A novel two-dimensional MgO-h-BN nanomaterial supported Pd catalyst for CO oxidation reaction

Li, Lingcong; Liu, Xiaojun; He, Hong; Zhang, Ningqiang; Liu, Ziwen; Zhang, Guizhen

doi:10.1016/j.cattod.2018.07.025

Cited by 18 publications

(13 citation statements)

References 51 publications

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“…This dominating peak can be assigned to sp 2 BN bond in h ‐BN. [ 36 ] In contrast, the fitted peaks of the N 1s core level spectrum (Figure 1d) reveal a prominent peak at 398.05 eV and a weak shoulder peak at 398.54 eV. Beside the lower binding energy sp 2 BN bond in h ‐BN, [ 36 ] the higher binding energy side peak originates from the CN bonding.…”

Section: Resultsmentioning

confidence: 99%

“…[ 36 ] In contrast, the fitted peaks of the N 1s core level spectrum (Figure 1d) reveal a prominent peak at 398.05 eV and a weak shoulder peak at 398.54 eV. Beside the lower binding energy sp 2 BN bond in h ‐BN, [ 36 ] the higher binding energy side peak originates from the CN bonding. [ 37 ] For the C 1s core level spectrum, the main peak at 284 eV is attributed to the sp 2 CC bonds.…”

Section: Resultsmentioning

confidence: 99%

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Direct Growth of Hexagonal Boron Nitride Thick Films on Dielectric Substrates by Ion Beam Assisted Deposition for Deep‐UV Photodetectors

Gao

Sun

et al. 2021

Advanced Optical Materials

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High quality hexagonal boron nitride (h‐BN) thick films are indispensable for practical deep‐ultraviolet (DUV) photodetector applications. However, the controllable synthesis of h‐BN films in terms of thickness and crystallinity often requires high growth temperatures, tedious chemical precursors and, catalytic transition metal substrates, that will eventually hinder their applicability. In this work, the direct growth of h‐BN films with thickness of 50–500 nm on silicon(100), sapphire, and quartz substrates by ion beam assisted deposition at a lower temperature (≈500 °C) without employing extra catalysis is reported. The as‐synthesized h‐BN thick films are stoichiometric, smooth, and continuous without obvious pinholes and cracks, consisting of nanocrystalline domains on the dielectric substrates, distinct from those grown on metallic substrates. More intriguingly, the DUV photodetector fabricated from a 500 nm thick h‐BN film on quartz substrate exhibits high peak responsivity (0.5 A W−1) with a ultrahigh on/off ratio of >103 at 204 nm, a high rejection ratio (R204nm/R250nm > 103), a large specific detectivity (6.92 × 109 Jones), and a sharp cutoff wavelength at 218 nm. The work herein demonstrates the great potential of this form of h‐BN thick films toward the development of DUV photodetectors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Direct Growth of Hexagonal Boron Nitride Thick Films on Dielectric Substrates by Ion Beam Assisted Deposition for Deep‐UV Photodetectors

Gao

Sun

et al. 2021

Advanced Optical Materials

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“…These three characterization methods could be considered as "three treasures" to determine whether a catalyst is a SAC. The adsorption and activation of O2 molecules are generally accepted as rate-limited steps due to serious competitive adsorption between CO and O2, as well as the strong adsorption ability of CO toward O2 which hinders the O2 adsorption and activation over traditional supported PGMs catalysts (Langmuir-Hinshelwood mechanism: L-H) [15,86,87]. However, density-functional theory (DFT) calculations illustrated a much lower adsorption energy of CO on isolated Pt sites with high-valence (1.96 eV) than on Pt10 clusters sites (3.05 eV) over FeOx support.…”

