1
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Shin SS, Jung Y, Jeon S, Park SJ, Yoon SJ, Jung KW, Choi JW, Lee JH. Efficient recovery and recycling/upcycling of precious metals using hydrazide-functionalized star-shaped polymers. Nat Commun 2024; 15:3889. [PMID: 38719796 PMCID: PMC11079046 DOI: 10.1038/s41467-024-48090-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 04/19/2024] [Indexed: 05/12/2024] Open
Abstract
There is a growing demand for adsorption technologies for recovering and recycling precious metals (PMs) in various industries. Unfortunately, amine-functionalized polymers widely used as metal adsorbents are ineffective at recovering PMs owing to their unsatisfactory PM adsorption performance. Herein, a star-shaped, hydrazide-functionalized polymer (S-PAcH) is proposed as a readily recoverable standalone adsorbent with high PM adsorption performance. The compact chain structure of S-PAcH containing numerous hydrazide groups with strong reducibility promotes PM adsorption by enhancing PM reduction while forming large, collectable precipitates. Compared with previously reported PM adsorbents, commercial amine polymers, and reducing agents, S-PAcH exhibited significantly higher adsorption capacity, selectivity, and kinetics toward three PMs (gold, palladium, and platinum) with model, simulated, and real-world feed solutions. The superior PM recovery performance of S-PAcH was attributed to its strong reduction capability combined with its chemisorption mechanism. Moreover, PM-adsorbed S-PAcH could be refined into high-purity PMs via calcination, directly utilized (upcycled) as catalysts for dye reduction, or regenerated for reuse, demonstrating its high practical feasibility. Our proposed PM adsorbents would have a tremendous impact on various industrial sectors from the perspectives of environmental protection and sustainable development.
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Affiliation(s)
- Seung Su Shin
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Youngkyun Jung
- Center for Water Cycle Research, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Sungkwon Jeon
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Sung-Joon Park
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Su-Jin Yoon
- Center for Water Cycle Research, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Kyung-Won Jung
- Center for Water Cycle Research, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Jae-Woo Choi
- Center for Water Cycle Research, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea.
- Division of Energy & Environment Technology, KIST School, Korea National University of Science and Technology, Seoul, 02792, Republic of Korea.
| | - Jung-Hyun Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea.
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2
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Wei K, Lin H, Zhao X, Zhao Z, Marinkovic N, Morales M, Huang Z, Perlmutter L, Guan H, Harris C, Chi M, Lu G, Sasaki K, Sun S. Au/Pt Bimetallic Nanowires with Stepped Pt Sites for Enhanced C-C Cleavage in C2+ Alcohol Electro-oxidation Reactions. J Am Chem Soc 2023; 145:19076-19085. [PMID: 37606196 DOI: 10.1021/jacs.3c07027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Efficient C-C bond cleavage and oxidation of alcohols to CO2 is the key to developing highly efficient alcohol fuel cells for renewable energy applications. In this work, we report the synthesis of core/shell Au/Pt nanowires (NWs) with stepped Pt clusters deposited along the ultrathin (2.3 nm) stepped Au NWs as an active catalyst to effectively oxidize alcohols to CO2. The catalytic oxidation reaction is dependent on the Au/Pt ratios, and the Au1.0/Pt0.2 NWs have the largest percentage (∼75%) of stepped Au/Pt sites and show the highest activity for ethanol electro-oxidation, reaching an unprecedented 196.9 A/mgPt (32.5 A/mgPt+Au). This NW catalyst is also active in catalyzing the oxidation of other primary alcohols, such as methanol, n-propanol, and ethylene glycol. In situ X-ray absorption spectroscopy and infrared spectroscopy are used to characterize the catalyst structure and to identify key reaction intermediates, providing concrete evidence that the synergy between the low-coordinated Pt sites and the stepped Au NWs is essential to catalyze the alcohol oxidation reaction, which is further supported by DFT calculations that the C-C bond cleavage is indeed enhanced on the undercoordinated Pt-Au surface. Our study provides important evidence that a core/shell structure with stepped core/shell sites is essential to enhance electrochemical oxidation of alcohols and will also be central to understanding electro-oxidation reactions and to the future development of highly efficient direct alcohol fuel cells for renewable energy applications.
