A kind of porous concave cube conp@cosa-n-c catalyst and its preparation method and application

A technology of cube and catalyst, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of Fe-N-C catalyst performance decline, catalyst durability decline, etc., and achieve the effect of improving density, strong durability, and large external surface area.
CN112886030BActive Publication Date: 2022-01-11XIAMEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAMEN UNIV
Publication Date
2022-01-11

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Abstract

The invention discloses a porous concave cubic CoNP@CoSA-N-C catalyst and its preparation method and application. The invention firstly prepares a ZnCo-ZIF cube with a size of about 200-400nm, and then wraps the ZnCo-ZIF cube on the surface of the cube. Covered with mesoporous silica coating to prepare ZnCo‑ZIF@mSiO 2 nanocubes; calcined at 700‑1000 °C in an inert gas environment, and then the silica layer was etched away to form porous concave cubic Co single-atom catalysts (Co SA ‑N‑C). In the second step, the organometallic gaseous sublimation doping method is used to increase the metal content, and the Co SA On the ‑N‑C carbon substrate, cobalt acetylacetonate is first evaporated at low temperature, then captured, then reduced at high temperature and stabilized on Co SA ‑N‑C carbon matrix, and finally synthesized a high-content Co metal catalyst. Simultaneous generation of highly active Co nanoparticles and Co‑N 4 Composite site (Co NP @Co SA ‑N‑C). The invention greatly improves the activity of the catalyst.
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Description

technical field

[0001] The invention belongs to the technical field of nanometer catalytic materials, and in particular relates to a preparation method and application of porous concave cube-loaded Co metal particles and Co-N4 composite site carbon-based catalysts. Background technique

[0002] Efficient and environmentally friendly proton exchange membrane fuel cells (PEMFCs) have been promoted as one of the most promising clean and sustainable energy conversion technologies. Currently, one of the most serious challenges in its successful initial commercialization is the development of highly active and stable long-lasting oxygen reduction reaction (ORR) electrocatalysts to overcome the inherent sluggish reaction kinetics of ORR at the cathode. Platinum group metal (PGM) catalysts are widely used as the best ORR catalysts. Unfortunately, the high cost, scarcity, and poor durability of Pt pose a major obstacle to the large-scale application of PEMFCs. In the past few years...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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