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Luo L, Fu C, Guo Y, Cai X, Luo X, Tan Z, Xue R, Cheng X, Shen S, Zhang J. Ultrafine Core@Shell Cu 1Au 1@Cu 1Pd 3 Nanodots Synergized with 3D Porous N-Doped Graphene Nanosheets as a High-Performance Multifunctional Electrocatalyst. ACS NANO 2023; 17:2992-3006. [PMID: 36706226 DOI: 10.1021/acsnano.2c11627] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Rationally combining designed supports and metal-based nanomaterials is effective to synergize their respective physicochemical and electrochemical properties for developing highly active and stable/durable electrocatalysts. Accordingly, in this work, sub-5 nm and monodispersed nanodots (NDs) with the special nanostructure of an ultrafine Cu1Au1 core and a 2-3-atomic-layer Cu1Pd3 shell are synthesized by a facile solvothermal method, which are further evenly and firmly anchored onto 3D porous N-doped graphene nanosheets (NGS) via a simple annealing (A) process. The as-obtained Cu1Au1@Cu1Pd3 NDs/NGS-A exhibits exceptional electrocatalytic activity and noble-metal utilization toward the alkaline oxygen reduction, methanol oxidation, and ethanol oxidation reactions, showing dozens-fold enhancements compared with commercial Pd/C and Pt/C. Besides, it also has excellent long-term electrochemical stability and electrocatalytic durability. Advanced and comprehensive experimental and theoretical analyses unveil the synthetic mechanism of the special core@shell nanostructure and further reveal the origins of the significantly enhanced electrocatalytic performance: (1) the prominent structural properties of NGS, (2) the ultrasmall and monodispersed size as well as the highly uniform morphology of the NDs-A, (3) the special Cu-Au-Pd alloy nanostructure with an ultrafine core and a subnanometer shell, and (4) the strong metal-support interaction. This work not only develops a facile method for fabricating the special metal-based ultrafine-core@ultrathin-shell nanostructure but also proposes an effective and practical design paradigm of comprehensively and rationally considering both supports and metal-based nanomaterials for realizing high-performance multifunctional electrocatalysts, which can be further expanded to other supports and metal-based nanomaterials for other energy-conversion or environmental (electro)catalytic applications.
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Affiliation(s)
- Liuxuan Luo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Cehuang Fu
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Yangge Guo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Xiyang Cai
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Xiashuang Luo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Zehao Tan
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Rui Xue
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Xiaojing Cheng
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Shuiyun Shen
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
| | - Junliang Zhang
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai200240, People's Republic of China
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Gong Y, Liu H, Ke S, Zhuo L, Wang H. Latest advances in biomimetic nanomaterials for diagnosis and treatment of cardiovascular disease. Front Cardiovasc Med 2023; 9:1037741. [PMID: 36684578 PMCID: PMC9846151 DOI: 10.3389/fcvm.2022.1037741] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 12/09/2022] [Indexed: 01/05/2023] Open
Abstract
Cardiovascular disease remains one of the leading causes of death in China, with increasingly serious negative effects on people and society. Despite significant advances in preventing and treating cardiovascular diseases, such as atrial fibrillation/flutter and heart failure over the last few years, much more remains to be done. Therefore, developing innovative methods for identifying and managing cardiovascular disorders is critical. Nanomaterials provide multiple benefits in biomedicine, primarily better catalytic activity, drug loading, targeting, and imaging. Biomimetic materials and nanoparticles are specially combined to synthesize biomimetic nanoparticles that successfully reduce the nanoparticles' toxicity and immunogenicity while enhancing histocompatibility. Additionally, the biological targeting capability of nanoparticles facilitates the diagnosis and therapy of cardiovascular disease. Nowadays, nanomedicine still faces numerous challenges, which necessitates creating nanoparticles that are highly selective, toxic-free, and better clinically applicable. This study reviews the scientific accomplishments in this field over the past few years covering the classification, applications, and prospects of noble metal biomimetic nanozymes and biomimetic nanocarriers.
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Affiliation(s)
- Yuxuan Gong
- College of Life Sciences and Bioengineering, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing, China
| | - Huaying Liu
- College of Life Sciences and Bioengineering, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing, China
| | - Shen Ke
- College of Life Sciences and Bioengineering, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing, China
| | - Li Zhuo
- Department of Nephrology, China-Japan Friendship Hospital, Beijing, China,Li Zhuo,
| | - Haibin Wang
- College of Life Sciences and Bioengineering, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing, China,*Correspondence: Haibin Wang,
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Li Q, Zhang G, Yuan B, Zhong S, Ji Y, Liu Y, Wu X, Kong Q, Han J, He W. Core‐shell nanocatalysts with reduced platinum content toward more cost‐effective proton exchange membrane fuel cells. NANO SELECT 2022. [DOI: 10.1002/nano.202200111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Qun Li
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin China
| | - Guisheng Zhang
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin China
| | - Botao Yuan
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin China
| | - Shijie Zhong
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin China
| | - Yuanpeng Ji
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin China
- Chongqing Research Institute Harbin Institute of Technology Chongqing China
| | - Yuanpeng Liu
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin China
| | - Xiaoqiang Wu
- School of Mechanical Engineering Chengdu University Chengdu China
| | - Qingquan Kong
- School of Mechanical Engineering Chengdu University Chengdu China
| | - Jiecai Han
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin China
| | - Weidong He
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin China
- Chongqing Research Institute Harbin Institute of Technology Chongqing China
- School of Mechanical Engineering Chengdu University Chengdu China
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Zhao L, Cheng X, Luo L, Zheng Z, Shen S, Zhang J. Progress and prospects of low platinum oxygen reduction catalysts for proton exchange membrane fuel cells. CHINESE SCIENCE BULLETIN-CHINESE 2022. [DOI: 10.1360/tb-2021-0221] [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]
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Hua M, Tian X, Li S, Lin X. PdAg/Ag(111) Surface Alloys: A Highly Efficient Catalyst of Oxygen Reduction Reaction. NANOMATERIALS 2022; 12:nano12111802. [PMID: 35683658 PMCID: PMC9182455 DOI: 10.3390/nano12111802] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 05/22/2022] [Accepted: 05/23/2022] [Indexed: 02/01/2023]
Abstract
In this article, the behavior of various Pd ensembles on the PdAg(111) surfaces was systematically investigated for oxygen reduction reaction (ORR) intermediates using density functional theory (DFT) simulation. The Pd monomer on the PdAg(111) surface (with a Pd subsurface layer) has the best predicted performance, with a higher limiting potential (0.82 V) than Pt(111) (0.80 V). It could be explained by the subsurface coordination, which was also proven by the analysis of electronic properties. In this case, it is necessary to consider the influence of the near-surface layers when modeling the single-atom alloy (SAA) catalyst processes. Another important advantage of PdAg SAA is that atomic-dispersed Pd as adsorption sites can significantly improve the resistance to CO poisoning. Furthermore, by adjusting the Pd ensembles on the catalyst surface, an exciting ORR catalyst combination with predicted activity and high tolerance to CO poisoning can be designed.
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Influence of Degassing Treatment on the Ink Properties and Performance of Proton Exchange Membrane Fuel Cells. MEMBRANES 2022; 12:membranes12050541. [PMID: 35629867 PMCID: PMC9145345 DOI: 10.3390/membranes12050541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/07/2022] [Accepted: 05/09/2022] [Indexed: 11/26/2022]
Abstract
Degradation occurs in catalyst inks because of the catalytic oxidation of the solvent. Identification of the generation process of impurities and their effects on the properties of HSC ink and LSC ink is crucial in mitigating them. In this study, gas chromatography-mass spectrometry (GC-MS) and cyclic voltammetry (CV) showed that oxidation of NPA and EA was the primary cause of impurities such as acetic acid, aldehyde, propionic acid, propanal, 1,1-dipropoxypropane, and propyl propionate. After the degassing treatment, the degradation of the HSC ink was suppressed, and the concentrations of acetic acid, propionic acid, and propyl propionate plummeted from 0.0898 wt.%, 0.00224 wt.%, and 0.00046 wt.% to 0.0025 wt.%, 0.0126 wt.%, and 0.0003 wt.%, respectively. The smaller particle size and higher zeta potential in the degassed HSC ink indicated the higher utilization of Pt, thus leading to optimized mass transfer in the catalyst layer (CL) during working conditions. The electrochemical performance test result shows that the MEA fabricated from the degassed HSC ink had a peak power density of 0.84 W cm−2, which was 0.21 W cm−2 higher than that fabricated from the normal HSC ink. However, the introduction of propionic acid in the LSC ink caused the Marangoni flux to inhibit the coffee ring effect and promote the uniform deposition of the catalyst. The RDE tests indicated that the electrode deposited from the LSC ink with propionic acid possessed a mass activity of 84.4 mA∙mgPt−1, which was higher than the 60.5 mA∙mgPt−1 of the electrode deposited from the normal LSC ink.