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Affiliation(s)
- Kecheng Wei
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Honghong Lin
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Xueru Zhao
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Zhonglong Zhao
- School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China
| | - Nebojsa Marinkovic
- Department of Chemical Engineering, Columbia University, New York, New York 10027, United States
| | - Michael Morales
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Zhennan Huang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Laura Perlmutter
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Huanqin Guan
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Cooro Harris
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Gang Lu
- Department of Physics and Astronomy, California State University Northridge, Northridge, California 91330, United States
| | - Kotaro Sasaki
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Shouheng Sun
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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3
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Geng WC, Li JJ, Sang JL, Xia YX, Li YJ. Engineering composition-varied Au/PtTe hetero-junction-abundant nanotrough arrays as robust electrocatalysts for ethanol electrooxidation. J Colloid Interface Sci 2023; 646:616-624. [PMID: 37210909 DOI: 10.1016/j.jcis.2023.05.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 04/28/2023] [Accepted: 05/04/2023] [Indexed: 05/23/2023]
Abstract
Pt-based multi-metallic electrocatalysts containing hetero-junctions are found to have superior catalytic performance to composition-equivalent counterparts. However, in bulk solution, controllable preparation of Pt-based hetero-junction electrocatalyst is an extremely random work owing to the complexity of solution reactions. Herein, we develop an interface-confined transformation strategy, subtly achieving Au/PtTe hetero-junction-abundant nanostructures by employing interfacial Te nanowires as sacrificing templates. By controlling the reaction conditions, composition-varied Au/PtTe can be easily obtained, such as Au75/Pt20Te5, Au55/Pt34Te11, and Au5/Pt69Te26. Moreover, each Au/PtTe hetero-junction nanostructure appears to be an array consisting of side-by-side Au/PtTe nanotrough units and can be directly used as a catalyst layer without further post-treatment. All Au/PtTe hetero-junction nanostructures show better catalytic activity towards ethanol electrooxidation than commercial Pt/C because of the combining contributions of Au/Pt hetero-junctions and the collective effects of multi-metallic elements, where Au75/Pt20Te5 exhibits the best electrocatalytic performance among three Au/PtTe nanostructures owing to its optimal composition. This study may provide technically feasible guidance for further maximizing the catalytic activity of Pt-based hybrid catalysts.
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Affiliation(s)
- Wen-Chao Geng
- State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China; School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou 450000, China
| | - Jing-Jing Li
- State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Ji-Long Sang
- State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yu-Xin Xia
- State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yong-Jun Li
- State Key Lab of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
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4
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Kong F, Liu X, Song Y, Qian Z, Li J, Zhang L, Yin G, Wang J, Su D, Sun X. Selectively Coupling Ru Single Atoms to PtNi Concavities for High‐Performance Methanol Oxidation via
d
‐Band Center Regulation. Angew Chem Int Ed Engl 2022; 61:e202207524. [DOI: 10.1002/anie.202207524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Fanpeng Kong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage Harbin Institute of Technology Harbin China
- Department of Mechanical and Materials Engineering University of Western Ontario London Canada
| | - Xiaozhi Liu
- Institute of Physics Chinese Academy of Sciences Beijing China
| | - Yajie Song
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage Harbin Institute of Technology Harbin China
| | - Zhengyi Qian
