Ti/Co-S catalyst covered amorphous Si-based photocathodes with high photovoltage for the HER in non-acid environments†,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ti/Co-S catalyst covered amorphous Si-based photocathodes with high photovoltage for the HER in non-acid environments†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-07 00:00:00 , DOI: 10.1039/c7ta09569d
Qixing Zhang _{1,

2,

3,

4,

5} , Tiantian Li _{1,

2,

3,

4,

5} , Jingshan Luo _{6,

7,

8,

9,

10} , Bofei Liu _{1,

2,

3,

4,

5} , Junhui Liang _{1,

2,

3,

4,

5} , Ning Wang _{1,

2,

3,

4,

5} , Xiangbin Kong _{1,

2,

3,

4,

5} , Baozhang Li _{1,

2,

3,

4,

5} , Changchun Wei _{1,

2,

3,

4,

5} , Ying Zhao _{1,

2,

3,

4,

5} , Xiaodan Zhang _{1,

2,

3,

4,

5}

Affiliation

Making highly efficient photoelectrodes for a photoelectrochemical (PEC) water splitting reaction is vitally important for bringing solar/electrical-to-hydrogen energy conversion processes into reality. Active and stable catalysts in the photoelectrode are the key component in PEC devices. Although most hydrogen evolution catalysts exhibit excellent performance in acid solutions, earth abundant oxygen evolution catalysts are generally unstable. Therefore, the elaborate design of highly active and stable photocathodes possessing great onset potential in non-acid environments is imperative. Here, we report that magnetron sputtering and electrochemical-deposition preparation methods are compatible with photo-absorbers for depositing titanium (Ti)/cobalt–sulfide (Co–S) catalyst on amorphous silicon/amorphous silicon (a-Si/a-Si) tandem solar cells, realizing a stable, low-cost, and efficient photocathode for water splitting in non-acid solutions. This photocathode exhibits a high photocurrent onset potential of 1.78 V vs. reversible hydrogen electrode (RHE) in alkaline and neutral electrolyte, with a photocurrent of 6.34 mA cm⁻² at 0 V vs. RHE. The facile preparation of this highly active a-Si/a-Si/Ti/Co–S photocathode paves the way to integrate them into various oxygen evolution catalysts to develop highly efficient, low-cost, and monolithic PEC solar water splitting devices.

中文翻译：

Ti / Co-S催化剂在非酸性环境中覆盖了具有高光电压的非晶硅基光电阴极，用于HER †

制作用于光电化学（PEC）水分解反应的高效光电极对于实现太阳能/电-氢能量转换过程至关重要。光电极中的活性和稳定催化剂是PEC装置中的关键组件。尽管大多数析氢催化剂在酸性溶液中均具有优异的性能，但富含地球的析氧催化剂通常不稳定。因此，必须在非酸性环境中精心设计具有高启动电位的高活性和稳定的光电阴极。在这里，我们报道磁控溅射和电化学沉积制备方法与光吸收剂兼容，该光吸收剂可在非晶硅/非晶硅（a-Si / a-Si）上沉积钛（Ti）/钴-硫化物（Co-S）催化剂串联太阳能电池实现了一种稳定，低成本，高效的光阴极，用于在非酸性溶液中进行水分解。该光电阴极具有1.78 V的高光电流起始电势与碱性和中性电解液中的可逆氢电极（RHE）相比，在0 V与RHE相比，光电流为6.34 mA cm ^-2。这种高活性的a-Si / a-Si / Ti / Co-S光电阴极的简便制备为将它们集成到各种氧气释放催化剂中，从而开发出高效，低成本和整体式PEC太阳能分水装置铺平了道路。

更新日期：2017-12-07

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11