Solid catalysis is the cornerstone of the chemical industry and is also the core technology for energy conversion, environmental purification and clean synthesis. The creation of advanced catalytic materials is the golden key to unlocking the energy and environmental issues.

Dr. Zhao Zhongkui, associate professor and doctoral tutor of Dalian University of Technology, led the “Advanced Catalytic Materials” research group under the support of a number of National Natural Science Fund Projects, the Liaoning Provincial Fund Project, the Ministry of Education’s New Century Talent Support Program, and corporate cooperation projects. Focusing on the outstanding problems faced by energy sources and the environment, the rational design, controllable construction and nano-microstructure and surface interface control of nano-catalyst materials have been carried out. Some breakthroughs have been made in the areas of catalytic new materials and catalytic chemistry, fine chemical catalysis, energy and environmental catalysis.

Compared to metal catalysts, inorganic non-metallic carbonaceous catalysts have many advantages such as low cost, environmental friendliness, no heavy metal pollution, corrosion resistance, etc., and are thus attracting attention in terms of clean chemical preparation, green energy conversion and storage, and environmental purification.

“Development of nanocarbon-catalyzed direct dehydrogenation of ethylbenzene and lower alkanes to olefins, and photocatalytic photocatalytic water for hydrogen production, organic pollutant degradation, etc. The researchers built a new type of highly efficient non-metallic carbon catalyst. Simple and effective methods for controlling the microstructure and surface chemical properties of carbon materials have enabled synchronous surface structure defect generation and heteroatom doping modification, etc., said Zhao Zhongkui.

For example, the fine chemical industry has many steps and heavy pollution, and the greening of fine chemicals is crucial. “The research team carried out research on the clean preparation of fine chemicals and achieved good progress through the regulation of the microstructure and surface chemistry of the catalyst.” Zhao Zhongkui said that researchers have achieved high efficiency in cleaning reaction solvents and other fine chemicals and intermediates. Clean synthesis.

Hydrogen is an important new energy source. Syngas is the central product for the efficient and clean utilization of natural gas and coal.

The researchers carried out research on hydrogen preparation, purification, and syngas catalytic conversion. Through the research of hydrogen production from methane reforming and synthesis gas, and hydrogen production from photolysis of water, the preferential oxidation of CO in hydrogen-rich gas and the catalytic conversion of olefins and oxygenates by syngas were studied.

“The study of nano-cobalt-based catalysts has significantly reduced the initial temperature of complete CO conversion and effectively expanded the temperature window of complete conversion; through the research of new nickel-based catalysts, it has improved its catalytic activity and stability,” said Zhao Zhongkui.

Photocatalytic energy conversion is one of the hot spots in the field of environmental purification catalysis. Researchers are working on the construction of nanoheterojunctions and the study of their geometric structures, electronic structures, optical properties, and photocatalytic properties.

"The formation and regulation of nanoheterojunctions to regulate the energy band and electrons of semiconductors - hole recombination properties, light absorption efficiency, carrier migration efficiency, and accessibility of catalyst active sites, thereby regulating their photocatalytic properties , trying to build a new and efficient energy conversion, environmental purification with a photocatalyst." Zhao Zhongkui said.

Currently, researchers have created alkyl-methylnaphthalene sulfonate series surfactants, and indoor flooding tests have shown that the recovery rate can be increased by 20% and alkali-free flooding can be achieved. In addition, high-performance lignosulfonate domestic dye dispersants have also been developed. The dispersant has the characteristics of low cost and high thermal stability, and is expected to replace the imported Reax-85A to achieve localization of high-quality dye dispersants. (Reporter Ma Aiping)

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