Yang Ziyin, Tian Zhigao, Qi Chengcheng
School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong Province, People's Republic of China.
Mikrochim Acta. 2024 Aug 14;191(9):536. doi: 10.1007/s00604-024-06609-5.
For the first time potassium single-atoms (K SA) are explored as the sensing material to boost electrochemical sensing of hydrogen peroxide (HO). The N-doped carbon material with a three-dimensional porous structure (3D NG) was prepared using NaCl as the template, and K SA were anchored to the surface of 3D NG through high-temperature pyrolysis. The structure of K SA/3D NG was characterized by TEM, HAADF-STEM, XPS, and XRD. The results of electrochemical studies indicate that K SA play a crucial role in promoting the electrocatalytic reduction of HO, which not only optimized the adsorption strength for HO but also improved the electron transfer rate, therefore improving the sensitivity for detecting HO. This study demonstrates the excellent electrocatalytic activity of K SA, which provides a promising sensing material for the detection of HO and lays the foundation for the application of alkali metal single-atoms in the field of electrochemical sensing.
首次探索将钾单原子（K SA）作为传感材料以增强对过氧化氢（HO）的电化学传感。以NaCl为模板制备了具有三维多孔结构的氮掺杂碳材料（3D NG），并通过高温热解将K SA锚定在3D NG的表面。采用透射电子显微镜（TEM）、高角度环形暗场扫描透射电子显微镜（HAADF-STEM）、X射线光电子能谱（XPS）和X射线衍射（XRD）对K SA/3D NG的结构进行了表征。电化学研究结果表明，K SA在促进HO的电催化还原中起着关键作用，这不仅优化了对HO的吸附强度，还提高了电子转移速率，从而提高了检测HO的灵敏度。本研究证明了K SA具有优异的电催化活性，为HO的检测提供了一种有前景的传感材料，并为碱金属单原子在电化学传感领域的应用奠定了基础。
