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Wang R, Lee JM. High-Energy Facet Engineering for Electrocatalytic Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401546. [PMID: 38705853 DOI: 10.1002/smll.202401546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 04/15/2024] [Indexed: 05/07/2024]
Abstract
The design of high-energy facets in electrocatalysts has attracted significant attention due to their potential to enhance electrocatalytic activity. In this review, the significance of high-energy facets in various electrochemical reactions are highlighted, including oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), nitrogen reduction reaction (NRR), and carbon dioxide reduction reaction (CRR). Their importance in various electrochemical reactions and present strategies for constructing high-energy facets are discussed, including alloying, heterostructure formation, selective etching, capping agents, and coupling with substrates. These strategies enable control over crystallographic orientation and surface morphology, fine-tuning electrocatalytic properties. This study also addresses future directions and challenges, emphasizing the need to better understand fundamental mechanisms. Overall, high-energy facets offer exciting opportunities for advancing electrocatalysis.
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Affiliation(s)
- Rui Wang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Jong-Min Lee
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
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Ahn H, Ahn H, Goo BS, Kwon Y, Kim Y, Wi DH, Hong JW, Lee S, Lee YW, Han SW. Freestanding Penta-Twinned Palladium Nanosheets. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401230. [PMID: 38698589 DOI: 10.1002/smll.202401230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 04/12/2024] [Indexed: 05/05/2024]
Abstract
Control over the morphology of nanomaterials to have a 2D structure and manipulating the surface strain of nanostructures through defect control have proved to be promising for developing efficient catalysts for sustainable chemical and energy conversion. Here a one-pot aqueous synthesis route of freestanding Pd nanosheets with a penta-twinned structure (PdPT NSs) is presented. The generation of the penta-twinned nanosheet structure can be succeeded by directing the anisotropic growth of Pd under the controlled reduction kinetics of Pd precursors. Experimental and computational investigations showed that the surface atoms of the PdPT NSs are effectively under a compressive environment due to the strain imposed by their twin boundary defects. Due to the twin boundary-induced surface strain as well as the 2D structure of the PdPT NSs, they exhibited highly enhanced electrocatalytic activity for oxygen reduction reaction compared to Pd nanosheets without a twin boundary, 3D Pd nanocrystals, and commercial Pd/C and Pt/C catalysts.
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Affiliation(s)
- Hojin Ahn
- Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Hochan Ahn
- Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Bon Seung Goo
- Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Yongmin Kwon
- Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Yonghyeon Kim
- Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Dae Han Wi
- Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
| | - Jong Wook Hong
- Department of Chemistry, University of Ulsan, Ulsan, 44610, South Korea
| | - Seunghoon Lee
- Department of Chemistry (BK21 FOUR Graduate Program), Dong-A University, Busan, 49315, South Korea
| | - Young Wook Lee
- Department of Chemistry Education and Research Institute of Natural Science, Gyeongsang National University, Jinju, 52828, South Korea
| | - Sang Woo Han
- Department of Chemistry and KI for the NanoCentury, KAIST, Daejeon, 34141, South Korea
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Zheng X, Wang B, Ren B, Wang Q, Lu S. Electronic Structure Effect of PtCo Alloy with Adjustable Compositions for Efficient Methanol Electrooxidation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38156439 DOI: 10.1021/acs.langmuir.3c03529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
Various efficient strategies have been developed to overcome the anodic electrocatalyst issue of methanol-based fuel cells owing to their complicated methanol electrooxidation mechanism. In this work, PtCo nanoparticles with adjustable compositions supported on multiwalled carbon nanotubes (Pt1Cox/MWCNTs) through the adsorbing-coating-annealing-etching route were synthesized. Compared with the Pt/C catalyst, Pt1Co3/MWCNTs exhibit better electrocatalytic MOR activity in both activity and durability. Notably, the electrochemical mass and specific activity of the as-prepared catalyst are 1.04 mA μg-1Pt and 2.18 mA cm-2, respectively, which are higher than those of the Pt/C catalyst. Moreover, the as-prepared sample revealed lower onset potential during the CO stripping test. Furthermore, the Pt1Co3/MWCNTs possess a lower current density decrease rate in chronoamperometry and cyclic durability tests. The enhancement of activity and stability of Pt1Co3/MWCNTs could be ascribed to their ordered morphological structure, the electronic interaction between MWCNTs and PtCo nanoparticles, and the suitable electronic structure effect between Pt/Co ratios. The concept of the catalyst design in this study offers a different guideline for constructing the novel methanol electrooxidation catalyst, which will accelerate the widespread fuel cell practical application.
