期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 49, 页码 42723-42733出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b13163
关键词
Water splitting; photoelectrochemistry; hematite; confined growth; doping charge transport
资金
- National Natural Science Foundation of China [21422303, 21573049, 11604062]
- National Key R&D Program nanotechnology special focus [2016YFA0201600]
- Beijing Natural Science Foundation [2142036]
- Knowledge Innovation Program and Youth Innovation Promotion Association of CAS
The semiconductor/electrolyte interface plays a crucial role in photoelectrochemical (PEC) water-splitting devices as it determines both thermodynamic and kinetic properties of the photoelectrode. Interfacial engineering is central for the device performance improvement. Taking the cheap and stable hematite (alpha-Fe2O3) wormlike nanostructure photoanode as a model system, we design a facile sacrificial interlayer approach to suppress the crystal overgrowth and realize Ti doping into the crystal lattice of alpha-Fe2O3 in one annealing step as well as to avoid the consequent anodic shift of the photocurrent onset potential, ultimately achieving five times increase in its water oxidation photocurrent compared to the bare hematite by promoting the transport of charge carriers, including both separation of photogenerated charge carriers within the bulk semiconductor and transfer of holes across the semiconductor-electrolyte interface. Our research indicates that understanding the semiconductor/electrolyte interfacial engineering mechanism is pivotal for reconciling various strategies in a beneficial way, and this simple and cost-effective method can be generalized into other systems aiming for efficient and scalable solar energy conversion.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据