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage Harbin Institute of Technology Harbin China
| | - Junjie Li
- Department of Mechanical and Materials Engineering University of Western Ontario London Canada
| | - Lei Zhang
- Department of Mechanical and Materials Engineering University of Western Ontario London Canada
| | - Geping Yin
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage Harbin Institute of Technology Harbin China
| | - Jiajun Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage Harbin Institute of Technology Harbin China
- Chongqing Research Institute Harbin Institute of Technology Chongqing China
| | - Dong Su
- Institute of Physics Chinese Academy of Sciences Beijing China
| | - Xueliang Sun
- Department of Mechanical and Materials Engineering University of Western Ontario London Canada
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5
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Kong F, Liu X, Song Y, Qian Z, Li J, Zhang L, Yin G, Su D, Wang J, Sun X. Selectively Coupling Ru Single Atoms to PtNi Concavities for High Performance Methanol Oxidation via d‐Band Center Regulation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Fanpeng Kong
- Harbin Institute of Technology MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage No. 92, Xidazhi street 150000 Harbin CHINA
| | - Xiaozhi Liu
- Chinese Academy of Sciences Institute of Physics CHINA
| | - Yajie Song
- Harbin Institute of Technology MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage CHINA
| | - Zhengyi Qian
- Harbin Institute of Technology MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage CHINA
| | - Junjie Li
- Western University Department of Mechanical and Materials Engineering CANADA
| | - Lei Zhang
- Western University Department of Mechanical and Materials Engineering CANADA
| | - Geping Yin
- Harbin Institute of Technology MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage CHINA
| | - Dong Su
- Chinese Academy of Sciences Institute of Physics CANADA
| | - Jiajun Wang
- Harbin Institute of Technology MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage CHINA
| | - Xueliang Sun
- Western University 1151 Richmond Street N6A 3K7 London CANADA
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6
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Du J, Quinson J, Zhang D, Wang B, Wiberg GKH, Pittkowski RK, Schröder J, Simonsen SB, Kirkensgaard JJK, Li Y, Reichenberger S, Barcikowski S, Jensen KMØ, Arenz M. Nanocomposite Concept for Electrochemical In Situ Preparation of Pt-Au Alloy Nanoparticles for Formic Acid Oxidation. JACS AU 2022; 2:1757-1768. [PMID: 35911453 PMCID: PMC9327087 DOI: 10.1021/jacsau.2c00335] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Herein, we report a straightforward approach for the in situ preparation of Pt-Au alloy nanoparticles from Pt + xAu/C nanocomposites using monometallic colloidal nanoparticles as starting blocks. Four different compositions with fixed Pt content and varying Pt to Au mass ratios from 1:1 up to 1:7 were prepared as formic acid oxidation reaction (FAOR) catalysts. The study was carried out in a gas diffusion electrode (GDE) setup. It is shown that the presence of Au in the nanocomposites substantially improves the FAOR activity with respect to pure Pt/C, which serves as a reference. The nanocomposite with a mass ratio of 1:5 between Pt and Au displays the best performance during potentiodynamic tests, with the electro-oxidation rates, overpotential, and poisoning resistance being improved simultaneously. By comparison, too low or too high Au contributions in the nanocomposites lead to an unbalanced performance in the FAOR. The combination of operando small-angle X-ray scattering (SAXS), scanning transmission electron microscopy (STEM) elemental mapping, and wide-angle X-ray scattering (WAXS) reveals that for the nanocomposite with a 1:5 mass ratio, a conversion between Pt and Au from separate nanoparticles to alloy nanoparticles occurs during continuous potential cycling in formic acid. By comparison, the nanocomposites with lower Au contents, for example, 1:2, exhibit less in situ alloying, and the concomitant performance improvement is less pronounced. On applying identical location transmission electron microscopy (IL-TEM), it is revealed that the in situ alloying is due to Pt dissolution and re-deposition onto Au as well as Pt migration and coalescence with Au nanoparticles.
