CHEMICAL SCIENCE

Chemical bond conversion directly drives the graphite alkyne material surface to generate electricity


Recently, Associate Professor Chen Nan of the School of Chemistry and Chemical Engineering of Beijing Institute of Technology and Academician Li Yuliang of the Institute of Chemistry of the Chinese Academy of Sciences proposed and verified the generation mechanism of electron transfer between small molecules induced by graphyne (GDY) and chemical bond conversion (olene conversion).

On July 14, 2022, this important research result was published in the journal Matter under the title “Chemical bond conversion directly drives power generation on the surface of graphdiyne.” The first/corresponding author of the article is Associate Professor Chen Nan, and the first unit is Beijing Institute of Technology.

Materials are the material foundation and precursor of human civilization, the tools for human beings to understand and transform nature, and the driving force for directly promoting social development. The development and application of materials is an important milestone in the civilization and progress of human society. The transformation of materials has always been of great interest to scientists, especially some new concepts, phenomena and scientific discoveries.

Figure 1: Preparation and device characteristics of GDY films. (a-d) Characterization of GDY films. (e-g) Composition of the GDY thin film device. (h) Schematic diagram of the structure of H2O molecules through the GDY frame.

Recently, Associate Professor Chen Nan of the School of Chemistry and Chemical Engineering of Beijing Institute of Technology and Academician Li Yuliang of the Institute of Chemistry of the Chinese Academy of Sciences cooperated in the field of graphyne (GDY) materials research, and achieved an original result. The researchers proposed and validated the mechanism by which electron transfers between small molecules induced by GDY and chemical bonding (alkenyne conversion, acetylenic-alkenic conversion) are generated.

When gaseous H2O molecules pass through the GDY framework structure through directional diffusion, electronic transfer occurs between the alkyne bond and GDY to generate an inductive electrical signal. This electrical signal has a voltage of 32 mV and a current density of 203 nA·cm2. In addition, the relative humidity and temperature of the gaseous H2O molecules that make up the moisture and the type of gas also affect the inductive electrical signal output. Unlike previously reported methods of obtaining energy from complex environments such as solar, triboelectric, and piezoelectric, this power generation technology leverages GDY’s unique chemical bond conversion and directly obtains inductive electricity, converting the huge amounts of energy stored around it into electrical energy. This unique electrical phenomenon, which stems from chemical bonding, provides an untapped area for new energy research and helps us better understand the nature of power generation.

Figure 2: (a-d) The core structure of the GDY thin-film power generation device, the generation of regular pulsed electrical signals, and the influencing factors. (e-h) Schematic diagram of the mechanism of electron transfer and alkyne conversion caused by GDY structural fragments and H2O molecule coordination and related theoretical calculations. (i-l) Effects of temperature and molecular species on the generation signal.

The discovery of the phenomenon of electricity production with special molecular structure and chemical bonds in GDY has opened up a new direction for the development of energy morphological changes and promoted the development and practice of new energy sources. In addition, induction electricity has the potential to be used in the future as energy conversion and energy storage, as well as for the rapid detection and identification of certain small molecules in specific systems.

This work has been funded by the National Natural Science Foundation of China (21790050, 21671020), the Beijing Natural Science Foundation of China (2222075), and the Special Program of Innovative Talents science and technology funding of Beijing Institute of Technology (Young Top Talents 2021CX01017). (Source: Science Network)

Related paper information:https://doi.org/10.1016/j.matt.2022.06.045



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