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Liu P, Wang J, Bai J, Ma Y, Lu S, Ma N, Chao S. One-step fabrication of Cu-based metal organic framework multilayer core-shell microspheres for efficiently catalyzing the oxygen reduction reaction. Dalton Trans 2022; 51:5714-5720. [PMID: 35333276 DOI: 10.1039/d2dt00324d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Micro/nanomaterials with multilayer core-shell structures are receiving widespread attention due to their potential in energy storage and conversion systems. However, simple fabrication of multilayered core-shell structured micro/nanomaterials with a consistent composition still faces a great challenge. Herein, a simple one-step solvothermal method is used to fabricate Cu-based metal organic framework multilayer core-shell microspheres (Cu-MOF-MCSMSs) as efficient oxygen reduction reaction (ORR) catalysts. The systematic structural evolution of Cu-MOF-MCSMSs is from microspheres to core-shell microspheres and then to multilayer core-shell microspheres. Additionally, different transition metal cations and anions can also influence the structures, compositions and thus ORR activities of the synthesized MOFs. The representative Cu-MOF-MCSMSs exhibit high ORR activity and cycling stability. The simple method can provide a good guide to fabricate other micro/nanomaterials with multilayer core-shell structures and desirable properties.
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Affiliation(s)
- Ping Liu
- Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medial University, Xinxiang 453003, P. R. China.
| | - Jia Wang
- Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medial University, Xinxiang 453003, P. R. China.
| | - Jie Bai
- Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medial University, Xinxiang 453003, P. R. China.
| | - Yifei Ma
- Henan Chilwee Genshore Power Co., Ltd, Qinyang 454550, P. R. China
| | - Sihan Lu
- Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medial University, Xinxiang 453003, P. R. China.
| | - Nini Ma
- Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medial University, Xinxiang 453003, P. R. China.
| | - Shujun Chao
- Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medial University, Xinxiang 453003, P. R. China.
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Luo L, Fu C, Guo Y, Kang Q, Wu A, Cai X, Zhao L, Tan Z, Yin J, Xia G, Shen S, Zhang J. Electronic and Potential Synergistic Effects of Surface-Doped P-O Species on Uniform Pd Nanospheres: Breaking the Linear Scaling Relationship toward Electrochemical Oxygen Reduction. ACS APPLIED MATERIALS & INTERFACES 2022; 14:14146-14156. [PMID: 35289588 DOI: 10.1021/acsami.1c22935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Developing efficient oxygen reduction reaction (ORR) electrocatalysts is critical to fuel cells and metal-oxygen batteries, but also greatly hindered by the limited Pt resources and the long-standing linear scaling relationship (LSR). In this study, ∼6 nm and highly uniform Pd nanospheres (NSs) having surface-doped (SD) P-O species are synthesized and evenly anchored onto carbon blacks, which are further simply heat-treated (HT). Under alkaline conditions, Pd/SDP-O NSs/C-HT exhibits respective 8.7 (4.3)- and 5.0 (5.5)-fold enhancements in noble-metal-mass- and area-specific activity (NM-MSA and ASA) compared with the commercial Pd/C (Pt/C). It also possesses an improved electrochemical stability. Besides, its acidic ASA and NM-MSA are 2.9 and 5.1 times those of the commercial Pd/C, respectively, and reach 65.4 and 51.5% of those of the commercial Pt/C. Moreover, it also shows nearly ideal 4-electron ORR pathways under both alkaline and acidic conditions. The detailed experimental and theoretical analyses reveal the following: (1) The electronic effect induced by the P-O species can downshift the surface d-band center to weaken the intermediate adsorptions, thus preserving more surface active sites. (2) More importantly, the potential hydrogen bond between the O atom in the P-O species and the H atom in the hydrogen-containing intermediates can in turn stabilize their adsorptions, thus breaking the ORR LSR toward more efficient ORRs and 4-electron pathways. This study develops a low-cost and high-performance ORR electrocatalyst and proposes a promising strategy for breaking the ORR LSR, which may be further applied in other electrocatalysis.
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Affiliation(s)
- Liuxuan Luo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Cehuang Fu
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yangge Guo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qi Kang
- Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Aiming Wu
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiyang Cai
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lutian Zhao
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zehao Tan
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiewei Yin
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Guofeng Xia
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shuiyun Shen
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Junliang Zhang
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Zhang S, Zhou H, Liao H, Tan P, Tian W, Pan J. Microbial synthesis of efficient palladium electrocatalyst with high loadings for oxygen reduction reaction in acidic medium. J Colloid Interface Sci 2021; 611:161-171. [PMID: 34952270 DOI: 10.1016/j.jcis.2021.12.080] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/11/2021] [Accepted: 12/13/2021] [Indexed: 11/24/2022]
Abstract
Whereas limited amount of precious metal adsorbed by bacteria conflicting the needs of high loadings for better catalytic performances, cell disruption technology was adopted to smash Shewanella cells in this work, releasing abundant oxygen functional groups inside the cells for better adsorption of palladium ion. Then palladium catalysts were synthesized in two ways: 1) Pd catalyst supported on carbonized-broken-bacterial (Pd/FHNC) was obtained after direct carbonization and reduction; 2) Electrospinning technology was used to spin the broken Shewanella into fibers, and Pd nanoparticles supported on nitrogen-doped carbon nanofiber (Pd/NCNF) was prepared following carbonization and hydrogen reduction. The as-prepared catalysts exhibit excellent oxygen reduction reaction (ORR) electrocatalytic performance in the acid medium. The mass specific activities at 0.7 V of Pd/FHNC and Pd/NCNF were 0.213 A mg-1 and 0.121 A mg-1 which were 5.92 and 3.36 times than those of commercial Pd/C(0.036 A mg-1) respectively, and they also displayed higher stability than Pd/C. Furthermore, the Pd loadings of Pd/FHNC and Pd/NCNF were 21.52% and 17.13% respectively. An explanation for the improved performance is the co-doping of nitrogen and phosphorus, also the tight integration of Pd and broken-bacterial. Herein, we propose a novel and effective method for synthesis of ORR electrocatalysts.
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Affiliation(s)
- Shaohui Zhang
- State Key Laboratory of Powder Metallurgy, Central South University, 932 Lushan Road, Changsha 410083, PR China
| | - Haikun Zhou
- School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Hanxiao Liao
- State Key Laboratory of Powder Metallurgy, Central South University, 932 Lushan Road, Changsha 410083, PR China
| | - Pengfei Tan
- State Key Laboratory of Powder Metallurgy, Central South University, 932 Lushan Road, Changsha 410083, PR China
| | - Wenying Tian
- Tsinghua Shenzhen International Graduate School, Shenzhen 518055, PR China.
| | - Jun Pan
- State Key Laboratory of Powder Metallurgy, Central South University, 932 Lushan Road, Changsha 410083, PR China.
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Zhang J, Zhao T, Yuan M, Li Z, Wang W, Bai Y, Liu Z, Li S, Zhang G. Trimetallic synergy in dendritic intermetallic PtSnBi nanoalloys for promoting electrocatalytic alcohol oxidation. J Colloid Interface Sci 2021; 602:504-512. [PMID: 34144304 DOI: 10.1016/j.jcis.2021.06.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/30/2021] [Accepted: 06/04/2021] [Indexed: 11/17/2022]
Abstract
Developing effective and robust novel electrocatalysts for direct alcohol fuel cells has been gaining much attention. However, the widely used Pt catalyst suffers from limitations including the sluggish kinetics, severe CO poisoning, and catalyst lost caused by aggregation and Ostwald ripening during alcohol oxidation reaction. Herein, dendritic intermetallic PtSnBi nanoalloys were synthesized via a facile hydrothermal approach with high electrocatalytic performance and enhanced CO resistance for methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR) owing to the synergism of the chosen three elements and unique three-dimensional morphology. Specifically, the PtSnBi nanoalloys display 4.6 and 6.7 times higher of mass activity (7.02 A mg-1Pt) and specific activity (16.65 mA cm-2) toward MOR than those of commercial Pt/C, respectively. The mass activity of PtSnBi nanoalloys still retains 75.7% of the initial value after 800 cycles of stability test, superior to Pt/C (38.0%). The dual-functional effect of Sn, optimized electronic structure by the ligand effect, and unique atomic arrangement are responsible for the enhanced MOR activity and stability of PtSnBi nanoalloys. Furthermore, the PtSnBi nanoalloys with highlighted anti-CO poisoning capacity also improve the electrocatalytic performance toward EOR, indicating their great promise as broad energy electrocatalysts.
