1
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To-A-Ran W, Mastoi NR, Ha CY, Song YJ, Kim YJ. Kelvin Probe Force Microscopy and Electrochemical Atomic Force Microscopy Investigations of Lithium Nucleation and Growth: Influence of the Electrode Surface Potential. J Phys Chem Lett 2024; 15:7265-7271. [PMID: 38978355 PMCID: PMC11261615 DOI: 10.1021/acs.jpclett.4c01148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 06/17/2024] [Accepted: 06/20/2024] [Indexed: 07/10/2024]
Abstract
Lithium metal is promising for high-capacity batteries because of its high theoretical specific capacity of 3860 mAh g-1 and low redox potential of -3.04 V versus the standard hydrogen electrode. However, it encounters challenges, such as dendrite formation, which poses risks of short circuits and safety hazards. This study examines Li deposition using electrochemical atomic force microscopy (EC-AFM) and Kelvin probe force microscopy (KPFM). KPFM provides insights into local surface potential, while EC-AFM captures the surface response evolution to electrochemical reactions. We selectively removed metallic coatings from current collectors to compare lithium deposition on coated and exposed copper surfaces. Observations from the Ag-coated Cu (Ag/Cu), Pt-coated Cu (Pt/Cu), and Au-coated Cu (Au/Cu) samples revealed variations in lithium deposition. Ag/Cu and Au/Cu exhibited two-dimensional growth, whereas Pt/Cu exhibited three-dimensional growth, highlighting the impact of electrode materials on morphology. These insights advance the development of safer lithium metal batteries.
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Affiliation(s)
- Weerawat To-A-Ran
- SKKU
Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 16419, Republic
of Korea
- Department
of Nano Science and Technology, Sungkyunkwan
University, Suwon 16419, Republic of Korea
| | - Naila Riaz Mastoi
- SKKU
Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 16419, Republic
of Korea
- Department
of Nano Science and Technology, Sungkyunkwan
University, Suwon 16419, Republic of Korea
| | - Chae Yeon Ha
- SKKU
Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 16419, Republic
of Korea
- Department
of Nano Science and Technology, Sungkyunkwan
University, Suwon 16419, Republic of Korea
| | - Young Jae Song
- SKKU
Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 16419, Republic
of Korea
- Department
of Nano Science and Technology, Sungkyunkwan
University, Suwon 16419, Republic of Korea
- Department
of Nano Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Young-Jun Kim
- SKKU
Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 16419, Republic
of Korea
- Department
of Nano Science and Technology, Sungkyunkwan
University, Suwon 16419, Republic of Korea
- Department
of Nano Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- SKKU
Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon 16419, Republic
of Korea
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2
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Cho J, Medina A, Saih I, Il Choi J, Drexler M, Goddard WA, Alamgir FM, Jang SS. 2D Metal/Graphene and 2D Metal/Graphene/Metal Systems for Electrocatalytic Conversion of CO 2 to Formic Acid. Angew Chem Int Ed Engl 2024; 63:e202320268. [PMID: 38271278 DOI: 10.1002/anie.202320268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Accepted: 01/24/2024] [Indexed: 01/27/2024]
Abstract
Efficiently transforming CO2 into renewable energy sources is crucial for decarbonization efforts. Formic acid (HCOOH) holds great promise as a hydrogen storage compound due to its high hydrogen density, non-toxicity, and stability under ambient conditions. However, the electrochemical reduction of CO2 (CO2 RR) on conventional carbon black-supported metal catalysts faces challenges such as low stability through dissolution and agglomeration, as well as suffering from high overpotentials and the necessity to overcome the competitive hydrogen evolution reaction (HER). In this study, we modify the physical/chemical properties of metal surfaces by depositing metal monolayers on graphene (M/G) to create highly active and stable electrocatalysts. Strong covalent bonding between graphene and metal is induced by the hybridization of sp and d orbitals, especially the sharpd z 2 ${{d}_{{z}^{2}}}$ ,d y z ${{d}_{yz}}$ , andd x z ${{d}_{xz}}$ orbitals of metals near the Fermi level, playing a decisive role. Moreover, charge polarization on graphene in M/G enables the deposition of another thin metallic film, forming metal/graphene/metal (M/G/M) structures. Finally, evaluating overpotentials required for CO2 reduction to HCOOH, CO, and HER, we find that Pd/G, Pt/G/Ag, and Pt/G/Au exhibit excellent activity and selectivity toward HCOOH production. Our novel 2D hybrid catalyst design methodology may offer insights into enhanced electrochemical reactions through the electronic mixing of metal and other p-block elements.
