[ACIE] 我室黄小青教授发表论文:Large‐Scalable Interfacial Synthesis of Two‐Dimensional Metal‐Organic Framework Nanosheets for Electrochemical Hydrogen Peroxide Production

发布日期:2021年03月22日   浏览次数:

我室黄小青教授在 ACIE 上发表论文:Large‐Scalable Interfacial Synthesis of Two‐Dimensional Metal‐Organic Framework Nanosheets for Electrochemical Hydrogen Peroxide Production

摘要:Two‐dimensional (2D) metal‐organic framework nanosheets (MOF NSs) play a vital role in catalysis, but the most preparation method is through ultrasonication or solvothermal, which is however difficult to implement the large‐scalable production of MOFs with modulated active sites. Herein, a liquid‐liquid interfacial synthesis method has been developed for the large‐scalable fabrication of a series of 2D Ni MOF NSs. We demonstrated that the active sites could be modulated by readily tuning the ratios of metal precursors and organic linkers (R M/L ). Interestingly, the Ni MOF NSs display highly R M/L dependent activities towards 2e oxygen reduction reaction (ORR) to hydrogen peroxide (H 2 O 2 ), where the Ni MOF NSs with the R M/L of 6 exhibit the optimal near‐zero overpotential, ~98% H 2 O 2 selectivity and production rate of ~80 mmol g cat ‐1 h ‐1 in 0.1 M KOH, making them promising electrocatalysts for H 2 O 2 synthesis. As evidenced by x‐ray absorption fine structure spectroscopy, the coordination environment of active sites changed from saturation to unsaturation, and the partially unsaturated metal atoms are crucial to create optimal sites for enhancing the electrocatalysis.

文章链接:https://onlinelibrary.wiley.com/doi/10.1002/anie.202100897