基于曙红Y氧化性猝灭的高活性和高稳定的可见光催化产氢催化剂

引用本文: 李波, 吕功煊. 基于曙红Y氧化性猝灭的高活性和高稳定的可见光催化产氢催化剂[J]. 物理化学学报, 2013, 29(08): 1778-1784. doi: 10.3866/PKU.WHXB201305302 shu

Citation: LI Bo, LÜ ng Xuan. Highly Active and Stable Catalyst for Visible Light Hydrogen Production Based on Oxidative Quenching of Eosin Y[J]. Acta Physico-Chimica Sinica, 2013, 29(08): 1778-1784. doi: 10.3866/PKU.WHXB201305302 shu

基于曙红Y氧化性猝灭的高活性和高稳定的可见光催化产氢催化剂

李波 ^1,2, ,
吕功煊 ^1,

基金项目:
国家自然科学基金(21173242) (21173242)

国家重点基础研究发展规划项目(973) (2009CB22003) (973) (2009CB22003)

国家高技术研究发展计划项目(863) (2012AA051501)资助 (863) (2012AA051501)

摘要:

以曙红Y(EY)敏化Pt/TiO₂(EY-Pt/TiO₂)光催化产氢体系为模型, 研究了电子传递剂甲基紫精(MV²⁺)的加入对该体系产氢活性和稳定性的影响, 并通过紫外-可见光(UV-Vis)吸收光谱、荧光光谱和光电化学表征手段对MV²⁺的作用机制进行了研究. 结果表明, 当以三乙醇胺(TEOA)为电子给体时, MV²⁺可使EY激发态发生氧化性和还原性淬灭, 有效降低了不稳定中间体EY^3-·的形成和积累, 促进了电子由染料分子向产氢活性位点的有效传递, 从而提高了产氢体系的活性和稳定性. 两种敏化体系瞬态光电流以及产氢活性受EY浓度影响的差异进一步证明, MV²⁺作为电子传递剂有效提高了光生电子的传递和利用效率.

关键词:

甲基紫精
/ 活性
/ 稳定性
/ 产氢
/ 光催化

English

Highly Active and Stable Catalyst for Visible Light Hydrogen Production Based on Oxidative Quenching of Eosin Y

LI Bo ^1,2, ,
LÜ ng Xuan ^1,

1.
1 Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Tianshui Zhong Road 18, Lanzhou 730000, P. R. China;
2 University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Received Date: 16 April 2013
Available Online: 09 July 2013
Fund Project:
国家自然科学基金(21173242)

国家重点基础研究发展规划项目(973) (2009CB22003)

国家高技术研究发展计划项目(863) (2012AA051501)资助

Abstract:

The effects and mechanism of methyl viologen (MV²⁺) on photocatalytic hydrogen production over an active, stable catalyst sensitized by Eosin Y (EY) under visible light were studied by UV-Vis absorption, fluorescence spectroscopies and photoelectric experiments. The results showed that MV²⁺ increased the efficiency of electron transfer from excited states of EY to the surface of Pt/TiO₂ and suppressed accumulation of unstable intermediate EY^3-· by an oxidative and reductive quenching mechanism. MV²⁺ also improved the activity and stability of photocatalytic hydrogen production by an EY-sensitized Pt/TiO₂ system with triethanolamine (TEOA) as an electron donor. The effects of transient photocurrent and concentration of EY on the hydrogen production activity of dye-sensitized systems with and without MV²⁺ provided further evidence that MV²⁺ acted as an electron transfer agent to effectively improve photoinduced electron transfer and utilization efficiency.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

基于曙红Y氧化性猝灭的高活性和高稳定的可见光催化产氢催化剂

English

Highly Active and Stable Catalyst for Visible Light Hydrogen Production Based on Oxidative Quenching of Eosin Y

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

基于曙红Y氧化性猝灭的高活性和高稳定的可见光催化产氢催化剂

English

Highly Active and Stable Catalyst for Visible Light Hydrogen Production Based on Oxidative Quenching of Eosin Y

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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