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Affiliation(s)
- Jia Du
- Department of Chemistry,
Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Jonathan Quinson
- Department of Chemistry, University of
Copenhagen, 2100 Copenhagen, Denmark
- Department of Biochemical and Chemical Engineering, University of Aarhus, 8200 Aarhus, Denmark
| | - Damin Zhang
- Department of Chemistry,
Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Baiyu Wang
- Department of Chemistry, University of
Copenhagen, 2100 Copenhagen, Denmark
| | - Gustav K. H. Wiberg
- Department of Chemistry,
Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland
| | | | - Johanna Schröder
- Department of Chemistry,
Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Søren B. Simonsen
- Department of Energy
Conversion and Storage, Technical University
of Denmark, 2800 Lyngby, Denmark
| | - Jacob J. K. Kirkensgaard
- Department of Food
Science, University of Copenhagen, 1958 Frederiksberg, Denmark
- Niels-Bohr-Institute, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Yao Li
- Technical Chemistry I and Center of Nanointegration Duisburg Essen
(CENIDE), University of Duisburg-Essen, 45141 Essen, Germany
| | - Sven Reichenberger
- Technical Chemistry I and Center of Nanointegration Duisburg Essen
(CENIDE), University of Duisburg-Essen, 45141 Essen, Germany
| | - Stephan Barcikowski
- Technical Chemistry I and Center of Nanointegration Duisburg Essen
(CENIDE), University of Duisburg-Essen, 45141 Essen, Germany
| | | | - Matthias Arenz
- Department of Chemistry,
Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland
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7
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Li M, Zhao Z, Zhang W, Luo M, Tao L, Sun Y, Xia Z, Chao Y, Yin K, Zhang Q, Gu L, Yang W, Yu Y, Lu G, Guo S. Sub-Monolayer YO x /MoO x on Ultrathin Pt Nanowires Boosts Alcohol Oxidation Electrocatalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2103762. [PMID: 34423488 DOI: 10.1002/adma.202103762] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/28/2021] [Indexed: 06/13/2023]
Abstract
A crucial issue restricting the application of direct alcohol fuel cells (DAFCs) is the low activity of Pt-based electrocatalysts for alcohol oxidation reaction caused by the reaction intermediate (CO*) poisoning. Herein, a new strategy is demonstrated for making a class of sub-monolayer YOx /MoOx -surface co-decorated ultrathin platinum nanowires (YOx /MoOx -Pt NWs) to effectively eliminate the CO poisoning for enhancing methanol oxidation electrocatalysis. By adjusting the amounts of YOx and MoOx decorated on the surface of ultrathin Pt NWs, the optimized 22% YOx /MoOx -Pt NWs achieve a high specific activity of 3.35 mA cm-2 and a mass activity of 2.10 A mgPt -1 , as well as the enhanced stability. In situ Fourier transform infrared (FTIR) spectroscopy and CO stripping studies confirm the contribution of YOx and MoOx to anti-CO poisoning ability of the NWs. Density functional theory (DFT) calculations further reveal that the surface Y and Mo atoms with oxidation states allow COOH* to bind the surface through both the carbon and oxygen atoms, which can lower the free energy barriers for the oxidation of CO* into COOH*. The optimal NWs also show the superior activities toward the electro-oxidation of ethanol, ethylene glycol, and glycerol.
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Affiliation(s)
- Menggang Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Zhonglong Zhao
- School of Physical Science and Technology, Inner Mongolia University, Hohhot, 010021, China
- Department of Physics and Astronomy, California State University Northridge, Northridge, CA, 91330, USA
| | - Weiyu Zhang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Mingchuan Luo
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Lu Tao
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Yingjun Sun
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Zhonghong Xia
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Yuguang Chao
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Kun Yin
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Weiwei Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | - Yongsheng Yu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | - Gang Lu
- Department of Physics and Astronomy, California State University Northridge, Northridge, CA, 91330, USA
| | - Shaojun Guo
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, China
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8
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PT-BI Co-Deposit Shell on AU Nanoparticle Core: High Performance and Long Durability for Formic Acid Oxidation. Catalysts 2021. [DOI: 10.3390/catal11091049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This work presents the catalysts of Pt-Bi shells on Au nanoparticle cores and Pt overlayers on the Pt-Bi shells toward formic acid oxidation (FAO). Pt and Bi were co-deposited on Au nanoparticles (Au NP) via the irreversible adsorption method using a mixed precursor solution of Pt and Bi ions, and the amount of the co-deposits was controlled with the repetition of the deposition cycle. Rinsing of the co-adsorbed ionic layers of Pt and Bi with a H2SO4 solution selectively removed the Bi ions to leave Pt-rich and Bi-lean (<0.4 atomic %) co-deposits on Au NP (Pt-Bi/Au NP), conceptually similar to de-alloying. Additional