26
|
Mello GA, Janete Giz M, Chatenet M, Camara GA. The electrooxidation of acetaldehyde on platinum–ruthenium–rhodium surfaces: A delicate balance between oxidation and carbon–carbon bond breaking. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2015.07.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
27
|
Oliveira VL, Sibert E, Soldo-Olivier Y, Ticianelli EA, Chatenet M. Borohydride electrooxidation reaction on Pt(111) and Pt(111) modified by a pseudomorphic Pd monolayer. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.01.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
28
|
Bach Delpeuch A, Jacquot M, Chatenet M, Cremers C. The influence of mass-transport conditions on the ethanol oxidation reaction (EOR) mechanism of Pt/C electrocatalysts. Phys Chem Chem Phys 2016; 18:25169-25175. [DOI: 10.1039/c6cp04294e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study aims to provide further understanding of the influence of different parameters that control mass-transport (the revolution rate of the rotating disk electrode and the potential scan rate) on the ethanol oxidation reaction (EOR).
Collapse
|
29
|
Delpeuch AB, Cremers C, Chatenet M. Impact of water adsorbates on the acetaldehyde oxidation reaction on Pt- and Rh-based multimetallic electrocatalysts. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.12.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
30
|
Olu PY, Bonnefont A, Rouhet M, Bozdech S, Job N, Chatenet M, Savinova E. Insights into the potential dependence of the borohydride electrooxidation reaction mechanism on platinum nanoparticles supported on ordered carbon nanomaterials. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.02.158] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
31
|
Bach Delpeuch A, Chatenet M, Rau MS, Cremers C. Influence of H- and OH-adsorbates on the ethanol oxidation reaction--a DEMS study. Phys Chem Chem Phys 2015; 17:10881-93. [PMID: 25820025 DOI: 10.1039/c5cp00132c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ethanol oxidation reaction (EOR) was investigated by potentiodynamic techniques on Pt/C, Rh/C, Pt-Rh/C, Pt-SnO2/C and Pt-Rh-SnO2/C by differential electrochemical mass spectrometry (DEMS) in a flow cell system. Prior to the cyclic voltammetries, adsorption of H- and OH-species was carried out by chronoamperometry at Ead = 0.05 and 1 V vs. RHE, respectively, in order to examine their influence on the EOR on the different electrocatalysts. For the sake of comparison, another adsorption potential was chosen at Ead = 0.3 V vs. RHE, in the double layer region (i.e. in the absence of such adsorbates). For this study, 20 wt% electrocatalysts were synthesized using a modified polyol method and were physically characterized by inductively coupled plasma atomic emission spectrometry (ICP-AES), X-ray diffraction (XRD) and transmission electron microscopy (TEM). When comparing the first and second cycles of the cyclic voltammograms (CVs) on Pt/C and Pt-SnO2/C, the presence of Had on the electrocatalyst surface seems to hinder the initiation of the ethanol electrooxidation, whereas the reaction onset potential is shifted negatively with the presence of OH-adsorbates. In contrast to them, the EOR on Rh/C is enhanced when the electrocatalyst surface is covered with Had and is inhibited after adsorption at Ead = 0.3 and 1 V vs. RHE. Finally, on Pt-Rh/C and Pt-Rh-SnO2/C, neither the H- nor OH-adsorbates do impact the EOR initiation. The lowest EOR onset was recorded on Pt-SnO2/C and Pt-Rh-SnO2/C electrocatalysts. The CO2 currency efficiency (CCE) was also determined for each electrocatalyst and demonstrated higher values on Pt-Rh-SnO2/C.
