1
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Singh M, Sharma HM, Gupta RK, Kumar A. Recent advancements and prospects in noble and non-noble electrocatalysts for materials methanol oxidation reactions. DISCOVER NANO 2024; 19:128. [PMID: 39143373 PMCID: PMC11324629 DOI: 10.1186/s11671-024-04066-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 07/16/2024] [Indexed: 08/16/2024]
Abstract
The direct methanol fuel cell (DMFC) represents a highly promising alternative power source for small electronics and automobiles due to its low operating temperatures, high efficiency, and energy density. The methanol oxidation process (MOR) constitutes a fundamental chemical reaction occurring at the positive electrode of a DMFC. Pt-based materials serve as widely utilized MOR electrocatalysts in DMFCs. Nevertheless, various challenges, such as sluggish reaction rates, high production costs primarily attributed to the expensive Pt-based catalyst, and the adverse effects of CO poisoning on the Pt catalysts, hinder the commercialization of DMFCs. Consequently, endeavors to identify an alternative catalyst to Pt-based catalysts that mitigate these drawbacks represent a critical focal point of DMFC research. In pursuit of this objective, researchers have developed diverse classes of MOR electrocatalysts, encompassing those derived from noble and non-noble metals. This review paper delves into the fundamental concept of MOR and its operational mechanisms, as well as the latest advancements in electrocatalysts derived from noble and non-noble metals, such as single-atom and molecule catalysts. Moreover, a comprehensive analysis of the constraints and prospects of MOR electrocatalysts, encompassing those based on noble metals and those based on non-noble metals, has been undertaken.
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Affiliation(s)
- Monika Singh
- Department of Chemistry, GLA University, Mathura-281406, India
| | | | - Ram K Gupta
- Department of Chemistry, Pittsburg State University, Pittsburg, KS, 66762, USA.
- National Institute of Material Advancement, Pittsburg, KS, 66762, USA.
| | - Anuj Kumar
- Department of Chemistry, GLA University, Mathura-281406, India.
- National Institute of Material Advancement, Pittsburg, KS, 66762, USA.
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2
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Tomassetti M, Marini F, Pezzilli R, Castrucci M, Di Natale C, Campanella L. Improvement of Qualitative Analyses of Aliphatic Alcohols Using Direct Catalytic Fuel Cell and Chemometric Analysis Format. SENSORS (BASEL, SWITZERLAND) 2024; 24:3209. [PMID: 38794063 PMCID: PMC11124824 DOI: 10.3390/s24103209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/15/2024] [Accepted: 05/16/2024] [Indexed: 05/26/2024]
Abstract
Direct catalytic methanol fuel cells (DCMFCs) have been studied for several years for energy conversion. Less extensive is the investigation of their analytical properties. In this paper, we demonstrate that the behavior of both the discharge and charger curves of DCMFCs depends on the chemical composition of the solution injected in the fuel cell. Their discharge and charge curves, analyzed using a chemometric data fusion method named ComDim, enable the identification of various types of aliphatic alcohols diluted in water. The results also show that the identification of alcohols can be obtained from the first portion of the discharge and charge curves. To this end, the curves have been described by a set of features related to the slope and intercept of the initial portion of the curves. The ComDim analysis of this set of features shows that the identification of alcohols can be obtained in a time that is about thirty times shorter than the time taken to achieve steady-state voltage.
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Affiliation(s)
- Mauro Tomassetti
- Department of Chemistry, University of Rome, “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy; (M.C.); (L.C.)
| | - Federico Marini
- Department of Chemistry, University of Rome, “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy; (M.C.); (L.C.)
| | - Riccardo Pezzilli
- Department of Industrial Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy;
| | - Mauro Castrucci
- Department of Chemistry, University of Rome, “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy; (M.C.); (L.C.)
| | - Corrado Di Natale
- Department of Electronic Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy;
| | - Luigi Campanella
- Department of Chemistry, University of Rome, “La Sapienza”, P.le A. Moro 5, 00185 Rome, Italy; (M.C.); (L.C.)
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3
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Hsueh JW, Kuo LH, Chen PH, Chen WH, Chuang CY, Kuo CN, Lue CS, Lai YL, Liu BH, Wang CH, Hsu YJ, Lin CL, Chou JP, Luo MF. Investigating the role of undercoordinated Pt sites at the surface of layered PtTe 2 for methanol decomposition. Nat Commun 2024; 15:653. [PMID: 38253575 PMCID: PMC10803346 DOI: 10.1038/s41467-024-44840-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Transition metal dichalcogenides, by virtue of their two-dimensional structures, could provide the largest active surface for reactions with minimal materials consumed, which has long been pursued in the design of ideal catalysts. Nevertheless, their structurally perfect basal planes are typically inert; their surface defects, such as under-coordinated atoms at the surfaces or edges, can instead serve as catalytically active centers. Here we show a reaction probability > 90 % for adsorbed methanol (CH3OH) on under-coordinated Pt sites at surface Te vacancies, produced with Ar+ bombardment, on layered PtTe2 - approximately 60 % of the methanol decompose to surface intermediates CHxO (x = 2, 3) and 35 % to CHx (x = 1, 2), and an ultimate production of gaseous molecular hydrogen, methane, water and formaldehyde. The characteristic reactivity is attributed to both the triangular positioning and varied degrees of oxidation of the under-coordinated Pt at Te vacancies.
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Affiliation(s)
- Jing-Wen Hsueh
- Department of Physics, National Central University, No. 300 Jhongda Rd., Jhongli District, Taoyuan City, 320317, Taiwan
| | - Lai-Hsiang Kuo
- Department of Physics, National Central University, No. 300 Jhongda Rd., Jhongli District, Taoyuan City, 320317, Taiwan
| | - Po-Han Chen
- Department of Materials Science and Engineering, National Tsing Hua University, 101, Section 2 Kuang-Fu Road, Hsinchu, 300044, Taiwan
| | - Wan-Hsin Chen
- Department of Electrophysics, National Yang Ming Chiao Tung University, No. 1001 University Rd., Hsinchu, 300039, Taiwan
| | - Chi-Yao Chuang
- Department of Electrophysics, National Yang Ming Chiao Tung University, No. 1001 University Rd., Hsinchu, 300039, Taiwan
| | - Chia-Nung Kuo
- Department of Physics, National Cheng Kung University, No. 1 University Rd., Tainan, 701, Taiwan
- Taiwan Consortium of Emergent Crystalline Materials, National Science and Technology Council, Taipei, 10601, Taiwan
| | - Chin-Shan Lue
- Department of Physics, National Cheng Kung University, No. 1 University Rd., Tainan, 701, Taiwan
- Taiwan Consortium of Emergent Crystalline Materials, National Science and Technology Council, Taipei, 10601, Taiwan
- Program on Key Materials, Academy of Innovative Semiconductor and Sustainable Manufacturing, National Cheng Kung University, Tainan, 701, Taiwan
| | - Yu-Ling Lai
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Rd., Hsinchu Science Park, Hsinchu, 300092, Taiwan
| | - Bo-Hong Liu
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Rd., Hsinchu Science Park, Hsinchu, 300092, Taiwan
| | - Chia-Hsin Wang
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Rd., Hsinchu Science Park, Hsinchu, 300092, Taiwan
| | - Yao-Jane Hsu
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Rd., Hsinchu Science Park, Hsinchu, 300092, Taiwan
| | - Chun-Liang Lin
- Department of Electrophysics, National Yang Ming Chiao Tung University, No. 1001 University Rd., Hsinchu, 300039, Taiwan.
| | - Jyh-Pin Chou
- Department of Physics, National Changhua University of Education, No. 1, Jin-De Rd., Changhua, 50007, Taiwan.
| | - Meng-Fan Luo
- Department of Physics, National Central University, No. 300 Jhongda Rd., Jhongli District, Taoyuan City, 320317, Taiwan.
