Black Phosphorus-Based Compound with Few Layers for Photocatalytic Water Oxidation

作者：Yan, Junqing; Ji, Yujin; Kong, Lingqiao; Li, Youyong; Navlani-Garcia, Miriam; Liu, Shengzhong; Kuwahara, Yasutaka; Mori, Kohsuke; Che, Michel; Yamashita, Hiromi^*

来源：ChemCatChem, 2018, 10(16): 3424-3428.

DOI：10.1002/cctc.201800555

• black phosphorus
• Ni(OH)(2)
• water oxidation
• photocatalysis
• carriers' separation

Although black phosphorus (BP) is an interesting 2D nanosheet material with a high hole mobility, its application in the photocatalytic water oxidation for O-2 evolution is not reported yet. Herein the use of BP coupled with a reductive hydroxide, Ni(OH)(2), is reported for the first time. The developed photo-assisted process confirms that the BP XPS measurements confirm that the oxidation state of BP is reduced through the photo-assisted loading method. The obtained P-Ni(OH)(2) samples present the steady and efficient photocatalytic water splitting for O-2 generation. Under the simulated sunlight irradiation in 0.1 M Na2S2O4 solution, the O-2 generation rate can reach up to 15.7 mu mol/(g(catalyst)*h) or 224.3 mu mol/(g(BP)*h). The density functional theory (DFT) calculation suggests that the electrons and holes move to surface of BP and Ni(OH)(2), respectively. The merit of self-polarization of P-Ni(OH)(2) ensures the stability of BP and achieves the photocatalytic O-2 generation from water.

• 出版日期2018-8-21
• 单位苏州大学; 陕西师范大学