Porous heterostructure of h-BN/carbon as an efficient electrocatalyst for hydrogen peroxide generation

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-03-28 DOI:10.1007/s42823-024-00718-0

Xiang Xu, Yuying Zhao, Qixin Yuan, Yuhan Wu, Jiawei He, Mengmeng Fan

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引用次数: 0

Abstract

We successfully synthesized a porous carbon material with abundant hexagonal boron nitride (h-BN) dispersed on a carbon matrix (p-BN-C) as efficient electrocatalysts for two-electron oxygen reduction reaction (2e⁻ ORR) to produce hydrogen peroxide (H₂O₂). This catalyst was fabricated via ball-milling-assisted h-BN exfoliation and subsequent growth of carbon structure. In alkaline solutions, the h-BN/carbon heterostructure exhibited superior electrocatalytic activity for H₂O₂ generation measured by a rotating ring-disk electrode (RRDE), with a remarkable selectivity of up to 90–97% in the potential range of 0.3–0.6 V vs reversible hydrogen electrode (RHE), superior to most of the reported carbon-based electrocatalysts. Density functional theory (DFT) simulations indicated that the B atoms at the h-BN heterostructure interface were crucial active sites. These results underscore the remarkable catalytic activity of heterostructure and provide a novel approach for tailoring carbon-based catalysts, enhancing the selectivity and activity in the production of H₂O₂ through heterostructure engineering.

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h-BN/carbon 多孔异质结构作为生成过氧化氢的高效电催化剂

我们成功合成了一种多孔碳材料，其碳基体上分散有大量的六方氮化硼（h-BN）（p-BN-C），可作为双电子氧还原反应（2e- ORR）产生过氧化氢（H2O2）的高效电催化剂。这种催化剂是通过球磨辅助 h-BN 剥离和随后的碳结构生长制成的。在碱性溶液中，通过旋转环盘电极（RRDE）测量，h-BN/碳异质结构在生成 H2O2 方面表现出卓越的电催化活性，在 0.3-0.6 V 电位范围内与可逆氢电极（RHE）相比，选择性高达 90-97%，优于大多数已报道的碳基电催化剂。密度泛函理论（DFT）模拟表明，h-BN 异质结构界面上的 B 原子是关键的活性位点。这些结果强调了异质结构的显著催化活性，并为定制碳基催化剂提供了一种新方法，通过异质结构工程提高了 H2O2 生产的选择性和活性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.