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4
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Deshpande P, Prasad BLV. Alloying with Mn Enhances the Activity and Durability of the CoPt Catalyst toward the Methanol Oxidation Reaction. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37224303 DOI: 10.1021/acsami.3c01140] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
To improve the catalytic performance and durability of Pt catalysts used for the methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs), alloying of Pt with other transition metals such as Ru, Co, Ni, and Fe is considered an effective approach. Despite the significant progress made in the preparation of bimetallic alloys and their utilization for MOR, improving the activity and durability of the catalysts to make them commercially viable remains a stiff challenge. In this work, trimetallic Pt100-x(MnCo)x (16 < x < 41) catalysts were successfully synthesized via borohydride reduction followed by hydrothermal treatment at 150 °C. The electrocatalytic performance of the synthesized trimetallic Pt100-x(MnCo)x (16 < x < 41) catalysts toward MOR was studied using cyclic voltammetry and chronoamperometry. The results affirm that all Pt100-x(MnCo)x (16 < x < 41) alloys have superior MOR activity and durability as compared to bimetallic PtCo alloys and commercially available Pt/C (comm. Pt/C) catalysts. Among all the compositions studied, the Pt60Mn1.7Co38.3/C catalyst exhibited superior mass activity (1.3 and 1.9 times higher than those of Pt81Co19/C and comm. Pt/C, respectively) toward MOR. Furthermore, all the newly synthesized Pt100-x(MnCo)x/C (16 < x < 41) catalysts showed better CO tolerance when compared with comm. Pt/C. This improved performance of the Pt100-x(MnCo)x/C (16 < x < 41) catalyst can be attributed to the synergistic effect of Co and Mn on the Pt lattice.
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Affiliation(s)
- Pooja Deshpande
- Physical and Materials Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad 201002, India
| | - Bhagavatula L V Prasad
- Physical and Materials Chemistry Division, National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad 201002, India
- Centre for Nano and Soft Matter Sciences, Arkavathi, Survey No.7 Shivanapura, Dasanapura Hobli, Bengaluru 562162, India
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5
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Wang Y, Zhang M, Liu Y, Zheng Z, Liu B, Chen M, Guan G, Yan K. Recent Advances on Transition-Metal-Based Layered Double Hydroxides Nanosheets for Electrocatalytic Energy Conversion. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2207519. [PMID: 36866927 PMCID: PMC10161082 DOI: 10.1002/advs.202207519] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/08/2023] [Indexed: 05/06/2023]
Abstract
Transition-metal-based layered double hydroxides (TM-LDHs) nanosheets are promising electrocatalysts in the renewable electrochemical energy conversion system, which are regarded as alternatives to noble metal-based materials. In this review, recent advances on effective and facile strategies to rationally design TM-LDHs nanosheets as electrocatalysts, such as increasing the number of active sties, improving the utilization of active sites (atomic-scale catalysts), modulating the electron configurations, and controlling the lattice facets, are summarized and compared. Then, the utilization of these fabricated TM-LDHs nanosheets for oxygen evolution reaction, hydrogen evolution reaction, urea oxidation reaction, nitrogen reduction reaction, small molecule oxidations, and biomass derivatives upgrading is articulated through systematically discussing the corresponding fundamental design principles and reaction mechanism. Finally, the existing challenges in increasing the density of catalytically active sites and future prospects of TM-LDHs nanosheets-based electrocatalysts in each application are also commented.
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Affiliation(s)
- Yuchen Wang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Man Zhang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yaoyu Liu
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Zhikeng Zheng
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Biying Liu
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
| | - Meng Chen
- Energy Conversion Engineering Laboratory, Institute of Regional Innovation (IRI), Hirosaki University, 3-Bunkyocho, Hirosaki, 036-8561, Japan
| | - Guoqing Guan
- Energy Conversion Engineering Laboratory, Institute of Regional Innovation (IRI), Hirosaki University, 3-Bunkyocho, Hirosaki, 036-8561, Japan
| | - Kai Yan
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
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6
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Zhang J, Yan L, Xue K, Wu J, Ku R, Ding YM, Dong H, Zhou L. Understanding Trends in Electrochemical Methanol Oxidation Reaction Activity on a Single Transition-Metal Atom Embedded in N-Coordinated Graphene Catalysts. J Phys Chem Lett 2023; 14:3384-3390. [PMID: 36995147 DOI: 10.1021/acs.jpclett.2c03874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
The lack of efficient catalysts and research on the mechanism for the methanol oxidation reaction (MOR) impedes the development of direct methanol fuel cells. In this work, based on density functional theory calculations, we systematically investigated the activity trends of electrochemical MOR on a single transition-metal atom embedded in N-coordinated graphene (M@N4C). By calculating the free energy diagrams of MOR on M@N4C, Co@N4C was screened out to be the most effective MOR catalyst with a low limiting potential of 0.41 V due to the unique charge transfers and electronic structures. Importantly, one- and two-dimensional volcano relationships in MOR on M@N4C catalysts are established based on the d-band center and the Gibbs free energy of ΔG*CH3OH and ΔG*CO, respectively. In one word, this work provides theoretical guides toward the improved activity of MOR on M@N4C and hints for the design of active and efficient MOR electrocatalysts.
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Affiliation(s)
- Jing Zhang
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Luo Yan
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Kui Xue
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Jie Wu
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Ruiqi Ku
- School of Physics, Harbin Institute of Technology, Harbin 150001, China
| | - Yi-Min Ding
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Huilong Dong
- School of Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu 215500, China
| | - Liujiang Zhou
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
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7
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Tomassetti M, Pezzilli R, Leonardi C, Prestopino G, Di Natale C, Campanella L, Medaglia PG. A Direct Catalytic Ethanol Fuel Cell (DCEFC) Modified by LDHs, or by Catalase-LDHs, and Improvement in Its Kinetic Performance: Applications for Human Saliva and Disinfectant Products for COVID-19. BIOSENSORS 2023; 13:bios13040441. [PMID: 37185517 PMCID: PMC10136279 DOI: 10.3390/bios13040441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/23/2023] [Accepted: 03/29/2023] [Indexed: 05/17/2023]
Abstract
In this work, it has been experimentally proven that the kinetic performance of a common Direct Catalytic Ethanol Fuel Cell (DCEFC) can be increased by introducing nanostructured (ZnII,AlIII(OH)2)+NO3-·H2O Layered Double Hydroxides (LDHs) into the anode compartment. Carrying out the measurements with the open-circuit voltage method and using a kinetic format, it has been shown that the introduction of LDHs in the anodic compartment implies a 1.3-fold increase in the calibration sensitivity of the method. This improvement becomes even greater in the presence of hydrogen peroxide in a solution. Furthermore, we show that the calibration sensitivity increased by 8-times, when the fuel cell is modified by the enzyme catalase, crosslinked on LDHs and in the presence of hydrogen peroxide. The fuel cell, thus modified (with or without enzyme), has been used for analytical applications on real samples, such as biological (human saliva) and hand disinfectant samples, commonly used for the prevention of COVID-19, obtaining very positive results from both analytical and kinetic points of view on ethanol detection. Moreover, if the increase in the calibration sensitivity is of great importance from the point of view of analytical applications, it must be remarked that the increase in the speed of the ethanol oxidation process in the fuel cell can also be extremely useful for the purposes of improving the energy performance of a DCEFC.
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Affiliation(s)
- Mauro Tomassetti
- Department of Electronic Engineering, University of Rome "Tor Vergata", Viale del Politecnico 1, 00133 Rome, Italy
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, 00185 Rome, Italy
| | - Riccardo Pezzilli
- Department of Industrial Engineering, University of Rome "Tor Vergata", Viale del Politecnico 1, 00133 Rome, Italy
| | - Claudio Leonardi
- Department of Industrial Engineering, University of Rome "Tor Vergata", Viale del Politecnico 1, 00133 Rome, Italy
| | - Giuseppe Prestopino
- Department of Industrial Engineering, University of Rome "Tor Vergata", Viale del Politecnico 1, 00133 Rome, Italy
| | - Corrado Di Natale
- Department of Electronic Engineering, University of Rome "Tor Vergata", Viale del Politecnico 1, 00133 Rome, Italy
| | - Luigi Campanella
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, 00185 Rome, Italy
| | - Pier Gianni Medaglia
- Department of Industrial Engineering, University of Rome "Tor Vergata", Viale del Politecnico 1, 00133 Rome, Italy
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8
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High-performance IN738 superalloy derived from turbine blade waste for efficient ethanol, ethylene glycol, and urea electrooxidation. J APPL ELECTROCHEM 2023. [DOI: 10.1007/s10800-023-01862-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
AbstractIn this work, IN738 superalloy used previously in gas turbines was recycled and used as a working electrode for the electrooxidation of different fuels, namely ethylene glycol, ethanol, and urea. The electrocatalytic efficiency of the electrode was studied by cyclic voltammetry, chronoamperometry, and electrochemical impedance. Several kinetics parameters like diffusion coefficient, Tafel slope, rate constant, and activation energy were calculated. The modified electrode was characterized as received using XRD, SEM, and EDAX to elucidate the crystal structure and surface morphology before and after electrochemical oxidation. The anodic current densities of electrochemical oxidation of ethanol, ethylene glycol, and urea were 29, 17, and 12 mA.cm−2, respectively, in an alkaline solution at a potential of 0.6 V (vs. Ag/AgCl). The kinetic parameters like diffusion coefficients for ethanol, ethylene glycol, and urea were found to be 1.5 $$\times$$
×
10–6, 1.038 $$\times$$
×
10–6, and 0.64 $$\times$$
×
10–6 cm2 s−1, respectively. The charge transfer resistances were estimated for electrooxidation of different fuels by electrochemical impedance spectroscopy (EIS).