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Affiliation(s)
- Jingxian Zhang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, PR China; Center of Materials Science and Optoeletronics Engineering, University of Chinese Academy of Sciences, 100049, PR China
| | - Tongkun Zhao
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, PR China; Center of Materials Science and Optoeletronics Engineering, University of Chinese Academy of Sciences, 100049, PR China
| | - Menglei Yuan
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, PR China; Center of Materials Science and Optoeletronics Engineering, University of Chinese Academy of Sciences, 100049, PR China
| | - Zehui Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Wenbo Wang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, PR China; Center of Materials Science and Optoeletronics Engineering, University of Chinese Academy of Sciences, 100049, PR China
| | - Yiling Bai
- State Key Laboratory of Coal Conversion, CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; Synfuels China Technology Co. Ltd., Huairou District, Beijing 101407 China
| | - Zhanjun Liu
- Center of Materials Science and Optoeletronics Engineering, University of Chinese Academy of Sciences, 100049, PR China; State Key Laboratory of Coal Conversion, CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Shuwei Li
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, PR China; Center of Materials Science and Optoeletronics Engineering, University of Chinese Academy of Sciences, 100049, PR China
| | - Guangjin Zhang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, PR China; Center of Materials Science and Optoeletronics Engineering, University of Chinese Academy of Sciences, 100049, PR China.
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Fu C, Luo L, Yang L, Shen S, Yan X, Yin J, Wei G, Zhang J. An In‐Depth Theoretical Exploration of Influences of Non‐Metal‐Elements Doping on the ORR Performance of Co−gN
4. ChemCatChem 2021. [DOI: 10.1002/cctc.202001713] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Cehuang Fu
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Liuxuan Luo
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Lijun Yang
- MOE Key Laboratory of Mesoscopic Chemistry, Jiangsu Provincial Lab for Nanotechnology School of Chemistry and Chemical Engineering Nanjing University Nanjing 210240 P. R. China
| | - Shuiyun Shen
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Xiaohui Yan
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Jiewei Yin
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Guanghua Wei
- SJTU-Paris Tech Elite Institute of Technology Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Junliang Zhang
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 P. R. China
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Song R, Cao X, Xu J, Zhou X, Wang X, Yuan N, Ding J. O,N-Codoped 3D graphene hollow sphere derived from metal-organic frameworks as oxygen reduction reaction electrocatalysts for Zn-air batteries. NANOSCALE 2021; 13:6174-6183. [PMID: 33734253 DOI: 10.1039/d0nr09174j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Although Pt-based oxygen reduction reaction (ORR) catalysts have excellent performance, they are expensive and suffer from poor durability. It is necessary to explore carbon-based ORR electrocatalysts with low cost, high specific surface area, large porosity, and strong chemical stability. Herein, we have synthesized a zinc-based metal-organic framework precursor (Zn-BTC) using a simple solvothermal method. Then, carbonization and N doping have been carried out by means of high-temperature pyrolysis, ultimately affording metal-free 3D hollow spherical O and N dual-doped graphene framework composites (O,N-graphene) with an average diameter of about 4 μm and specific surface area as high as 1801.4 m2 g-1. O,N-Graphene has superior ORR electrocatalytic activity with an onset potential Eonset = 1.01 V vs. RHE and a half-wave potential E1/2 = 0.842 V vs. RHE, which are comparable with commercial 20 wt% Pt/C with a 4-electron reduction process. The O,N-graphene catalyst shows better durability and methanol tolerance at a lower cost than commercial 20 wt% Pt/C. The peak power density of O,N-graphene as the cathode of a traditional Zn-air battery is 152.8 mW cm-2, which is higher than that of a commercial 20 wt% Pt/C battery (119.8 mW cm-2). Our findings indicate that synergy among the 3D hollow structure, large specific surface area, highly conductive graphene framework, and pyridine N and graphite N defects left in O,N-graphene accelerated O2 diffusion and increased catalytically active sites, thereby affording superior ORR and improved Zn-air battery performance under alkaline conditions.
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Affiliation(s)
- Ruili Song
- Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering, Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology, Changzhou University, Changzhou University, Changzhou 213164, P. R. China.
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13
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Li X, You H, Wang C, Liu D, Yu R, Guo S, Wang Y, Du Y. 3D Taraxacum-like porous Pd nanocages with Bi doping: High-performance non-Pt electrocatalysts for ethanol oxidation reaction. J Colloid Interface Sci 2021; 591:203-210. [PMID: 33609892 DOI: 10.1016/j.jcis.2021.02.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/12/2021] [Accepted: 02/04/2021] [Indexed: 10/22/2022]
Abstract
Modifying the electronic structure and optimizing the geometric structure can expeditiously tune the electrocatalytic properties of catalysts, resulting in considerably enhanced electrocatalytic performance towards electrocatalytic oxidation of liquid fuels. We herein report a simple synthetic strategy to prepare Bi-doped 3D taraxacum-like Pd nanocages (NCs) composed of porous nanosheets, which possess high surface areas and strong synergistic effects. Notably, a trace of Bi diffuses into the lattice of Pd and increases the electronic effects of the surface of Pd, endowing PdBi-0.5 NCs/C with superior electrocatalytic performance towards ethanol oxidation reaction (EOR). The mass activity and specific activity of PdBi-0.5 NCs/C were 3494.8 mA mgPd-1 and 10.37 mA cm-2, being 4.08- and 4.82- fold enhancements as compared with commercial Pd/C, respectively. Moreover, the highly open porous 3D nanocages structure with rich active sites and defects can also facilitate the mass/electron transfer to favor the EOR kinetics.
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Affiliation(s)
- Xingchi Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China
| | - Huaming You
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China
| | - Cheng Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China
| | - Dongmei Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China
| | - Rui Yu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China
| | - Siyu Guo
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China.
| | - Yuan Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China
| | - Yukou Du
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Renai Road, Suzhou 215123, PR China.
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14
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Fu C, Luo L, Yang L, Shen S, Wei G, Zhang J. Breaking the scaling relationship of ORR on carbon-based single-atom catalysts through building a local collaborative structure. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01195b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The local collaborative structure further stabilizes the OOH*/OH* and weakens the on metal site by hydrogen bond and repulsive interaction, for which the scaling relationship of ORR could be broken.
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Affiliation(s)
- Cehuang Fu
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liuxuan Luo
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lijun Yang
- MOE Key Laboratory of Mesoscopic Chemistry, Jiangsu Provincial Lab for Nanotechnology, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shuiyun Shen
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Guanghua Wei
- SJTU-Paris Tech Elite Institute of Technology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Junliang Zhang
- Institute of Fuel Cells, MOE Key Laboratory of Power & Machinery Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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15
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Cu and Pd nanoparticles supported on a graphitic carbon material as bifunctional HER/ORR electrocatalysts. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.04.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Controllable growth of palladium on gold multipod nanoparticles and their enhanced electrochemical oxygen reduction reaction performances. J Catal 2020. [DOI: 10.1016/j.jcat.2020.04.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Lyu X, Jia Y, Mao X, Li D, Li G, Zhuang L, Wang X, Yang D, Wang Q, Du A, Yao X. Gradient-Concentration Design of Stable Core-Shell Nanostructure for Acidic Oxygen Reduction Electrocatalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2003493. [PMID: 32596981 DOI: 10.1002/adma.202003493] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/02/2020] [Indexed: 05/20/2023]
Abstract
Manipulating the surface structure of electrocatalysts at the atomic level is of primary importance to simultaneously achieve the activity and stability dual-criteria in oxygen reduction reaction (ORR) for proton exchange membrane fuel cells. Here, a durable acidic ORR electrocatalyst with the "defective-armored" structure of Pt shell and Pt-Ni core nanoparticle decorated on graphene (Pt-Ni@PtD /G) using a facile and controllable galvanic replacement reaction to generate gradient distribution of Pt-Ni composition from surface to interior, followed by a partial dealloying approach, leaching the minor nickel atoms on the surface to generate defective Pt skeleton shell, is reported. The Pt-Ni@PtD /G catalyst shows impressive performance for ORR in acidic (0.1 m HClO4 ) electrolyte, with a high mass activity of threefold higher than that of Pt/C catalyst owing to the tuned electronic structure of locally concave Pt surface sites through synergetic contributions of Pt-Ni core and defective Pt shell. More importantly, the electrochemically active surface areas still retain 96% after 20 000 potential cycles, attributing to the Pt atomic shell acting as the protective "armor" to prevent interior Ni atoms from further dissolution during the long-term operation.
