Bifunctional CoFeVOx Catalyst for Solar Water Splitting by using Multijunction and Heterojunction Silicon Solar Cells,Advanced Materials Technologies

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Bifunctional CoFeVOx Catalyst for Solar Water Splitting by using Multijunction and Heterojunction Silicon Solar Cells
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-11-13 , DOI: 10.1002/admt.202000592
Minoh Lee ₁ , Xinyu Ding ₁ , Swarnendu Banerjee ₁ , Florian Krause ₁ , Vladimir Smirnov ₁ , Oleksandr Astakhov ₁ , Tsvetelina Merdzhanova ₁ , Benjamin Klingebiel ₁ , Thomas Kirchartz _{1,

2} , Friedhelm Finger ₁ , Uwe Rau ₁ , Stefan Haas ₁

Affiliation

Photovoltaic driven electrochemical (PV‐EC) water splitting technology is considered as one of the solutions for an environmental‐friendly hydrogen supply. In a PV‐EC system, efficient catalysts are required to increase the rate of both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Here, the development of a CoFeVO_x bifunctional catalyst produced by a simple electrodeposition method is presented. It is found that after the water splitting reaction, vanadium is almost completely depleted in the mixture of elements for OER, while its concentration at the HER catalyst is similar or even higher after the reaction. For the OER catalyst, the depletion of vanadium might lead to the formation of pores, which could be correlated with the activity enhancement. The developed catalyst is integrated into PV‐EC devices, coupled with different types of silicon PV. An average solar to hydrogen efficiency of 13.3% (9.6 cm² PV aperture area) is achieved with a shingled module consisting of three laterally series‐connected silicon heterojunction solar cells.

中文翻译：

多结和异质结硅太阳能电池用于太阳能水分解的双功能CoFeVOx催化剂

光伏驱动的电化学（PV-EC）水分解技术被认为是环保氢气供应的解决方案之一。在PV-EC系统中，需要有效的催化剂来提高析氧反应（OER）和析氢反应（HER）的速率。在这里，CoFeVO _x的开发提出了通过简单的电沉积方法生产的双功能催化剂。发现在水分解反应之后，用于OER的元素混合物中的钒几乎完全耗尽，而在反应之后，其在HER催化剂上的浓度相似或什至更高。对于OER催化剂，钒的消耗可能导致孔的形成，这可能与活性的提高有关。已开发的催化剂已与不同类型的硅PV集成到PV-EC设备中。使用由三个横向串联的硅异质结太阳能电池组成的带盖模块，太阳能对氢的平均效率为13.3％（PV开口面积为9.6 cm ²）。

更新日期：2020-12-09

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