Graphical Abstract
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9
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Xiang Q, Yan R, Gao G, Wang S. Electrooxidation of Methanol on PANI‐CeO
2
@Pt Catalysts. ChemistrySelect 2022. [DOI: 10.1002/slct.202203391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qun Xiang
- Institute of Physical Science and Information Technology Anhui University Hefei Anhui, 230601 China
| | - Ruiwen Yan
- Institute of Physical Science and Information Technology Anhui University Hefei Anhui, 230601 China
| | - Guiqi Gao
- Institute of Physical Science and Information Technology Anhui University Hefei Anhui, 230601 China
| | - Shuang Wang
- Institute of Physical Science and Information Technology Anhui University Hefei Anhui, 230601 China
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10
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Abstract
In recent years, fuel cell (FC) technology has seen a promising increase in its proportion in stationary power production. Several pilot projects are in operation across the world, with the number of running hours steadily rising, either as stand-alone units or as part of integrated gas turbine–electric energy plants. FCs are a potential energy source with great efficiency and zero emissions. To ensure the best performance, they normally function within a confined temperature and humidity range; nevertheless, this makes the system difficult to regulate, resulting in defects and hastened deterioration. For diagnosis, there are two primary approaches: restricted input information, which gives an unobtrusive, rapid yet restricted examination, and advanced characterization, which provides a more accurate diagnosis but frequently necessitates invasive or delayed tests. Artificial Intelligence (AI) algorithms have shown considerable promise in providing accurate diagnoses with quick data collecting. This work focuses on software models that allow the user to evaluate many different possibilities in the shortest amount of time and is a vital method for proper and dynamic analysis of such entities. The artificial neural network, genetic algorithm, particle swarm optimization, random forest, support vector machine, and extreme learning machine are common AI approaches discussed in this review. This article examines the modern practice and provides recommendations for future machine learning methodologies in fuel cell diagnostic applications. In this study, these six AI tools are specifically explained with results for a better understanding of the fuel cell diagnosis. The conclusion suggests that these approaches are not only a popular and beneficial tool for simulating the nature of an FC system, but they are also appropriate for optimizing the operational parameters necessary for an ideal FC device. Finally, observations and ideas for future research, enhancements, and investigations are offered.
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11
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Ou L. Theoretical insights into effect of surface composition of Pt-Ru bimetallic catalysts on CH 3OH oxidation: mechanistic considerations. J Mol Model 2022; 28:149. [PMID: 35552840 DOI: 10.1007/s00894-022-05150-7] [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: 12/03/2021] [Accepted: 05/06/2022] [Indexed: 10/18/2022]
Abstract
A deeper mechanistic understanding on CH3OH oxidation on Pt-Ru alloys with different Ru surface compositions is provided by DFT-based theoretical studies in this paper. The present results show that alloying and surface compositions of Ru can change CH3OH oxidation pathway and activity. The optimal surface composition of Ru is speculated to be ca. 50% since the higher Ru surface composition can lead to formation of carbonaceous species that can poison surface. Our present calculated Ru surface composition of ca. 50% exhibits excellent consistency with experimental studies. The origin of enhanced catalytic activity of Pt-Ru alloys is determined. The significantly decreased surface work functions after alloying suggest more electrons are transferred into adsorbates. The calculated lower electrode potentials after alloying imply that lower overpotentials are required for CH3OH oxidation. The excellent consistency with experimental study on decreased onset potentials after alloying further confirms accuracy of our present calculated results. It is hoped that a systematic understanding of the atomic- and molecular-level processes on CH3OH oxidation mechanisms on Pt-Ru alloys will result in the ultimate goal of the explanation of origin of enhanced electrocatalytic activity and design of improved Pt-based alloy electrocatalysts for DMFCs.
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Affiliation(s)
- Lihui Ou
- Hunan Province Cooperative Innovation Center for the Construction & Development of Dongting Lake Ecologic Economic Zone, Hunan Provincial Key Laboratory of Water Treatment Functional Materials, Hunan Province Engineering Research Center of Electroplating Wastewater Reuse Technology, College of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde, 415000, China.
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12
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Kodera F, Sato S, Saito F, Yasukawa T, Umeda M. Influence of Chlorine Oxyacid on the Electrooxidation of Methanol in Strong Acid. CHEM LETT 2022. [DOI: 10.1246/cl.220098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Fumihiro Kodera
- National Institute of Technology, Asahikawa College, 2-2-1-6, Shunkodai, Asahikawa, Hokkaido 071-8142
| | - Shun Sato
- National Institute of Technology, Asahikawa College, 2-2-1-6, Shunkodai, Asahikawa, Hokkaido 071-8142
- Graduate School of Environmental Science, Hokkaido University, N10W5, Sapporo, Hokkaido 060-0810
| | - Fumie Saito
- National Institute of Technology, Asahikawa College, 2-2-1-6, Shunkodai, Asahikawa, Hokkaido 071-8142
- Graduate School of Environmental Science, Hokkaido University, N10W5, Sapporo, Hokkaido 060-0810
| | | | - Minoru Umeda
- Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka, Niigata 940-2188
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13
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Hoang NT, Thuan Nguyen PT, Chung PD, Thu Ha VT, Hung TQ, Nam PT, Thu VT. Electrochemical preparation of monodisperse Pt nanoparticles on a grafted 4-aminothiophenol supporting layer for improving the MOR reaction. RSC Adv 2022; 12:8137-8144. [PMID: 35424755 PMCID: PMC8982339 DOI: 10.1039/d2ra00040g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 03/08/2022] [Indexed: 02/01/2023] Open
Abstract
The methanol oxidation reaction (MOR) has recently gained a lot of attention due to its application in fuel cells and electrochemical sensors. To enhance the MOR, noble metal nanoparticles should be homogeneously dispersed on the electrode surface with the aid of one suitable support. In this work, 4-aminothiophenol (4-ATP) molecules which contain simultaneously amine and thiol groups were electro-grafted onto the electrode surface to provide anchoring sites, limit aggregation and ensure good dispersion of metal nanoparticles. The results showed a high density of platinum nanoparticles (PtNPs) with an average size of 25 nm on the glassy electrode modified with a 4-ATP supporting layer. Consequently, the MOR was improved by 2.1 times with the aid of the grafted 4-ATP layer. The electrochemical sensor based on PtNPs/4-ATP/GCE is able to detect MeOH in a linear range from 1.26 to 21.42 mM with a detection limit of 1.21 mM.
