UV photoinduced reduction of water to hydrogen in Na2S, Na2SO3, and Na2S2O4 aqueous solutions

被引：47

作者：

Hara, K ^{[1
]}

Sayama, K ^{[1
]}

Arakawa, H ^{[1
]}

机构：

[1] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1999年 / 128卷 / 1-3期

关键词：

hydrogen formation; UV light irradiation; proton reduction;

D O I：

10.1016/S1010-6030(99)00156-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hydrogen was produced by ultraviolet (UV) light irradiation (>200 nm) in an Na2S aqueous solution without photocatalysts. Water (protons) appeared to be directly reduced to hydrogen by excited electrons produced in photon absorption with sulfide ions (S2-). The maximum quantum efficiency for hydrogen formation, 8.9%, was obtained in a 25 mmol dm(-3) Na2S solution. Marked amounts of hydrogen were produced under UV light irradiation in the aqueous solutions of SO32- and S2O42- ions. S2- ion absorption began at 290 nm, SO(3)(2-)at 275 nm, and S2O42- at 400 nm. Hydrogen hardly formed at all, however, in SO42-, I-, and SCN- solutions. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：27 / 31

页数：5

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