Na2CO3对TiO2纳米管电极表面光电化学水分解反应的催化作用研究

doi:10.61558/2993-074X.2100

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (1): 71-78. doi: 10.61558/2993-074X.2100

• 电化学材料基础与表界面研究专辑（中国科学院化学研究所万立骏院士主编） • 上一篇下一篇

Na₂CO₃对TiO₂纳米管电极表面光电化学水分解反应的催化作用研究

孔德生*，王静，张学迪，赵曦，王超，冯媛媛，李文娟

曲阜师范大学化学与化工学院，山东曲阜 273165

收稿日期:2012-06-04 修回日期:2012-06-30 出版日期:2013-02-28 发布日期:2012-07-05
通讯作者: 孔德生 E-mail:kongdscn@eyou.com
基金资助:
山东省自然科学基金(No. ZR2010EM026)和山东省优秀中青年科学家奖励基金(No. BS2011NJ009)资助

Sodium Carbonate Catalyzed Photoelectrochemical Water Splitting over TiO₂ Nanotubes Photoanode

KONG De-sheng*，WANG Jing，ZHANG Xue-di，ZHAO Xi，WANG Chao，FENG Yuan-yuan，LI Wen-juan

Department of Chemistry，Qufu Normal University，Qufu 273165，Shandong，China

Received:2012-06-04 Revised:2012-06-30 Published:2013-02-28 Online:2012-07-05
Contact: KONG De-sheng E-mail:kongdscn@eyou.com

摘要/Abstract

摘要： 光生载流子在半导体/溶液界面处发生的表面复合过程，是制约半导体光电极体系光-电转化效率提高的关键因素之一. 本文利用光电流测量和交流阻抗等技术，初步研究了Na₂CO₃对TiO₂纳米管电极表面光电化学水分解反应的催化作用，并对“TiO₂/溶液”界面处与阳极析氧有关的光生电荷传输过程及特点进行了探讨. 结果表明，在0.5 mol•L^-1 NaClO₄溶液中加入少量的Na₂CO₃（1 mmol•L^-1），能够显著促进光生空穴穿过TiO₂/溶液界面向溶液中的传输，有效地抑制光生载流子的表面复合过程，从而相应地增大外电路的光电流，提高TiO₂光电极体系的光-电转化效率.

关键词: 光生空穴, 表面复合, 光电流, 阳极析氧, Mott-Schottky分析

Abstract: Surface recombination of the photogenerated electron-hole pairs at semiconductor/electrolyte interface is one of the most essential reasons responsible for lowering photoconversion efficiency (Φ) of light to chemical energy for photoelectrochemical (PEC) water splitting reaction. In this paper，the catalytic effect of sodium carbonate on the oxygen evolution reaction (OER) over TiO₂ nanotubes photoanode during PEC water splitting was investigated by performing photocurrent and ac impedance measurements. It was demonstrated that the addiction of 1 mmol•L^-1 Na₂CO₃ in 0.5 mol•L^-1 NaClO₄electrolyte can effectively improve the charge transfer properties for the photogenerated holes across TiO2/electrolyte interface and inhibit the recombination of photogenerated carriers at this interface. As a result，both the measured photocurrent was increased and the photoconversion efficiency was enhanced.

Key words: photogenerated holes, surface recombination, photocurrent, anodic oxygen evolution, Mott-Schottky analysis

中图分类号:

O646

孔德生, 王静, 张学迪, 赵曦, 王超, 冯媛媛, 李文娟. Na₂CO₃对TiO₂纳米管电极表面光电化学水分解反应的催化作用研究[J]. 电化学（中英文）, 2013, 19(1): 71-78.

KONG De-sheng, WANG Jing, ZHANG Xue-di, ZHAO Xi, WANG Chao, FENG Yuan-yuan, LI Wen-juan. Sodium Carbonate Catalyzed Photoelectrochemical Water Splitting over TiO₂ Nanotubes Photoanode[J]. Journal of Electrochemistry, 2013, 19(1): 71-78.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.2100

https://electrochem.xmu.edu.cn/CN/Y2013/V19/I1/71

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Na₂CO₃对TiO₂纳米管电极表面光电化学水分解反应的催化作用研究

Sodium Carbonate Catalyzed Photoelectrochemical Water Splitting over TiO₂ Nanotubes Photoanode

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