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Affiliation(s)
- Nguyen Tien Hoang
- University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | | | - Pham Do Chung
- Hanoi National University of Education (HNUE 134 Xuan Thuy, Cau Giay Hanoi Vietnam
| | - Vu Thi Thu Ha
- Institute of Chemistry (IOC), Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Tran Quang Hung
- Institute of Chemistry (IOC), Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Pham Thi Nam
- Institute of Tropical Technology (ITT), Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
| | - Vu Thi Thu
- University of Science and Technology of Hanoi (USTH), Vietnam Academy of Science and Technology (VAST) 18 Hoang Quoc Viet, Cau Giay Hanoi Vietnam
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14
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Mechanistic insight into methanol electro-oxidation catalyzed by PtCu alloy. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63886-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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15
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Hefnawy MA, Fadlallah SA, El-Sherif RM, Medany SS. Nickel-manganese double hydroxide mixed with reduced graphene oxide electrocatalyst for efficient ethylene glycol electrooxidation and hydrogen evolution reaction. SYNTHETIC METALS 2021; 282:116959. [DOI: 10.1016/j.synthmet.2021.116959] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
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16
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Razmgar K, Nasiraee M. Polyvinyl alcohol
‐based membranes for filtration of aqueous solutions: A comprehensive review. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25846] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kourosh Razmgar
- College of Science, Health, Engineering and Education Murdoch University Perth Western Australia Australia
| | - Mohammad Nasiraee
- Chemical Engineering Department, Faculty of Engineering Ferdowsi University of Mashhad Mashhad Iran
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17
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Pérez-Martínez L, Machado de los Toyos LM, Shibuya JJT, Cuesta A. Methanol Dehydrogenation on Pt Electrodes: Active Sites and Role of Adsorbed Spectators Revealed through Time-Resolved ATR-SEIRAS. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Laura Pérez-Martínez
- School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3UE, Scotland, U.K
| | | | - Jani J. T. Shibuya
- School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3UE, Scotland, U.K
| | - Angel Cuesta
- School of Natural and Computing Sciences, University of Aberdeen, Aberdeen AB24 3UE, Scotland, U.K
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18
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Noguchi H, Ishimaru T, Uosaki K. Potential and time dependent broad band sum frequency generation spectroscopic study on electrochemical oxidation of adsorbed CO on Pt(1 1 1) electrode surface in pre-peak region in alkaline solution. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Self-Supported Defect-Rich Au-Based Nanostructures as Robust Bifunctional Catalysts for the Methanol Oxidation Reaction and Oxygen Reduction Reaction in an Alkaline Medium. NANOMATERIALS 2021; 11:nano11092193. [PMID: 34578509 PMCID: PMC8467196 DOI: 10.3390/nano11092193] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/17/2021] [Accepted: 08/23/2021] [Indexed: 11/16/2022]
Abstract
Recently, alkaline direct methanol fuel cells have made great progress with the development of alkaline electrocatalysis, and a wide variety of catalysts have been explored for methanol oxidation reaction (MOR)and oxygen reduction reaction (ORR). However, the slow kinetics of the MOR and ORR remain a great challenge. In this paper, self-supported defect-rich AuCu was obtained by a convenient one-pot strategy. Self-supported AuCu presented a branched, porous nanostructure. The nanobranch consisted of several 13 nm skeletons, which connected in the kink of the structure. Different growth directions co-existed at the kink, and the twin boundaries and dislocations as defects were observed. When the Au-based nanostructure functioned as an electrocatalyst, it showed robust MOR and ORR performance. For the MOR, the forward peak current was 2.68 times greater than that of Au/C; for the ORR, the activity was close to that of Pt/C and significantly better than that of Au/C. In addition, it possessed superior electrochemical stability for MOR and ORR. Finally, an in-depth exploration of the impact of surface defects and electrochemical Cu removal on MOR and ORR activity was carried out to explain the MOR and ORR’s catalytic performance.
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20
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Electro catalytic oxidation reactions for harvesting alternative energy over non noble metal oxides: Are we a step closer to sustainable energy solution? ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.06.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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21
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Hung TC, Liao TW, Liao GJ, Liao ZH, Hsu PW, Lai YL, Hsu YJ, Wang CH, Yang YW, Wang JH, Luo MF. Promoted activity of annealed Rh nanoclusters on thin films of Al 2O 3/NiAl(100) in the dehydrogenation of Methanol-d 4. RSC Adv 2021; 11:24762-24771. [PMID: 35481058 PMCID: PMC9036867 DOI: 10.1039/d1ra04066a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/12/2021] [Indexed: 11/21/2022] Open
Abstract
Annealed Rh nanoclusters on an ordered thin film of Al2O3/NiAl(100) were shown to exhibit a promoted reactivity toward the decomposition of methanol-d4, under both ultrahigh vacuum and near-ambient-pressure conditions. The Rh clusters were grown with vapor deposition onto the Al2O3/NiAl(100) surface at 300 K and annealed to 700 K. The decomposition of methanol-d4 proceeded only through dehydrogenation, with CO and deuterium as products, on Rh clusters both as prepared and annealed. Nevertheless, the catalytic reactivity of the annealed clusters, measured with the production of either CO or deuterium per surface Rh site from the reaction, became at least 2-3 times that of the as-prepared ones. The promoted reactivity results from an altered support effect associated with an annealing-induced mass transport at the surface. Our results demonstrate a possibility to practically prepare reactive Rh clusters, regardless of the cluster size, that can tolerate an elevated reaction temperature, with no decreased reactivity.
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Affiliation(s)
- Ting-Chieh Hung
- Department of Physics, National Central University 300 Jhongda Road, Jhongli District Taoyuan 32001 Taiwan
| | - Ting-Wei Liao
- Department of Physics, National Central University 300 Jhongda Road, Jhongli District Taoyuan 32001 Taiwan
| | - Guan-Jr Liao
- Department of Physics, National Central University 300 Jhongda Road, Jhongli District Taoyuan 32001 Taiwan
| | - Zhen-He Liao
- Department of Physics, National Central University 300 Jhongda Road, Jhongli District Taoyuan 32001 Taiwan
| | - Po-Wei Hsu
- Department of Physics, National Central University 300 Jhongda Road, Jhongli District Taoyuan 32001 Taiwan
| | - Yu-Ling Lai
- National Synchrotron Radiation Research Center 101 Hsin-Ann Road, Hsinchu Science Park Hsinchu 30076 Taiwan
| | - Yao-Jane Hsu
- National Synchrotron Radiation Research Center 101 Hsin-Ann Road, Hsinchu Science Park Hsinchu 30076 Taiwan
| | - Chia-Hsin Wang
- National Synchrotron Radiation Research Center 101 Hsin-Ann Road, Hsinchu Science Park Hsinchu 30076 Taiwan
| | - Yaw-Wen Yang
- National Synchrotron Radiation Research Center 101 Hsin-Ann Road, Hsinchu Science Park Hsinchu 30076 Taiwan
| | - Jeng-Han Wang
- Department of Chemistry, National Taiwan Normal University No. 88, Sec. 4, Ting-Zhou Road Taipei 11677 Taiwan
| | - Meng-Fan Luo
- Department of Physics, National Central University 300 Jhongda Road, Jhongli District Taoyuan 32001 Taiwan
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22
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Recent Advances in Carbon Dioxide Conversion: A Circular Bioeconomy Perspective. SUSTAINABILITY 2021. [DOI: 10.3390/su13126962] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Managing the concentration of atmospheric CO2 requires a multifaceted engineering strategy, which remains a highly challenging task. Reducing atmospheric CO2 (CO2R) by converting it to value-added chemicals in a carbon neutral footprint manner must be the ultimate goal. The latest progress in CO2R through either abiotic (artificial catalysts) or biotic (natural enzymes) processes is reviewed herein. Abiotic CO2R can be conducted in the aqueous phase that usually leads to the formation of a mixture of CO, formic acid, and hydrogen. By contrast, a wide spectrum of hydrocarbon species is often observed by abiotic CO2R in the gaseous phase. On the other hand, biotic CO2R is often conducted in the aqueous phase and a wide spectrum of value-added chemicals are obtained. Key to the success of the abiotic process is understanding the surface chemistry of catalysts, which significantly governs the reactivity and selectivity of CO2R. However, in biotic CO2R, operation conditions and reactor design are crucial to reaching a neutral carbon footprint. Future research needs to look toward neutral or even negative carbon footprint CO2R processes. Having a deep insight into the scientific and technological aspect of both abiotic and biotic CO2R would advance in designing efficient catalysts and microalgae farming systems. Integrating the abiotic and biotic CO2R such as microbial fuel cells further diversifies the spectrum of CO2R.
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23
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Menshchikov VS, Belenov SV, Novomlinsky IN, Nikulin AY, Guterman VE. Multi-Component Platinum-Containing Electrocatalysts in the Reactions of Oxygen Reduction and Methanol Oxidation. RUSS J ELECTROCHEM+ 2021. [DOI: 10.1134/s1023193521060070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Meenu PC, Datta SP, Singh SA, Dinda S, Chakraborty C, Roy S. A compendium on metal organic framework materials and their derivatives as electrocatalyst for methanol oxidation reaction. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111710] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Liao GJ, Liu KT, Liao ZH, Hsu PW, Wang JH, Luo MF. Dependence on Size of Supported Rh Nanoclusters in the Dehydrogenation of Methanol- d4 Obstructed by CO. J Phys Chem Lett 2021; 12:2622-2629. [PMID: 33719453 DOI: 10.1021/acs.jpclett.1c00634] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The size effect on the activity of a catalyst has been a focal issue since ideal catalysts were pursued, whereas that on the degradation of a catalyst, by reaction intermediates such as CO, is little discussed. We demonstrate that the dehydrogenation of methanol-d4 on supported Rh nanoclusters precovered with CO (Rh-CO clusters) was obstructed, indicated by a decreased production of CO and D2; the obstructive effect exhibits a remarkable dependence on the cluster size, with a minimum at a cluster diameter near 1.4 nm. The decreased production arose from a decreased reaction probability controlled by the increased activation energy for each dehydrogenation step (including formation of methoxy-d3), adsorption energies of CO, and repulsion from the CO array on the Rh-CO surface. The effects of these factors in deactivating the clusters varied separately with the cluster size. Consequently, the size effect on the CO poisoning should be taken into account in engineering the cluster size to optimize the catalytic performance.