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Affiliation(s)
- Xiao Lyu
- School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, 110159, P. R. China
- Queensland Micro- and Nanotechnology Centre and School of Natural Sciences, Griffith University, Brisbane, QLD, 4111, Australia
| | - Yi Jia
- Queensland Micro- and Nanotechnology Centre and School of Natural Sciences, Griffith University, Brisbane, QLD, 4111, Australia
| | - Xin Mao
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Daohao Li
- State Key Lab of Inorganic Chemistry and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
- School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Gen Li
- School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, 110159, P. R. China
| | - Linzhou Zhuang
- School of Chemical Engineering, the University of Queensland, Brisbane, QLD, 4072, Australia
| | - Xin Wang
- Queensland Micro- and Nanotechnology Centre and School of Natural Sciences, Griffith University, Brisbane, QLD, 4111, Australia
| | - Dongjiang Yang
- School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Qiang Wang
- Key Laboratory of Electromagnetic Processing of Materials, Northeastern University, Shenyang, 110819, P. R. China
| | - Aijun Du
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Xiangdong Yao
- Queensland Micro- and Nanotechnology Centre and School of Natural Sciences, Griffith University, Brisbane, QLD, 4111, Australia
- State Key Lab of Inorganic Chemistry and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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18
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Ma Z, Cano ZP, Yu A, Chen Z, Jiang G, Fu X, Yang L, Wu T, Bai Z, Lu J. Enhancing Oxygen Reduction Activity of Pt‐based Electrocatalysts: From Theoretical Mechanisms to Practical Methods. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003654] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhong Ma
- Department of Chemical Engineering Waterloo Institute for Nanotechnology Waterloo Institute for Sustainable Energy University of Waterloo Waterloo Ontario N2L 3G1 Canada
| | - Zachary P. Cano
- Department of Chemical Engineering Waterloo Institute for Nanotechnology Waterloo Institute for Sustainable Energy University of Waterloo Waterloo Ontario N2L 3G1 Canada
| | - Aiping Yu
- Department of Chemical Engineering Waterloo Institute for Nanotechnology Waterloo Institute for Sustainable Energy University of Waterloo Waterloo Ontario N2L 3G1 Canada
| | - Zhongwei Chen
- Department of Chemical Engineering Waterloo Institute for Nanotechnology Waterloo Institute for Sustainable Energy University of Waterloo Waterloo Ontario N2L 3G1 Canada
| | - Gaopeng Jiang
- Department of Chemical Engineering Waterloo Institute for Nanotechnology Waterloo Institute for Sustainable Energy University of Waterloo Waterloo Ontario N2L 3G1 Canada
| | - Xiaogang Fu
- Department of Chemical Engineering Waterloo Institute for Nanotechnology Waterloo Institute for Sustainable Energy University of Waterloo Waterloo Ontario N2L 3G1 Canada
| | - Lin Yang
- School of Chemistry and Chemical Engineering Key Laboratory of Green Chemical Media and Reactions Ministry of Education, Henan Normal University Xinxiang 453007 China
| | - Tianpin Wu
- X-ray Science Division Advanced Photon Sources Argonne National Laboratory 9700 South Cass Avenue Lemont IL 60439 USA
| | - Zhengyu Bai
- School of Chemistry and Chemical Engineering Key Laboratory of Green Chemical Media and Reactions Ministry of Education, Henan Normal University Xinxiang 453007 China
| | - Jun Lu
- Chemical Sciences and Engineering Division Argonne National Laboratory 9700 South Cass Avenue Lemont IL 60439 USA
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19
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Ma Z, Cano ZP, Yu A, Chen Z, Jiang G, Fu X, Yang L, Wu T, Bai Z, Lu J. Enhancing Oxygen Reduction Activity of Pt-based Electrocatalysts: From Theoretical Mechanisms to Practical Methods. Angew Chem Int Ed Engl 2020; 59:18334-18348. [PMID: 32271975 DOI: 10.1002/anie.202003654] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Indexed: 11/06/2022]
Abstract
Pt-based electrocatalysts are considered as one of the most promising choices to facilitate the oxygen reduction reaction (ORR), and the key factor enabling their success is to reduce the required amount of platinum. Herein, we focus on illuminating both the theoretical mechanisms which enable enhanced and sustained ORR activity and the practical methods to achieve them in catalysts. The various multi-step pathways of ORR are firstly reviewed and the rate-determining steps based on the reaction intermediates and their binding energies are analyzed. We then explain the critical aspects of Pt-based electrocatalysts to tune oxygen reduction properties from the viewpoints of active sites exposure and altering the surface electronic structure, and further summarize representative research progress towards practically achieving these activity enhancements with a focus on platinum size reduction, shape control and core Pt elimination methods. We finally outline the remaining challenges and provide our perspectives with regard to further enhancing their activities.
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Affiliation(s)
- Zhong Ma
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology Waterloo, Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Zachary P Cano
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology Waterloo, Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Aiping Yu
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology Waterloo, Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Zhongwei Chen
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology Waterloo, Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Gaopeng Jiang
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology Waterloo, Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Xiaogang Fu
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology Waterloo, Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
| | - Lin Yang
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, 453007, China
| | - Tianpin Wu
- X-ray Science Division, Advanced Photon Sources, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL, 60439, USA
| | - Zhengyu Bai
- School of Chemistry and Chemical Engineering, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Normal University, Xinxiang, 453007, China
| | - Jun Lu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL, 60439, USA
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20
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Luo L, Fu C, Yan X, Shen S, Yang F, Guo Y, Zhu F, Yang L, Zhang J. Promoting Effects of Au Submonolayer Shells on Structure-Designed Cu-Pd/Ir Nanospheres: Greatly Enhanced Activity and Durability for Alkaline Ethanol Electro-Oxidation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:25961-25971. [PMID: 32395980 DOI: 10.1021/acsami.0c05605] [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
Rationally engineering the surface physicochemical properties of nanomaterials can improve their activity and durability for various electrocatalytic and energy conversion applications. Cu-Pd/Ir (CPI) nanospheres (NSs) anchored on N-doped porous graphene (NPG) [(CPI NSs/NPG)] have been recently demonstrated as a promising electrocatalyst for the alkaline ethanol oxidation reaction (EOR); to further enhance their electrocatalytic performance, the NPG-supported CPI NSs are coated with Au submonolayer (SML) shells (SMSs), through which their surface physicochemical properties can be tuned. CPI NSs/NPG is prepared by our previously developed method and possesses the special structures of composition-graded Cu1Pd1 and surface-doped Ir0.03. The Au SMSs with designed surface coverages are formed via an electrochemical technology involving incomplete Cu underpotential deposition (UPD) and Au3+ galvanic replacement. A distinctive volcano-type relation between the EOR electrocatalytic activity and the Au-SMS surface coverage for CPI@AuSML NSs/NPG is revealed, and the optimal CPI@Au1/6ML NSs/NPG greatly surpasses commercial Pd/C and CPI NSs/NPG in electrocatalytic activity and noble metal utilization. More importantly, its electrocatalytic durability in 1 h chronoamperometric and 500-cycle potential cycling degradation tests is also significantly improved. According to detailed physicochemical characterizations, electrochemical analyses, and density functional theory calculations, the promoting effects of the Au SMS for enhancing the EOR electrocatalytic activity and durability of CPI NSs/NPG can be mainly attributed to the greatly weakened carbonaceous intermediate bonding and properly increased surface oxidation potential. This work also proposes a versatile and effective strategy to tune the surface physicochemical properties of metal-based nanomaterials via incomplete UPD and metal-cation galvanic replacement for advancing their electrocatalytic and energy conversion performance.
