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Chromium oxide nanoparticles in-situ immobilized onto nitrogen-doped carbon plates with boosted catalytic activity toward nitrogen reduction reaction

Canadian Journal of Chemical Engineering, ISSN: 1939-019X
2024
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Article Description

A chromium oxide-based nanocomposite (CrO@NC) is designed and prepared via a simple pyrolysis route with Cr-based metal organic framework (MOF) as a template. The research results indicate that CrO nanoparticles have an average size of ~70 nm and are in situ formed and imbedded onto the Cr-based MOF-derived 2D N-doped carbon microplates. When employed as an inexpensive electrocatalyst for nitrogen reduction reaction (NRR) to synthesize ammonia, CrO@NC demonstrates an improved and stable catalytic activity in comparison with bare CrO. A large ammonia production rate of 29.42 μg mg h under a lower potential of −0.4 V versus reversible hydrogen electrode (RHE) can be acquired with a Faradic efficiency of 9.89% in sodium sulphate solution. Additionally, a satisfactory selectivity can also be achieved without hydrazine byproduct. The greatly promoted catalytic activity of CrO@NC is regarded to be concerned with its desirable structures such as 2D planar topological structure with expanded active surface area, abundant catalytic sites, and effective combination with conductive carbon.

Bibliographic Details

Jing Wang; Chenbo Tang; Hui Liufu; Xia Zeng; Ziyi Huang; Lin Ma; Hanjia Li; Yajie Chen; Jinyi Sun

Wiley

Chemical Engineering

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