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Affiliation(s)
- Guan-Jr Liao
- Department of Physics, National Central University, 300 Jhongda Road, Jhongli District, Taoyuan 32001, Taiwan
| | - Kuan-Ting Liu
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Road, Taipei 11677, Taiwan
| | - Zhen-He Liao
- Department of Physics, National Central University, 300 Jhongda Road, Jhongli District, Taoyuan 32001, Taiwan
| | - Po-Wei Hsu
- Department of Physics, National Central University, 300 Jhongda Road, Jhongli District, Taoyuan 32001, Taiwan
| | - Jeng-Han Wang
- Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4, Ting-Zhou Road, Taipei 11677, Taiwan
| | - Meng-Fan Luo
- Department of Physics, National Central University, 300 Jhongda Road, Jhongli District, Taoyuan 32001, Taiwan
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26
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Tong Y, Yan X, Liang J, Dou SX. Metal-Based Electrocatalysts for Methanol Electro-Oxidation: Progress, Opportunities, and Challenges. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e1904126. [PMID: 31608601 DOI: 10.1002/smll.201904126] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 08/23/2019] [Indexed: 06/10/2023]
Abstract
Direct methanol fuel cells (DMFCs) are among the most promising portable power supplies because of their unique advantages, including high energy density/mobility of liquid fuels, low working temperature, and low emission of pollutants. Various metal-based anode catalysts have been extensively studied and utilized for the essential methanol oxidation reaction (MOR) due to their superior electrocatalytic performance. At present, especially with the rapid advance of nanotechnology, enormous efforts have been exerted to further enhance the catalytic performance and minimize the use of precious metals. Constructing multicomponent metal-based nanocatalysts with precisely designed structures can achieve this goal by providing highly tunable compositional and structural characteristics, which is promising for the modification and optimization of their related electrochemical properties. The recent advances of metal-based electrocatalytic materials with rationally designed nanostructures and chemistries for MOR in DMFCs are highlighted and summarized herein. The effects of the well-defined nanoarchitectures on the improved electrochemical properties of the catalysts are illustrated. Finally, conclusive perspectives are provided on the opportunities and challenges for further refining the nanostructure of metal-based catalysts and improving electrocatalytic performance, as well as the commercial viability.
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Affiliation(s)
- Yueyu Tong
- Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, North Wollongong, NSW, 2500, Australia
| | - Xiao Yan
- Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, North Wollongong, NSW, 2500, Australia
- Guangdong Key Laboratory of Membrane Materials and Membrane Separation, Guangzhou Institute of Advanced Technology, Chinese Academy of Sciences, Guangzhou, 511458, China
| | - Ji Liang
- Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, North Wollongong, NSW, 2500, Australia
- Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Shi Xue Dou
- Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, North Wollongong, NSW, 2500, Australia
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27
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Peng G, Xu L, Glezakou VA, Mavrikakis M. Mechanism of methanol synthesis on Ni(110). Catal Sci Technol 2021. [DOI: 10.1039/d1cy00107h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Planewave density functional theory (DFT-PW91) calculations are employed to study the methanol synthesis through CO2 and CO hydrogenation, as well as the two side reactions: the water gas shift (WGS) reaction and the formic acid formation, on Ni(110).
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Affiliation(s)
- Guowen Peng
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
| | - Lang Xu
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
| | - Vassiliki-Alexandra Glezakou
- Basic and Applied Molecular Foundations Group
- Physical and Computational Sciences Directorate
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Manos Mavrikakis
- Department of Chemical and Biological Engineering
- University of Wisconsin-Madison
- Madison
- USA
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28
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Zimmermann TP, Orth N, Finke S, Limpke T, Stammler A, Bögge H, Walleck S, Ivanović-Burmazović I, Glaser T. Catalytic H 2O 2 Activation by a Diiron Complex for Methanol Oxidation. Inorg Chem 2020; 59:15563-15569. [PMID: 33081463 DOI: 10.1021/acs.inorgchem.0c02698] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In nature, C-H bond oxidation of CH4 involves a peroxo intermediate that decays to the high-valent active species of either a "closed" {FeIV(μ-O)2FeIV} core or an "open" {FeIV(O)(μ-O)FeIV(O)} core. To mimic and to obtain more mechanistic insight in this reaction mode, we have investigated the reactivity of the bioinspired diiron complex [(susan){Fe(OH)(μ-O)Fe(OH)}]2+ [susan = 4,7-dimethyl-1,1,10,10-tetrakis(2-pyridylmethyl)-1,4,7,10-tetraazadecane], which catalyzes CH3OH oxidation with H2O2 to HCHO and HCO2H. The kinetics is faster in the presence of a proton. 18O-labeling experiments show that the active species, generated by a decay of the initially formed peroxo intermediate [(susan){FeIII(μ-O)(μ-O2)FeIII}]2+, contains one reactive oxygen atom from the μ-oxo and another from the μ-peroxo bridge of its peroxo precursor. Considering an FeIVFeIV active species, a "closed" {FeIV(μ-O)2FeIV} core explains the observed labeling results, while a scrambling of the terminal and bridging oxo ligands is required to account for an "open" {FeIV(O)(μ-O)FeIV(O)} core.
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Affiliation(s)
| | - Nicole Orth
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, D-91058 Erlangen, Germany
| | - Sebastian Finke
- Fakultät für Chemie, Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Thomas Limpke
- Fakultät für Chemie, Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Anja Stammler
- Fakultät für Chemie, Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Hartmut Bögge
- Fakultät für Chemie, Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Stephan Walleck
- Fakultät für Chemie, Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany
| | - Ivana Ivanović-Burmazović
- Department Chemie und Pharmazie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, D-91058 Erlangen, Germany.,Department Chemie, Ludwigs-Maximilians-Universität, Butenandtstraße 5-13, 81377 München, Germany
| | - Thorsten Glaser
- Fakultät für Chemie, Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany
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30
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Direct Catalytic Fuel Cell Device Coupled to Chemometric Methods to Detect Organic Compounds of Pharmaceutical and Biomedical Interest. SENSORS 2020; 20:s20133615. [PMID: 32605007 PMCID: PMC7374455 DOI: 10.3390/s20133615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 06/17/2020] [Accepted: 06/23/2020] [Indexed: 12/05/2022]
Abstract
Making use of a small direct methanol fuel cell device (DMFC), used as an analytical sensor, chemometric methods, organic compounds very different from one another, can be determined qualitatively and quantitatively. In this research, the following seven different organic compounds of pharmaceutical and biomedical interest, having in common only one –OH group, were considered: chloramphenicol, imipenem, methanol, ethanol, propanol, atropine and cortisone. From a quantitative point of view, the traditional approach, involving the building of individual calibration curves, which allow the quantitative determination of the corresponding organic compounds, even if with different sensitivities, was followed. For the qualitative analysis of each compound, this approach has been much more innovative. In fact, by processing the data from each of the individual response curves, obtained through the fuel cell, using chemometric methods, it is possible to directly identify and recognize each of the seven organic compounds. Since the study is a proof of concept to show the potential of this innovative methodological approach, based on the combination of direct methanol fuel cell with advanced chemometric tools, at this stage, concentration ranges that may not be the ones found in some real situations were investigated. The three methods adopted are all explorative methods with very limited computation costs, which have different characteristics and, therefore, may provide complementary information on the analyzed data. Indeed, while PCA (principal components analysis) provides the most parsimonious summary of the variability observed in the current response matrix, the analysis of the current response behavior was performed by the “slicing” method, in order to transform the current response profiles into numerical matrices, while PARAFAC (Parallel Factor Analysis) allows to obtain a finer deconvolution of the exponential curves. On the other hand, the multiblock nature of “ComDim” (Common Components and Specific Weight Analysis) has been the basis to relate the variability observed in the current response behavior with the parameters of the linear calibrations.
