Enabling unassisted solar water splitting by iron oxide and silicon.
Enabling unassisted solar water splitting by iron oxide and silicon.
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通过氧化铁和硅实现无辅助太阳能分解水
DOI:
10.1038/ncomms8447
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发表时间:
2015-06-16
影响因子:
16.6
通讯作者:
Wang, Dunwei
中科院分区:
文献类型:
--
作者:
Jang, Ji-Wook;Du, Chun;Ye, Yifan;Lin, Yongjing;Yao, Xiahui;Thorne, James;Liu, Erik;McMahon, Gregory;Zhu, Junfa;Javey, Ali;Guo, Jinghua;Wang, Dunwei
Photoelectrochemical (PEC) water splitting promises a solution to the problem of large-scale solar energy storage. However, its development has been impeded by the poor performance of photoanodes, particularly in their capability for photovoltage generation. Many examples employing photovoltaic modules to correct the deficiency for unassisted solar water splitting have been reported to-date. Here we show that, by using the prototypical photoanode material of haematite as a study tool, structural disorders on or near the surfaces are important causes of the low photovoltages. We develop a facile re-growth strategy to reduce surface disorders and as a consequence, a turn-on voltage of 0.45 V (versus reversible hydrogen electrode) is achieved. This result permits us to construct a photoelectrochemical device with a haematite photoanode and Si photocathode to split water at an overall efficiency of 0.91%, with NiFeOxand TiO2/Pt overlayers, respectively.
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影响因子:
16.6
作者:
Abdi, Fatwa F.;Han, Lihao;van de Krol, Roel
通讯作者:
van de Krol, Roel
DOI:
10.1073/pnas.1118326109
发表时间:
2012-09-25
影响因子:
11.1
作者:
Barroso, Monica;Mesa, Camilo A.;Durrant, James R.
通讯作者:
Durrant, James R.
影响因子:
3.9
作者:
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通讯作者:
Turner, John A.
影响因子:
56.9
作者:
Luo, Jingshan;Im, Jeong-Hyeok;Graetzel, Michael
通讯作者:
Graetzel, Michael
影响因子:
41.2
作者:
Lin, Fuding;Boettcher, Shannon W.
通讯作者:
Boettcher, Shannon W.