Enhanced methanol electro-oxidation reaction on Pt-CoOx/MWCNTs hybrid electro-catalyst
Source abstract
Abstract
Abstract The electro-catalytic behavior of Pt-CoO x /MWCNTs in methanol electro-oxidation reaction (MOR) is investigated and compared to that of Pt/MWCNTs. The electro-catalysts were synthesized by an impregnation method using NaBH 4 as the reducing agent. The morphological and physical characteristics of samples are examined by XRD, TEM, ICP and EDS techniques. In the presence of CoO x , Pt nanoparticles were highly distributed on the support with an average particle size of 2 nm, an obvious decrease from 5.1 nm for Pt/MWCNTs. Cyclic voltammetry, CO-stripping, Chronoamperometry, and electrochemical impedance spectroscopy (EIS) measurements are used to study the electrochemical behavior of the electro-catalysts. The results revealed a considerable enhancement in the oxidation kinetics of CO ads on Pt active sites by the participation of CoO x . Compared to Pt/MWCNTs, Pt-CoO x /MWCNTs sample has a larger electrochemical active surface area (ECSA) and higher electro-catalytic activity and stability toward methanol electro-oxidation. According to the results of cyclic voltammetry, the forward anodic peak current density enhances more than 89% at the optimum atomic ratio of Pt:Co = 2:1. Furthermore, inclusion of cobalt oxide species causes the onset potential of methanol electro-oxidation reaction to shift 84 mV to negative values compared to that on Pt/MWCNTs. Based on EIS data, dehydrogenation of methanol is the rate-determining step of MOR on both Pt/MWCNTs and Pt-CoO x /MWCNTs, at small overpotentials. However, at higher overpotentials, the oxidation of adsorbed oxygen-containing groups controls the total rate of MOR process.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (69)
Show source-provided references
1. High stability of low Pt loading high surface area electrocatalysts supported on functionalized carbon nanotubes10.1016/j.jpowsour.2012.12.025 ↗
2. Pt supported on phosphorus-doped carbon nanotube as an anode catalyst for direct methanol fuel cells10.1016/j.elecom.2011.11.033 ↗
3. Highly catalytic activity of Pt electro-catalyst supported on sulphated SnO2/multi-walled carbon nanotube composites for methanol electro-oxidation10.1016/j.jpowsour.2011.10.017 ↗
4. Synthesis and characterization of platinum nanoparticles on carbon nanosheets with enhanced electrocatalytic activity toward methanol oxidation10.1016/j.apsusc.2012.07.022 ↗
5. A facile preparation of Pt–Ru nanoparticles supported on polyaniline modified fullerene [60] for methanol oxidation10.1007/s11051-013-2061-z ↗
6. Methanol electrooxidation on well-characterized platinum-ruthenium bulk alloys10.1021/j100148a030 ↗
7. In situ FTIRS study of the electrocatalytic oxidation of carbon monoxide and methanol at platinum–ruthenium bulk alloy electrodes10.1016/S0022-0728(97)00558-5 ↗
8. Dependence of CH3OH oxidation activity for a wide range of PtRu alloys detailed analysis and new views10.1149/1.1768545 ↗
9. Porous-micro electrode study on Pt/C catalysts for methanol electrooxidation10.1016/S0013-4686(03)00002-1 ↗
10. Synthesis and catalytic performance of PtRuMo nanoparticles supported on graphene-carbon nanotubes nanocomposites for methanol electro-oxidation10.1016/S1452-3981(23)13412-2 ↗
11. Carbon nanotubes embedded with PtRu nanoparticles as methanol fuel cell electrocatalysts10.1016/j.physe.2008.08.060 ↗
12. Synthesis of boron and nitrogen doped graphene supporting PtRu nanoparticles as catalysts for methanol electrooxidation
13. Enhanced activity of rare earth doped PtRu/C catalysts for methanol electro-oxidation10.1016/j.electacta.2011.07.106 ↗
