Solar-to-hydrogen efficiency exceeding 2.5% achieved for overall water splitting with an all earth-abundant dual-photoelectrode

被引:96
作者
Ding, Chunmei
Qin, Wei
Wang, Nan
Liu, Guiji
Wang, Zhiliang
Yan, Pengli
Shi, Jingying [1 ]
Li, Can
机构
[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
基金
中国国家自然科学基金;
关键词
TA3N5 NANOROD ARRAYS; VISIBLE-LIGHT; PHOTOANODES; OXIDATION; CELLS; CATALYST; DRIVEN; OPTIMIZATION; ELECTRODES; DEVICE;
D O I
10.1039/c4cp02391a
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
The solar-to-hydrogen (STH) efficiency of a traditional mono-photoelectrode photoelectrochemical water splitting system has long been limited as large external bias is required. Herein, overall water splitting with STH efficiency exceeding 2.5% was achieved using a self-biased photoelectrochemical-photovoltaic coupled system consisting of an all earth-abundant photoanode and a Si-solar-cell-based photocathode connected in series under parallel illumination. We found that parallel irradiation mode shows higher efficiency than tandem illumination especially for photoanodes with a wide light absorption range, probably as the driving force for water splitting reaction is larger and the photovoltage loss is smaller in the former. This work essentially takes advantage of a tandem solar cell which can enhance the solar-to-electricity efficiency from another point of view.
引用
收藏
页码:15608 / 15614
页数:7
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