Reformate gas composition and pressure effect on CO tolerant Pt/Ti0.8Mo0.2O2–C electrocatalyst for PEM fuel cells

M. Suha Yazici; Sümeyye Dursun; Irina Borbáth; András Tompos

doi:10.1016/j.ijhydene.2020.08.226

Reformate gas composition and pressure effect on CO tolerant Pt/Ti_0.8Mo_0.2O₂–C electrocatalyst for PEM fuel cells

M. Suha Yazici^*, Sümeyye Dursun, Irina Borbáth, András Tompos

^*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

22 Atıf (Scopus)

Özet

Mixed-oxide coated Ti_0.8Mo_0.2O₂–C composite supported 20 wt% Pt electrocatalysts with Ti_0.8Mo_0.2O₂/C=75/25 mass ratio were developed for CO tolerance of polymer electrolyte membrane fuel cell (PEMFC) anode. Studies of the structure, composition and stability, as well as the results of CO_ads stripping confirmed that the mixed oxide composite support and the electrocatalyst prepared for this study show the well-documented characteristics of the Pt/Ti_1-xMo_xO₂-C systems with enhanced CO tolerance compared to the Pt/C catalyst. Dilution of hydrogen with CO₂ and CH₄ had negligible negative impact on the fuel cell performance. Switching gas composition between hydrogen and reformate shows recovery of potential after CO poisoning. Nevertheless, anode catalyst loading of 0.25 and 0.5 mgPt/cm² was not enough to give reasonable performance when CO impurity was present. Loading of 0.85 mgPt/cm² Ti_0.8Mo_0.2O₂–C supported catalyst was effective to give 1000 mA/cm² current density at 0.6 V under 25 ppm CO and 30 psig. Higher loading was needed at mass transfer limited region to overcome poisoning. However, loadings higher than 0.85 mgPt/cm² caused mass transfer limitations. Hence higher loadings is proposed with 40 wt% Pt/Ti_0.8Mo_0.2O₂–C support catalyst.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	13524-13533
Sayfa sayısı	10
Dergi	International Journal of Hydrogen Energy
Hacim	46
Basın numarası	25
DOI'lar	https://doi.org/10.1016/j.ijhydene.2020.08.226
Yayın durumu	Yayınlandı - 9 Nis 2021
Harici olarak yayınlandı	Evet

Bibliyografik not

Publisher Copyright:
© 2020 Hydrogen Energy Publications LLC

Finansman

Financial support provided by the TUBITAK ARDEB of Turkey under contract # 217M926 is greatly acknowledged. Project No. NNE130004 has been implemented with the support provided from the National Research, Development and Innovation Fund of Hungary , financed under the TR–NN–17 funding scheme. The research within project No. VEKOP-2.3.2-16-2017-00013 was supported by the European Union and the State of Hungary , co-financed by the European Regional Development Fund. The authors thank Dr. Gábor P. Szijjártó for the catalyst preparation and electrochemical characterization and Ms. Ildikó Turi for the technical assistance. The authors thank Dr. Á. Vass for the interest and helpful discussion of this work.

Finansörler	Finansör numarası
National Research, Development and Innovation Fund of Hungary	VEKOP-2.3.2-16-2017-00013
TUBITAK ARDEB	217M926, NNE130004
European Commission
European Regional Development Fund

BM SKH

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Belgeye Erişim

10.1016/j.ijhydene.2020.08.226

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Reformate gas composition and pressure effect on CO tolerant Pt/Ti0.8Mo0.2O2–C electrocatalyst for PEM fuel cells",