14. Graphene–CeO2 hybrid support for Pt nanoparticles as potential electrocatalyst for direct methanol fuel cells10.1016/j.electacta.2013.01.149 ↗
15. Platinum nanoparticles supported on pore-arrayed tungsten trioxide as electrocatalyst for methanol oxidation10.1016/j.ijhydene.2013.02.123 ↗
16. Methanol oxidation reaction on PtSnO2 obtained by microwave-assisted chemical reduction10.1016/j.ijhydene.2011.10.049 ↗
17. A novel preparation method of Sn-modified Pt nanoparticles and application for methanol oxidation10.1016/j.apsusc.2008.07.147 ↗
18. Preparation and characterization of core–shell-like PbPt nanoparticles electro-catalyst supported on graphene for methanol oxidation10.1016/j.ijhydene.2013.12.075 ↗
19. PtNi supported on oxygen functionalized carbon nanotubes: In depth structural characterization and activity for methanol electrooxidation10.1016/j.apcatb.2013.06.013 ↗
20. PtNi alloy nanoparticles supported on polyelectrolyte functionalized graphene as effective electrocatalysts for methanol oxidation10.1149/2.056303jes ↗
21. Novel anode catalyst for direct methanol fuel cells10.1155/2014/547604 ↗
22. Hollow nanoporous Au/Pt core–shell catalysts with nanochannels and enhanced activities towards electro-oxidation of methanol and ethanol10.1016/j.ijhydene.2014.03.193 ↗
23. Coverage-dependent electro-catalytic activity of Pt sub-monolayer/Au bi-metallic catalyst toward methanol oxidation10.1016/j.ijhydene.2013.03.024 ↗
24. Metal oxide promoters for methanol electro-oxidation10.1016/j.ijhydene.2014.04.100 ↗
25. Influence of metal oxides on Pt catalysts for methanol electrooxidation using electrochemical impedance spectroscopy10.1016/j.jpowsour.2008.11.095 ↗
26. Metal oxide promoted electrocatalysts for methanol oxidation10.1007/s10563-011-9124-x ↗
27. A durable RuO2-carbon-supported Pt catalyst for PEFCs: a cause and effect study10.1149/2.jes113440 ↗
28. Synthesis and characterization of Pt-WO3 as methanol oxidation catalysts for fuel cells10.1021/jp053053h ↗
29. Promotion of carbon nanotube-supported Pt catalyst for methanol and ethanol electro-oxidation by ZrO2 in acidic media10.1016/j.apcata.2009.04.046 ↗
30. Electro-oxidation of methanol on co-deposited Pt-MoO x prepared by cyclic voltammetry with different scanning potential ranges10.1007/s10800-008-9755-4 ↗
31. Methanol oxidation on MoO3 promoted Pt/C electrocatalyst10.1016/j.ijhydene.2011.01.122 ↗
32. Unique electrochemical catalytic behavior of Pt nanoparticles deposited on TiO2 nanotubes10.1021/cs200691a ↗
33. Enhanced activity of methanol electro-oxidation on Pt–V2O5/C catalysts10.1016/j.cattod.2008.03.019 ↗
34. High performance Pt–Nb2O5/C electrocatalysts for methanol electrooxidation in acidic media10.1016/j.apcatb.2010.09.001 ↗
35. Novel Pt/CeO 2/C catalysts for electrooxidation of alcohols in alkaline media10.1039/b408589b ↗
36. Highly dispersed Pt nanoparticles supported on manganese oxide–poly (3, 4 ethylenedioxythiophene)–carbon nanotubes composite for enhanced methanol electrooxidation10.1016/j.jpowsour.2013.03.051 ↗
37. Polymer-assisted hydrothermal synthesis of highly reducible shuttle-shaped CeO2: microstructural effect on promoting Pt/C for methanol electrooxidation10.1021/cs300473e ↗
38. Effects of preparation conditions on performance of carbon-supported nanosize Pt-Co catalysts for methanol electrooxidation under acidic conditions10.1016/j.jpowsour.2004.08.022 ↗
39. Carbon supported Pt75M25 (M=Co, Ni) alloys as anode and cathode electrocatalysts for direct methanol fuel cells10.1016/j.jelechem.2005.03.023 ↗
40. Pt-Co/C nanoparticles as electrocatalysts for oxygen reduction in H2SO4 and H2SO4/CH3OH electrolytes10.1016/j.electacta.2006.05.019 ↗
41. Fast and facile preparation of reduced graphene oxide supported Pt–Co electrocatalyst for methanol oxidation10.1016/j.materresbull.2012.02.025 ↗