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Affiliation(s)
- Jinwon Cho
- School of materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr., Atlanta, GA 30332-0245, USA
| | - Arturo Medina
- School of materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr., Atlanta, GA 30332-0245, USA
| | - Ines Saih
- School of materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr., Atlanta, GA 30332-0245, USA
| | - Ji Il Choi
- School of materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr., Atlanta, GA 30332-0245, USA
| | - Matthew Drexler
- School of materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr., Atlanta, GA 30332-0245, USA
| | - William A Goddard
- Materials and Process Simulation Center, California Institute of Technology, Pasadena, CA 91125, USA
| | - Faisal M Alamgir
- School of materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr., Atlanta, GA 30332-0245, USA
| | - Seung Soon Jang
- School of materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Dr., Atlanta, GA 30332-0245, USA
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3
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Abdelhafiz A, Choi JI, Zhao B, Cho J, Ding Y, Soule L, Jang SS, Liu M, Alamgir FM. Catalysis Sans Catalyst Loss: The Origins of Prolonged Stability of Graphene-Metal-Graphene Sandwich Architecture for Oxygen Reduction Reactions. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2304616. [PMID: 37863808 DOI: 10.1002/advs.202304616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 09/01/2023] [Indexed: 10/22/2023]
Abstract
Over the past decades, the design of active catalysts has been the subject of intense research efforts. However, there has been significantly less deliberate emphasis on rationally designing a catalyst system with a prolonged stability. A major obstacle comes from the ambiguity behind how catalyst degrades. Several degradation mechanisms are proposed in literature, but with a lack of systematic studies, the causal relations between degradation and those proposed mechanisms remain ambiguous. Here, a systematic study of a catalyst system comprising of small particles and single atoms of Pt sandwiched between graphene layers, GR/Pt/GR, is studied to unravel the degradation mechanism of the studied electrocatalyst for oxygen reduction reaction(ORR). Catalyst suffers from atomic dissolution under ORR harsh acidic and oxidizing operation voltages. Single atoms trapped in point defects within the top graphene layer on their way hopping through toward the surface of GR/Pt/GR architecture. Trapping mechanism renders individual Pt atoms as single atom catalyst sites catalyzing ORR for thousands of cycles before washed away in the electrolyte. The GR/Pt/GR catalysts also compare favorably to state-of-the-art commercial Pt/C catalysts and demonstrates a rational design of a hybrid nanoarchitecture with a prolonged stability for thousands of operation cycles.
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Affiliation(s)
- Ali Abdelhafiz
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, 77 Mass Ave, Cambridge, MA, 02139, USA
| | - Ji Il Choi
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA, 30332, USA
| | - Bote Zhao
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA, 30332, USA
| | - Jinwon Cho
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA, 30332, USA
| | - Yong Ding
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA, 30332, USA
| | - Luke Soule
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA, 30332, USA
| | - Seung Soon Jang
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA, 30332, USA
| | - Meilin Liu
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA, 30332, USA
| | - Faisal M Alamgir
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, GA, 30332, USA
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4