Collapse
|
32
|
Berthon-Fabry S, Dubau L, Ahmad Y, Guerin K, Chatenet M. First Insight into Fluorinated Pt/Carbon Aerogels as More Corrosion-Resistant Electrocatalysts for Proton Exchange Membrane Fuel Cell Cathodes. Electrocatalysis (N Y) 2015. [DOI: 10.1007/s12678-015-0267-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
33
|
Zadick A, Dubau L, Sergent N, Berthomé G, Chatenet M. Huge Instability of Pt/C Catalysts in Alkaline Medium. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01037] [Citation(s) in RCA: 268] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
34
|
Pasqualeti AM, Olu PY, Chatenet M, Lima FHB. Borohydride Electrooxidation on Carbon-Supported Noble Metal Nanoparticles: Insights into Hydrogen and Hydroxyborane Formation. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00107] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
35
|
Zadick A, Dubau L, Zalineeva A, Coutanceau C, Chatenet M. When cubic nanoparticles get spherical: An Identical Location Transmission Electron Microscopy case study with Pd in alkaline media. Electrochem commun 2014. [DOI: 10.1016/j.elecom.2014.07.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
36
|
Bach Delpeuch A, Chatenet M, Cremers C, Tübke T. Mass spectrometric investigation of ethanol and acetaldehyde adsorbates electrooxidation on Pt electrocatalyst. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.06.143] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
37
|
Castanheira L, Dubau L, Mermoux M, Berthomé G, Caqué N, Rossinot E, Chatenet M, Maillard F. Carbon Corrosion in Proton-Exchange Membrane Fuel Cells: From Model Experiments to Real-Life Operation in Membrane Electrode Assemblies. ACS Catal 2014. [DOI: 10.1021/cs500449q] [Citation(s) in RCA: 152] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
38
|
Durst J, Lopez-Haro M, Dubau L, Chatenet M, Soldo-Olivier Y, Guétaz L, Bayle-Guillemaud P, Maillard F. Reversibility of Pt-Skin and Pt-Skeleton Nanostructures in Acidic Media. J Phys Chem Lett 2014; 5:434-439. [PMID: 26276588 DOI: 10.1021/jz4025707] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Following a well-defined series of acid and heat treatments on a benchmark Pt3Co/C sample, three different nanostructures of interest for the electrocatalysis of the oxygen reduction reaction were tailored. These nanostructures could be sorted into the "Pt-skin" structure, made of one pure Pt overlayer, and the "Pt-skeleton" structure, made of 2-3 Pt overlayers surrounding the Pt-Co alloy core. Using a unique combination of high-resolution aberration-corrected STEM-EELS, XRD, EXAFS, and XANES measurements, we provide atomically resolved pictures of these different nanostructures, including measurement of the Pt-shell thickness forming in acidic media and the resulting changes of the bulk and core chemical composition. It is shown that the Pt-skin is reverted toward the Pt-skeleton upon contact with acid electrolyte. This change in structure causes strong variations of the chemical composition.
Collapse
|
39
|
Molina Concha M, Chatenet M, Montella C, Diard JP. A Faradaic impedance study of E-EAR reaction. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2013.02.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
40
|
Nikkuni FR, Ticianelli EA, Dubau L, Chatenet M. Identical-Location Transmission Electron Microscopy Study of Pt/C and Pt–Co/C Nanostructured Electrocatalyst Aging: Effects of Morphological and Compositional Changes on the Oxygen Reduction Reaction Activity. Electrocatalysis (N Y) 2013. [DOI: 10.1007/s12678-013-0126-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
41
|
Belén Molina Concha M, Chatenet M, Lima FH, Ticianelli EA. In situ Fourier transform infrared spectroscopy and on-line differential electrochemical mass spectrometry study of the NH3BH3 oxidation reaction on gold electrodes. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.11.027] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
42
|
Lima FH, Pasqualeti AM, Molina Concha MB, Chatenet M, Ticianelli EA. Borohydride electrooxidation on Au and Pt electrodes. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.05.030] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
43
|
Cantane D, Ambrosio W, Chatenet M, Lima F. Electro-oxidation of ethanol on Pt/C, Rh/C, and Pt/Rh/C-based electrocatalysts investigated by on-line DEMS. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.05.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
44
|
Durst J, Chatenet M, Maillard F. Impact of metal cations on the electrocatalytic properties of Pt/C nanoparticles at multiple phase interfaces. Phys Chem Chem Phys 2012; 14:13000-9. [DOI: 10.1039/c2cp42191g] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
45
|
Lamibrac A, Maranzana G, Dillet J, Lottin O, Didierjean S, Durst J, Dubau L, Maillard F, Chatenet M. Local Degradations Resulting from Repeated Start-ups and Shut-downs in Proton Exchange Membrane Fuel Cell (PEMFC). ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.egypro.2012.09.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
46
|
Dubau L, Durst J, Maillard F, Guétaz L, Chatenet M, André J, Rossinot E. Further insights into the durability of Pt3Co/C electrocatalysts: Formation of “hollow” Pt nanoparticles induced by the Kirkendall effect. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.03.073] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
47
|
Mello GA, Janete Giz M, Camara GA, Crisci A, Chatenet M. Search for multi-functional catalysts: The electrooxidation of acetaldehyde on Platinum–Ruthenium–Rhodium electrodeposits. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.06.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
48
|
Dubau L, Maillard F, Chatenet M, André J, Rossinot E. Nanoscale compositional changes and modification of the surface reactivity of Pt3Co/C nanoparticles during proton-exchange membrane fuel cell operation. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.09.038] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
49
|
Parrour G, Chatenet M, Diard JP. Electrochemical impedance spectroscopy study of borohydride oxidation reaction on gold—Towards a mechanism with two electrochemical steps. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.07.086] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
50
|
Maillard F, Dubau L, Durst J, Chatenet M, André J, Rossinot E. Durability of Pt3Co/C nanoparticles in a proton-exchange membrane fuel cell: Direct evidence of bulk Co segregation to the surface. Electrochem commun 2010. [DOI: 10.1016/j.elecom.2010.06.007] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
|