Wang Zhonghao, Jin Bingjun, Zou Guojun, Zhang Kan, Hu Xun, Park Jong Hyeok
National Engineering Research Center for Fine Petrochemical Intermediates, State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.
Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Republic of Korea.
ChemSusChem. 2019 Feb 21;12(4):866-872. doi: 10.1002/cssc.201802495. Epub 2019 Feb 5.
Polymeric carbon nitride has been considered to be an active photocathode for catalyzing the generation of H through water splitting. However, the application of this material in photoelectrochemical cells remains a challenge owing to the intrinsically sluggish kinetics of charge separation. Herein, a facile salt-melt method is developed for fabricating Cu-modified polymeric carbon nitride as an effective photocathode material for solar water splitting. Various characterization data confirm that Cu-modified polymeric carbon nitride contains both free CuCl, derived from precursors, and coordinated Cu species incorporated into the polymeric carbon nitride, which can generate type-II heterojunctions. This special heterojunction energy structure contributes to a significantly enhanced photocurrent density for hydrogen evolution. The proposed strategy for synthesizing the Cu-modified polymeric carbon nitride can stimulate research for the development of highly efficient visible-light-active photocathodes.
聚合氮化碳被认为是一种用于催化通过水分解产生氢气的活性光阴极。然而，由于电荷分离的内在动力学缓慢，这种材料在光电化学电池中的应用仍然是一个挑战。在此，开发了一种简便的盐熔法来制备铜改性的聚合氮化碳，作为用于太阳能水分解的有效光阴极材料。各种表征数据证实，铜改性的聚合氮化碳既包含源自前驱体的游离氯化铜，又包含掺入聚合氮化碳中的配位铜物种，这可以产生II型异质结。这种特殊的异质结能量结构有助于显著提高析氢的光电流密度。所提出的合成铜改性聚合氮化碳的策略可以激发对高效可见光活性光阴极开发的研究。
