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Belenov S, Mauer D, Moguchikh E, Gavrilova A, Nevelskaya A, Beskopylny E, Pankov I, Nikulin A, Alekseenko A. New Approach to Synthesizing Cathode PtCo/C Catalysts for Low-Temperature Fuel Cells. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:856. [PMID: 38786812 PMCID: PMC11124439 DOI: 10.3390/nano14100856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/11/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
The presented study is concerned with a new multi-step method to synthesize PtCo/C materials based on composite CoxOy/C that combines the advantages of different liquid-phase synthesis methods. Based on the results of studying the materials at each stage of synthesis with the TG, XRD, TEM, SEI, TXRF, CV and LSV methods, a detailed overview of the sequential changes in catalyst composition and structure at each stage of the synthesis is presented. The PtCo/C catalyst synthesized with the multi-step method is characterized by a uniform distribution of bimetallic nanoparticles of about 3 nm in size over the surface of the support, which result in its high ESA and ORR activity. The activity study for the synthesized PtCo/C catalyst in an MEA showed better current-voltage characteristics and a higher maximum specific power compared with an MEA based on a commercial Pt/C catalyst. Therefore, the results of the presented study demonstrate high prospects for the developed approach to the multi-step synthesis of PtM/C catalysts, which may enhance the characteristics of proton-exchange membrane fuel cells (PEMFCs).
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Affiliation(s)
- Sergey Belenov
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
| | - Dmitriy Mauer
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
| | - Elizabeth Moguchikh
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
| | - Anna Gavrilova
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
| | - Alina Nevelskaya
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Federal Research Center “The Southern Scientific Center of the Russian Academy of Sciences” (SSC RAS), Federal State Budgetary Institution of Science, 41 Chekhova St., Rostov-on-Don 344006, Russia;
| | - Egor Beskopylny
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
| | - Ilya Pankov
- Research Institute of Physical Organic Chemistry, Southern Federal University, 194/2 Stachki St., Rostov-on-Don 344090, Russia;
| | - Aleksey Nikulin
- Federal Research Center “The Southern Scientific Center of the Russian Academy of Sciences” (SSC RAS), Federal State Budgetary Institution of Science, 41 Chekhova St., Rostov-on-Don 344006, Russia;
| | - Anastasia Alekseenko
- Faculty of Chemistry, Southern Federal University, 7 Zorge St., Rostov-on-Don 344090, Russia; (D.M.); (E.M.); (A.G.); (A.N.); (E.B.); (A.A.)
- Prometheus R&D LLC, 4G/36 Zhmaylova St., Rostov-on-Don 344091, Russia
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Zhou Y, Chen J, Huang Z, Peng Y, Xing L, Tang C, Wang N, Meng L, Wu M, Du L, Ye S. Unraveling a volcanic relationship of Co/N/C@Pt xCo catalysts toward oxygen electro-reduction. NANOSCALE 2024; 16:5215-5221. [PMID: 38372788 DOI: 10.1039/d3nr06647a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
The cathodic oxygen reduction reaction (ORR) has been continuously attracting worldwide interest due to the increasing popularity of proton exchange membrane (PEM) fuel cells. So far, various Pt-group metal (PGM) or PGM-free catalysts have been developed to facilitate the ORR. However, there is still a gap to achieve the expected goals as proposed by the U.S. Department of Energy (DoE). Recently, PGM-free@PGM hybrid catalysts, such as the M/N/C@PtM catalyst, have achieved the milestones of oxygen reduction, as reviewed in our recent work. It is, nevertheless, still challenging to unravel the underlying structure-property relationships. Here, by applying different Pt/Co ratios, a series of Co/N/C@PtxCo catalysts are synthesized. Interestingly, the ORR activity and stability are not linear with the Pt content, but show a volcano-like curve with increased Pt usage. This relationship has been deeply unraveled to be closely related to the contents of pyrrolic N, pyridinic N, and graphitized carbon in catalysts. This work provides guidelines to rationally design the coupled PGM-free@PGM catalysts toward the ORR by appropriate surface engineering.
