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Nandan R, Nara H, Nam HN, Phung QM, Ngo QP, Na J, Henzie J, Yamauchi Y. Tailored Design of Mesoporous Nanospheres with High Entropic Alloy Sites for Efficient Redox Electrocatalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402518. [PMID: 39031636 DOI: 10.1002/advs.202402518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 06/13/2024] [Indexed: 07/22/2024]
Abstract
High Entropy Alloys (HEAs) are a versatile material with unique properties, tailored for various applications. They enable pH-sensitive electrocatalytic transformations like hydrogen evolution reaction (HER) and hydrogen oxidation reactions (HOR) in alkaline media. Mesoporous nanostructures with high surface area are preferred for these electrochemical reactions, but designing mesoporous HEA sis challenging. To overcome this challenge, a low-temperature triblock copolymer-assisted wet-chemical approach is developed to produce mesoporous HEA nanospheres composed of PtPdRuMoNi systems with sufficient entropic mixing. Owing to active sites with inherent entropic effect, mesoporous features, and increased accessibility, optimized HEA nanospheres promote strong HER/HOR performance in alkaline medium. At 30 mV nominal overpotential, it exhibits a mass activity of ≈167 (HER) and 151 A gPt -1 (HOR), far exceeding commercial Pt-C electrocatalysts (34 and 48 A gPt -1) and many recently reported various alloys. The Mott-Schottky analysis reveals HEA nanospheres inherit high charge carrier density, positive flat band potential, and smaller charge transfer barrier, resulting in better activity and faster kinetics. This micelle-assisted synthetic enable the exploration of the compositional and configurational spaces of HEAs at relatively low temperature, while simultaneously facilitating the introduction of mesoporous nanostructures for a wide range of catalytic applications.
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Affiliation(s)
- Ravi Nandan
- Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Hiroki Nara
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo, 169-8555, Japan
| | - Ho Ngoc Nam
- Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan
| | - Quan Manh Phung
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8602, Japan
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan
| | - Quynh Phuong Ngo
- Materials Architecturing Research Center, Korea Institute of Science and Technology (KIST), 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Jongbeom Na
- Materials Architecturing Research Center, Korea Institute of Science and Technology (KIST), 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul, 02792, Republic of Korea
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul, 02447, Republic of Korea
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Joel Henzie
- Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Yusuke Yamauchi
- Research Center for Materials Nanoarchitectonics, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, 4072, Australia
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Republic of Korea
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Jiao T, Kim BS, Guo P, Li B. Self-Assembled Nanocomposites and Nanostructures for Environmental and Energic Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:220. [PMID: 36677973 PMCID: PMC9866243 DOI: 10.3390/nano13020220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
With the rapid development of nanotechnology, nanocomposites and nanostructures have attracted significant attention due to their unique physical and chemical properties and variable functionalities [...].
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Affiliation(s)
- Tifeng Jiao
- School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Byoung-Suhk Kim
- Department of Organic Materials & Fiber Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Republic of Korea
| | - Peizhi Guo
- Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
| | - Bingbing Li
- Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA
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Nandan R, Raj G, Nanda KK. FeCoNiMnCr High-Entropy Alloy Nanoparticle-Grafted NCNTs with Promising Performance in the Ohmic Polarization Region of Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2022; 14:16108-16116. [PMID: 35357120 DOI: 10.1021/acsami.1c21336] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We report a user-friendly methodology for the successful designing of targeted single-phased face-centered cubic (fcc) FeCoNiMnCr high-entropy alloy (HEA) nanoparticle-grafted N-doped carbon nanotubes (CNTs). The nanostructure assimilates the advantages of N-doped carbon and HEA nanoparticles as a core for the efficient promotion of electrochemical oxygen reduction reaction (ORR). It emulates the commercial Pt-C electrocatalyst for ORR and shows promise for better performance in the Ohmic polarization region of fuel cells. In addition, it ensures superior efficacy over those of numerous recently reported transition metal-based traditional alloy composites for ORR. The presented methodology has the potential to pave the way for the effective designing of a variety of targeted HEA systems with ease, which is necessary to widen the domain of HEA for numerous applications.