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Hong Y, Venkateshalu S, Jeong S, Tomboc GM, Jo J, Park J, Lee K. Galvanic replacement reaction to prepare catalytic materials. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yongju Hong
- Department of Chemistry and Research Institute for Natural Sciences Korea University Seoul Republic of Korea
| | - Sandhya Venkateshalu
- Department of Chemistry and Research Institute for Natural Sciences Korea University Seoul Republic of Korea
| | - Sangyeon Jeong
- Department of Chemistry and Research Institute for Natural Sciences Korea University Seoul Republic of Korea
| | - Gracita M. Tomboc
- Green Hydrogen Lab (GH2Lab) Institute for Hydrogen Research (IHR), Université du Québec à Trois−Rivières (UQTR) Québec Canada
| | - Jinhyoung Jo
- Department of Chemistry and Research Institute for Natural Sciences Korea University Seoul Republic of Korea
| | - Jongsik Park
- Department of Chemistry Kyonggi University Suwon Republic of Korea
| | - Kwangyeol Lee
- Department of Chemistry and Research Institute for Natural Sciences Korea University Seoul Republic of Korea
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5
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Mechanism of oxygen reduction reaction on Ni/CNTs and Ni/X-CNTs (X=B, N, O) catalysts: a theoretical study. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02888-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Patsay I, Maizelis Z, Maizelis A. Nonlinear Potential Scanning as a Novel Approach to Calculation of the Time Variable Galvanic Displacement Reaction Rate. ChemElectroChem 2022. [DOI: 10.1002/celc.202101274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ihor Patsay
- Lʹvìvsʹkij nacìonalʹnij unìversitet ìmenì Ìvana Franka: L'vivs'kij nacional'nij universitet imeni Ivana Franka Department of Analytical Chemistry UKRAINE
| | - Zakhar Maizelis
- Institut radiofiziki ta elektroniki imeni O A Usikova Nacional'na akademia nauk Ukraini Solid State Physics UKRAINE
| | - Antonina Maizelis
- National Technical University "Kharkiv Polytechnic Institute" Technical Electrochemistry Kyrpychova Str. 2 61002 Kharkiv UKRAINE
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7
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Ge Y, Wang X, Huang B, Huang Z, Chen B, Ling C, Liu J, Liu G, Zhang J, Wang G, Chen Y, Li L, Liao L, Wang L, Yun Q, Lai Z, Lu S, Luo Q, Wang J, Zheng Z, Zhang H. Seeded Synthesis of Unconventional 2H-Phase Pd Alloy Nanomaterials for Highly Efficient Oxygen Reduction. J Am Chem Soc 2021; 143:17292-17299. [PMID: 34613737 DOI: 10.1021/jacs.1c08973] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Crystal phase engineering of noble-metal-based alloy nanomaterials paves a new way to the rational synthesis of high-performance catalysts for various applications. However, the controlled preparation of noble-metal-based alloy nanomaterials with unconventional crystal phases still remains a great challenge due to their thermodynamically unstable nature. Herein, we develop a robust and general seeded method to synthesize PdCu alloy nanomaterials with unconventional hexagonal close-packed (hcp, 2H type) phase and also tunable Cu contents. Moreover, galvanic replacement of Cu by Pt can be further conducted to prepare unconventional trimetallic 2H-PdCuPt nanomaterials. Impressively, 2H-Pd67Cu33 nanoparticles possess a high mass activity of 0.87 A mg-1Pd at 0.9 V (vs reversible hydrogen electrode (RHE)) in electrochemical oxygen reduction reaction (ORR) under alkaline condition, which is 2.5 times that of the conventional face-centered cubic (fcc) Pd69Cu31 counterpart, revealing the important role of crystal phase on determining the ORR performance. After the incorporation of Pt, the obtained 2H-Pd71Cu22Pt7 catalyst shows a significantly enhanced mass activity of 1.92 A mg-1Pd+Pt at 0.9 V (vs RHE), which is 19.2 and 8.7 times those of commercial Pt/C and Pd/C, placing it among the best reported Pd-based ORR electrocatalysts under alkaline conditions.
