Mesoporous TiN as a Noncarbon Support of Ag‐Rich PtAg Nanoalloy Catalysts for Oxygen Reduction Reaction in Alkaline Media

Cui, Zhiming; Yang, Minghui; Chen, Hao; Zhao, Mengtian; DiSalvo, Francis J.

doi:10.1002/cssc.201402726

Cited by 19 publications

(8 citation statements)

References 35 publications

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“…In another similar system, platinum nano particles embedded in hollow mesoporous graphitic spheres are stable at high temperatures (850 °C) and during accelerated electrochemical ageing 190 . In addition, a range of mesoporous non-carbonaceous supports has been widely studied to improve the stability of platinum catalysts 191,192 . Other approaches to reduce the cost are to alloy platinum with non-noble metals or to increase the surfacearea-to-volume ratio by creating mesostructured porous nanoparticles.…”

Section: Fuel Cellsmentioning

confidence: 99%

Mesoporous materials for energy conversion and storage devices

2016

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At present, more than 80% of the energy consumed globally is derived from non-renewable fossil fuels such as coal, oil and natural gas. The combustion of these fuels inevitably leads to the emission of CO 2 -a main driver of climate change and other serious environmental effects, including the emission of other dangerous gases. Although mitigating climate change is a multifaceted challenge, one of the pillars of any future low-carbon economy will be a substantially increased dependence on renewable and environmentally friendly energy sources and storage systems. Tremendous progress is being made in developing advanced technologies to meet these challenges. However, to enable the cost-effective, large-scale production of these technologies, further improvement of performance and efficiency is needed. Although unique challenges exist for each technology, the development of functional materials is crucial.Porous solids -in particular, mesoporous solids -are appealing materials in many energy applications owing to their ability to absorb and interact with guest species (including, but not limited to, lithium ions, hydrogen atoms and sulfur molecules) on their outer and inner surfaces, and in the pore spaces 1,2 . According to the International Union of Pure and Applied Chemistry (IUPAC) definition, porous materials are classified into three categories according to their pore sizes: micro porous (<2 nm), mesoporous (2-50 nm) or macro porous (>50 nm). Since the first report of mesoporous silica in the 1990s 3,4 , the variety of mesoporous materials available has rapidly expanded, encompassing a very broad range of compositions.Mesoporous materials have exceptional properties, including ultrahigh surface areas, large pore volumes, tunable pore sizes and shapes, and also exhibit nanoscale effects in their mesochannels and on their pore walls. These features are particularly advantageous for applications in energy conversion and storage [5][6][7][8][9][10] . In principle, high surface areas should provide a large number of reaction or interaction sites for surface or interface-related processes such as adsorption, separation, catalysis and energy storage; however, a high surface area does not necessarily translate to an improved performance in applications. Large pore volumes have shown promise in the loading of guest species and in the accommodation of the expansion and strain relaxation during repeated electrochemical energy storage processes. Uniform and tunable mesopore channels facilitate the transport of atoms, ions and large molecules through the bulk of the material, thereby increasing the number of active sites with high accessibility and overcoming the size restriction encountered with microporous materials. In addition, there are fascinating nanoconfinement effects in the voids of uniform mesochannels, which are advantageous in catalysis and energy storage. 3D nanometre-sized frameworks can produce extraordinary nanoscale effects (that is, surface and quantum effects) that result in mesoporous materials with u...

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Section: Fuel Cellsmentioning

confidence: 99%

Mesoporous materials for energy conversion and storage devices

2016

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“…Moreover, transition metal nitrides have the atomic structures in either fcc or hcp with the smaller nitrogen atoms occupying the interstitial sites, as those of metal or metal alloys, and thus often present some metal‐like properties . Both binary metal nitrides and ternary metal nitrides with two metal elements can exhibit a metal‐like behavior for ORR/OER catalysis and thus can be utilized for rechargeable metal–O 2 batteries . For example, Fu et al examined the electrochemical performances of a mesoporous ternary Ni–Fe nitride (Ni 3 FeN) material for rechargeable Zn–O 2 batteries ( Figure 11 a) .…”

Section: Aqueous Secondary Non‐li Metal–o2 Batteriesmentioning

confidence: 99%

“…[177] The formation of bimetallic sulfides by the addition of secondary metal element is considered as an approach to further enhance the catalytic performance of CoS x catalyst for ORR/ OER. [170,[180][181][182][183] For example, by the formation of a Zn-Co bimetallic sulfide nanoneedles/carbon fiber paper (CFP) as the catalytic cathode, the rechargeable Zn-O 2 batteries displayed an initial discharge potential of 1.18 V with a low overpotential (0.85 V), a high round-trip efficiency (58.1%), and an outstanding cycling stability (200 cycles) at 10 mA cm −2 . [184] Another type of bimetallic sulfides is thiospinel with a general formula of AB 2 S 4 , where A and B are nominally divalent and trivalent metals.…”

