Use Electrostatic Attraction to Improve the Photocatalytic Hydrogen Evolution Efficiency

doi:10.7517/j.issn.1674-0475.2011.04.270

Abstract

Abstract: Two Ir(Ⅲ) complexes [Ir(ppy)₂(bpy)]⁺(ppy=2-phenylpyridine,bpy=2,2′-dipyridyl) and [Ir(ppy)₂(pbs)]^-(pbs=1,10-phenanthroline-4,7-diphenylsulfonic acid disodium salt) bearing one positive and one negative charge,respectively,were designed and synthesized to serve as photosensitizers.Using [Co(bpy)₃]²⁺ as hydrogen-evolving catalyst,the photocatalytic hydrogen evolution efficiencies of the two Ir(Ⅲ) complexes were compared.The Ir(Ⅲ) complex bearing one negative charge exhibits much higher photocatalytic hydrogen evolution activity than the Ir(Ⅲ) complex bearing one positive charge.It was confirmed that the electrostatic attraction between the negatively charged photosensitizer and positively charged catalyst plays an important role.

Key words: photocatalytic hydrogen evolution, electrostatic attraction, photosensitizer, hydrogen-evolving catalyst

CLC Number:

HE Li-qing, LUO Chao, ZHOU Qian-xiong, HOU Yuan-jun, ZHANG Bao-wen, WANG Xue-song. Use Electrostatic Attraction to Improve the Photocatalytic Hydrogen Evolution Efficiency[J]. Imaging Science and Photochemistry, 2011, 29(4): 270-277.

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