黄小青教授在 Adv. Mater. 上发表研究论文

A General Strategy to Glassy M-Te (M = Ru, Rh, Ir) Porous  Nanorods for Efficient Electrochemical N2  Fixation

Juan Wang1#, Bolong Huang2#, Yujin Ji3#, Mingzi Sun2, Tong Wu2, Rongguan Yin1, Xing Zhu4, Youyong Li3, Qi Shao1, and Xiaoqing Huang1*(黄小青)

  

1College of Chemistry Chemical Engineering and Materials Science,Soochow University,Suzhou, Jiangsu 215123, P. R. China

2Department of Applied Biology and Chemical Technology ,The Hong Kong Polytechnic University,Hung Hom, Kowloon, Hong Kong SAR, China

3Institute of Functional Nano & Soft Materials (FUNSOM),Soochow University,Suzhou, Jiangsu 215123, P. R. China

4Testing & Analysis Center,Soochow University,Suzhou, Jiangsu 215123, P. R. China

#J.W., B.H., and Y.J. contributed equally to this work

  

Adv. Mater. 2020, 32, 1907112

  

Electrochemical conversion of nitrogen (N2) into valueadded ammonia (NH3) is highly desirable yet formidably challenging due to the extreme inertness of the N2 molecule, which makes the development of a robust electrocatalyst prerequisite. Herein, a new class of bulletlike MTe (M = Ru, Rh, Ir) glassy porous nanorods (PNRs) is reported as excellent electrocatalysts for N2 reduction reaction (NRR). The optimized IrTe4 PNRs present superior activity with the highest NH3 yield rate (51.1 µg h−1 mg−1cat.) and Faraday efficiency (15.3%), as well as longterm stability of up to 20 consecutive cycles, making them among the most active NRR electrocatalysts reported to date. Both the N2 temperatureprogrammed desorption and valence band Xray photoelectron spectroscopy data show that the strong chemical adsorption of N2 is the key for enhancing the NRR and suppressing the hydrogen evolution reaction of IrTe4 PNRs. Density functional theory calculations comprehensively identify that the superior adsorption strength of IrTe4 adsorptions originates from the synergistic collaboration between electronrich Ir and the highly electroactive surrounding Te atoms. The optimal adsorption of both N2 and H2O in alkaline media guarantees the superior consecutive NRR process. This work opens a new avenue for designing highperformance NRR electrocatalysts based on glassy materials.

  

  

链接:https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201907112