Pt was deposited over Pt-Bi/Au NPs (Pt/Pt-Bi/Au NPs) to manipulate further the physicochemical properties of Pt-Bi/Au NPs. Transmission electron microscopy revealed the core–shell structures of Pt-Bi/Au NPs and Pt/Pt-Bi/Au NPs, whose shell thickness ranged from roughly four to six atomic layers. Moreover, the low crystallinity of the Pt-containing shells was confirmed with X-ray diffraction. Electrochemical studies showed that the surfaces of Pt-Bi/Au NPs were characterized by low hydrogen adsorption abilities, which increased after the deposition of additional Pt. Durability tests were carried out with 1000 voltammetric cycles between −0.26 and 0.4 V (versus Ag/AgCl) in a solution of 1.0 M HCOOH + 0.1 M H2SO4. The initial averaged FAO performance on Pt-Bi/Au NPs and Pt/Pt-Bi/Au NPs (0.11 ± 0.01 A/mg, normalized to the catalyst weight) was higher than that of a commercial Pt nanoparticle catalyst (Pt NP, 0.023 A/mg) by a factor of ~5, mainly due to enhancement of dehydrogenation and suppression of dehydration. The catalytic activity of Pt/Pt-Bi/Au NP (0.04 ± 0.01 A/mg) in the 1000th cycle was greater than that of Pt-Bi/Au NP (0.026 ± 0.003 A/mg) and that of Pt NP (0.006 A/mg). The reason for the higher durability was suggested to be the low mobility of surface Pt atoms on the investigated catalysts.
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9
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Wen X, Yin S, Yin H, Ding Y. A displacement dealloying route to dilute nanoporous PtAu alloys for highly active formic acid electro-oxidation. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137884] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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10
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Yin S, Ding Y. Bimetallic PtAu electrocatalysts for the oxygen reduction reaction: challenges and opportunities. Dalton Trans 2020; 49:4189-4199. [PMID: 32191785 DOI: 10.1039/d0dt00205d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly active, durable oxygen reduction reaction (ORR) electrocatalysts have an essential role in promoting the continuous operation of advanced energy technologies such as fuel cells and metal-air batteries. Considering the scarce reserve of Pt and its unsatisfactory overall performance, there is an urgent demand for the development of new generation ORR electrocatalysts that are substantially better than the state-of-the-art supported Pt-based nanocatalysts, such as Pt/C. Among various nanostructures, bimetallic PtAu represents one unique alloy system where highly contradictory performance has been reported. While it is generally accepted that Au may contribute to stabilizing Pt, its role in modulating the intrinsic activity of Pt remains unclear. This perspective will discuss critical structural issues that affect the intrinsic ORR activities of bimetallic PtAu, with an eye on elucidating the origin of seemingly inconsistent experimental results from the literature. As a relatively new class of electrodes, we will also highlight the performance of dealloyed nanoporous gold (NPG) based electrocatalysts, which allow a unique combination of structural properties highly desired for this important reaction. Finally, we will put forward the challenges and opportunities for the incorporation of these advanced electrocatalysts into membrane electrode assemblies (MEA) for actual fuel cells.
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Affiliation(s)
- Shuai Yin
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Yi Ding
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China.
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11
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Ultrathin Film PtxPd(1-x) Alloy Catalysts for Formic Acid Oxidation Synthesized by Surface Limited Redox Replacement of Underpotentially Deposited H Monolayer. ELECTROCHEM 2020. [DOI: 10.3390/electrochem1010002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This work emphasizes the development of a green synthetic approach for growing ultrathin film PtxPd(1-x) alloy catalysts for formic acid oxidation (FAO) by surface limited redox replacement of underpotentially deposited H sacrificial layer. Up to three-monolayers-thick PtxPd(1-x) films with different composition are generated on Au electrodes and characterized for composition and surface roughness using XPS and electrochemical methods, respectively. XPS results show close correlation between solution molar ratio and atomic composition, with slightly higher Pt fraction in the deposited films. The accordingly deposited Pt42Pd58 films demonstrated remarkable specific and mass activities of up to 35 mAcm−2 and 45 Amg−1 respectively, lasting for more than 1500 cycles in FAO tests. This performance, found to be better twice or more than that of pure Pt counterparts, renders the Pt42Pd58 films comparable with the frontrunner FAO catalysts. In addition, the best alloy catalyst establishes a nearly hysteresis-free FAO CV curve a lot earlier than its Pt counterpart and thus supports the direct FAO pathway for longer. Overall, the combination of high Pd activity and CO tolerance with the remarkable Pt stability results in highly active and durable FAO catalysts. Finally, this facile and cost-effective synthetic approach allows for scaling the catalyst production and is thus appropriate for foreseeable commercialization.
