Photocorrosion-resistant Sb2Se3 photocathodes with earth abundant MoSx hydrogen evolution catalyst,Journal of Materials Chemistry A

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Photocorrosion-resistant Sb2Se3 photocathodes with earth abundant MoSx hydrogen evolution catalyst
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-10-24 00:00:00 , DOI: 10.1039/c7ta08993g
Rajiv Ramanujam Prabhakar _{1,

2,

3} , Wilman Septina _{1,

2,

3} , Sebastian Siol _{3,

4,

5} , Thomas Moehl _{1,

2,

3} , René Wick-Joliat _{1,

2,

3} , S. David Tilley _{1,

2,

3}

Affiliation

The poor stability of high efficiency photoabsorber materials in aqueous media is one factor holding back the realization of photoelectrochemical (PEC) water splitting for large scale, practical solar fuels generation. Here, we demonstrate that highly efficient thin film Sb₂Se₃ – fabricated by a simple, low temperature selenization of electrodeposited Sb – is intrinsically stable towards photocorrosion in strongly acidic media (1 M H₂SO₄). Coupling with a photoelectrodeposited MoS_x hydrogen evolution catalyst gives high photocurrents (5 mA cm⁻² at 0 V vs. RHE) and high stability without protective layers. A low temperature sulfurization of the Sb₂Se₃–MoS_x stack dramatically improved the onset potential, resulting in high photocurrent densities up to ∼16 mA cm⁻² at 0 V vs. RHE. The simplicity with which these photocathodes are fabricated, combined with the high photocurrents and stability, make Sb₂Se₃ a strong candidate for scalable PEC cells.

中文翻译：

具有丰富的MoS _x析氢催化剂的耐光蚀性Sb ₂ Se ₃光电阴极

高效光吸收材料在水性介质中的不良稳定性是阻碍实现大规模实用太阳能燃料的光化学（PEC）水分解的实现的因素之一。在这里，我们证明了通过简单的低温硒化电沉积Sb制成的高效薄膜Sb ₂ Se ₃对强酸性介质（1 MH ₂ SO ₄）中的光腐蚀本质上是稳定的。与光电沉积的MoS _x析氢催化剂耦合可提供高光电流（0 V vs. RHE时为5 mA cm ^-2）和高稳定性，而无需保护层。锑的低温硫化₂ Se₃ –MoS_x叠层极大地提高了启动电位，从而在0 V相对于RHE的情况下产生了高达〜16 mA cm^-2的高光电流密度。这些光阴极的制造简单，再加上高的光电流和稳定性，使得Sb₂ Se₃成为可扩展PEC电池的强大候选者。

更新日期：2017-11-14

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