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Affiliation(s)
- Liuxuan Luo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Cehuang Fu
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaohui Yan
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shuiyun Shen
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fan Yang
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yangge Guo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fengjuan Zhu
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lijun Yang
- Key Laboratory for Mesoscopic Chemistry of MOE, Jiangsu Provincial Lab for Nanotechnology, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Junliang Zhang
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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21
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Lu X, Ahmadi M, DiSalvo FJ, Abruña HD. Enhancing the Electrocatalytic Activity of Pd/M (M = Ni, Mn) Nanoparticles for the Oxygen Reduction Reaction in Alkaline Media through Electrochemical Dealloying. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05499] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinyao Lu
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Mahdi Ahmadi
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Francis J. DiSalvo
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Héctor D. Abruña
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
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22
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Radhakrishnan T, Nampoothiri KN, Sandhyarani N. Enhanced electro-catalytic activity of palladium nanocoral structures with platinum incorporation. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135840] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Yin S, Wang Z, Li C, Yu H, Deng K, Xu Y, Li X, Wang L, Wang H. Mesoporous Pt@PtM (M = Co, Ni) cage-bell nanostructures toward methanol electro-oxidation. NANOSCALE ADVANCES 2020; 2:1084-1089. [PMID: 36133045 PMCID: PMC9417950 DOI: 10.1039/d0na00020e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 02/08/2020] [Indexed: 06/16/2023]
Abstract
Rational design of Pt-based nanostructures with a controllable morphology and composition is vital for electrocatalysis. Herein, we demonstrate a dual-template strategy to fabricate well-defined cage-bell nanostructures including a Pt core and a mesoporous PtM (M = Co, Ni) bimetallic shell (Pt@mPtM (M = Co, Ni) CBs). Owing to their unique nanostructure and bimetallic properties, Pt@mPtM (M = Co, Ni) CBs show higher catalytic activity, better durability and stronger CO tolerance for the methanol oxidation reaction than commercial Pt/C. This work provides a general method for convenient preparation of cage-bell nanostructures with a mesoporous bimetallic shell, which have high promising potential for application in electrocatalytic fields.
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Affiliation(s)
- Shuli Yin
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Ziqiang Wang
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Chunjie Li
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Hongjie Yu
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Kai Deng
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - You Xu
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Xiaonian Li
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Liang Wang
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Hongjing Wang
- State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology Hangzhou 310014 P. R. China
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24
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Yang Y, Chen G, Zeng R, Villarino AM, DiSalvo FJ, van Dover RB, Abruña HD. Combinatorial Studies of Palladium-Based Oxygen Reduction Electrocatalysts for Alkaline Fuel Cells. J Am Chem Soc 2020; 142:3980-3988. [DOI: 10.1021/jacs.9b13400] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yao Yang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Guanyu Chen
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Rui Zeng
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Andrés Molina Villarino
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Francis J. DiSalvo
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - R. Bruce van Dover
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Héctor D. Abruña
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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25
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Luo L, Fu C, Yang F, Li X, Jiang F, Guo Y, Zhu F, Yang L, Shen S, Zhang J. Composition-Graded Cu–Pd Nanospheres with Ir-Doped Surfaces on N-Doped Porous Graphene for Highly Efficient Ethanol Electro-Oxidation in Alkaline Media. ACS Catal 2019. [DOI: 10.1021/acscatal.9b05292] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Liuxuan Luo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Cehuang Fu
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fan Yang
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaolin Li
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fangling Jiang
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yangge Guo
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fengjuan Zhu
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lijun Yang
- Key Laboratory for Mesoscopic Chemistry of MOE, Jiangsu Provincial Lab for Nanotechnology, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shuiyun Shen
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Junliang Zhang
- Institute of Fuel Cells, Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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26
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Bhalothia D, Fan YJ, Lai YC, Yang YT, Yang YW, Lee CH, Chen TY. Conformational Effects of Pt-Shells on Nanostructures and Corresponding Oxygen Reduction Reaction Activity of Au-Cluster-Decorated NiO x@Pt Nanocatalysts. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1003. [PMID: 31336802 PMCID: PMC6669587 DOI: 10.3390/nano9071003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/08/2019] [Accepted: 07/09/2019] [Indexed: 11/16/2022]
Abstract
Herein, ternary metallic nanocatalysts (NCs) consisting of Au clusters decorated with a Pt shell and a Ni oxide core underneath (called NPA) on carbon nanotube (CNT) support were synthesized by combining adsorption, precipitation, and chemical reduction methods. By a retrospective investigation of the physical structure and electrochemical results, we elucidated the effects of Pt/Ni ratios (0.4 and 1.0) and Au contents (2 and 9 wt.%) on the nanostructure and corresponding oxygen reduction reaction (ORR) activity of the NPA NCs. We found that the ORR activity of NPA NCs was mainly dominated by the Pt-shell thickness which regulated the depth and size of the surface decorated with Au clusters. In the optimal case, NPA-1004006 (with a Pt/Ni of 0.4 and Au of ~2 wt.%) showed a kinetic current (JK) of 75.02 mA cm-2 which was nearly 17-times better than that (4.37 mA cm-2) of the commercial Johnson Matthey-Pt/C (20 wt.% Pt) catalyst at 0.85 V vs. the reference hydrogen electrode. Such a high JK value resulted in substantial improvements in both the specific activity (by ~53-fold) and mass activity (by nearly 10-fold) in the same benchmark target. Those scenarios rationalize that ORR activity can be substantially improved by a syngeneic effect at heterogeneous interfaces among nanometer-sized NiOx, Pt, and Au clusters on the NC surface.
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Affiliation(s)
- Dinesh Bhalothia
- Institute of Electronics Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yu-Jui Fan
- School of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
| | - Yen-Chun Lai
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
- National Synchrotron Radiation Research Center, Hsinchu 30007, Taiwan
| | - Ya-Tang Yang
- Institute of Electronics Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yaw-Wen Yang
- National Synchrotron Radiation Research Center, Hsinchu 30007, Taiwan
| | - Chih-Hao Lee
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Tsan-Yao Chen
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan.
- Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan.
- Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan.
- Higher Education Sprout Project, Competitive Research Team, National Tsing Hua University, Hsinchu 30013, Taiwan.
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27
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Zhang X, Ossufo IGA, Ye H, Huang Y, Ge S, Xiang Z, Cui Y, Wang R. Efficient Synthesis of Bimetallic Pt
3
Zn Alloy Nanocrystals with Different Shapes and their Enhanced Electrocatalytic Activity. ChemCatChem 2019. [DOI: 10.1002/cctc.201900649] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xinran Zhang
- Beijing Advanced Innovation Center of Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology Beijing Beijing 100083 P.R. China
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Iahaia Gomes Ali Ossufo
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Huanyu Ye
- Beijing Advanced Innovation Center of Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology Beijing Beijing 100083 P.R. China
| | - Yunxia Huang
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Shuaipeng Ge
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Zhongcheng Xiang
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Yimin Cui
- Key Laboratory of Micro-nano Measurement-Manipulation and Physics Ministry of Education Department of PhysicsBeihang University Beijing 100191 P.R. China
| | - Rongming Wang
- Beijing Advanced Innovation Center of Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science School of Mathematics and PhysicsUniversity of Science and Technology Beijing Beijing 100083 P.R. China
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28
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Yang Y, Xiao W, Feng X, Xiong Y, Gong M, Shen T, Lu Y, Abruña HD, Wang D. Golden Palladium Zinc Ordered Intermetallics as Oxygen Reduction Electrocatalysts. ACS NANO 2019; 13:5968-5974. [PMID: 30998846 DOI: 10.1021/acsnano.9b01961] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Exploring Pt-free electrocatalysts with high activity and long durability for the oxygen reduction reaction (ORR) has been long pursued by the renewable energy materials community. In this work, we have designed an ordered intermetallic PdZn/C (O-PdZn) with a several atomic-layer Pd shell, which achieved a 3-fold enhancement in ORR mass activities (MA) in alkaline media, relative to Pd/C and Pt/C. Further Au incorporation in O-PdZn/C (Au-O-PdZn/C) yielded a catalyst with superior durability with less than 10% loss in MA after 30000 potential cycles. These effects have attributed to the rationally designed ordered structure and stabilizing effect of Au atoms. Aberration-corrected scanning transmission electron microscopy and synchrotron-based X-ray fluorescence spectroscopy were employed to show that Au not only galvanically replaced Pd and Zn on the surface but also penetrated through the PdZn lattice and distributed uniformly within the particles. Au-O-PdZn/C was also tested as an effective oxygen cathode in broad applications in rechargeable Li-air and Zn-air batteries.
