Electrocatalysis of the Oxygen Reduction Reaction and the Formic Acid Oxidation Reaction on BN/Pd Composites Prepared Sonochemically

Zuo, Ling-Xia; Jiang, Liping

doi:10.1149/2.1601712jes

Cited by 7 publications

(12 citation statements)

References 46 publications

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“…Our calculations agree well with a recently published experiment on BN@Pd composites which revealed an ORR activity comparable to that of the commercial Pt/C catalyst. 22 The calculated CO adsorption energies are À0.62 eV and À0.01 eV for h-BN@Cu and h-BN@Pd with B-vac., respectively. These energies are signicantly weaker than the CO adsorption energy on Pt (111), À1.65 eV, indicating less CO poisoning on h-BN@M compared to Pt (111).…”

Section: Resultsmentioning

confidence: 91%

“…28 Zuo et al observed that Pd supported boron nitride retained its ORR activity aer 4000 cycles, while the halfwave potential of commercial Pt/C decreased by 33 mV. 22 These experiments indicate that depositing h-BN on metal supports is a promising technique to enhance the stability of noble metal supports while maintaining the activity.…”

Section: Introductionmentioning

confidence: 99%

“…However, its ORR catalytic activity can be signicantly improved by surfactant exfoliation, hetero-atom or metal doping, and deposition on metal supports. [18][19][20][21][22][23][24][25][26] Gao et al investigated the role of different defects for Cu supported BN and found that a boron vacancy helps in binding ORR intermediates more strongly. 27 On the other hand, h-BN exhibits other unique properties such as high stability which is favorable for the ORR.…”

Section: Introductionmentioning

confidence: 99%

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Noble metal supported hexagonal boron nitride for the oxygen reduction reaction: a DFT study

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Siahrostami

2019

Nanoscale Adv.

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Discovering active, stable and cost-effective catalysts for the oxygen reduction reaction (ORR) is of utmost interest for commercialization of fuel cells. Scarce and expensive noble metals such as Pt and Pd are the state-of-the-art active ORR catalysts but suffer from low stability against CO poisoning. Hexagonal boron nitride (h-BN) is a particularly attractive material due to its low cost and stability; however, it suffers from intrinsic low activity toward the ORR in the pristine form as a result of its inherently low conductivity with a large band gap of $5.5 electron volts. During the past few years, several strategies such as using metal supports, metal doping and atomic vacancies have been reported to significantly increase the conductivity, thereby promoting the ORR activity. Herein we use density functional theory calculations to systematically study these strategies for activating inert h-BN and further examine the stability against CO poisoning. We show that noble metals, such as Ag, Pd, and Pt, require boron (B) or nitrogen (N) vacancies to reasonably activate h-BN toward the ORR. For example, Pd supported h-BN with B-vacancies exhibits significantly high ORR activity. All three examined metal supported h-BNs are predicted to be stable against CO poisoning. These results demonstrate that supporting h-BN on noble metals is a promising strategy to increase the stability against CO poisoning while maintaining high ORR activity. Fig. 1 The optimized geometries of metal supported BN with and without vacancies using a 2(O3 Â O3) supercell (top) for Ag, Pd, and Pt and a (3 Â 3) supercell for Cu (bottom). Blue and pink balls indicate N and B, respectively.This journal is

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Section: Resultsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Noble metal supported hexagonal boron nitride for the oxygen reduction reaction: a DFT study

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Siahrostami

2019

Nanoscale Adv.

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“…Experiments have shown that the ORR catalytic performance of h-BN-Pd materials in the presence of boron vacancies can attain catalytic activities similar to that of commercial Pt/C. [64] Thus, vacancies in ultrathin h-BN materials can enhance the catalytic activity of the substrate.…”

Section: Oxygen Reactionsmentioning

confidence: 99%

Vacancy in Ultrathin 2D Nanomaterials toward Sustainable Energy Application

Bai

Zhai

et al. 2019

Advanced Energy Materials

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The unique physicochemical properties of (2D) nanomaterials make them well‐suited for use in sustainable energy applications. Many of these materials can be further improved with vacancy engineering. This review details recent progress in the vacancy engineering of ultrathin 2D nanomaterials. For clarity, it mainly focuses on various ultrathin 2D materials in three categories: Xa&XaYb‐, MaXb‐, or MaXbYc‐structured materials. Recently developed vacancies in different types of ultrathin 2D materials, as well as their preparation and characterization, are described. Emphasis is placed on the potential electrochemical energy storage and conversion applications of these materials. This review considers the relationship between vacancy properties and material categories of various ultrathin 2D materials in terms of application requirements, preparation, and characterization techniques. The challenges and future outlook of this promising field are summarized.

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“…However, as the design of catalytic nanomaterials with enhanced thermal stability is desired, it is important to focus on emerging catalyst supports such as boron nitride-based materials, which besides possessing extremely high thermal, mechanical, and chemical resistance [ 16 , 17 , 18 , 19 ], have also been recently investigated as hydrogen storage platforms and in nanocatalysis [ 20 , 21 ]. When compared to other support materials such as oxides and carbon, the potential of boron nitride (BN) as an innovative support for selective reactions has been demonstrated, especially for processes requiring high temperatures [ 22 , 23 , 24 , 25 , 26 ], and it has been shown that Pd NPs supported on BN open prospects for many catalytic reactions, such as the hydrogenation of lactose, for example [ 23 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Boron Nitride as a Novel Support for Highly Stable Palladium Nanocatalysts by Atomic Layer Deposition

et al. 2018

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The ability to prepare controllable nanocatalysts is of great interest for many chemical industries. Atomic layer deposition (ALD) is a vapor phase technique enabling the synthesis of conformal thin films and nanoparticles (NPs) on high surface area supports and has become an attractive new route to tailor supported metallic NPs. Virtually all the studies reported, focused on Pd NPs deposited on carbon and oxide surfaces. It is, however, important to focus on emerging catalyst supports such as boron nitride materials, which apart from possessing high thermal and chemical stability, also hold great promises for nanocatalysis applications. Herein, the synthesis of Pd NPs on boron nitride (BN) film substrates is demonstrated entirely by ALD for the first time. X-ray photoelectron spectroscopy indicated that stoichiometric BN formed as the main phase, with a small amount of BNxOy, and that the Pd particles synthesized were metallic. Using extensive transmission electron microscopy analysis, we study the evolution of the highly dispersed NPs as a function of the number of ALD cycles, and the thermal stability of the ALD-prepared Pd/BN catalysts up to 750 °C. The growth and coalescence mechanisms observed are discussed and compared with Pd NPs grown on other surfaces. The results show that the nanostructures of the BN/Pd NPs were relatively stable up to 500 °C. Consequent merging has been observed when annealing the samples at 750 °C, as the NPs’ average diameter increased from 8.3 ± 1.2 nm to 31 ± 4 nm. The results presented open up exciting new opportunities in the field of catalysis.

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Electrocatalysis of the Oxygen Reduction Reaction and the Formic Acid Oxidation Reaction on BN/Pd Composites Prepared Sonochemically

Cited by 7 publications

References 46 publications

Noble metal supported hexagonal boron nitride for the oxygen reduction reaction: a DFT study

Noble metal supported hexagonal boron nitride for the oxygen reduction reaction: a DFT study

Vacancy in Ultrathin 2D Nanomaterials toward Sustainable Energy Application

Boron Nitride as a Novel Support for Highly Stable Palladium Nanocatalysts by Atomic Layer Deposition

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