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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Si photoanode protected by a metal modified ITO layer with ultrathin NiO_x for solar water oxidation
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Si photoanode protected by a metal modified ITO layer with ultrathin NiO_x for solar water oxidation

机译:Si光电阳极由具有超薄NiO_x的金属改性ITO层保护,用于太阳能氧化

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摘要

We report an ultrathin NiO_x catalyzed Si np~+ junction photoanode for a stable and efficient solar driven oxygen evolution reaction (OER) in water. A stable semi-transparent ITO/Au/iTO hole conducting oxide layer, sandwiched between the OER catalyst and the Si photoanode, is used to protect the Si from corrosion in an alkaline working environment, enhance the hole transportation, and provide a pre-activation contact to the NiO_x catalyst. The NiO_x catalyzed Si photoanode generates a photocurrent of 1.98 mA cm~(-2) at the equilibrium water oxidation potential (E_(OER) = 0.415 V vs. NHE in 1 M NaOH solution). A thermodynamic solar-to-oxygen conversion efficiency (SOCE) of 0.07% under 0.51-sun illumination is observed. The successful development of a low cost, highly efficient, and stable photoelectrochemical electrode based on earth abundant elements is essential for the realization of a large-scale practical solar fuel conversion.
机译:我们报告了一种超薄的NiO_x催化的Si np〜+结光阳极,用于在水中稳定有效地进行太阳能驱动的氧释放反应(OER)。夹在OER催化剂和Si光电阳极之间的稳定的半透明ITO / Au / iTO空穴导电氧化物层可用于保护Si在碱性工作环境中免受腐蚀,增强空穴传输并提供预活化与NiO_x催化剂接触。 NiO_x催化的Si光电阳极在平衡水氧化电位下(在1 M NaOH溶液中,相对于NHE,E_(OER)= 0.415 V)产生1.98 mA cm〜(-2)的光电流。观察到在0.51阳光照射下,热力学的太阳能到氧气的转换效率(SOCE)为0.07%。基于大量地球元素的低成本,高效,稳定的光电化学电极的成功开发对于实现大规模实用的太阳能转换至关重要。

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