Section: Transition Metal Chalcogenidementioning

confidence: 99%

“…[188,189] Both binary metal nitrides and ternary metal nitrides with two metal elements can exhibit a metal-like behavior for ORR/OER catalysis and thus can be utilized for rechargeable metal-O 2 batteries. [180,[190][191][192][193][194][195][196][197][198][199][200][201][202][203][204][205][206][207][208] (Figure 11a). [196] Owing to the high electric conductivity of nitrides and the avoid use of carbon for possible carbon corrosion at high potentials, the Zn-O 2 battery showed an excellent cycling stability up to 300 cycles with a very small Adv.…”

Section: Transition Metal Nitridesmentioning

confidence: 99%

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Toward Promising Cathode Catalysts for Nonlithium Metal–Oxygen Batteries

Mei

Liao

Liang

et al. 2019

Advanced Energy Materials

118

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The success of Li–air/O2 batteries has brought extensive attention to the development of various promising non‐Li metal–O2 batteries, such as Zn–O2, Al–O2, Mg–O2 batteries, etc., which have exhibited unique advantages, such as low production cost, high energy density, and much enhanced safety. The versatile non‐Li metal–O2 batteries provide a better opportunity for meeting the practical requirements for sustainable energy supplies in various applications. A high‐performance cathode in non‐Li metal–O2 batteries that can effectively trigger both oxygen reduction and evolution reactions and thus boost the overall battery performance is of great research interest. In this article, a comprehensive review on the development of Li‐free metal–O2 batteries and particularly focusing on the oxygen catalytic cathodes for both primary and secondary non‐Li metal–O2 batteries is carefully performed. The current challenges and potential solutions are also outlined and proposed. Through carefully selecting and rationally designing promising catalytic cathodes, a series of non‐Li metal–oxygen batteries toward practical energy storage applications are highly anticipated.

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“…[15] Nanostructured TiNs hould be ac andidate catalyst support for PEMFCs, owing to its high electrical conductivity and relative corrosion resistances. [19] The Pt ORR activity and durability are enhanced by the incorporation of other metallice lements (e.g. Meanwhile, mesoporousT iN has served as an on-carbon support of PtAg alloys for the ORR in alkaline media, which exhibits much higher mass activity and durability than Pt/C catalysts.…”

mentioning

confidence: 99%

Vertically Aligned Titanium Nitride Nanorod Arrays as Supports of Platinum–Palladium–Cobalt Catalysts for Thin‐Film Proton Exchange Membrane Fuel Cell Electrodes

Jiang

Zhang

et al. 2016

ChemElectroChem

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The degradation of the carbon supports and high platinum (Pt) loading significantly hinder the wide adoption of proton exchange membrane fuel cells. In conventional electrodes, the ionomer binders introduce an undesirable, high oxygen‐transport resistance and cover the catalysts active sites. Herein, an advanced catalytic layer based on vertically aligned titanium nitride nanorod arrays (TiN NRs) is prepared, without additional ionomer or binders in the cathode. After supporting the thin‐film platinum–palladium–cobalt (PtPdCo) catalyst (Pt loading: 66.9 μm cm−2) onto TiN NRs, the ordered electrodes were investigated as the cathode of a single cell without additional ionomer in the catalytic layer. With this electrode architecture, the as‐synthesized electrode performs with a maximum power density of 390.5 mW cm−2 and cathode mass‐specific power density of 5.84 W mgPt−1. The 2000 potential cycles accelerated degradation test shows that the PtPdCo–TiN electrode is more stable than the commercial gas diffusion electrode.

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Mesoporous TiN as a Noncarbon Support of Ag‐Rich PtAg Nanoalloy Catalysts for Oxygen Reduction Reaction in Alkaline Media

Cited by 19 publications

References 35 publications

Mesoporous materials for energy conversion and storage devices

Mesoporous materials for energy conversion and storage devices

Toward Promising Cathode Catalysts for Nonlithium Metal–Oxygen Batteries

Vertically Aligned Titanium Nitride Nanorod Arrays as Supports of Platinum–Palladium–Cobalt Catalysts for Thin‐Film Proton Exchange Membrane Fuel Cell Electrodes

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