Professor Zhang Shiguo's research group from Hunan University has made a series of progress in the field of carbon-based electrocatalytic materials

The adjustment of the energy structure driven by "carbon neutrality" and the governance of CO2 require the development of efficient and sustainable CO2 conversion technologies
.
Recently, Professor Zhang Shiguo's group from the School of Materials Science and Engineering of Hunan University has made a series of progress in the field of carbon-based electrocatalytic materials.
The related results have been published in the internationally renowned journals "ACS Catalysis" and "Applied Catalysis B: Environmental"
.
? Screenshots of ACS Catalysis results published
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? The research team used the indirect capture method and used the C2F2 generated by the decomposition of PTFE to form Sn-F bonds, control the defect sites of the carbon substrate and the etching of nitrogen atoms, and prepared a non-nitrogen with a coordination structure of Sn-C2O2F Coordinating atomic-level Sn modified carbon materials (FNC-SnOF)
.
Different from the traditional Sn-N4 site of formic acid-based CO2 reduction products, FNC-SnOF achieves more than 90% CO selectivity in the range of -0.
20 to -0.
60 V (vs RHE), and the highest current density is 186 mA cm- 2
.
? The structure identification, CO2RR performance and theoretical calculation of non-nitrogen coordination atomic-level Sn
.
? Related work was published in the internationally renowned journal "ACS Catalysis" (IF=12.
35), providing new research ideas for the design of carbon-based electrocatalytic materials
.
The first authors of the paper are assistant professors Ni Wenpeng and Gao Yang, and the corresponding authors are Professor Zhang Shiguo.
? Applied Catalysis B: Environmental results published screenshots
.
? In addition, how to construct a carbon-based homogeneous atomic level two-site catalyst is also a challenge
.
Based on this, Professor Zhang Shiguo’s research group used the different interactions between the pyridine nitrogen in the CoN3 site-modified nitrogen-doped carbon material and the CoN3 site and the supported molecular catalyst cobalt phthalocyanine to construct an atomic-level cobalt-modified two-site Point catalysts (CoN3-CoPc and Pyri-CoPc)
.
Theoretical calculation and electrochemical analysis show that Pyri-CoPc has the lowest CO2RR overpotential, while CoN3-CoPc has the best HER activity, thus forming dual active sites to catalyze CO2RR and HER respectively
.
The catalyst realizes the preparation of synthesis gas with a wide range of H2/CO ratio.
The current density of synthesis gas generated in 1.
0 M KHCO3 and KOH in the flow cell reaches 600 and 880 mA cm-2, respectively, which meets the current density required by industry.

.
? Design of atomic-grade cobalt dual-site catalyst and its CO2RR electrocatalytic performance
.
This work was published in the internationally renowned journal "Applied Catalysis B: Environmental" (IF=16.
683).
The first authors of the paper are Assistant Professor Ni Wenpeng and Associate Professor Liu Zhixiao, and the corresponding author is Professor Zhang Shiguo
.
? The above-mentioned research is supported by the National Overseas High-level Talents Program Project, the National Natural Science Foundation of China, the Hunan Outstanding Youth Fund, and the independent research and development project of the State Key Laboratory of Advanced Design and Manufacturing of Automobile Body of Hunan University
.