Journal ArticleDOI
Silicon Oxide-Encapsulated Platinum Thin Films as Highly Active Electrocatalysts for Carbon Monoxide and Methanol Oxidation
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TLDR
In this paper, a membrane-coated electrocatalyst (MCEC) architecture for alcohol oxidation is proposed, in which a thin, permeable silicon oxide (SiOx) nanomembrane encapsulates a well-defined Pt thin film.Abstract:
Direct alcohol fuel cells (DAFCs) have the potential to provide high power densities for transportation and portable applications. However, widespread use of DAFCs is greatly hindered by the lack of anode electrocatalysts that are inexpensive, stable, resistant to CO poisoning, and highly active toward alcohol oxidation. One promising approach to overcoming these challenges is to combine transition metal catalysts with oxide supports, such as SiO2, which are known to enhance alcohol oxidation by promoting CO oxidation at oxide|metal interfacial regions through the so-called bifunctional mechanism. Herein, we report on a membrane-coated electrocatalyst (MCEC) architecture for alcohol oxidation, in which a thin, permeable silicon oxide (SiOx) nanomembrane encapsulates a well-defined Pt thin film (SiOx|Pt). A key advantage of the MCEC design compared to oxide-supported nanoparticles is that the oxide encapsulation maximizes the density of oxide|metal interfacial sites between the SiOx and Pt catalyst. A seri...read more
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Boosting aerobic oxidative desulfurization performance in fuel oil via strong metal-edge interactions between Pt and h-BN
Peiwen Wu,Yingcheng Wu,Linlin Chen,Jing He,Mingqing Hua,Fengxia Zhu,Xiaozhong Chu,Jun Xiong,Minqiang He,Wenshuai Zhu,Huaming Li +10 more
TL;DR: In this article, strong metal-edge interactions (SMEI) between well-dispersed Pt NPs and hexagonal boron nitride (h-BN) support was constructed, and it was found that the charge transfers from B atoms in h-BN to PtNPs and from P NPs to N atoms in H-BN gave rise to an excellent stabilization of the nanoparticles without agglomeration after the reaction.
Journal ArticleDOI
Recent advances in graphene-based platinum and palladium electrocatalysts for the methanol oxidation reaction
Asad Ali,Pei Kang Shen +1 more
TL;DR: Graphene-based Pt and Pd nanoparticle approaches have been broadly explored and actively pursued to meet those demands to produce excellent electrocatalysts for the methanol oxidation reaction as mentioned in this paper.
Improving Oxygen Electrochemistry through Nanoscopic Confinement
TL;DR: In this article, a three-dimensional nanoscopic catalyst structure was proposed to circumvent the scaling relationship between adsorption energies of different reaction intermediates and the catalyst owing to confinement.
Journal ArticleDOI
Intrinsic Effect of Carbon Supports on the Activity and Stability of Precious Metal Based Catalysts for Electrocatalytic Alcohol Oxidation in Fuel Cells: A Review.
TL;DR: The doping of heteroatoms further facilitates the electrocatalytic activity for the AOR via the structural, bifunctional and electronic effect, in addition to the enhanced dispersion of PMG NPs in the carbon support.
Journal ArticleDOI
CO-Tolerant PEMFC Anodes Enabled by Synergistic Catalysis between Iridium Single-Atom Sites and Nanoparticles.
Xiaolong Yang,Xiaolong Yang,Ying Wang,Xian Wang,Xian Wang,Bingbao Mei,Ergui Luo,Ergui Luo,Yang Li,Yang Li,Qinglei Meng,Qinglei Meng,Zhao Jin,Zheng Jiang,Changpeng Liu,Changpeng Liu,Junjie Ge,Junjie Ge,Wei Xing,Wei Xing +19 more
TL;DR: In this paper, the authors report a proof-of-concept study, in which a novel catalyst comprising both Ir particles and Ir single-atom sites (IrNP @IrSA -N-C) addresses the CO poisoning issue.
References
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Journal ArticleDOI
Surface science studies of model fuel cell electrocatalysts
Nenad M. Markovic,Philip N. Ross +1 more
TL;DR: In this paper, the authors discuss progress in the understanding of electrocatalytic reactions through the study of model systems with surface spectroscopies and discuss the limitations of using pure metal single crystals and well-characterized bulk alloys as models for real catalysts.
Journal ArticleDOI
Methanol oxidation and direct methanol fuel cells: a selective review
S. Wasmus,A. Küver +1 more
TL;DR: A status report on development of the direct methanol fuel cell (DMFC) and relevant fundamental and applied electrochemistry is the objective of as discussed by the authors, where emphasis is put on strategies and approaches rather than on individual results.
Journal ArticleDOI
Electrocatalysis by ad-atoms: Part II. Enhancement of the oxidation of methanol on platinum by ruthenium ad-atoms
Masahiro Watanabe,Satoshi Motoo +1 more
TL;DR: The ad-electrode has the same electrocatalytic characteristics as the alloy electrode for the oxidation of methanol on the Ru-Pt catalyst system as discussed by the authors.
Journal ArticleDOI
Support materials for PEMFC and DMFC electrocatalysts—A review
Surbhi Sharma,Bruno G. Pollet +1 more
TL;DR: In this paper, the performance and issues associated with a variety of carbon based materials such as carbon nanotubes (CNT), carbon nanofibers (CNF), mesoporous carbon and graphene as well as non-carbonaceous based materials, e.g. titania, indium oxides, alumina, silica and tungsten oxide and carbide, ceria, zirconia nanostructures and conducting polymers catalyst support materials are clearly described in this review.