Light-induced water oxidation at silicon electrodes functionalized with a cobalt oxygen-evolving catalyst
Light-induced water oxidation at silicon electrodes functionalized with a cobalt oxygen-evolving catalyst
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DOI：
10.1073/pnas.1106545108
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发表时间：
2011-06
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影响因子：
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通讯作者：
J. Pijpers;M. Winkler;Y. Surendranath;T. Buonassisi;D. Nocera
中科院分区：
文献类型：
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作者：
J. Pijpers;M. Winkler;Y. Surendranath;T. Buonassisi;D. Nocera
将硅太阳能电池与新近开发的钴基裂水催化剂(Co-PI)相结合，可以得到一种坚固的整体式光助阳极，用于太阳能燃料在中性pH下将水分解为O2的过程。将Co-PI催化剂沉积在NP-Si结的ITO钝化的p面上，使太阳能电池产生的大部分电压能够被用于驱动水分解反应。与在碱性条件(pH为14)下操作相比，在中性pH条件下操作可提高阳极的稳定性，因为碱性条件下的长期稳定性更成问题。这次展示了一种简单、坚固的光助水分解结构，这是朝着开发廉价的直接太阳能到燃料能源转换技术迈出的重要一步。
Integrating a silicon solar cell with a recently developed cobalt-based water-splitting catalyst (Co-Pi) yields a robust, monolithic, photo-assisted anode for the solar fuels process of water splitting to O2 at neutral pH. Deposition of the Co-Pi catalyst on the Indium Tin Oxide (ITO)-passivated p-side of a np-Si junction enables the majority of the voltage generated by the solar cell to be utilized for driving the water-splitting reaction. Operation under neutral pH conditions fosters enhanced stability of the anode as compared to operation under alkaline conditions (pH 14) for which long-term stability is much more problematic. This demonstration of a simple, robust construct for photo-assisted water splitting is an important step towards the development of inexpensive direct solar-to-fuel energy conversion technologies.