abstract = "Mixed-oxide coated Ti0.8Mo0.2O2–C composite supported 20 wt% Pt electrocatalysts with Ti0.8Mo0.2O2/C=75/25 mass ratio were developed for CO tolerance of polymer electrolyte membrane fuel cell (PEMFC) anode. Studies of the structure, composition and stability, as well as the results of COads stripping confirmed that the mixed oxide composite support and the electrocatalyst prepared for this study show the well-documented characteristics of the Pt/Ti1-xMoxO2-C systems with enhanced CO tolerance compared to the Pt/C catalyst. Dilution of hydrogen with CO2 and CH4 had negligible negative impact on the fuel cell performance. Switching gas composition between hydrogen and reformate shows recovery of potential after CO poisoning. Nevertheless, anode catalyst loading of 0.25 and 0.5 mgPt/cm2 was not enough to give reasonable performance when CO impurity was present. Loading of 0.85 mgPt/cm2 Ti0.8Mo0.2O2–C supported catalyst was effective to give 1000 mA/cm2 current density at 0.6 V under 25 ppm CO and 30 psig. Higher loading was needed at mass transfer limited region to overcome poisoning. However, loadings higher than 0.85 mgPt/cm2 caused mass transfer limitations. Hence higher loadings is proposed with 40 wt% Pt/Ti0.8Mo0.2O2–C support catalyst.",

keywords = "CO tolerance, Composite materials, Fuel cell, Pt electrocatalyst, Reformate",

author = "Yazici, {M. Suha} and S{\"u}meyye Dursun and Irina Borb{\'a}th and Andr{\'a}s Tompos",

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T1 - Reformate gas composition and pressure effect on CO tolerant Pt/Ti0.8Mo0.2O2–C electrocatalyst for PEM fuel cells

AU - Yazici, M. Suha

AU - Dursun, Sümeyye

AU - Borbáth, Irina

AU - Tompos, András

PY - 2021/4/9

Y1 - 2021/4/9

N2 - Mixed-oxide coated Ti0.8Mo0.2O2–C composite supported 20 wt% Pt electrocatalysts with Ti0.8Mo0.2O2/C=75/25 mass ratio were developed for CO tolerance of polymer electrolyte membrane fuel cell (PEMFC) anode. Studies of the structure, composition and stability, as well as the results of COads stripping confirmed that the mixed oxide composite support and the electrocatalyst prepared for this study show the well-documented characteristics of the Pt/Ti1-xMoxO2-C systems with enhanced CO tolerance compared to the Pt/C catalyst. Dilution of hydrogen with CO2 and CH4 had negligible negative impact on the fuel cell performance. Switching gas composition between hydrogen and reformate shows recovery of potential after CO poisoning. Nevertheless, anode catalyst loading of 0.25 and 0.5 mgPt/cm2 was not enough to give reasonable performance when CO impurity was present. Loading of 0.85 mgPt/cm2 Ti0.8Mo0.2O2–C supported catalyst was effective to give 1000 mA/cm2 current density at 0.6 V under 25 ppm CO and 30 psig. Higher loading was needed at mass transfer limited region to overcome poisoning. However, loadings higher than 0.85 mgPt/cm2 caused mass transfer limitations. Hence higher loadings is proposed with 40 wt% Pt/Ti0.8Mo0.2O2–C support catalyst.

AB - Mixed-oxide coated Ti0.8Mo0.2O2–C composite supported 20 wt% Pt electrocatalysts with Ti0.8Mo0.2O2/C=75/25 mass ratio were developed for CO tolerance of polymer electrolyte membrane fuel cell (PEMFC) anode. Studies of the structure, composition and stability, as well as the results of COads stripping confirmed that the mixed oxide composite support and the electrocatalyst prepared for this study show the well-documented characteristics of the Pt/Ti1-xMoxO2-C systems with enhanced CO tolerance compared to the Pt/C catalyst. Dilution of hydrogen with CO2 and CH4 had negligible negative impact on the fuel cell performance. Switching gas composition between hydrogen and reformate shows recovery of potential after CO poisoning. Nevertheless, anode catalyst loading of 0.25 and 0.5 mgPt/cm2 was not enough to give reasonable performance when CO impurity was present. Loading of 0.85 mgPt/cm2 Ti0.8Mo0.2O2–C supported catalyst was effective to give 1000 mA/cm2 current density at 0.6 V under 25 ppm CO and 30 psig. Higher loading was needed at mass transfer limited region to overcome poisoning. However, loadings higher than 0.85 mgPt/cm2 caused mass transfer limitations. Hence higher loadings is proposed with 40 wt% Pt/Ti0.8Mo0.2O2–C support catalyst.

KW - CO tolerance

KW - Composite materials

KW - Fuel cell

KW - Pt electrocatalyst

KW - Reformate

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