42. Low-defect multi-walled carbon nanotubes supported PtCo alloy nanoparticles with remarkable performance for electrooxidation of methanol10.1016/j.electacta.2012.06.129 ↗
43. Preparation of Pt nanoparticles on different carbonaceous structure and their applications to methanol electro-oxidation10.1016/j.apsusc.2012.12.115 ↗
44. PtRu nanoparticles supported on nitrogen-doped multiwalled carbon nanotubes as catalyst for methanol electrooxidation10.1016/j.electacta.2009.02.073 ↗
45. Functional multi-walled carbon nanotube/polysiloxane composite films as supports of PtNi alloy nanoparticles for methanol electro-oxidation10.1016/j.apsusc.2008.04.017 ↗
46. MnO2 modified multi-walled carbon nanotubes supported Pd nanoparticles for methanol electro-oxidation in alkaline media
47. Nanoporous PtCo and PtNi alloy ribbons for methanol electrooxidation10.1016/j.ijhydene.2012.04.041 ↗
48. Pt-CeO2/C anode catalyst for direct methanol fuel cells10.1016/j.apcatb.2008.06.017 ↗
49. Enhancement in methanol oxidation by spontaneously deposited ruthenium on low-index platinum electrodes10.1023/A:1019042329841 ↗
50. Activated carbon nanotubes-supported catalyst in fuel cells10.1016/j.electacta.2008.06.026 ↗
51. Platinum nanoparticles self-assembled onto chitosan membrane as anode for direct methanol fuel cell10.1007/s10800-011-0273-4 ↗
52. The effect of experimental parameters on the synthesis of carbon nanotube/nanofiber supported platinum by polyol processing techniques10.1016/j.carbon.2008.05.007 ↗
53. In situ synthesis of Pt/carbon nanofiber nanocomposites with enhanced electrocatalytic activity toward methanol oxidation10.1016/j.jcis.2011.10.040 ↗
54. Electrocatalytic Pathways on Carbon-Supported Platinum Nanoparticles: Comparison of Particle-Size-Dependent Rates of Methanol, Formic Acid, and Formaldehyde Electrooxidation10.1021/la0200459 ↗
55. Mean coordination numbers and the non-metal–metal transitioninclusters10.1039/FT9928801107 ↗
56. Nanoparticle size effects on methanol electrochemical oxidation on carbon supported platinum catalysts10.1021/jp063337h ↗
57. Electrocatalytic activity of binary and ternary composite films of Pd, MWCNT, and Ni for ethanol electro-oxidation in alkaline solutions10.1016/j.carbon.2008.10.006 ↗
58. Study of methanol oxidation of hydrothermally synthesized PtRuMo on multi wall carbon nanotubes10.1016/j.apsusc.2011.04.125 ↗
59. Effect of platinum present in multi-element nanoparticles on methanol oxidation10.1016/j.jallcom.2008.12.055 ↗
60. Electrochamical oxidation of ethanol on Pt-CeO2/C catalysts10.1016/j.jpowsour.2004.10.017 ↗
61. Preparation of Pt/CeO2/HCSs anode electrocatalysts for direct methanol fuel cells10.1016/j.electacta.2010.08.021 ↗
62. Preparation of Pt/MgO/CNT hybrid catalysts and their electrocatalytic properties for ethanol electrooxidation10.1021/ef060452i ↗
63. Pt nanorods aggregates with enhanced electrocatalytic activity toward methanol oxidation
64. Kinetics of CH3OH oxidation on PtRu/C studied by impedance and CO stripping voltammetry10.1016/j.jelechem.2004.10.018 ↗
65. Electrochemical impedance studies of methanol electro-oxidation on Pt/C thin film electrode10.1149/1.1467940 ↗
66. Electrochemical impedance studies on carbon supported PtRuNi and PtRu anode catalysts in acid medium for direct methanol fuel cell10.1016/j.jpowsour.2006.12.027 ↗
67. Effect of electrochemical polarization of PtRu/C catalysts on methanol electrooxidation10.1016/j.electacta.2004.07.006 ↗
68. Impedance studies on mesocarbon microbeads supported Pt-Ru catalytic anode10.1016/S0378-7753(02)00527-X ↗
69. Impedance study of methanol oxidation on platinum electrodes10.1016/j.electacta.2005.10.050 ↗