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Macias-Ferrer D, Melo-Banda JA, Silva-Rodrigo R, Lam-Maldonado M, Páramo-García U, Verde-Gómez JY, Del-Ángel-Vicente P. Highly dispersed PtCo nanoparticles on micro/nano-structured pyrolytic carbon from refined sugar for methanol electro-oxidation in acid media. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.04.064] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Wang H, Zhang K, Qiu J, Wu J, Shao J, Wang H, Zhang Y, Han J, Zhang Y, Yan L. Ternary PtFeCo alloys on graphene with high electrocatalytic activities for methanol oxidation. NANOSCALE 2020; 12:9824-9832. [PMID: 32338669 DOI: 10.1039/d0nr00757a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ternary PtFeCo alloys as alternatives to conventional Pt electrocatalysts are highly important in the field of the methanol oxidation reaction. In this study, we demonstrate a one-pot two-step reduction method for the synthesis of graphene supported PtFeCo alloy nanocomposites as an integrated binder-free catalyst. The synergistic effect of alloying with Fe and Co as well as graphene decorating contributes to an increase in the utilization of the noble metal, namely, reducing the amount of Pt in the nanocomposites to 7%. After tailoring the elemental composition of the alloys, Pt52Fe29Co19@G-7% exhibits a mass activity/specific activity of 1758.2 mA mg-1Pt/3.42 mA cm-2 that is 3.13/3.45 times that of commercial Pt/C in an acidic medium. Impressively, it showed a superior mass current density of 9356.1 mA mg-1Pt at 60 °C which is close to the operating temperature of direct methanol fuel cells. Moreover, the as-obtained Pt52Fe29Co19@G-7% also exhibited excellent CO tolerance and reliable stability compared to commercial Pt/C. The structural characterization further verifies that the surface strain and electronic effect play a critical role in determining the electrocatalytic properties of PtFeCo@G nanocomposites for the methanol oxidation reaction.
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Affiliation(s)
- Hongfei Wang
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, iCHEM, University of Science and Technology of China, China.
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Martini E, Tomassetti M, Angeloni R, Castrucci M, Campanella L. A Suitable Immunosensor for Chloramphenicol Determination: Study of Two Different Competitive Formats. CURR PHARM ANAL 2020. [DOI: 10.2174/1573412915666190225163036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
deep analytical study was performed on two different formats based on a
“competitive” ELISA-type assay to develop a suitable, sensitive and cheap immune device for
chloramphenicol determination that could be advantageously applied to the analysis of real matrices
(pharmaceutical, food and environmental).
Methods:
To this purpose peroxidase enzyme as a marker and an amperometric electrode for hydrogen
peroxide, as a transducer, were used. Through the first competitive format, chloramphenicol determination
was based on the competition between chloramphenicol and conjugated with biotin-avidinperoxidase
chloramphenicol, both free in solution, for anti-chloramphenicol immobilized in the membrane,
while the second competitive format was based on the competition between free in solution chloramphenicol
and immobilized in membrane one, for anti-chloramphenicol biotin-avidin-peroxidase
conjugated free in solution.
Results:
The immunosensor was optimized by comparing the two used different “competitive” working
formats on the basis of respective Kaff values, that were found to be about 105 and 104 (mol L-1)-1. The
developed immune device displayed good selectivity for Chloramphenicol and LOD (limit of detection)
was of the order of 10-9 mol L-1. The immunosensor was also used to test the presence of Chloramphenicol
in real matrices such as cow milk, river wastewater and pharmaceutical formulations; recovery
tests, using the standard addition method, gave satisfactory results.
Conclusion:
The results proved the validity of this immune device based on the competition between
chloramphenicol and conjugated chloramphenicol obtained using biotin-avidin-peroxidase format, by
which it is possible to carry out the analysis of chloramphenicol in milk and in river waste-waters with a
% RSD ≤ 5 and with recovery values between 96% and 103%.
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Affiliation(s)
- Elisabetta Martini
- Department of Chemistry, University of Rome “Sapienza”, P.le A. Moro 5, Rome 00185, Italy
| | - Mauro Tomassetti
- Department of Chemistry, University of Rome “Sapienza”, P.le A. Moro 5, Rome 00185, Italy
| | - Riccardo Angeloni
- Department of Chemistry, University of Rome “Sapienza”, P.le A. Moro 5, Rome 00185, Italy
| | - Mauro Castrucci
- Department of Chemistry, University of Rome “Sapienza”, P.le A. Moro 5, Rome 00185, Italy
| | - Luigi Campanella
- Department of Chemistry, University of Rome “Sapienza”, P.le A. Moro 5, Rome 00185, Italy
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Renewable Energy and EU 2020 Target for Energy Efficiency in the Czech Republic and Slovakia. ENERGIES 2020. [DOI: 10.3390/en13040965] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Our paper focuses on the renewable energy and EU 2020 target for energy efficiency in the Czech Republic and Slovakia. We study the reduction of greenhouse gas (GHG) emissions in these two EU Member States through the prism of the Europe 2020 strategy and the 3 × 20 climate and energy package and economic growth (represented by the Gross Domestic Product (GDP) that allows to measure the national dynamics and provide cross-country comparisons) without attributing specific attention to issues such as the electrification of transport or heating, and thence leaving them outside the scope of this paper. Both Czech Republic and Slovakia are two post-Communist countries that still face the consequences of economic transformation and struggle with the optimal management of natural resources. Both countries encountered profound system transformation after 1989 that are apparent in all three measures of sustainable development used in our study. We show that it is unlikely that the planned increase in renewable energy in the Czech Republic and Slovakia will reach its targets, but they might succeed in reducing their energy consumption and greenhouse gas emissions. Our findings show that the energy intensity of Czech and Slovak economies increased in the early 2000s and then stabilized at a level about twice of the EU average. It appears that this value is likely to remain the same in the forthcoming years. However, implementation of GHG emissions in the Czech Republic and Slovakia may be at risk in case the proper energy policy is not maintained. Moreover, our results show how the increase in the share of renewable energy and improvement in energy efficiency go hand-in-hand with mining and exploiting the energy sources that is notorious for the transition economies. We also demonstrate that a proper energy policy is required for effectively reducing energy consumption and greenhouse gas emissions. There is a need for commitments made by relevant stakeholders and policymakers targeted at achieving sustainable economic growth and energy efficiency. In addition, we demonstrate that there is a need for maintaining a proper balance between economic development and environmental protection, which is a must for the EU sustainable energy development agenda and all its accompanying targets for all its Member States.
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Marcinkowski MD, Adamsen KC, Doudin N, Sharp MA, Smith RS, Wang Y, Wendt S, Lauritsen JV, Parkinson GS, Kay BD, Dohnálek Z. Adsorption and reaction of methanol on Fe 3O 4(001). J Chem Phys 2020; 152:064703. [PMID: 32061207 DOI: 10.1063/1.5139418] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The interaction of methanol with iron oxide surfaces is of interest due to its potential in hydrogen storage and from a fundamental perspective as a chemical probe of reactivity. We present here a study examining the adsorption and reaction of methanol on magnetite Fe3O4(001) at cryogenic temperatures using a combination of temperature programmed desorption, x-ray photoelectron spectroscopy, and scanning tunneling microscopy. The methanol desorption profile from Fe3O4(001) is complex, exhibiting peaks at 140 K, 173 K, 230 K, and 268 K, corresponding to the desorption of intact methanol, as well as peaks at 341 K and 495 K due to the reaction of methoxy intermediates. The saturation of a monolayer of methanol corresponds to ∼5 molecules/unit cell (u.c.), which is slightly higher than the number of surface octahedral iron atoms of 4/u.c. We probe the kinetics and thermodynamics of the desorption of molecular methanol using inversion analysis. The deconvolution of the complex desorption profile into individual peaks allows for calculations of both the desorption energy and the prefactor of each feature. The initial 0.7 methanol/u.c. reacts to form methoxy and hydroxy intermediates at 180 K, which remain on the surface above room temperature after intact methanol has desorbed. The methoxy species react via one of two channels, a recombination reaction with surface hydroxyls to form additional methanol at ∼350 K and a disproportionation reaction to form methanol and formaldehyde at ∼500 K. Only 20% of the methoxy species undergo the disproportionation reaction, with most of them reacting via the 350 K pathway.