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Affiliation(s)
- Yiyao Ge
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Xixi Wang
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Biao Huang
- Department of Chemistry, City University of Hong Kong, Hong Kong, China.,Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
| | - Zhiqi Huang
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Bo Chen
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Chongyi Ling
- School of Physics, Southeast University, Nanjing 211189, China
| | - Jiawei Liu
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Guanghua Liu
- State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Jie Zhang
- State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Gang Wang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Ye Chen
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Lujiang Li
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Lingwen Liao
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Lei Wang
- Laboratory for Advanced Interfacial Materials and Devices, Institution of Textiles and Clothing, Research Institute for Smart Energy, & Research Institute of Intelligent Wearable Systems, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Qinbai Yun
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Zhuangchai Lai
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Shiyao Lu
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Qinxin Luo
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Jinlan Wang
- School of Physics, Southeast University, Nanjing 211189, China
| | - Zijian Zheng
- Laboratory for Advanced Interfacial Materials and Devices, Institution of Textiles and Clothing, Research Institute for Smart Energy, & Research Institute of Intelligent Wearable Systems, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Hua Zhang
- Department of Chemistry, City University of Hong Kong, Hong Kong, China.,Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China.,Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China
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8
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Xiao Z, Wu H, Zhong H, Abdelhafiz A, Zeng J. De-alloyed PtCu/C catalysts with enhanced electrocatalytic performance for the oxygen reduction reaction. NANOSCALE 2021; 13:13896-13904. [PMID: 34477663 DOI: 10.1039/d1nr02820k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In electrochemical reactions, interactions between reaction intermediates and catalytic surfaces control the catalytic activity, and thereby require to be optimized. Electrochemical de-alloying of mixed-metal nanoparticles is a promising strategy to modify catalysts' surface chemistry and/or induce lattice strain to alter their electronic structure. Perfect design of the electrochemical de-alloying strategy to modify the catalyst's d-band center position can yield significant improvement on the catalytic performance of the oxygen reduction reaction (ORR). Herein, carbon supported PtCu catalysts are prepared by a simple polyol method followed by an electrochemical de-alloying treatment to form PtCu/C catalysts with a Pt-enriched porous shell with improved catalytic activity. Although the pristine PtCu/C catalyst exhibits a mass activity of 0.64 A mg-1Pt, the dissolution of Cu atoms from the catalyst surface after electrochemical de-alloying cycling leads to a significant enhancement in mass activity (1.19 A mg-1Pt), which is 400% better than that of state-of-the-art commercial Pt/C (0.24 A mg-1Pt). Furthermore, the de-alloyed PtCu/C-10 catalyst with a Pt-enriched shell delivers prolonged stability (loss of only 28.6% after 30 000 cycles), which is much better than that of Pt/C with a loss of 45.8%. By virtue of scanning transmission electron microscopy and elemental mapping experiments, the morphology and composition evolution of the catalysts could clearly be elucidated. This work helps in drawing a roadmap to design highly active and stable catalyst platforms for the ORR and relevant proton exchange membrane fuel cell applications.
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Affiliation(s)
- Zhuojie Xiao
- School of Chemistry and Chemical Engineering, South China University of Technology; Guangdong Key Lab for Fuel Cell Technology, Guangzhou 510641, China.
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9
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Curcuma longa Mediated Synthesis of Copper Oxide, Nickel Oxide and Cu-Ni Bimetallic Hybrid Nanoparticles: Characterization and Evaluation for Antimicrobial, Anti-Parasitic and Cytotoxic Potentials. COATINGS 2021. [DOI: 10.3390/coatings11070849] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nanoparticles have long been known and their biomedical potent activities have proven that these can provide an alternative to other drugs. In the current study, copper oxide, nickel oxide and copper/nickel hybrid NPs were biosynthesized by using Curcuma longa root extracts as a reducing and capping agent, followed by characterization via UV-spectroscopy, Fourier transformed infrared spectroscopy (FTIR), energy dispersive X-ray (EDX), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermo galvanometric analysis (TGA), and band gap. FTIR spectroscopy shows the availability of various functional groups and biomolecules such as carbohydrate, protein, polysaccharides, etc. The EDX peak confirmed that the elemental nickel and copper were present in large quantity in the analyzed sample. Scanning electron micrographs showed that the synthesized CuO-NPs and NiO-NPs were polyhedral uniform and homogeneous in morphology, while the copper/nickel hybrid NPs were well dispersed, spherical in shape, and uniform in size. TEM micrographs of CuO-NPs had 27.72 nm, NiO had 23.13 nm and, for their hybrid, the size was 17.38 nm, which was confirmed respectively. The CuO and NiO NPs possessed spherical- to multi-headed shapes, while their hybrid showed a complete spherical shape, small size, and polydispersed NPs. The XRD spectra revealed that the average particle size for CuO, NiO, and hybrid were 29.7 nm, 28 nm and 27 nm, respectively. Maximum anti-diabetic inhibition of (52.35 ± 0.76: CuO-NPs, 68.1 ± 0.93: NiO-NPs and 74.23 ± 0.42: Cu + Ni hybrids) for α-amylase and (39.25 ± 0.18 CuO-NPs, 52.35 ± 1.32: NiO-NPs and 62.32 ± 0.48: Cu + Ni hybrids) for α-glucosidase were calculated, respectively, at 400 µg/mL. The maximum antioxidants capacity was observed as 65.1 ± 0.83 μgAAE/mg for Cu-Ni hybrids, 58.39 ± 0.62 μgAAE/mg for NiO-NPs, and 52.2 ± 0.31 μgAAE/mg for CuO-NPs, respectively, at 400 μg/mL. The highest antibacterial activity of biosynthesized NPs was observed against P. aeuroginosa (28 ± 1.22) and P. vulgaris (25 ± 1.73) for Cu + Ni hybrids, respectively. Furthermore, the antibiotics were coated with NPs, and activity was noted. Significant anti-leishmanial activity of 60.5 ± 0.53 and 68.4 ± 0.59 for Cu + Ni hybrids; 53.2 ± 0.48 and 61.2 ± 0.44 for NiO-NPs; 49.1 ± 0.39 and 56.2 ± 0.45 for CuO-NPs at 400 μg/mL were recorded for promastigote and amastigotes, respectively. The biosynthesized NPs also showed significant anti-cancerous potential against HepG2 cell lines. It was concluded from the study that NPs are potential agents to be used as an alternative to antimicrobial agents.