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Affiliation(s)
- Yao Yang
- 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 , China
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States
| | - Weiping Xiao
- 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 , China
| | - Xinran Feng
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States
- Cornell High Energy Synchrotron Source (CHESS) , Cornell University , Ithaca , New York 14853 , United States
| | - Yin Xiong
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States
| | - Mingxing Gong
- 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 , China
| | - Tao Shen
- 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 , China
| | - Yun Lu
- 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 , China
| | - Héctor D Abruña
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States
| | - Deli Wang
- 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 , China
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29
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Bhalothia D, Lin CY, Yan C, Yang YT, Chen TY. H 2 Reduction Annealing Induced Phase Transition and Improvements on Redox Durability of Pt Cluster-Decorated Cu@Pd Electrocatalysts in Oxygen Reduction Reaction. ACS OMEGA 2019; 4:971-982. [PMID: 31459372 PMCID: PMC6648878 DOI: 10.1021/acsomega.8b02896] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 12/31/2018] [Indexed: 05/27/2023]
Abstract
Hierarchical structures in shell with transition metal underneath is a promising design for high-performance and low-cost heterogeneous nanocatalysts (NCs). Such a design enables the optimum extent of synergetic effects in NC surface. It facilitates intermediate reaction steps and, therefore, boosts activity of NC in oxygen reduction reaction (ORR). In this study, carbon nanotube (CNT)-supported ternary metallic NC comprising Cucluster-in-Pdcluster nanocrystal and surface decoration of atomic Pt clusters (14 wt %) is synthesized by using the wet chemical reduction method with sequence and reaction time controls. By annealing in H2 environment (H2/N2 = 9:1, 10 sccm) at 600 K for 2 h, specific activity of Cu@Pd/Pt is substantially improved by ∼2.0-fold as compared to that of the pristine sample and commercial Pt catalysts. By cross-referencing results of electron microscopic, X-ray spectroscopic, and electrochemical analyses, we demonstrated that reduction annealing turns ternary NC into complex of Cu3Pt alloy and Cu x Pd1-x alloy. Such a transition preserves Pt and Pd in metallic phases, therefore improving the activity by ∼29% and the stability of NC in an accelerated degradation test (ADT) as compared to those of pristine Cu@Pd/Pt in 36 000 cycles at 0.85 V (vs RHE). This study presents robust H2 annealing for structure stabilization of NC and systematic characterizations for rationalization of the corresponding mechanisms. These results provide promising scenarios for facilitation of heterogeneous NC in ORR applications.
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Affiliation(s)
- Dinesh Bhalothia
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Cheng-Yang Lin
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Che Yan
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Ya-Tang Yang
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Tsan-Yao Chen
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
- Hierarchical
Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan
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30
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Zhao ML, Hao LN, Zhang J, Zhang CY, Lu Y, Qian HS. Sequential Growth of High Quality Sub-10 nm Core-Shell Nanocrystals: Understanding the Nucleation and Growth Process Using Dynamic Light Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:489-494. [PMID: 30561206 DOI: 10.1021/acs.langmuir.8b03940] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Monodisperse sub-10 nm core-shell nanocrystals have been extensively studied owing to their important applications in catalysis, bioimaging, nanomedicine, and so on. In this work, an amorphous shell component crystallization strategy has been proposed to prepare high quality sub-10 nm NaYF4:Yb/Er@NaGdF4 core-shell nanocrystals successfully via a sequential growth process. The dynamic light scattering technique has been used to investigate the secondary nucleation and growth process forming the core-shell nanocrystals. The size and morphology evolution of the core-shell nanocrystals reveals that the secondary nucleation of the shell component is unavoidable after hot-injecting the shell precursor at high temperatures, which was followed by dissolution and recrystallization (an Ostwald ripening process) to partially produce the core-shell nanocrystals. The present study demonstrates that the size of seed nanocrystals and the injection temperature of the shell component precursor play a vital role in the formation of core-shell nanostructures completely. This work will provide an alternative strategy for precisely controlling the fabrication of sub-10 nm core-shell nanostructures for various applications.
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Affiliation(s)
| | | | | | | | | | - Hai-Sheng Qian
- Biomedical and Environmental Interdisciplinary Research Centre , Hefei 230010 , P. R. China
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31
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Ercolano G, Farina F, Stievano L, Jones DJ, Rozière J, Cavaliere S. Preparation of Ni@Pt core@shell conformal nanofibre oxygen reduction electrocatalysts via microwave-assisted galvanic displacement. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01514k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ni@Pt core@shell nanofibres with controlled platinum shell thickness and Pt/Ni ratio are synthesised by an extremely fast and reproducible route, allowing their direct use as electrocatalysts.
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Affiliation(s)
- Giorgio Ercolano
- Institut Charles Gerhardt Montpellier
- UMR CNRS 5253
- Agrégats Interfaces et Matériaux pour l'Energie
- Université de Montpellier
- 34095 Montpellier Cedex 5
| | - Filippo Farina
- Institut Charles Gerhardt Montpellier
- UMR CNRS 5253
- Agrégats Interfaces et Matériaux pour l'Energie
- Université de Montpellier
- 34095 Montpellier Cedex 5
| | - Lorenzo Stievano
- Institut Charles Gerhardt Montpellier
- UMR CNRS 5253
- Agrégats Interfaces et Matériaux pour l'Energie
- Université de Montpellier
- 34095 Montpellier Cedex 5
| | - Deborah J. Jones
- Institut Charles Gerhardt Montpellier
- UMR CNRS 5253
- Agrégats Interfaces et Matériaux pour l'Energie
- Université de Montpellier
- 34095 Montpellier Cedex 5
| | - Jacques Rozière
- Institut Charles Gerhardt Montpellier
- UMR CNRS 5253
- Agrégats Interfaces et Matériaux pour l'Energie
- Université de Montpellier
- 34095 Montpellier Cedex 5
| | - Sara Cavaliere
- Institut Charles Gerhardt Montpellier
- UMR CNRS 5253
- Agrégats Interfaces et Matériaux pour l'Energie
- Université de Montpellier
- 34095 Montpellier Cedex 5
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32
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Park J, Kwon T, Kim J, Jin H, Kim HY, Kim B, Joo SH, Lee K. Hollow nanoparticles as emerging electrocatalysts for renewable energy conversion reactions. Chem Soc Rev 2018; 47:8173-8202. [PMID: 30009297 DOI: 10.1039/c8cs00336j] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
While the realization of clean and sustainable energy conversion systems primarily requires the development of highly efficient catalysts, one of the main issues had been designing the structure of the catalysts to fulfill minimum cost as well as maximum performance. Until now, noble metal-based nanocatalysts had shown outstanding performances toward the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). However, the scarcity and high cost of them impeded their practical use. Recently, hollow nanostructures including nanocages and nanoframes had emerged as a burgeoning class of promising electrocatalysts. The hollow nanostructures could expose a high proportion of active surfaces while saving the amounts of expensive noble metals. In this review, we introduced recent advances in the synthetic methodologies for generating noble metal-based hollow nanostructures based on thermodynamic and kinetic approaches. We summarized electrocatalytic applications of hollow nanostructures toward the ORR, OER, and HER. We next provided strategies that could endow structural robustness to the flimsy structural nature of hollow structures. Finally, we concluded this review with perspectives to facilitate the development of hollow nanostructure-based catalysts for energy applications.
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Affiliation(s)
- Jongsik Park
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea.