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Affiliation(s)
- Matthew D Marcinkowski
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - Kræn C Adamsen
- Interdisciplinary Nanoscience Center (iNano) and Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Nassar Doudin
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - Marcus A Sharp
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - R Scott Smith
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - Yang Wang
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - Stefan Wendt
- Interdisciplinary Nanoscience Center (iNano) and Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Jeppe V Lauritsen
- Interdisciplinary Nanoscience Center (iNano) and Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Gareth S Parkinson
- Institute of Applied Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10/134, 1040 Vienna, Austria
| | - Bruce D Kay
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
| | - Zdenek Dohnálek
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, USA
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36
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Tomassetti M, Angeloni R, Marchiandi S, Castrucci M, Martini E, Campanella L. Direct Methanol Catalytic Fuel Cell, for Measuring Ethanol Contents in Pharmaceutical Tinctures. CURR ANAL CHEM 2020. [DOI: 10.2174/1573411014666180418160300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
In order to test real direct applicability for analytical purposes, a small and simple
direct methanol (or ethanol) catalytic, enzymatic or non-enzymatic fuel cell (DMFC) was used for
the analysis of ethanol-based pharmaceutical tinctures; a detailed experimental study was conducted
on five different pharmaceutical tinctures available at drugstores.
Results:
The results obtained using both enzymatic and non-enzymatic devices were compared with
those obtained by analyzing the same pharmaceutical samples with a conventional catalase biosensor.
Finally, the results were compared with the nominal values provided by manufacturing firms.
Conclusion:
The correlations between the different experimental and nominal values considered were
good in general or satisfactory and the applied statistical tests (f-test and t-test) were also very comforting.
At the end of the study, the use of enzymatic DMFC proved to be better than non- enzymatic
DMFC devices, because it requires shorter analysis times.
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Affiliation(s)
- Mauro Tomassetti
- Department of Chemistry, "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Riccardo Angeloni
- Department of Chemistry, "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Sergio Marchiandi
- Department of Chemistry, "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Mauro Castrucci
- Department of Chemistry, "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Elisabetta Martini
- Department of Chemistry, "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
| | - Luigi Campanella
- Department of Chemistry, "Sapienza" University of Rome, P.le Aldo Moro 5, 00185, Rome, Italy
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Chen L, Zhou L, Lu H, Zhou Y, Huang J, Wang J, Wang Y, Yuan X, Yao Y. Shape-controlled synthesis of planar PtPb nanoplates for highly efficient methanol electro-oxidation reaction. Chem Commun (Camb) 2020; 56:9138-9141. [PMID: 32644079 DOI: 10.1039/d0cc03704d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In this work, novel insights into the influence of different nanocrystal structures on the electrocatalytic oxidation of methanol are reported. Herein, we have successfully prepared high-yield PtPb nanoplates in the diethylene glycol (DEG) solvent. The as-obtained PtPb nanoplates with a large surface area of the (102) facet show higher MOR activity and superior durability in alkaline electrolyte compared with both zero-dimensional PtPb nanoparticles and commercial Pt/C. Further chronoamperometric (CA) measurements and discrete Fourier transform (DFT) calculations indicate that the PtPb nanoplates possess much better operation durability and CO tolerance due to the negative adsorption energy of the (102) facet.
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Affiliation(s)
- Lei Chen
- School of Chemistry and Chemical Engineering, Nantong University, 9 Seyuan Road, Nantong, 226019, Jiangsu, P. R. China. and SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, P. R. China
| | - Luozeng Zhou
- State Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, 2965 Dongchuan Road, Shanghai, 200245, P. R. China
| | - Hongbin Lu
- School of Chemistry and Chemical Engineering, Nantong University, 9 Seyuan Road, Nantong, 226019, Jiangsu, P. R. China.
| | - Yaqin Zhou
- State Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, 2965 Dongchuan Road, Shanghai, 200245, P. R. China
| | - Jialu Huang
- School of Chemistry and Chemical Engineering, Nantong University, 9 Seyuan Road, Nantong, 226019, Jiangsu, P. R. China.
| | - Jin Wang
- School of Chemistry and Chemical Engineering, Nantong University, 9 Seyuan Road, Nantong, 226019, Jiangsu, P. R. China.
| | - Yang Wang
- School of Chemistry and Chemical Engineering, Nantong University, 9 Seyuan Road, Nantong, 226019, Jiangsu, P. R. China.
| | - Xiaolei Yuan
- School of Chemistry and Chemical Engineering, Nantong University, 9 Seyuan Road, Nantong, 226019, Jiangsu, P. R. China.
| | - Yong Yao
- School of Chemistry and Chemical Engineering, Nantong University, 9 Seyuan Road, Nantong, 226019, Jiangsu, P. R. China.
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38
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Investigation of Thermal Stability and Reactivity of Rh Nanoclusters on an Ultrathin Alumina Film. Catalysts 2019. [DOI: 10.3390/catal9110971] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
We studied the structural and morphological evolution of Rh clusters on an ordered ultrathin alumina film grown on NiAl(100) in annealing processes, under ultrahigh vacuum conditions and with various surface probe techniques. The Rh clusters, prepared on vapor deposition of Rh onto the alumina film at 300 K, had an fcc phase and grew in the (100) orientation; the annealing altered the cluster structure little—the lattice parameter decreased by a factor <2%—but the cluster morphology significantly. With elevated temperature, small clusters (diameter ≤1.5 nm) decreased little in size; in contrast, large clusters (diameter ≥2.0 nm) varied in a complex manner—their mean diameter decreased to about 1.5 nm on annealing to 450 K, despite their similar height, while it increased to above 2.0 nm at temperature ≥570 K. This atypical decrease in size was governed predominantly by energetics. Such a reduced size enhanced the total surface area as well as the reactivity of the clusters toward methanol decomposition, so increased the production of D2 (H2) and CO from decomposed methanol-d4 (or methanol). The result implies a higher temperature tolerance for Rh clusters on the alumina film and a practical approach to prepare small Rh clusters with high reactivity.
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Bera KK, Chakraborty M, Chowdhury SR, Ray A, Das S, Bhattacharya SK. Significantly improved and synergistic effect of Pt–ZnO–Bi2O3 ternary hetero-junctions toward anode-catalytic oxidation of methanol in alkali. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134775] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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40
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Hu L, Ma L, Gan M, Fu S, He H, Jiang M, Xie F, Zhang H. CoMoO4 decorated on the surface of Co,N-doped carbon polyhedrons as the support of platinum with excellent electrocatalytic activity and durability. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.07.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bodenschatz CJ, Xie T, Zhang X, Getman RB. Insights into how the aqueous environment influences the kinetics and mechanisms of heterogeneously-catalyzed COH* and CH 3OH* dehydrogenation reactions on Pt(111). Phys Chem Chem Phys 2019; 21:9895-9904. [PMID: 31038522 DOI: 10.1039/c9cp00824a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Water influences catalytic reactions in multiple ways, including energetic and mechanistic effects. While simulations have provided significant insight into the roles that H2O molecules play in aqueous-phase heterogeneous catalysis, questions still remain as to the extent to which H2O structures influence catalytic mechanisms. Specifically, influences of the configurational variability in the water structures at the catalyst interface are yet to be understood. Configurational variability is challenging to capture, as it requires multiscale approaches. Herein, we apply a multiscale sampling approach to calculate reaction thermodynamics and kinetics for COH* dehydrogenation to CO* and CH3OH* dehydrogenation to CH2OH* on Pt(111) catalysts under liquid H2O. We explore various pathways for these dehydrogenation reactions that could influence the overall mechanism of methanol decomposition by including participation of H2O structures both energetically and mechanistically. We find that the liquid H2O environment significantly influences the mechanism of COH* dehydrogenation to CO* but leaves the mechanism of CH3OH* dehydrogenation to CH2OH* largely unaltered.
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Affiliation(s)
- Cameron J Bodenschatz
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, USA.