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10
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Ashraf G, Asif M, Aziz A, Iftikhar T, Liu H. Rice-Spikelet-like Copper Oxide Decorated with Platinum Stranded in the CNT Network for Electrochemical In Vitro Detection of Serotonin. ACS APPLIED MATERIALS & INTERFACES 2021; 13:6023-6033. [PMID: 33496593 DOI: 10.1021/acsami.0c20645] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The specific monitoring of serotonin (ST) has provoked massive interest in therapeutic and biological science since it has been recognized as the third most significant endogenous gastrointestinal neurotransmitter. Hence, there is a great need to develop a sensitive and low-cost sensing platform for the detection of a clinically relevant ST level in biological matrices. Herein, we develop a simple two-step approach for an ultrasensitive electrochemical (EC) sensor with the Cu2O metal oxide (MO)-incorporated CNT core that has been further deposited with a transitional amount of platinum nanoparticles (Pt NPs). We presented, for the first time, the deposition of Pt NPs on the (CNTs-Cu2O-CuO) nanopetal composite via the galvanic replacement method, where copper not only acts as a reductant but a sacrificial template as well. The electrocatalytic aptitude of the fabricated EC sensing platform has been assessed for the sensitive detection of ST as a proficient biomarker in early disease diagnostics. The synergy of improved active surface area, remarkable conductivity, polarization effect induced by Pt NPs on CNTs-Cu2O-CuO nanopetals, fast electron transfer, and mixed-valence states of copper boost up the redox processes at the electrode-analyte junction. The CNTs-Cu2O-CuO@Pt-modified electrode has unveiled outstanding electrocatalytic capabilities toward ST oxidation in terms of a low detection limit of 3 nM (S/N = 3), wide linear concentration range, reproducibility, and incredible durability. Owing to the amazing proficiency, the proposed EC sensor based on the CNTs-Cu2O-CuO@Pt heterostructure has been applied for ST detection in biotic fluids and real-time tracking of ST efflux released from various cell lines as early disease diagnostic approaches.
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Affiliation(s)
- Ghazala Ashraf
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Muhammad Asif
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
| | - Ayesha Aziz
- Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | - Tayyaba Iftikhar
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
| | - Hongfang Liu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
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11
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Song J, Zhong H, Wu H, Xiao Z, Song H, Shu T, Zeng J. Robust and Efficient Pd–Cu Bimetallic Catalysts with Porous Structure for Formic Acid Oxidation and a Mechanistic Study of Electrochemical Dealloying. Electrocatalysis (N Y) 2021. [DOI: 10.1007/s12678-020-00632-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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12
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13
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Kim JM, Kim JH, Kim J, Lim Y, Kim Y, Alam A, Lee J, Ju H, Ham HC, Kim JY. Synergetic Structural Transformation of Pt Electrocatalyst into Advanced 3D Architectures for Hydrogen Fuel Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002210. [PMID: 32989883 DOI: 10.1002/adma.202002210] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/16/2020] [Indexed: 06/11/2023]
Abstract
A new direction for developing electrocatalysts for hydrogen fuel cell systems has emerged, based on the fabrication of 3D architectures. These new architectures include extended Pt surface building blocks, the strategic use of void spaces, and deliberate network connectivity along with tortuosity, as design components. Various strategies for synthesis now enable the functional and structural engineering of these electrocatalysts with appropriate electronic, ionic, and electrochemical features. The new architectures provide efficient mass transport and large electrochemically active areas. To date, although there are few examples of fully functioning hydrogen fuel cell devices, these 3D electrocatalysts have the potential to achieve optimal cell performance and durability, exceeding conventional Pt powder (i.e., Pt/C) electrocatalysts. This progress report highlights the various 3D architectures proposed for Pt electrocatalysts, advances made in the fabrication of these structures, and the remaining technical challenges. Attempts to develop design rules for 3D architectures and modeling, provide insights into their achievable and potential performance. Perspectives on future developments of new multiscale designs are also discussed along with future study directions.
