Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Department of Chemistry, Faculty of Science, King Abdulaziz University , Jeddah 21589, Saudi Arabia.
ACS Appl Mater Interfaces. 2016 Aug 17;8(32):20675-81. doi: 10.1021/acsami.6b04729. Epub 2016 Aug 3.
Few-atom clusters composed of nickel and sulfur have been successfully installed into the Zr(IV)-based metal-organic framework (MOF) NU-1000 via ALD-like chemistry (ALD = atomic layer deposition). X-ray photoelectron spectroscopy and Raman spectroscopy are used to determine that primarily Ni(2+) and S(2-) sites are deposited within the MOF. In a pH 7 buffered aqueous solution, the porous catalyst is able to produce H2 gas at a rate of 3.1 mmol g(-1) h(-1) upon UV irradiation, whereas no H2 is generated by irradiating bare NU-1000. Upon visible light irradiation, little H2 generation was observed; however, with the addition of an organic dye, rose bengal, NiS-AIM can catalyze the production of H2 at an enhanced rate of 4.8 mmol g(-1) h(-1). These results indicate that ALD in MOFs (AIM) can engender reactivity within high surface area supports for applications in the solar fuels field.
通过原子层沉积（ALD）类似的化学方法，已成功将由镍和硫组成的少数原子簇安装到基于 Zr（IV）的金属有机骨架（MOF）NU-1000 中。X 射线光电子能谱和拉曼光谱用于确定主要在 MOF 中沉积 Ni（2+）和 S（2-）位。在 pH 为 7 的缓冲水溶液中，多孔催化剂在 UV 照射下能够以 3.1 mmol g（-1）h（-1）的速率产生 H2 气体，而照射裸 NU-1000 则不会产生 H2。可见光照射时，观察到很少有 H2 的生成；然而，添加有机染料玫瑰红 Bengal 后，NiS-AIM 可以以 4.8 mmol g（-1）h（-1）的增强速率催化 H2 的生成。这些结果表明，MOFs 中的原子层沉积（AIM）可以在高表面积载体中产生反应性，从而应用于太阳能燃料领域。