Section: Catalytic Oxidation Of Comentioning

confidence: 99%

Single-atom site catalysts for environmental catalysis

et al. 2020

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In recent decades, the environmental protection and long-term sustainability have become the focus of attention due to the increasing pollution generated by the intense industrialization. To overcome these issues, environmental catalysis has increasingly been used to solve the negative impact of pollutants emission on the global environment and human health. Supported platinum-metal-group (PGM) materials are commonly utilized as the state-of-the-art catalysts to eliminate gaseous pollutants but large quantities of PGMs are required. By comparison, single-atom site catalysts (SACs) have attracted much attention in catalysis owing to their 100% atom efficiency and unique catalytic performances towards various reactions. Over the past decade, we have witnessed burgeoning interests of SACs in heterogeneous catalysis. However, to the best of our knowledge, the systematic summary and analysis of SACs in catalytic elimination of environmental pollutants has not yet been reported. In this paper, we summarize and discuss the environmental catalysis applications of SACs. Particular focus was paid to automotive and stationary emission control, including model reaction (CO oxidation, NO reduction and hydrocarbon oxidation), overall reaction (three-way catalytic and diesel oxidation reaction), elimination of volatile organic compounds (formaldehyde, benzene, and toluene), and removal/decomposition of other pollutants (Hg 0 and SO 3). Perspectives related to further challenges, directions and design strategies of single-atom site catalysts in environmental catalysis were also provided.

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“…Hexagonal boron nitride (h-BN) is a graphite analogue material with excellent high-temperature chemical stability, low density, high permeability, and superb oxidation resistance. , In recent years, h-BN has drawn increased attention of scientists in the research area of catalysis. − h-BN both itself and as a support carrier for catalysis has been studied. The bright future of h-BN in catalysis lies not only in its superior stability but also in its possible unique role in catalysis.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic AuPd Nanoparticles Loaded on Amine-Functionalized Porous Boron Nitride Nanofibers for Catalytic Dehydrogenation of Formic Acid

Guo

Lin

et al. 2021

ACS Appl. Nano Mater.

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Formic acid (FA) has been considered as a promising hydrogen energy carrier due to its nontoxicity, high energy density, easy storage/transport, etc. However, the development of decent FA dehydrogenation catalysts with high selectivity, good catalytic activity, and excellent cycling performance remains a challenge. Herein, a highly stable heterogeneous catalyst using porous boron nitride nanofibers (BNNFs) as carriers has been developed for catalytic FA dehydrogenation. Taking the advantage of porous BNNFs with characteristics of high porosity and rich in surface defects and functional groups, amine groups are successfully introduced onto BNNFs (named BNNFs-A), which play an important role in synergistic catalysis reactions. Without using any additives, the prepared Au 1 Pd 3 /BNNFs-A catalytic FA dehydrogenation possesses superior catalytic activity with an initial turnover frequency (TOF) value of 1181.1 h −1 and an activation energy of 20.1 kJ mol −1 . Comparative investigations and theoretical studies indicate that the excellent performance of Au 1 Pd 3 /BNNFs-A derives from the small particle sizes and high dispersion of Au 1 Pd 3 nanoparticles on BNNFs, the modified Pd electronic structure in the Au 1 Pd 3 /BNNFs-A composite, and the synergistic effect of the modified BN surfaces. The findings of this study should provide valuable ideas for the design of BN-based catalysts.

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A novel two-dimensional MgO-h-BN nanomaterial supported Pd catalyst for CO oxidation reaction

Cited by 18 publications

References 51 publications

Direct Growth of Hexagonal Boron Nitride Thick Films on Dielectric Substrates by Ion Beam Assisted Deposition for Deep‐UV Photodetectors

Direct Growth of Hexagonal Boron Nitride Thick Films on Dielectric Substrates by Ion Beam Assisted Deposition for Deep‐UV Photodetectors

Single-atom site catalysts for environmental catalysis

Bimetallic AuPd Nanoparticles Loaded on Amine-Functionalized Porous Boron Nitride Nanofibers for Catalytic Dehydrogenation of Formic Acid

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