Monatomic catalytic material NiPc-MPOP for high-efficiency photocatalytic reduction of carbon dioxide and preparation method thereof

Abstract

The invention belongs to the crossing field of porous organic polymer materials and catalytic chemistry, and discloses a novel carbon dioxide reduction photocatalyst and a preparation method thereof. A series of porous organic polymers NiPc-MPOP which simultaneously contain M-N4 and M-N2O2 monatomic sites are designed and prepared. The polymer not only can synergistically improve the catalytic efficiency, but also provides a more direct opportunity to recognize the activity of a metal center. The photo-reduction result of CO2 shows that excellent CO generation capability (7.77 mmol g <-1 >) can be realized by introducing a catalytic center with Ni-N2O2 into an original phthalocyanine-based Ni-N4 framework, and the selectivity of H2 is as high as 96%. In combination with control experiments and theoretical researches, compared with the traditional Ni-N4 part, the Ni-N2O2 part is proved to be a part with higher CO2RR activity. By changing the coordination environment, the more effective monatomic catalyst is designed, and a new thought and theoretical basis are provided for design and synthesis of the efficient monatomic catalyst.

Description

technical field [0001] The invention belongs to the intersection field of porous organic polymer materials and catalytic chemistry, and specifically relates to a novel carbon dioxide reduction photocatalyst and a preparation method thereof. Background technique [0002] The combustion of fossil fuels (oil, coal, and natural gas) is often accompanied by a large amount of greenhouse gas (GHG) emissions, most of which are carbon dioxide (CO 2 ) into the atmosphere. Continued consumption of finite fossil fuels and CO 2 Excessive emissions have led to major problems such as energy shortages and the greenhouse effect. Therefore, utilizing solar energy or renewable electricity to convert CO 2 Conversion to carbon monoxide (CO) and other value-added chemicals (methane, methanol, formic acid, ethanol, etc.) has become a research hotspot in the field of energy catalysis. This strategy not only reduces atmospheric CO 2 content, alleviate the adverse effects of the greenhouse effec...

AI Technical Summary

Problems solved by technology

However, the current preparation of SACs has problems such as cumbersome synthesis process, uncontrollable microenvironment of catalytic sites, and easy deactivation of catalysts.

At the same time, due to the difference in the overall chemical environment, the coordination microenvironment of a single atomic site cannot be fully explored to fully explore its impact on the catalytic performance of SACs.

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