Sulfurized carbon xerogels as Pt support with enhanced activity for fuel cell applications

Alegre, Cinthia; Sebastián, David; Gálvez, María Elena; Moliner, R.; Lázaro, M.J.

doi:10.1016/j.apcatb.2016.03.070

Cited by 51 publications

(41 citation statements)

References 49 publications

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“…With a neatly prepared method, the chemical surfaces and textures produced will work brilliantly as catalyst support for fuel cell applications. Previous studies have shown that the special pore texture of adjustable carbon has minimized the mass transfer rate through the catalyst layer …”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have shown that the special pore texture of adjustable carbon has minimized the mass transfer rate through the catalyst layer. 18 Additionally, various methods can be used to modify the surface chemistry of carbon gels for example altering the precursor used at the stage of organic gel production, or the treatment method in the final stage of producing gel using gas or liquid. 19 Various functional groups can be introduced on the surface of carbon support through this method, which is essential in the preparation of catalyst-supported metals, thus determining the loading, dispersion, oxidation conditions, and metal phase stability.…”

Section: Introductionmentioning

confidence: 99%

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Current status, opportunities, and challenges in fuel cell catalytic application of aerogels

Shaari

Kamarudin

2019

Int J Energy Res

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Summary Aerogel is known as one of today's 10 advanced structures that have earned a special place in industry or research based on its very high porosity, high active surface area, and low density. There are various methods that can be used to produce it as well as make it easily produced in bulk as subtopics in this paper in Section 2.0. At present, aerogels are widely used in catalytic applications, energy storage, photocatalysts, membrane separation, and fuel cells. Aerogel application in fuel cell has been discussed in Section 3.0 which include carbon‐based aerogel, graphene‐based aerogel, other aerogel based, and non‐noble catalyst with aerogel. This article is a reference for researchers to identify the advantages and opportunities available to lower costs and improve the performance of fuel cell systems that rely heavily on cost‐rich catalysts such as platinum. Opportunities and challenges in developing aerogel structures in the future are also explained in Section 5.0 in this paper.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Current status, opportunities, and challenges in fuel cell catalytic application of aerogels

Shaari

Kamarudin

2019

Int J Energy Res

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“…Most fuel cells at low temperatures use Pt as a catalyst. [15][16][17] Ptbased alloys with other transition metals, especially nanostructured materials, exhibit higher performance because of the so-called bi-functional mechanism. [18][19][20] However, the surface of Pt as an anode catalyst is usually heavily poisoned by the strong adsorption of CO intermediates, which are produced during the oxidation of organic fuels, thereby resulting in lower catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Branched PdAu nanowires with superior electrocatalytic formic acid oxidation activities

2017

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“…Deliberate incorporation of sulfur into engineered porous carbons has benefits for directing the catalytic metal NPs to molecularly accessible sites on the carbon surface. [80,81,82,83] We previously reported a synthetic strategy to decorate carbon aerogels [81] and carbon nanofoam papers [84,85] with thiophene-like moieties. Chemically grafting 3-thiophene-carboxaldehye to the polymeric precursor foam, followed by pyrolysis to the conductive carbon aerogel/nanofoam analog, incorporates heterocyclic sulfur (up to 0.9 at.…”

Section: Gold Nanoparticle-modified Pyc~s and Hydrogen Evolution At Amentioning

confidence: 99%

Pyrolytic Carbon Films with Tunable Electronic Structure and Surface Functionality: A Planar Stand‐In for Electroanalysis of Energy‐Relevant Reactions

Parker

Sassin

et al. 2020

ChemElectroChem

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Fundamental charge‐transfer dynamics for technologically relevant carbons, such as disordered “hard” carbons, can be studied by designing planar mimics. We fabricate thin films of “pyrolytic carbon” (pyC) by decomposition of benzene at 1000 °C and examine the physical and electrochemical properties of the native pyC film, as well as variants after heteroatom doping, plasma oxidation, and metal nanoparticle modification. The pyC films are optically reflective at the macroscale, relatively planar (1–3 nm RMS roughness by atomic force microscopy) and disordered (via Raman scattering). Thiophenyl‐doped pyC films (0.6–1.7 atom % sulfur) suitably mimic the disorder, chemical state (X‐ray photoelectron spectroscopy), and work function (Kelvin probe) of a workhorse carbon black, Vulcan XC‐72. Using ferri/ferrocyanide as a redox probe, we find that oxygen functionalities enhance the heterogeneous electron‐transfer rate constant up to 3×, while high levels of sulfur dopants decrease the rate 2×. We also explore thiophenyl‐directed adsorption of Au nanoparticles and show that hydrogen evolution at 0.1 mA cm−2 occurs ∼95 mV more positive at <1 % Au@pyC∼S than at pyC∼S.

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Sulfurized carbon xerogels as Pt support with enhanced activity for fuel cell applications

Cited by 51 publications

References 49 publications

Current status, opportunities, and challenges in fuel cell catalytic application of aerogels

Current status, opportunities, and challenges in fuel cell catalytic application of aerogels

Branched PdAu nanowires with superior electrocatalytic formic acid oxidation activities

Pyrolytic Carbon Films with Tunable Electronic Structure and Surface Functionality: A Planar Stand‐In for Electroanalysis of Energy‐Relevant Reactions

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