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33
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Song P, Xu H, Wang J, Zhang Y, Gao F, Guo J, Shiraishi Y, Du Y. 1D alloy ultrafine Pt-Fe nanowires as efficient electrocatalysts for alcohol electrooxidation in alkaline media. NANOSCALE 2018; 10:16468-16473. [PMID: 30152828 DOI: 10.1039/c8nr04918a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Fuel cells have been gaining much interest due to their advantages of high energy conversion efficiency, easy handling, etc., whereas some drawbacks of anode catalysts regarding limited performances have seriously restricted their practical applications. Therefore, the development of anode nanocatalysts with higher activity and stability has become an urgent need. In view of this, we have developed a facile wet-chemical approach to synthesize 1D alloy ultrafine Pt-Fe NWs, and we have also revealed the formation mechanism of the ultrafine Pt-Fe NWs using time-dependent studies. More importantly, 1D ultrafine nanowires with anisotropy, superior flexibility, high surface area and excellent conductivity are promising candidates for the improvement of nanocatalytic activity and stability enhancement. Therefore, the electrocatalytic activities of ultrafine Pt3Fe NWs in the oxidation of ethylene glycol and glycerol are 3.9 and 2.5 times greater than that of commercial Pt/C, respectively. Moreover, they provide excellent long-term stability. Our efforts may potentially promote the commercialization of fuel cells to some extent.
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Affiliation(s)
- Pingping Song
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P.R. China.
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34
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Bhalothia D, Chou JP, Yan C, Hu A, Yang YT, Chen TY. Programming ORR Activity of Ni/NiO x @Pd Electrocatalysts via Controlling Depth of Surface-Decorated Atomic Pt Clusters. ACS OMEGA 2018; 3:8733-8744. [PMID: 31459005 PMCID: PMC6645242 DOI: 10.1021/acsomega.8b01234] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 07/25/2018] [Indexed: 05/26/2023]
Abstract
Carbon nanotube supported ternary metallic nanocatalysts (NCs) comprising Nicore-Pdshell structure and Pt atomic scale clusters in shell (namely, Ni@Pd/Pt) are synthesized by using wet chemical reduction method with reaction time control. Effects of Pt4+ adsorption time and Pt/Pd composition ratios on atomic structure with respect to electrochemical performances of experimental NCs are systematically investigated. By cross-referencing results of high-resolution transmission electron microscopy, X-ray diffraction, X-ray absorption, density functional theoretical calculations, and electrochemical analysis, we demonstrate that oxygen reduction reaction (ORR) activity is dominated by depth and distribution of Pt clusters in a Ni@Pd/Pt NC. For the optimum case (Pt4+ adsorption time = 2 h), specific activity of Ni@Pd/Pt is 0.732 mA cm-2 in ORR. Such a value is 2.8-fold higher as compared to that of commercial J.M.-Pt/C at 0.85 V (vs reversible hydrogen electrode). Such improvement is attributed to the protection of defect sites from oxide reaction in the presence of Pt clusters in NC surface. When adsorption time is 10 s, Pt clusters tends to adsorb in the Ni@Pd surface. A substantially increased galvanic replacement between Pt4+ ion and Pd/Ni metal is found to result in the formation of Ni@Pd shell with Pt cluster in the interface when adsorption time is 24 h. Both structures increase the surface defect density and delocalize charge density around Pt clusters, thereby suppressing the ORR activity of Ni@Pd/Pt NCs.
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Affiliation(s)
- Dinesh Bhalothia
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Jyh-Pin Chou
- Department
of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong SAR 999077, China
| | - Che Yan
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Alice Hu
- Department
of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong SAR 999077, China
| | - Ya-Tang Yang
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Tsan-Yao Chen
- Institute
of Electronics Engineering, Department of Engineering and System
Science, and Institute of Nuclear Engineering and Science, National Tsing Hua University, Hsinchu 30013, Taiwan
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35
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Liu T, Zhang X, Huang T, Yu A. Pyridinic-N-dominated carbon frameworks with porous tungsten trioxide nano-lamellae as a promising bi-functional catalyst for Li-oxygen batteries. NANOSCALE 2018; 10:15763-15770. [PMID: 30094424 DOI: 10.1039/c8nr04026e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The rational design and synthetic route to fabricate hybrid materials with desirable electrocatalytic functionalities remain critical but still challenging for sustainable energy devices. Here, we constructed a tungsten trioxide nano-lamellae chemically anchored with pyridinic-N-dominated doped CNT/graphene frameworks (W-NCG) via a general solution-based synthesis method. The detailed results indicated that this hybrid structure is composed of vacancy-defect abundant WO3 porous nanoflakes anchoring through or onto a 3D N-doped carbon matrix. After a facile post-annealing treatment, the W-NCG sample is utilized as a bi-functional catalyst for rechargeable lithium-oxygen batteries. The optimized sample with a large BET surface exhibits unprecedented ORR/OER activity in the cell, and satisfying specific capacity (∼7850 mA h g-1) and cycling stability. This excellent electrochemical performance can be ascribed to the pseudo 3D structure with sufficient microspace and good electrical conductivity, which facilitate the high dispersion of active components and effectivly relieve the formation of large/irreversible Li2O2. As such, this porous W-NCG framework is a prospective high-performance cathode material for Li-O2 batteries.
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Affiliation(s)
- Tie Liu
- Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, Fudan University, Shanghai 200438, China.
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36
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Tian R, Shen S, Zhu F, Luo L, Yan X, Wei G, Zhang J. Icosahedral Pt-Ni Nanocrystalline Electrocatalyst: Growth Mechanism and Oxygen Reduction Activity. CHEMSUSCHEM 2018; 11:1015-1019. [PMID: 29380546 DOI: 10.1002/cssc.201800074] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Indexed: 06/07/2023]
Abstract
Engineering the structure of Pt alloy offers an effective way to the design of high performance electrocatalysts. Herein, we synthesize a sandwich-structured, icosahedral Pt2.1 Ni catalyst through a hot injection method. Its growth involves three steps: 1) burst nucleation of Pt atoms to form a Pt-enriched core, 2) heterogeneous nucleation of Ni atoms onto the Pt core to form a Ni-enriched interlayer, and 3) kinetic controlled growth of a Pt-enriched shell. The Pt-enriched core protects the nanostructure from collapse and mitigates the strain change caused by lattice mismatch, and thus enhances the stability of the structure. The Ni-enriched interlayer induces the electronic modification of the outermost Pt shell, and in turn tunes the activity. The Pt-enriched shell provides more active sites through the exposure of (1 1 1) facets and retards the dissolution of Ni atoms. As a result, this sandwich-structure enables impressive electrocatalytic activity (0.91 mA cm-2 and 0.32 AmgPt-1 @ 0.9 V) and duability.
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Affiliation(s)
- Renxiu Tian
- Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai, 200240, P. R. China
| | - Shuiyun Shen
- Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai, 200240, P. R. China
| | - Fengjuan Zhu
- Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai, 200240, P. R. China
| | - Liuxuan Luo
- Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai, 200240, P. R. China
| | - Xiaohui Yan
- Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai, 200240, P. R. China
| | - Guanghua Wei
- SJTU-Paris Tech Elite Institute of Technology, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, P. R. China
| | - Junliang Zhang
- Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai, 200240, P. R. China
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37
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Ren Q, Wang H, Lu X, Tong Y, Li G. Recent Progress on MOF-Derived Heteroatom-Doped Carbon-Based Electrocatalysts for Oxygen Reduction Reaction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700515. [PMID: 29593954 PMCID: PMC5867057 DOI: 10.1002/advs.201700515] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/30/2017] [Indexed: 05/20/2023]
Abstract
The oxygen reduction reaction (ORR) is the core reaction of numerous sustainable energy-conversion technologies such as fuel cells and metal-air batteries. It is crucial to develop a cost-effective, highly active, and durable electrocatalysts for ORR to overcome the sluggish kinetics of four electrons pathway. In recent years, the carbon-based electrocatalysts derived from metal-organic frameworks (MOFs) have attracted tremendous attention and have been shown to exhibit superior catalytic activity and excellent intrinsic properties such as large surface area, large pore volume, uniform pore distribution, and tunable chemical structure. Here in this review, the development of MOF-derived heteroatom-doped carbon-based electrocatalysts, including non-metal (such as N, S, B, and P) and metal (such as Fe and Co) doped carbon materials, is summarized. It furthermore, it is demonstrated that the enhancement of ORR performance is associated with favorably well-designed porous structure, large surface area, and high-tensity active sites. Finally, the future perspectives of carbon-based electrocatalysts for ORR are provided with an emphasis on the development of a clear mechanism of MOF-derived non-metal-doped electrocatalysts and certain metal-doped electrocatalysts.