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Affiliation(s)
- Xingqun Zheng
- College of Safety Engineering, Chongqing University of Science & Technology, Chongqing 401331, China
| | - Bin Wang
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, China
| | - Bingzhi Ren
- School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Qingmei Wang
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, Guizhou 550025, China
| | - Shun Lu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
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Gui R, Cheng H, Wang M, Tai X, Zhang H, Liu C, Cao X, Chen C, Ge M, Wang H, Zheng X, Chu W, Lin Y, Xie Y, Wu C. Symmetry-Induced Regulation of Pt Strain Derived from Pt 3 Ga Intermetallic for Boosting Oxygen Reduction Reaction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2307661. [PMID: 37994613 DOI: 10.1002/adma.202307661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/19/2023] [Indexed: 11/24/2023]
Abstract
Pt-based fuel cell catalysts with excellent activity and stability for proton-exchange membrane fuel cells (PEMFCs) have been developed through strain regulation in recent years. Herein, this work demonstrates that symmetry-induced strain regulation of Pt surface of PtGa intermetallic compounds can greatly enhance the catalytic performance of the oxygen reduction reaction (ORR). With the strain environment varies derived from the lattice mismatch of analogous PtGa core but different symmetry, the Pt surface of the PtGa alloy and the Pt3 Ga (Pm3 ¯ $\bar{3}$ m) precisely realize 0.58% and 2.7% compressive strain compared to the Pt3 Ga (P4/mmm). Experimental and theoretical results reveal that when the compressive stress of the Pt lattice increases, the desorption process of O* intermediates becomes accelerated, which is conducive to oxygen reduction. The Pt3 Ga (Pm3 ¯ $\bar{3}$ m) with high symmetry and compressive Pt surface exhibit the highest mass and specific activities of 2.18 A mgPt -1 and 5.36 mA cm-2 , respectively, which are more than one order of magnitude higher than those of commercial Pt/C catalysts. This work demonstrates that material symmetry can be used to precisely modulate Pt surface stress to enhance the ORR, as well as provide a distinct platform to investigate the relationship between Pt compressibility and catalytic activity.
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Affiliation(s)
- Renjie Gui
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Han Cheng
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Minghao Wang
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xiaolin Tai
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Huijuan Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Congyan Liu
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xuemin Cao
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Chen Chen
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Min Ge
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Huijuan Wang
- Experimental Center of Engineering and Material Science, University of Science and Technology of China, Hefei, 230026, China
| | - Xusheng Zheng
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Wangsheng Chu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, China
| | - Yue Lin
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yi Xie
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, China
| | - Changzheng Wu
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, China
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Pramadewandaru RK, Lee YW, Hong JW. Synergistic effect of bimetallic Pd-Pt nanocrystals for highly efficient methanol oxidation electrocatalysts. RSC Adv 2023; 13:27046-27053. [PMID: 37693086 PMCID: PMC10486200 DOI: 10.1039/d3ra04837c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 08/25/2023] [Indexed: 09/12/2023] Open
Abstract
Metal nanocrystals (NCs) with controlled compositional and distributional structures have gained increasing attention due to their unique properties and broad applications, particularly in fuel cell systems. However, despite the significant importance of composition in metal NCs and their electrocatalytic behavior, comprehensive investigations into the relationship between atomic distribution and electrocatalytic activity remain scarce. In this study, we present the development of four types of nanocubes with similar sizes and controlled compositions (Pd-Pt alloy, Pd@Pt core-shell, Pd, and Pt) to investigate their influence on electrocatalytic performance for methanol oxidation reaction (MOR). The electrocatalytic activity and stability of these nanocubes exhibited variations based on their compositional structures, potentially affecting the interaction between the surface-active sites of the nanocrystals and reactive molecules. As a result, leveraging the synergistic effect of their alloy nanostructure, the Pd-Pt alloy nanocubes exhibited exceptional performance in MOR, surpassing the catalytic activity of other nanocubes, including Pd@Pt core-shell nanocubes, monometallic Pd and Pt nanocubes, as well as commercial Pd/C and Pt/C catalysts.