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Affiliation(s)
- Yangdong Zhou
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Junda Chen
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Zhiyin Huang
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Yuqin Peng
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Lixin Xing
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Chunmei Tang
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Ning Wang
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Ling Meng
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Mingjie Wu
- State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, P. R. China.
| | - Lei Du
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
| | - Siyu Ye
- Huangpu Hydrogen Energy Innovation Centre/School of Chemistry and Chemical Engineering, Guangzhou University, Wai Huan Xi Road 230, Guangzhou 510006, P. R. China.
- SinoHykey Technology Company Ltd., 8 Hongyuan Road, Huangpu District, Guangzhou 510760, P. R. China
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Yu H, Zachman MJ, Reeves KS, Park JH, Kariuki NN, Hu L, Mukundan R, Neyerlin KC, Myers DJ, Cullen DA. Tracking Nanoparticle Degradation across Fuel Cell Electrodes by Automated Analytical Electron Microscopy. ACS NANO 2022; 16:12083-12094. [PMID: 35867353 PMCID: PMC9413405 DOI: 10.1021/acsnano.2c02307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nanoparticles are an important class of materials that exhibit special properties arising from their high surface area-to-volume ratio. Scanning transmission electron microscopy (STEM) has played an important role in nanoparticle characterization, owing to its high spatial resolution, which allows direct visualization of composition and morphology with atomic precision. This typically comes at the cost of sample size, potentially limiting the accuracy and relevance of STEM results, as well as the ability to meaningfully track changes in properties that vary spatially. In this work, automated STEM data acquisition and analysis techniques are employed that enable physical and compositional properties of nanoparticles to be obtained at high resolution over length scales on the order of microns. This is demonstrated by studying the localized effects of potential cycling on electrocatalyst degradation across proton exchange membrane fuel cell cathodes. In contrast to conventional, manual STEM measurements, which produce particle size distributions representing hundreds of particles, these high-throughput automated methods capture tens of thousands of particles and enable nanoparticle size, number density, and composition to be measured as a function of position within the cathode. Comparing the properties of pristine and degraded fuel cells provides statistically robust evidence for the inhomogeneous nature of catalyst degradation across electrodes. These results demonstrate how high-throughput automated STEM techniques can be utilized to investigate local phenomena occurring in nanoparticle systems employed in practical devices.
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Affiliation(s)
- Haoran Yu
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Michael J. Zachman
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Kimberly S. Reeves
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jae Hyung Park
- Chemical
Sciences and Engineering Division, Argonne
National Laboratory, Lemont, Illinois 60439, United States
| | - Nancy N. Kariuki
- Chemical
Sciences and Engineering Division, Argonne
National Laboratory, Lemont, Illinois 60439, United States
| | - Leiming Hu
- Chemistry
and Nanoscience Center, National Renewable
Energy Laboratory, Golden, Colorado 80401, United States
| | - Rangachary Mukundan
- Materials
Physics and Applications Division, Los Alamos
National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Kenneth C. Neyerlin
- Chemistry
and Nanoscience Center, National Renewable
Energy Laboratory, Golden, Colorado 80401, United States
| | - Deborah J. Myers
- Chemical
Sciences and Engineering Division, Argonne
National Laboratory, Lemont, Illinois 60439, United States
| | - David A. Cullen
- Center
for Nanophase Materials Sciences, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
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Sharif HMA, Mahmood A, Djellabi R, Cheng HY, Dong H, Ajibade FO, Ali I, Yang B, Wang AJ. Utilization of electrochemical treatment and surface reconstruction to achieve long lasting catalyst for NO x removal. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123440. [PMID: 33113717 DOI: 10.1016/j.jhazmat.2020.123440] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/23/2020] [Accepted: 07/05/2020] [Indexed: 06/11/2023]
Abstract