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Affiliation(s)
- Qian Ren
- MOE Laboratory of Bioinorganic and Synthetic ChemistryThe Key Lab of Low‐Carbon Chemistry & Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat‐sen UniversityGuangzhou510275China
| | - Hui Wang
- MOE Laboratory of Bioinorganic and Synthetic ChemistryThe Key Lab of Low‐Carbon Chemistry & Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat‐sen UniversityGuangzhou510275China
| | - Xue‐Feng Lu
- MOE Laboratory of Bioinorganic and Synthetic ChemistryThe Key Lab of Low‐Carbon Chemistry & Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat‐sen UniversityGuangzhou510275China
| | - Ye‐Xiang Tong
- MOE Laboratory of Bioinorganic and Synthetic ChemistryThe Key Lab of Low‐Carbon Chemistry & Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat‐sen UniversityGuangzhou510275China
| | - Gao‐Ren Li
- MOE Laboratory of Bioinorganic and Synthetic ChemistryThe Key Lab of Low‐Carbon Chemistry & Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat‐sen UniversityGuangzhou510275China
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38
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Zhang X, Fan H, Zheng J, Duan S, Huang Y, Cui Y, Wang R. Pd–Zn nanocrystals for highly efficient formic acid oxidation. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01503a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Highly uniform Pd–Zn nanocrystals were facilely fabricated with coexisting noble metals and ascorbic acid, which exhibited superior electrocatalytic activity for formic acid oxidation.
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Affiliation(s)
- Xinran Zhang
- Department of Physics
- Beihang University
- Beijing 100191
- P. R. China
| | - Hongsheng Fan
- Department of Physics
- Beihang University
- Beijing 100191
- P. R. China
| | - Jinlong Zheng
- Beijing Advanced Innovation Center of Materials Genome Engineering
- and Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science
- School of Mathematics and Physics
- University of Science and Technology Beijing
- Beijing 100083
| | - Sibin Duan
- Beijing Advanced Innovation Center of Materials Genome Engineering
- and Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science
- School of Mathematics and Physics
- University of Science and Technology Beijing
- Beijing 100083
| | - Yunxia Huang
- Department of Physics
- Beihang University
- Beijing 100191
- P. R. China
| | - Yimin Cui
- Department of Physics
- Beihang University
- Beijing 100191
- P. R. China
| | - Rongming Wang
- Beijing Advanced Innovation Center of Materials Genome Engineering
- and Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science
- School of Mathematics and Physics
- University of Science and Technology Beijing
- Beijing 100083
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39
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Shen S, Guo Y, Wei G, Luo L, Li F, Li L, Xia G, Zhang J. An exploration of the use of Au submonolayer decorated Pd7Ir nanoparticles as a highly active electrocatalyst for the ethanol oxidation reaction in alkaline media. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01176a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An activity promotion over 130% from the use of Au submonolayer on carbon supported Pd7Ir nanoparticles as highly active electrocatalyst for EOR.
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Affiliation(s)
- Shuiyun Shen
- Institute of Fuel Cells
- School of Mechanical Engineering
- MOE Key Laboratory of Power & Machinery Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
| | - Yangge Guo
- Institute of Fuel Cells
- School of Mechanical Engineering
- MOE Key Laboratory of Power & Machinery Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
| | - Guanghua Wei
- SJTU-ParisTech Elite Institute of Technology
- Shanghai Jiao Tong University
- Shanghai 200240
- PR China
| | - Liuxuan Luo
- Institute of Fuel Cells
- School of Mechanical Engineering
- MOE Key Laboratory of Power & Machinery Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
| | - Fan Li
- Institute of Fuel Cells
- School of Mechanical Engineering
- MOE Key Laboratory of Power & Machinery Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
| | - Lin Li
- Institute of Fuel Cells
- School of Mechanical Engineering
- MOE Key Laboratory of Power & Machinery Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
| | - Guofeng Xia
- Institute of Fuel Cells
- School of Mechanical Engineering
- MOE Key Laboratory of Power & Machinery Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
| | - Junliang Zhang
- Institute of Fuel Cells
- School of Mechanical Engineering
- MOE Key Laboratory of Power & Machinery Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
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40
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Wang C, Cheng X, Lu J, Shen S, Yan X, Yin J, Wei G, Zhang J. The Experimental Measurement of Local and Bulk Oxygen Transport Resistances in the Catalyst Layer of Proton Exchange Membrane Fuel Cells. J Phys Chem Lett 2017; 8:5848-5852. [PMID: 29121464 DOI: 10.1021/acs.jpclett.7b02580] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Remarkable progress has been made in reducing the cathodic Pt loading of PEMFCs; however, a huge performance loss appears at high current densities, indicating the existence of a large oxygen transport resistance associated with the ultralow Pt loading catalyst layer. To reduce the Pt loading without sacrificing cell performance, it is essential to illuminate the oxygen transport mechanism in the catalyst layer. Toward this goal, an experimental approach to measure the oxygen transport resistance in catalyst layers is proposed and realized for the first time in this study. The measuring approach involves a dual-layer catalyst layer design, which consists of a dummy catalyst layer and a practical catalyst layer, followed by changing the thickness of dummy layer to respectively quantify the local and bulk resistances via limiting current measurements combined with linear extrapolation. The experimental results clearly reveal that the local resistance dominates the total resistance in the catalyst layer.
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Affiliation(s)
- Chao Wang
- Institute of Fuel Cells, School of Mechanical Engineering, and ‡SJTU-ParisTech Elite Institute of Technology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai, 200240, China
| | - Xiaojing Cheng
- Institute of Fuel Cells, School of Mechanical Engineering, and ‡SJTU-ParisTech Elite Institute of Technology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai, 200240, China
| | - Jiabin Lu
- Institute of Fuel Cells, School of Mechanical Engineering, and ‡SJTU-ParisTech Elite Institute of Technology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai, 200240, China
| | - Shuiyun Shen
- Institute of Fuel Cells, School of Mechanical Engineering, and ‡SJTU-ParisTech Elite Institute of Technology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai, 200240, China
| | - Xiaohui Yan
- Institute of Fuel Cells, School of Mechanical Engineering, and ‡SJTU-ParisTech Elite Institute of Technology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai, 200240, China
| | - Jiewei Yin
- Institute of Fuel Cells, School of Mechanical Engineering, and ‡SJTU-ParisTech Elite Institute of Technology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai, 200240, China
| | - Guanghua Wei
- Institute of Fuel Cells, School of Mechanical Engineering, and ‡SJTU-ParisTech Elite Institute of Technology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai, 200240, China
| | - Junliang Zhang
- Institute of Fuel Cells, School of Mechanical Engineering, and ‡SJTU-ParisTech Elite Institute of Technology, Shanghai Jiao Tong University , 800 Dongchuan Road, Shanghai, 200240, China
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Shen S, Cheng X, Wang C, Yan X, Ke C, Yin J, Zhang J. Exploration of significant influences of the operating conditions on the local O 2 transport in proton exchange membrane fuel cells (PEMFCs). Phys Chem Chem Phys 2017; 19:26221-26229. [PMID: 28932848 DOI: 10.1039/c7cp04837h] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A drastic reduction of the Pt loading in the cathode catalyst layers (CCLs) of proton exchange membrane fuel cells (PEMFCs) is much desired. However, a decrease in Pt loading inevitably leads to an unexpected increase of local O2 transport resistance (rLocal) and severely weakens the fuel cell performance, particularly at high current densities. Thus, it is both urgent and meaningful to explore the impacts of the operating conditions on rLocal in CCLs and therefore to clarify the intrinsic mechanism. Herein, we systematically explore the influences of the operating conditions, in terms of the dry O2 mole fraction, the relative humidity, the operating pressure and the temperature on rLocal using limiting current measurements combined with mathematical calculations. The results show that, in contrary to the established rules, rLocal in CCLs of PEMFCs is aggravated when the dry O2 mole fraction or the operating pressure are increased. It is also experimentally found that rLocal in CCLs is alleviated with the increase in the relative humidity or the operating temperature. Moreover, an adsorption controlled solution-diffusion model is proposed to illuminate the local O2 transport behavior in CCLs of PEMFCs, and it accounts for the influence of the dry O2 mole fraction on rLocal in CCLs.
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Affiliation(s)
- Shuiyun Shen
- Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, China.
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