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12
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Sun W, Du L, Tan Q, Zhou J, Hu Y, Du C, Gao Y, Yin G. Engineering of Nitrogen Coordinated Single Cobalt Atom Moieties for Oxygen Electroreduction. ACS APPLIED MATERIALS & INTERFACES 2019; 11:41258-41266. [PMID: 31603640 DOI: 10.1021/acsami.9b11830] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The nitrogen coordinated single cobalt atoms embedded in carbon matrix, i.e., Co/N/C material, is cost-efficient and free from iron-ion induced Fenton reagent, which has been thus considered as a promising candidate to replace the well-accepted Pt-based and Fe/N/C materials for oxygen reduction reaction (ORR). Recently, the pyrolysis of metal-organic framework (MOF) precursors has been investigated to achieve well-defined Co/N/C catalysts with high ORR activity. However, the relationships among the composition/structure of MOF precursor, the derived catalysts, and ORR performance have been rarely touched in specialty, while the regulations to achieve single-atom Co/N/C catalysts derived from MOF are confusing. Herein, we engineer several Co-doped MOF (zeolitic imidazolate frameworks, to be specific) precursors with different compositions and structures by tuning synthesis protocols (e.g., ratios, cobalt sources, and reaction time) and investigate the derived catalysts and their ORR properties. The regulations to single-atom Co/N/C are revealed in this work. The superior ORR activity and durability of the optimized Co/N/C catalysts are revealed and attributed to the well-defined Co-Nx moieties and their stable nanostructures.
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Affiliation(s)
- Wei Sun
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage , Harbin Institute of Technology , Harbin 150001 , China
| | - Lei Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage , Harbin Institute of Technology , Harbin 150001 , China
| | - Qiang Tan
- State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering , Xi'an Jiaotong University , Xi'an 710049 , China
| | - Jigang Zhou
- Canadian Light Source Inc. , Saskatoon , Saskatchewan S7N 0X4 , Canada
| | - Yongfeng Hu
- Canadian Light Source Inc. , Saskatoon , Saskatchewan S7N 0X4 , Canada
| | - Chunyu Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage , Harbin Institute of Technology , Harbin 150001 , China
| | - Yunzhi Gao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage , Harbin Institute of Technology , Harbin 150001 , China
| | - Geping Yin
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage , Harbin Institute of Technology , Harbin 150001 , China
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13
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Mello GAB, Busó-Rogero C, Herrero E, Feliu JM. Glycerol electrooxidation on Pd modified Au surfaces in alkaline media: Effect of the deposition method. J Chem Phys 2019; 150:041703. [DOI: 10.1063/1.5048489] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Gisele A. B. Mello
- Instituto de Electroquímica, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain
- Curso de Licenciatura em Química, Instituto de Ciências da Educação, Universidade Federal do Oeste do Pará, Avenida Marechal Rondon, s/n, 68040-070 Santarém, PA, Brazil
| | - Carlos Busó-Rogero
- Instituto de Electroquímica, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain
| | - Enrique Herrero
- Instituto de Electroquímica, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain
| | - J. M. Feliu
- Instituto de Electroquímica, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain
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14
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Huang L, Zhang X, Wang Q, Han Y, Fang Y, Dong S. Shape-Control of Pt–Ru Nanocrystals: Tuning Surface Structure for Enhanced Electrocatalytic Methanol Oxidation. J Am Chem Soc 2018; 140:1142-1147. [DOI: 10.1021/jacs.7b12353] [Citation(s) in RCA: 355] [Impact Index Per Article: 59.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Liang Huang
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, P. R. China
- University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xueping Zhang
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Qingqing Wang
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, P. R. China
| | - Yujie Han
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, P. R. China
| | - Youxing Fang
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, P. R. China
| | - Shaojun Dong
- State
Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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