MoS-Si异质结提高光电化学产氢效率

Enhanced photoelectrochemical hydrogen production efficiency of MoS-Si heterojunction.

作者信息

Alarawi Abeer, Ramalingam Vinoth, Fu Hui-Chun, Varadhan Purushothaman, Yang Rusen, He Jr-Hau

出版信息

Opt Express. 2019 Apr 15;27(8):A352-A363. doi: 10.1364/OE.27.00A352.

DOI:10.1364/OE.27.00A352

Abstract

Photoelectrochemical water splitting is one of the viable approaches to produce clean hydrogen energy from water. Herein, we report MoS/Si-heterojunction (HJ) photocathode for PEC H production. The MoS/Si-HJ photocathode exhibits exceptional PEC H production performance with a maximum photocurrent density of 36.33 mA/cm, open circuit potential of 0.5 V vs. RHE and achieves improved long-term stability up to 10 h of reaction time. The photocurrent density achieved by MoS/Si-HJ photocathode is significantly higher than most of the MoS coupled Si-based photocathodes reported elsewhere, indicating excellent PEC H production performance.

摘要

光电化学水分解是从水中生产清洁氢能的可行方法之一。在此，我们报道了用于光电化学产氢的MoS₂/Si异质结（HJ）光阴极。MoS₂/Si-HJ光阴极表现出优异的光电化学产氢性能，最大光电流密度为36.33 mA/cm²，相对于可逆氢电极的开路电位为0.5 V，并在长达10小时的反应时间内实现了更好的长期稳定性。MoS₂/Si-HJ光阴极实现的光电流密度显著高于其他地方报道的大多数与Si基光阴极耦合的MoS₂，表明其具有优异的光电化学产氢性能。