· 논문명 : A Bifunctional Electrocatalyst Derived by High-Temperature Pyrolysis of 3-Amino -1,2,4-Triazole Modified 

               Fe-ZIF Nanostructures for Oxygen Reduction and Evolution Reactions

· 저   자 : Duc-Viet Nguyen, Ravi Nivetha, Nam Le, Jin Suk Chung, Won Mook Choi, Seung Hyun Hur*

· 게재지 : ACS Applied Nano Materials (2024, 7, 1815-1824)

· 초록

Recently, the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) have received great attention for the development

of renewable energy and energy storage systems. In the context of catalyst standpoint, developing single-atom catalysts (SACs) with

bifunctional electrocatalytic reactions (ORR/OER) has emerged as a fascinating research field in recent years. However, a majority of 

SACs that have been reported have a complicated synthesis route that involves many steps and harmful solvents and suffer from 

aggregation phenomena, which makes them unsustainable for industrial use. Herein, a bifunctional C-Atz-20 electrocatalyst was 

fabricated by inserting a secondary organic linker, 3-amino-1,2,4-triazole (Atz), into Fe-ZIF followed by hightemperature pyrolysis and

its ORR/OER elucidated. To fully comprehend the function of Atz addition, the nanostructured materials underwent an extensive 

characteristic analysis. The results showed that the C-Atz-20 exhibited better long-term ORR and OER stability tests when compared

with Pt/C and RuO2, respectively. Interestingly, the high ORR activity of C-Atz-20 originally contributed to the presence of a large

fraction of pyridinic and graphitic N. Rotating ring-disk electrode (RRDE) measurement illustrates the ORR mechanism in the catalytic 

process, giving a better understanding of electron transport, thus paving the way for the design and development of heterogeneous 

catalysts with simple preparation and operating procedures.