Graphene-supported small tungsten carbide nanocrystals promoting a Pd catalyst towards formic acid oxidation

He, Chunyong; Tao, J.; Ke, Yubin; Qiu, Yongfu

doi:10.1039/c5ra13028j

Cited by 39 publications

(34 citation statements)

References 61 publications

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“…Due to the harsh operating environment in DMFCs, it is still a great challenge to prepare feasible catalyst that satisfy the stability requirement for MOR. 36,45 Fig. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…[27][28][29][30] These TMCs show dramatical catalytic activity in a number of electrochemical energy conversion applications, including HER, [31][32][33][34] photocatalysts, 30 solar cells, 35 and fuel cells, [36][37][38] . [27][28][29][30] These TMCs show dramatical catalytic activity in a number of electrochemical energy conversion applications, including HER, [31][32][33][34] photocatalysts, 30 solar cells, 35 and fuel cells, [36][37][38] .…”

Section: Introductionmentioning

confidence: 99%

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Unravelling the promoting effect of the ultrathin TaC/RGO nanosheet hybrid for enhanced catalytic activity of Pd nanoparticles

Tao

et al. 2016

Catal. Sci. Technol.

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A novel two-dimension ultrathin TaC/reduced graphene oxide (RGO) nanosheets hybrid was applied as co-catalyst to Pd nanoparticles (Pd/TaC-G). Compare to Pd/C, the Pd/TaC-G exhibits remarkable enhanced catalytic activity, resistance to poisonous intermediates and durability for methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs). Experiment results from X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) reveal the synergetic chemical coupling between the Pd nanoparticles and TaC/RGO nanosheets hybrid, which is likely the origin of the enhanced catalytic activity of Pd/TaC-G. This work established a new strategy to overcome the drawbacks of the noble metal catalyst through improving the catalytic activity, resistance to poisonous intermediates and durability via a two-dimension hubird, providing a new approach to develop the next generation catalysts in DMFCs.

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“…Due to the harsh operating environment in DMFCs, it is still a great challenge to prepare feasible catalyst that satisfy the stability requirement for MOR. 36,45 Fig. Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Unravelling the promoting effect of the ultrathin TaC/RGO nanosheet hybrid for enhanced catalytic activity of Pd nanoparticles

Tao

et al. 2016

Catal. Sci. Technol.

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“…Later on, He et al [24] used a microwave assisting method, to synthesize tungsten carbide Nano crystals with a hexagonal prism shape on graphene (WCP/G). The WCP Nano crystals are 5 nm in size and dominated by (01-10), and (1-100) facets with a preferred orientation of [0001].…”

Section: Other Supporting Tactics For Pt-based and Pd-based Catalystsmentioning

confidence: 99%

“…TMCs are interesting because of their similar electronic structures to noble metals near the Fermi level (i.e., WC and Pt). WC has been studied as catalysts support, and as catalyst for oxygen reduction reaction (ORR) [21,22], methanol oxidation reaction (MOR) [23], formic acid oxidation [24] and hydrogen evolution reaction (HER) [25]. It is important to mention that catalytic performance of electrocatalysts is closely related to their shape and configuration, therefore formation of WC Nano crystals with controllable shape and structure is of considerable research interests.…”

Section: Introduction Overviewmentioning

confidence: 99%

“…However, they faced some difficulties to obtain small WC Nano crystals (especially sub-10 nm) with controllable morphology and structure. Recently, He et al [24] synthesized hexagonal prism-shaped WC Nano crystals of 5 nm in size via a microwave assisting route. Their finding showed that WCP Nano crystals were dominated by (01-10), and (1-100) facets with a preferred orientation of [0001].…”

Section: Introduction Overviewmentioning

confidence: 99%

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The Study of Pt and Pd based Anode Catalysis for Formic Acid Fuel Cell

Uwitonze¹,

Chen²

2017

Chem Sci J

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Detailed investigation of HCOOH electro-oxidation started about five decades ago, with the advent of modern potentiodynamic techniques, driven initially by the purpose of elucidating some of the most interesting and challenging electrode kinetic problems. Many pioneering works that withstood the test of time and the continuous sophistication of surface electrochemistry techniques were published in the 1960s. Stimulated results were obtained, such as: (i) phenomenological interpretation of anodic polarization curves (e.g., Determination of Tafel parameters), HCOOH oxidation on Pd and Pt catalysts; (ii) discovery of the catalytic effect with respect to Pt and Pd for HCCOH oxidation; (iii) investigation of the potential dependent adsorption of HCOOH on Pt and Pd catalysts which are accompanied by a dual pathway mechanism and (iv) formic acid concentration, temperature effects and crossover of nafion membrane.

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Substrate Engineering toward Selective Growth of Ultrathin WC Crystals and Heterostructures via Liquid Cu‐Zn Catalyst

Li,

Zhang,

et al. 2024

Adv Funct Materials

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Transition metal carbides (TMCs) grown by chemical vapor deposition (CVD) offer promise for numerous novel phenomena and applications in the 2D limit. Despite considerable efforts thus far, the flexible customization of TMCs and their heterostructures still remains challenging. Herein, a substrate engineering is developed to achieve customized manufacturing of ultrathin WC single crystals and WC/graphene (WC‐G) heterostructures by varying the concentration of Zn in Cu‐Zn alloy substrate. It is worth noting that Zn atoms can remarkably reduce the nucleation density of graphene and promote the nucleation of WC. Thus, an increasing Zn content is applied to synergistically modulate the growth of graphene and WC, enabling the controllable fabrication of WC and WC‐G heterostructures. The synthesized WC crystals exhibit an ultrathin nature down to 3 nm, as well as high crystalline, ultra‐clean surface, and superb chemical stability. Based on that, the typical metallic properties with a temperature‐dependent resistance (nearly 1.30 Ω at 300 K and nearly 0.08 Ω at 1.7 K) and low resistance as well as excellent nonlinear optical performance of WC are demonstrated. This work provides fresh insights into regulating the growth behavior of multiblock‐structured carbides and promotes the study of their optic and electronic properties.

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Graphene-supported small tungsten carbide nanocrystals promoting a Pd catalyst towards formic acid oxidation

Cited by 39 publications

References 61 publications

Unravelling the promoting effect of the ultrathin TaC/RGO nanosheet hybrid for enhanced catalytic activity of Pd nanoparticles

Unravelling the promoting effect of the ultrathin TaC/RGO nanosheet hybrid for enhanced catalytic activity of Pd nanoparticles

The Study of Pt and Pd based Anode Catalysis for Formic Acid Fuel Cell

Substrate Engineering toward Selective Growth of Ultrathin WC Crystals and Heterostructures via Liquid Cu‐Zn Catalyst

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