Electro-catalytic activity of enhanced CO tolerant cerium-promoted Pt/C catalyst for PEM fuel cell anode

Lin, Rui; Cao, Chunhui; Zhang, Haiyan; Huang, Huibo; Ma, Jinxing

doi:10.1016/j.ijhydene.2011.05.021

Cited by 56 publications

(29 citation statements)

References 44 publications

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“…Surface mobile oxygen species from Mo can then promote the oxidation of CO adsorbed on IrV active sites to CO 2 at lower potentials. Therefore, we conclude that the synergistic effect between IrV and Mo in our catalyst system is a key role in the enhancement of CO electro-oxidation [36].…”

Section: Possible Mechanismmentioning

confidence: 65%

New non-platinum Ir–V–Mo electro-catalyst, catalytic activity and CO tolerance in hydrogen oxidation reaction

Higgins

Yang

et al. 2012

International Journal of Hydrogen Energy

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Section: Possible Mechanismmentioning

confidence: 65%

New non-platinum Ir–V–Mo electro-catalyst, catalytic activity and CO tolerance in hydrogen oxidation reaction

Higgins

Yang

et al. 2012

International Journal of Hydrogen Energy

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“…Whether a co-catalyst or support for making a Pt catalyst CO-tolerant is alloying metal or metal oxide, the underlying mechanism for CO tolerance is usually adopted from the aforementioned bifunctional mechanism. Otherwise, a change in electronic state of Pt resulting from a coupling with RhO2 [8] or a spillover effect of CeO2 [15] is stated as the CO tolerance mechanism.…”

Section: Physicochemical Properties Of Carbon-supported Pt-beomentioning

confidence: 99%

“…Oxides of noble metals such as RhO 2 [8] and RuO 2 [9] were also reported as having a CO-tolerant effect. Among transition metal oxides, WO x [10][11][12] is one of frequently reported CO-tolerant materials along with MoO x [13,14] and CeO x [15,16]. Whether a co-catalyst or support for making a Pt catalyst CO-tolerant is alloying metal or metal oxide, the underlying mechanism for CO tolerance is usually adopted from the aforementioned bifunctional mechanism.…”

Section: Introductionmentioning

confidence: 99%

CO-Tolerant Pt–BeO as a Novel Anode Electrocatalyst in Proton Exchange Membrane Fuel Cells

Kwon

Jung

et al. 2016

Catalysts

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Commercialization of proton exchange membrane fuel cells (PEMFCs) requires less expensive catalysts and higher operating voltage. Substantial anodic overvoltage with the usage of reformed hydrogen fuel can be minimized by using CO-tolerant anode catalysts. Carbon-supported Pt-BeO is manufactured so that Pt particles with an average diameter of 4 nm are distributed on a carbon support. XPS analysis shows that a peak value of the binding energy of Be matches that of BeO, and oxygen is bound with Be or carbon. The hydrogen oxidation current of the Pt-BeO catalyst is slightly higher than that of a Pt catalyst. CO stripping voltammetry shows that CO oxidation current peaks at~0.85 V at Pt, whereas CO is oxidized around 0.75 V at Pt-BeO, which confirms that the desorption of CO is easier in the presence of BeO. Although the state-of-the-art PtRu anode catalyst is dominant as a CO-tolerant hydrogen oxidation catalyst, this study of Be-based CO-tolerant material can widen the choice of PEMFC anode catalyst.

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“…11, 2016 and PtRuSn/C) the ECSA is sometimes estimated by the charge involved in the H desorption region. [2][3][4][5] For Pd-based catalysts, the ECSA is usually calculated by the charge involved in the reduction of a PdO monolayer. [6][7][8] The main concern about using the ECSA for multi-metallic catalysts calculated by these methods lies on the fact that the metal lattice parameter suffers intense modifications when an additional element is inserted into its structure.…”

Section: Introductionmentioning

confidence: 99%

Estimating the Time-Dependent Performance of Nanocatalysts in Fuel Cells Based on a Cost-Normalization Approach

Zanata¹,

Fernández²,

Santos³

et al. 2016

Journal of the Brazilian Chemical Society

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Researchers have developed new catalysts for fuel cells (FC), whose performances are compared after applying different normalization procedures. However, there is not a standard procedure. The current produced from CO electrooxidation was compared for Pt 4 Ru 5 Sn 1 /C and homemade Pt/C nanoparticles (NPs) normalized by different methods and the use of different methods renders different interpretations. Since the whole field aims to maximize the cost-effectiveness, a complementary method to normalize currents and power in terms of the total cost of the nanocatalyst, the Catalyst-based Cost method (CbC), was proposed. CbC considers the cost of all metals employed to build the catalyst, not only those ones with available surfaces. By applying a simple smoothing method on the prices in a time series, we were able to forecast the prices and consequently the power density of a FC. CbC provides tools for industrials forecast the designing of nanomaterials with improved efficiency and low cost.Keywords: fuel cell, catalyst, normalization of current and power, cost of metal, forecasting activity IntroductionThe continuous growth of the energy demand opened a wide field of research for energy converters, among which fuel cells have been exhaustively studied. Fuel cells can produce energy with low environmental impact since they generate power by the oxidation of a fuel at the anode and reduction of O 2 at the cathode. Fuel cells can be fed by H 2 or small alcohols, as methanol and ethanol. The catalysts, both anodes and cathodes, are mainly based on Pt, which is historically an expensive material.1 This is the main reason why many efforts have been made to replace Pt (at least partially) in catalysts used in fuel cells.When a new nanoparticle catalyst is produced, the normalization of the electrochemical current generated by its use is imperative in electrocatalysis, since this procedure allows distinct surfaces to be directly compared for a given reaction in terms of their intrinsic electroactivities. In this context, different normalization methods generate multiple interpretations about the activity of a catalyst. This lack of consensus hinders the comparison of different materials in terms of their electrochemical performances and generates impasses that prevent a faster development of the research area.A method commonly used consists in normalizing the currents by the electrochemically active surface area (ECSA), which is highly useful but not easily accessed for many materials. For Pt-based catalysts (as PtRu/C Zanata et al. 1981 Vol. 27, No. 11, 2016 and PtRuSn/C) the ECSA is sometimes estimated by the charge involved in the H desorption region.2-5 For Pd-based catalysts, the ECSA is usually calculated by the charge involved in the reduction of a PdO monolayer. [6][7][8] The main concern about using the ECSA for multi-metallic catalysts calculated by these methods lies on the fact that the metal lattice parameter suffers intense modifications when an additional element is inserted into its structure. 9,10 In t...

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Electro-catalytic activity of enhanced CO tolerant cerium-promoted Pt/C catalyst for PEM fuel cell anode

Cited by 56 publications

References 44 publications

New non-platinum Ir–V–Mo electro-catalyst, catalytic activity and CO tolerance in hydrogen oxidation reaction

New non-platinum Ir–V–Mo electro-catalyst, catalytic activity and CO tolerance in hydrogen oxidation reaction

CO-Tolerant Pt–BeO as a Novel Anode Electrocatalyst in Proton Exchange Membrane Fuel Cells

Estimating the Time-Dependent Performance of Nanocatalysts in Fuel Cells Based on a Cost-Normalization Approach

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