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Affiliation(s)
| | - Young Wook Lee
- Department of Education Chemistry and Research Institute of Natural Sciences, Gyeongsang National University Jinju 52828 Republic of Korea
| | - Jong Wook Hong
- Department of Chemistry, University of Ulsan Ulsan 44776 Republic of Korea
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Wang Z, Chen S, Wu W, Chen R, Zhu Y, Jiang H, Yu L, Cheng N. Tailored Lattice Compressive Strain of Pt-Skins by the L1 2 -Pt 3 M Intermetallic Core for Highly Efficient Oxygen Reduction. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2301310. [PMID: 37196181 DOI: 10.1002/adma.202301310] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/07/2023] [Indexed: 05/19/2023]
Abstract
The sluggish kinetics of oxygen reduction reaction (ORR) and unsatisfactory durability of Pt-based catalysts are severely hindering the commercialization of proton-exchange-membrane fuel cells (PEMFCs). In this work, the lattice compressive strain of Pt-skins imposed by Pt-based intermetallic cores is tailored for highly effective ORR through the confinement effect of the activated nitrogen-doped porous carbon (a-NPC). The modulated pores of a-NPC not only promote Pt-based intermetallics with ultrasmall size (average size of <4 nm), but also efficiently stabilizes intermetallic nanoparticles and sufficient exposure of active sites during the ORR process. The optimized catalyst (L12 -Pt3 Co@ML-Pt/NPC10 ) achieves excellent mass activity (1.72 A mgPt -1 ) and specific activity (3.49 mA cmPt -2 ), which are 11- and 15-fold that of commercial Pt/C, respectively. Besides, owing to the confinement effect of a-NPC and protection of Pt-skins, L12 -Pt3 Co@ML-Pt/NPC10 retains 98.1% mass activity after 30 000 cycles, and even 95% for 100 000 cycles, while Pt/C retains only 51.2% for 30 000 cycles. Rationalized by density functional theory, compared with other metals (Cr, Mn, Fe, and Zn), L12 -Pt3 Co closer to the top of "volcano" induces a more suitable compressive strain and electronic structure on Pt-skin, leading to an optimal oxygen adsorption energy and a remarkable ORR performance.
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Affiliation(s)
- Zichen Wang
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Suhao Chen
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Wei Wu
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Runzhe Chen
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Yu Zhu
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Haoran Jiang
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Liyue Yu
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Niancai Cheng
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
- Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, 510641, P. R. China
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7
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Gu BS, Dutta S, Hong YR, Ngome Okello OF, Im H, Ahn S, Choi SY, Woo Han J, Ryu S, Lee IS. Harmonious Heterointerfaces Formed on 2D-Pt Nanodendrites by Facet-Respective Stepwise Metal Deposition for Enhanced Hydrogen Evolution Reaction. Angew Chem Int Ed Engl 2023; 62:e202307816. [PMID: 37335309 DOI: 10.1002/anie.202307816] [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: 06/05/2023] [Revised: 06/18/2023] [Accepted: 06/19/2023] [Indexed: 06/21/2023]
Abstract
The performance of nanocrystal (NC) catalysts could be maximized by introducing rationally designed heterointerfaces formed by the facet- and spatio-specific modification with other materials of desired size and thickness. However, such heterointerfaces are limited in scope and synthetically challenging. Herein, we applied a wet chemistry method to tunably deposit Pd and Ni on the available surfaces of porous 2D-Pt nanodendrites (NDs). Using 2D silica nanoreactors to house the 2D-PtND, an 0.5-nm-thick epitaxial Pd or Ni layer (e-Pd or e-Ni) was exclusively formed on the flat {110} surface of 2D-Pt, while a non-epitaxial Pd or Ni layer (n-Pd or n-Ni) was typically deposited at the {111/100} edge in absence of nanoreactor. Notably, these differently located Pd/Pt and Ni/Pt heterointerfaces experienced distinct electronic effect to influence unequally in electrocatalytic synergy for hydrogen evolution reaction (HER). For instance, an enhanced H2 generation on the Pt{110} facet with 2D-2D interfaced e-Pd deposition and faster water dissociation on the edge-located n-Ni overpowered their facet-located counterparts in respective HER catalysis. Therefore, a feasible assembling of the valuable heterointerfaces in the optimal 2D n-Ni/e-Pd/Pt catalyst overcame the sluggish alkaline HER kinetics, with a catalytic activity 7.9 times higher than that of commercial Pt/C.
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Affiliation(s)
- Byeong Su Gu
- Center for Nanospace-confined Chemical Reactions (NCCR), Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Soumen Dutta
- Center for Nanospace-confined Chemical Reactions (NCCR), Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Yu-Rim Hong
- Center for Nanospace-confined Chemical Reactions (NCCR), Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Odongo Francis Ngome Okello
- Department of Materials Science & Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
- Current address: Samsung Electronics, Suwon, Korea
| | - Hyeonae Im
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Seungil Ahn
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Si-Young Choi
- Department of Materials Science & Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Jeong Woo Han
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - Sunmin Ryu
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
| | - In Su Lee
- Center for Nanospace-confined Chemical Reactions (NCCR), Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea
- Institute for Convergence Research and Education in Advanced Technology (I-CREATE), Yonsei University, Seoul, 03722, South Korea
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