The development of catalysts has seen tremendous growth recently but most strategies only report utilization of catalysts for a few initial cycles without taking into account the influence of oxygen poisoning. Here, the magnetic Fe3O4@EDTA-Fe (MEFe, having a core Fe3O4 particle with EDTA-Fe coating) was investigated as a model catalyst for long-term recycling for the removal of nitrogen oxide (NOx) from NO/O2 mixture, followed by N2O recovery. The concentration of oxygen in the flue gas was found to have a strong impact on NOx absorption and catalytic response. To circumvent the oxygen poisoning, the MEFe was subjected to electrochemical treatment in the presence of neutral red (N.R.) and NO removal efficiency was ∼95 % noted. Furthermore, the surface of the catalyst degraded significantly (p < 0.05) after 6-7 repetitive cycling due to surface catalytic reactions, surface poisoning, oxidation of metallic species as well as residual stresses. The MEFe surface was reconstructed after 7 cycles using EDTA solution and Fe source to achieve similar surface coating as the fresh MEFe catalyst. The reconstructed MEFe exhibited similar NOx absorption capability as the fresh MEFe and the reconstruction loop was repeated several times to achieve long term cycling, which make the catalyst cost-effective. Hence, it is proposed that a successful regeneration process can be employed for promising, sustainable and long-lasting catalytic treatment of air pollutants.
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Affiliation(s)
- Hafiz Muhammad Adeel Sharif
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; Department of Environmental Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, PR China
| | - Asif Mahmood
- School of Chemical and Biomolecular Engineering, The University of Sydney, Australia
| | - Ridha Djellabi
- Department of Environmental Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, PR China; Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Hao-Yi Cheng
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China.
| | - Heng Dong
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Fidelis Odedishemi Ajibade
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Imran Ali
- Department of Environmental Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, PR China
| | - Bo Yang
- Department of Environmental Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518055, PR China
| | - Ai-Jie Wang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China.
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Wu Y, Zhao M, Cao JP, Xu J, Jin T, Asao N. Amorphous/low-crystalline core/shell-type nanoparticles as highly efficient and self-stabilizing catalysts for alkaline hydrogen evolution. Chem Commun (Camb) 2020; 56:8984-8987. [PMID: 32638722 DOI: 10.1039/d0cc03016c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Amorphous/low-crystalline core/shell-type nanoparticles (Pd-P/Pt-Ni NPs) were prepared via a facile seed-mediated method. After acid treatment, the NPs exhibited self-improved catalysis for hydrogen evolution during electrolysis in an alkaline medium.
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Affiliation(s)
- Yanfang Wu
- Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), China University of Mining & Technology, Xuzhou 221116, P. R. China.
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A Comparative Study of Using Polarization Curve Models in Proton Exchange Membrane Fuel Cell Degradation Analysis. ENERGIES 2020. [DOI: 10.3390/en13153759] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In this paper, a systematic study is carried out to compare the performance of various V-I models at both normal and faulty conditions, in terms of simulating proton exchange membrane fuel cell (PEMFC) behavior and analyzing the corresponding degradation process. In the analysis, the simulation accuracy of V-I models, including overall behavior simulation and the simulation of different PEMFC losses, is investigated. Results show that compared to the other V-I models, the V-I model using exponential function for mass transport loss and considering open circuit voltage (OCV) at zero current can provide the best simulation performance, with an overall root mean square error (RMSE) of about 0.00279. Furthermore, the performance of these V-I models in analyzing PEMFC degradation process is also studied. By investigating the evolution of PEMFC losses during the degradation, the effectiveness of these models in interpreting PEMFC degradation mechanisms can be clarified. The results show that, besides the simulation accuracy, different interpretations may be provided from different models; this further confirms the necessity of comparative study. Moreover, the effectiveness of different V-I models in identifying PEMFC abnormal performance at two faulty scenarios is investigated. The results demonstrate that, among different V-I models, the model using an exponential function for mass transport loss and considering OCV at zero current can provide more accurate simulation and reasonable interpretation regarding PEMFC internal behavior.
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