Integration of Marigold 3D flower-like Ni-MOF self-assembled on MWCNTs via microwave irradiation for high-performance electrocatalytic alcohol oxidation and oxygen evolution reactions

IF 21.1 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2021-05-15 DOI:10.1016/j.apcatb.2020.119793

T.V.M. Sreekanth , G.R. Dillip , P.C. Nagajyothi , K. Yoo , J. Kim

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引用次数: 55

Abstract

Fabrication of metal-organic frameworks (MOFs) on carbon nanostructure arrays is extremely challenging. Here, we successfully fabricated three-dimensional (3D) flower-like Ni-MOFs on multiwalled carbon nanotubes (MWCNTs) through a highly efficient and rapid microwave synthetic protocol and studied their applicability in electrocatalytic alcohol oxidation reaction (AOR) and oxygen evolution reaction (OER). Morphological studies using scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) images suggested the formation of marigold-like Ni-MOF decorated on the MWCNTs. Surface coverage of Ni-MOF@CNT (1.11 × 10⁻⁷ mol g^-1) was higher than that of the pristine Ni-MOF (9.35 × 10^-8 mol g^-1) electrocatalyst. The higher electrochemical active surface area (ECSA) of Ni-MOF@CNT (494.3 cm²) compared to the pristine Ni-MOF (203.5 cm²) electrocatalyst resulted in the availability of large active sites in the Ni-MOF@CNT to catalyze AOR and OER. Ni-MOF@CNT exhibited a higher electrooxidation performance in AOR than the pristine Ni-MOF and its OER activity was far superior.

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微波辐照在MWCNTs上自组装的万金菊三维花状Ni-MOF集成用于高性能电催化醇氧化和析氧反应

在碳纳米结构阵列上制备金属有机骨架(MOFs)是一项极具挑战性的研究。本研究通过高效、快速的微波合成方案，在多壁碳纳米管(MWCNTs)上成功制备了三维花状ni - mof，并研究了其在电催化醇氧化反应(AOR)和析氧反应(OER)中的适用性。通过扫描电子显微镜(SEM)和高分辨率透射电子显微镜(HR-TEM)图像的形态学研究表明，在MWCNTs上形成了金盏花状的Ni-MOF。Ni-MOF@CNT电催化剂的表面覆盖率(1.11 × 10−7 mol g-1)高于原始Ni-MOF电催化剂(9.35 × 10-8 mol g-1)。与原始Ni-MOF (203.5 cm2)电催化剂相比，Ni-MOF@CNT (494.3 cm2)的电化学活性表面积(ECSA)更高，导致Ni-MOF@CNT中有大的活性位点可用于催化AOR和OER。Ni-MOF@CNT在AOR中表现出比原始Ni-MOF更高的电氧化性能，其OER活性远远优于原始Ni-MOF。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.