studies assume the tetrapyridinic MN4 motifs, recent studies have elucidated the role of tetrapyrrolic MN4 motifs in electrocatalysis. Using density functional theory, we constructed and compared various structural models to study the incorporation of tetrapyrrolic and tetrapyridinic MN4 motifs in 2D carbon materials and analyzed the type of interactions between each metal species and the N4 site. We further quantified the relative affinity of various metal species to the two types of N4 site. Upon analysis of energies, bond lengths, electronic population and charges, we found that metals that exhibit highly ionic binding characters have a greater affinity towards tetrapyrrolic MN4 motifs compared to species that participate in covalent interactions with the π-system. Furthermore, the binding strength of each species in the N4 site depend on the electronegativity as well as the availability of orbitals for accepting electrons from the π-system.
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Chu Z, Gong W, Muhammad Y, Shah SJ, Liu Q, Xing L, Zhou X, Liu Y, Zhao Z, Zhao Z. Construction of a nano dispersed Cr/Fe-polycrystalline sensor via high-energy mechanochemistry for simultaneous electrochemical determination of dopamine and uric acid. Mikrochim Acta 2023; 190:101. [PMID: 36821056 DOI: 10.1007/s00604-023-05688-0] [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: 10/18/2022] [Accepted: 02/07/2023] [Indexed: 02/24/2023]
Abstract
A bimetallic polycrystalline sensor (Cr/Fe-SNCM) having nanosized and high dispersion was designed and used for the electrochemical simultaneous determination of dopamine (DA) and uric acid (UA). Catalytic nanosized Cr/Fe were highly anchored on N/S/O-contained porous carbon with high dispersion and polycrystalline Cr/Fe via energetic mechanochemical method and high-temperature carbonization. The obtained Cr/Fe-SNCM exhibited high graphitized carbon supporter and endowed high electron transport and signal output for the whole sensor. Moreover, highly dispersed Cr/Fe sites and the polycrystalline form (metal-N/S/O) efficiently enhanced the catalytic reaction, leading to a limits of detection (based on the 3σ/m criterion) of 25.8 and 22.5 nM for DA and UA, respectively. This is 1-2 orders of magnitude lower than many state-of-the-art reported sensors. The Cr/Fe-SNCM1.0 sensor exhibited wide working range (0.1 to 10.0 μM), high recovery (96-103%) and low relative standard deviation (RSD = 3.2-4.7%) for DA and UA in real serum samples, possessing high significance for practical large-scale applications.
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Affiliation(s)
- Zhe Chu
- School of Chemistry and Chemical Engineering, New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Guangxi University, Nanning, 530004, China
| | - Wenxue Gong
- School of Chemistry and Chemical Engineering, New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Guangxi University, Nanning, 530004, China
| | - Yaseen Muhammad
- Institute of Chemical Sciences, University of Peshawar, Peshawar, 25120, KP, Pakistan
| | - Syed Jalil Shah
- School of Chemistry and Chemical Engineering, New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Guangxi University, Nanning, 530004, China
| | - Qing Liu
- School of Chemistry and Chemical Engineering, New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Guangxi University, Nanning, 530004, China
| | - Linguang Xing
- Guangxi Nanning Baihui Pharmaceutical Group Co., Ltd., No. 2, Zhongyu South Road, Xixiangtang District, Nanning City, China
| | - Xueyun Zhou
- Guangxi Nanning Baihui Pharmaceutical Group Co., Ltd., No. 2, Zhongyu South Road, Xixiangtang District, Nanning City, China
| | - Ying Liu
- Guangxi Nanning Baihui Pharmaceutical Group Co., Ltd., No. 2, Zhongyu South Road, Xixiangtang District, Nanning City, China
| | - Zhenxia Zhao
- School of Chemistry and Chemical Engineering, New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Guangxi University, Nanning, 530004, China
| | - Zhongxing Zhao
- School of Chemistry and Chemical Engineering, New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Guangxi University, Nanning, 530004, China.
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Sun Z, Ye Y, Zhu J, Zhou E, Xu J, Liu M, Kong X, Jin S, Ji H. Regulating Sodium Deposition through Gradiently-Graphitized Framework for Dendrite-Free Na Metal Anode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107199. [PMID: 35373497 DOI: 10.1002/smll.202107199] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 02/16/2022] [Indexed: 06/14/2023]
Abstract
Na metal anode (NMA) is one of the most promising candidate materials for next-generation low-cost sodium metal batteries. However, the preferred deposition of Na metal at the anode/separator interface increases the risk of dendrite penetration of the separator, consequently, reduces safety and life of batteries with NMA. In this study, a Na deposition-regulating strategy is shown by designing a gradiently graphitized 3D carbon fiber (CF) framework as host (grad-CF), whereby Na is guided to deposit preferentially at the bottom of the anode, safely away from the separator. The obtained Na anode significantly reduces the probability of dendrite-induced short circuits. The grad-CF host enables NMA stable cycling at a high current density of 6 mA cm-2 . When the Na@grad-CF is applied as anode in full cells pared with Na3 V2 (PO4 )3 (NVP) cathode, it exhibits a reversible capacity of 73 mA h g-1 after 500 cycles with a low decay rate of 0.13%.
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Affiliation(s)
- Zhaowei Sun
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Applied Chemistry, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026, China
| | - Yadong Ye
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Applied Chemistry, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026, China
| | - Jiawen Zhu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Applied Chemistry, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026, China
| | - En Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Applied Chemistry, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026, China
| | - Junjie Xu
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Minghui Liu
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Xianghua Kong
- School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, China
| | - Song Jin
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Applied Chemistry, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026, China
| | - Hengxing Ji
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Applied Chemistry, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026, China
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A low-cost high-entropy porous CrO/CrN/C biosensor for highly sensitive simultaneous detection of dopamine and uric acid. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107188] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Iwase K, Hirano T, Honma I. Copper Aluminum Layered Double Hydroxides with Different Compositions and Morphologies as Electrocatalysts for the Carbon Dioxide Reduction Reaction. CHEMSUSCHEM 2022; 15:e202102340. [PMID: 34826212 DOI: 10.1002/cssc.202102340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/22/2021] [Indexed: 05/07/2023]
Abstract
Electrochemical CO2 reduction (CO2 RR) is a key technology to convert greenhouse gas CO2 to value-added products, such as CO and formic acid (HCOOH). In the present study, two-dimensional Cu- and Al-based layered double hydroxides (Cu-Al/LDHs) were applied as CO2 RR catalysts. The catalysts were synthesized using a simple co-precipitation method employing sodium carbonate solutions with different pH and synthesis temperatures. The elemental ratio of Cu and Al, and sheet size were controlled. The most active Cu-Al/LDH showed a faradaic efficiency for CO generation of 42 % and one for formate generation of 22 % at the current density of 50 mA using a gas diffusion electrode system under galvanostatic conditions. Our result indicates that the sheet size of the LDH sheet is a critical parameter for determining CO2 RR activity.
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Affiliation(s)
- Kazuyuki Iwase
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
| | - Tomo Hirano
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
| | - Itaru Honma
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
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