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43
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Petrii OA. The Progress in Understanding the Mechanisms of Methanol and Formic Acid Electrooxidation on Platinum Group Metals (a Review). RUSS J ELECTROCHEM+ 2019. [DOI: 10.1134/s1023193519010129] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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44
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Glüsen A, Dionigi F, Paciok P, Heggen M, Müller M, Gan L, Strasser P, Dunin-Borkowski RE, Stolten D. Dealloyed PtNi-Core–Shell Nanocatalysts Enable Significant Lowering of Pt Electrode Content in Direct Methanol Fuel Cells. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04883] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas Glüsen
- Institute of Energy and Climate Research IEK-3: Electrochemical Process Engineering, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Fabio Dionigi
- The Electrochemical Energy, Catalysis and Materials Group, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Paul Paciok
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Marc Heggen
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Martin Müller
- Institute of Energy and Climate Research IEK-3: Electrochemical Process Engineering, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Lin Gan
- Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
| | - Peter Strasser
- The Electrochemical Energy, Catalysis and Materials Group, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany
| | - Rafal E. Dunin-Borkowski
- Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Detlef Stolten
- Institute of Energy and Climate Research IEK-3: Electrochemical Process Engineering, Forschungszentrum Jülich, 52425 Jülich, Germany
- Chair for Fuel Cells, RWTH Aachen University, 52072 Aachen, Germany
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45
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Ou TH, Wang Y, Fang D, Narayanan SR, Wu W. Detection of Fake Alcoholic Beverages Using Electrolyte-Free Nanogap Electrochemical Cells. ACS APPLIED MATERIALS & INTERFACES 2019; 11:6217-6223. [PMID: 30663304 DOI: 10.1021/acsami.8b18729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Because of the similarity of odor, appearance, and chemical structure of methanol and ethanol, measuring the low concentration of methanol in an alcoholic beverage is difficult to perform in a quick, quantitative, and repeatable fashion. However, it is important for people to monitor the content of methanol in a liquor because a high amount of methanol absorbed will result in blindness, coma, and death. In response to this need, we have developed electrolyte-free methanol electrolysis and ethanol electrolysis based on the nanogap electrochemical cells for the methanol and ethanol sensing. Upon applying a voltage, a high electric field across the nanogap cell enhances the solution ionization and the ion transport rate. Moreover, the nanoscale distance between the electrodes provides a shorter path for electrolysis to easily occur. The nanogap electrochemical cells not only make the direct electrolyte-free organic solvent electrolysis possible but also enhance the sensitivity of the chemical of interest in low-concentration solutions without the influence of the added electrolyte. The nanogap electrochemical cells have been demonstrated having high sensitivity to detect 0.15% methanol volume concentration in deionized water solutions without adding any electrolyte, and its ability for the fake alcoholic beverages' detection has successfully demonstrated.
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46
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Unmüssig T, Melke J, Fischer A. Synthesis of Pt@TiO2 nanocomposite electrocatalysts for enhanced methanol oxidation by hydrophobic nanoreactor templating. Phys Chem Chem Phys 2019; 21:13555-13568. [DOI: 10.1039/c9cp00502a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work Pt@TiO2 nanocomposite electrocatalysts for methanol oxidation were synthesized using a one-pot process by hydrophobic nanoreactor templating.
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Affiliation(s)
- Tobias Unmüssig
- Institute for Inorganic and Analytical Chemistry
- University of Freiburg
- 79104 Freiburg
- Germany
- FMF – Freiburg Materials Research Center
| | - Julia Melke
- Institute for Inorganic and Analytical Chemistry
- University of Freiburg
- 79104 Freiburg
- Germany
- FMF – Freiburg Materials Research Center
| | - Anna Fischer
- Institute for Inorganic and Analytical Chemistry
- University of Freiburg
- 79104 Freiburg
- Germany
- FMF – Freiburg Materials Research Center
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Tomaschun G, Klüner T. Methanol oxidation on the Pt(321) surface: a theoretical approach on the role of surface morphology and surface coverage effects. Phys Chem Chem Phys 2019; 21:18227-18239. [DOI: 10.1039/c9cp03291f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigated methanol oxidation, decomposition and carbonylation reactions on a high indexed Pt(321) surface.
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Affiliation(s)
- Gabriele Tomaschun
- Department of Chemistry
- Carl von Ossietzky University Oldenburg
- 26129 Oldenburg
- Germany
| | - Thorsten Klüner
- Department of Chemistry
- Carl von Ossietzky University Oldenburg
- 26129 Oldenburg
- Germany
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Ramli ZAC, Kamarudin SK. Platinum-Based Catalysts on Various Carbon Supports and Conducting Polymers for Direct Methanol Fuel Cell Applications: a Review. NANOSCALE RESEARCH LETTERS 2018; 13:410. [PMID: 30578446 PMCID: PMC6303228 DOI: 10.1186/s11671-018-2799-4] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/14/2018] [Indexed: 05/19/2023]
Abstract
Platinum (Pt)-based nanoparticle metals have received a substantial amount of attention and are the most popular catalysts for direct methanol fuel cell (DMFC). However, the high cost of Pt catalysts, slow kinetic oxidation, and the formation of CO intermediate molecules during the methanol oxidation reaction (MOR) are major challenges associate with single-metal Pt catalysts. Recent studies are focusing on using either Pt alloys, such as Fe, Ni, Co, Rh, Ru, Co, and Sn metals, or carbon support materials to enhance the catalytic performance of Pt. In recent years, Pt and Pt alloy catalysts supported on great potential of carbon materials such as MWCNT, CNF, CNT, CNC, CMS, CNT, CB, and graphene have received remarkable interests due to their significant properties that can contribute to the excellent MOR and DMFC performance. This review paper summaries the development of the above alloys and support materials related to reduce the usage of Pt, improve stability, and better electrocatalytic performance of Pt in DMFC. Finally, discussion of each catalyst and support in terms of morphology, electrocatalytic activity, structural characteristics, and its fuel cell performance are presented.
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Affiliation(s)
- Z. A. C. Ramli
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Malaysia
| | - S. K. Kamarudin
- Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Malaysia
- Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Malaysia
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Tomassetti M, Angeloni R, Marchiandi S, Castrucci M, Sammartino MP, Campanella L. Direct Methanol (or Ethanol) Fuel Cell as Enzymatic or Non-Enzymatic Device, Used to Check Ethanol in Several Pharmaceutical and Forensic Samples. SENSORS (BASEL, SWITZERLAND) 2018; 18:E3596. [PMID: 30360499 PMCID: PMC6264087 DOI: 10.3390/s18113596] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/18/2018] [Accepted: 10/17/2018] [Indexed: 11/16/2022]
Abstract
It was already demonstrated by our research group that a direct catalytic methanol (or ethanol) fuel cell (DMFC) device can be used also for analytical purposes, such as the determination of ethanol content in beverages. In the present research we extended the application to the analysis of several ethanol-based pharmaceutical products, i.e., pharmaceutical tinctures (dyes) and disinfectants. In recent work we have also shown that the use of alcohol dehydrogenase enzyme as a component of the anodic section of a direct catalytic methanol (or ethanol) fuel cell significantly improves the performance of a simple DMFC device, making it more suitable to measure ethanol (or methanol) in real samples by this cell. At the same time, we have also shown that DMFC can respond to certain organic compounds that are more complex than methanol and ethanol and having R(R')CH-OH group in the molecule. Firstly, pharmaceutical dyes were analyzed for their ethanol content using the simple catalytic DMFC device, with good accuracy and precision. The results are illustrated in the present paper. Additionally, a detailed investigation carried out on commercial denatured alcoholic samples evidenced several interferences due to the contained additives. Secondly, we hypothesized that by using the enzymatic fuel cell it would be possible to improve the determination, for instance, of certain antibiotics, such as imipenem, or else carry out determinations of ethanol content in saliva and serum (simulating forensic tests, correlated to drivers "breath test"); even if this has already been hypothesized in previous papers, the present study is the first to perform them experimentally, obtaining satisfactory results. In practice, all of the goals which we proposed were reached, confirming the remarkable opportunities of the enzymatic (or non-enzymatic) DMFC device.
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Affiliation(s)
- Mauro Tomassetti
- Department of Chemistry, "La Sapienza" University of Rome, 00185 Rome, Italy.
| | - Riccardo Angeloni
- Department of Chemistry, "La Sapienza" University of Rome, 00185 Rome, Italy.
| | - Sergio Marchiandi
- Department of Chemistry, "La Sapienza" University of Rome, 00185 Rome, Italy.
| | - Mauro Castrucci
- Department of Chemistry, "La Sapienza" University of Rome, 00185 Rome, Italy.
| | | | - Luigi Campanella
- Department of Chemistry, "La Sapienza" University of Rome, 00185 Rome, Italy.
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50
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Trincado M, Vogt M. CO2-based hydrogen storage – hydrogen liberation from methanol/water mixtures and from anhydrous methanol. PHYSICAL SCIENCES REVIEWS 2018. [DOI: 10.1515/psr-2017-0014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
New strategies for the reforming of methanol under mild conditions on the basis of heterogeneous and molecular catalysts have raised the hopes and expectations on this fuel. This contribution will focus on the progress achieved in the production of hydrogen from aqueous and anhydrous methanol with molecular and heterogeneous catalysts. The report entails thermal approaches, as well as light-triggered dehydrogenation reactions. A comparison of the efficiency and mechanistic aspects will be made and principles of catalytic pathways operating in biological systems will be also addressed.
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