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Affiliation(s)
- Ravi Nandan
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Gokul Raj
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Karuna K Nanda
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
- Institute of Physics, Bhubaneshwar 751005, India
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Zhou X, Zhao X, Gu S, Gao K, Xie F, Wang X, Tang Z. A novel sensitive ACNTs-MoO 2 SERS substrate boosted by synergistic enhancement effect. Phys Chem Chem Phys 2021; 23:20645-20653. [PMID: 34515272 DOI: 10.1039/d1cp03174k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Integrating chemical enhancement (CM) and electromagnetic enhancement (EM) into one substrate is of great significance, but as far as we know, little research has been done on this project. In this paper, the novel bead chain like acidified carbon nanotubes-MoO2 (ACNTs-M) were designed by a simple two-step hydrothermal synthesis method. Benefitting from a good adsorption capacity, chemical enhancement and surface electromagnetic field enhancement effect, ACNTs-M exhibits a stunning SERS performance. The maximum enhancement factor (EF) of 5.13 × 107 is obtained with R6G molecules on ACNTs-M. The limit of detection (LOD) of R6G is 10-10 M. In addition, ACNTs-M also exhibits SERS sensitivity of other organic dyes (CV, RhB and MB). The results of Raman signal enhancement mechanism research verified that the synergy of CM and EM is the reason for the high SERS sensitivity of ACNTs-M. We believe that our work may bring cutting edge of development of stable and highly sensitive nonmetal SERS substrates.
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Affiliation(s)
- Xiaoyu Zhou
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui, 230601, China.
| | - Xiaoli Zhao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Shuo Gu
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui, 230601, China.
| | - Kaiyue Gao
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui, 230601, China.
| | - Fazhi Xie
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui, 230601, China.
| | - Xiufang Wang
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui, 230601, China.
| | - Zhi Tang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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Nandan R, Pandey P, Gautam A, Bisen OY, Chattopadhyay K, Titirici MM, Nanda KK. Atomic Arrangement Modulation in CoFe Nanoparticles Encapsulated in N-Doped Carbon Nanostructures for Efficient Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2021; 13:3771-3781. [PMID: 33438991 DOI: 10.1021/acsami.0c16937] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The properties and, hence, the application of materials are dependent on the way their constituent atoms are arranged. Here, we report a facile approach to produce body-centered cubic (bcc) and face-centered cubic (fcc) phases of bimetallic FeCo crystalline nanoparticles embedded into nitrogen-doped carbon nanotubes (NCNTs) with equal loading and almost similar particle size for both crystalline phases by a rational selection of precursors. The two electrocatalysts with similar composition but different crystalline structures of the encapsulated nanoparticles have allowed us, for the first time, to account for the effect of crystal structure on the overall work function of electrocatalysts and the concomitant correlation with the oxygen reduction reaction (ORR). This study unveils that the electrocatalysts with lower work function show lower activation energy to facilitate the ORR. Importantly, the difference between the ORR activation energy on electrocatalysts and their respective work functions are found to be identical (∼0.2 eV). A notable decrease in the ORR activity after acid treatment indicates the significant role of encapsulated FeCo nanoparticles in influencing the oxygen electrochemistry by modulating the material property of overall electrocatalysts.
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Affiliation(s)
- Ravi Nandan
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - Prafull Pandey
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Ajay Gautam
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
| | | | - Kamanio Chattopadhyay
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
- Interdisciplinary Centre for Energy Research, Indian Institute of Science, Bangalore 560012, India
| | | | - Karuna Kar Nanda
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India
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Barman BK, Sarkar B, Nandan R, Nanda KK. Ruthenium nanodendrites on reduced graphene oxide: an efficient water and 4-nitrophenol reduction catalyst. NEW J CHEM 2021. [DOI: 10.1039/d0nj05565d] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A green and efficient protocol is reported for the elegant design of reduced graphene oxide (rGO)-supported Ru nanodendrites for promotion of electrochemical water reduction in a wide pH range as well as for environmental remediation.
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Affiliation(s)
- Barun Kumar Barman
- Materials Research Centre
- Indian Institute of Science
- Bangalore-560012
- India
| | - Bidushi Sarkar
- Materials Research Centre
- Indian Institute of Science
- Bangalore-560012
- India
| | - Ravi Nandan
- Materials Research Centre
- Indian Institute of Science
- Bangalore-560012
- India
| | - Karuna Kar Nanda
- Materials Research Centre
- Indian Institute of Science
- Bangalore-560012
- India
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