Improved oxygen activation over metal-organic-frameworks derived and zinc-modulated Co@NC catalyst for boosting indoor gaseous formaldehyde oxidation at room temperature.

Journal of Colloid and Interface Science
Meng HuangRuilin Wang

Abstract

The indoor low-concentration formaldehyde (HCHO) removal in cobalt-based catalysts is still a "hot potato". In this work, metal-organic-frameworks (MOF)-derived and Zinc (Zn)-modulated new cobalt nanoparticles catalyst (CZ-Co@NC-800) was designed and prepared. The CZ-Co@NC-800 performed outstanding elimination activities for ~1 ppm HCHO at 25 °C. In the static test condition, it achieves complete HCHO removal in 3 h at a relative humidity (RH) of ~55%. Moreover, 90.18% HCHO removal ratio is held after five recycle tests. In the dynamic test condition, it remains the characteristic to eliminate around 95.89% of HCHO within 8 h under an RH of ~55% and a gas hourly space velocity (GHSV) of ~150,000 mL·h-1g-1. Such advanced results should be ascribed to large specific surface area bringing about more cobalt active sites; and it is also because residual Zn metal affects the electronic structure of CZ-Co@NC-800 and enhance the surface charge transfer rate, thus the activation and dissociation ability of oxygen is promoted. Besides, a short HCHO reaction path over CZ-Co@NC-800 which was clarified by the In situ DRIFTs is also a reason for excellent catalytic performance. This work represents a crucial addition to expand the family of ...Continue Reading

References

Jan 21, 2010·Nano Letters·Mildred S DresselhausRiichiro Saito
Oct 28, 2011·Nanoscale Research Letters·Sahng-Kyoon JerngSeung-Hyun Chun
Feb 2, 2018·ACS Applied Materials & Interfaces·Jianping ShengYou-Nian Liu

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