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Affiliation(s)
- Jong Min Kim
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Materials Architecturing Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Joo-Hyung Kim
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- School of Materials Science and Engineering, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Jun Kim
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Youngjoon Lim
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Yongmin Kim
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
| | - Afroz Alam
- Department of Mechanical Engineering, Inha University, Incheon, 22212, Republic of Korea
| | - Jaeseung Lee
- Department of Mechanical Engineering, Inha University, Incheon, 22212, Republic of Korea
| | - Hyunchul Ju
- Department of Mechanical Engineering, Inha University, Incheon, 22212, Republic of Korea
| | - Hyung Chul Ham
- Department of Chemical Engineering, Inha University, Incheon, 22212, Republic of Korea
| | - Jin Young Kim
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea
- Graduate School of Energy and Environment (KU-KIST Green School), Korea University, Seoul, 02841, Republic of Korea
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Guo Y, Pan F, Chen W, Ding Z, Yang D, Li B, Ming P, Zhang C. The Controllable Design of Catalyst Inks to Enhance PEMFC Performance: A Review. ELECTROCHEM ENERGY R 2020. [DOI: 10.1007/s41918-020-00083-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Abdelhafiz A, Zhao B, Xiao Z, Zeng J, Deng X, Lang L, Ding Y, Song H, Liu M. Facile Room-Temperature Synthesis of a Highly Active and Robust Single-Crystal Pt Multipod Catalyst for Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49510-49518. [PMID: 32897685 DOI: 10.1021/acsami.0c06652] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Economical production of highly active and robust Pt catalysts on a large scale is vital to the broad commercialization of polymer electrolyte membrane fuel cells. Here, we report a low-cost, one-pot process for large-scale synthesis of single-crystal Pt multipods with abundant high-index facets, in an aqueous solution without any template or surfactant. A composite consisting of the Pt multipods (40 wt %) and carbon displays a specific activity of 0.242 mA/cm2 and a mass activity of 0.109 A/mg at 0.9 V (versus a reversible hydrogen electrode) for oxygen reduction reaction, corresponding to ∼124% and ∼100% enhancement compared with those of the state-of-the-art commercial Pt/C catalyst (0.108 mA/cm2 and 0.054 A/mg). The single-crystal Pt multipods also show excellent stability when tested for 4500 cycles in a potential range of 0.6-1.1 V and another 2000 cycles in 0-1.2 V. More importantly, the superior performance of the Pt multipods/C catalyst is also demonstrated in a membrane electrode assembly (MEA), achieving a power density of 774 mW/cm2 (1.29 A/cm2) at 0.6 V and a peak power density of ∼1 W/cm2, representing 34% and 20% enhancement compared with those of a MEA based on the state-of-the-art commercial Pt/C catalyst (576 and 834 mW/cm2).
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Affiliation(s)
- Ali Abdelhafiz
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332-0245, United States
| | - Bote Zhao
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332-0245, United States
| | - Zhuojie Xiao
- Guangdong Key Lab for Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Jianhuang Zeng
- Guangdong Key Lab for Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Xiang Deng
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332-0245, United States
| | - Leiming Lang
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332-0245, United States
| | - Yong Ding
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332-0245, United States
| | - Huiyu Song
- Guangdong Key Lab for Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Meilin Liu
- School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332-0245, United States
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Cao J, Cao H, Shen J, Wang F, Zhu H. Impact of CuFe bimetallic core on the electrocatalytic activity and stability of Pt shell for oxygen reduction reaction. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136205] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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