Enhanced charge separation and transfer through Fe2O3/ITO nanowire arrays wrapped with reduced graphene oxide for water-splitting
Enhanced charge separation and transfer through Fe2O3/ITO nanowire arrays wrapped with reduced graphene oxide for water-splitting
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通过包裹有还原氧化石墨烯的 Fe2O3/ITO 纳米线阵列增强电荷分离和传输，用于水分解
DOI：
10.1016/j.nanoen.2016.08.059
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发表时间：
2016
期刊：
影响因子：
17.6
通讯作者：
Xie Erqing
中科院分区：
文献类型：
--
作者：
Zhang Zemin;Gao Caitian;Li Yunxia;Han Weihua;Fu Wenbin;He Yongmin;Xie Erqing
本文报道了还原氧化石墨烯（rGO）包裹的ITO@Fe2O3（rGO-ITO@ Fe 2 O3）核壳纳米线阵列的合成和研究，其中Fe 2 O3纳米棒作为主要的光吸收体，ITO纳米线作为高速电子导体，rGO作为高活性的电催化剂。这种设计大大降低了电荷转移和注入电阻，从而减少了复合并改善了氧反应动力学。结果表明，rGO-ITO@ Fe 2 O3光阳极在0.6 V（vs. SCE）下产生的光电流高达5.38 mA cm-2，是相同条件下ITO@Fe2O3和Fe 2 O3的3.5倍和10倍。rGO-ITO@ Fe 2 O3光阳极也表现出优异的光电化学稳定性，在60 min后没有明显的降解。我们的工作为提高水分解材料的能量转换效率和寿命提供了一种有效的策略。
This work reports the synthesis and investigation of reduced graphene oxide (rGO)-wrapped ITO@Fe2O3(rGO-ITO@Fe2O3) core-shell nanowire arrays for water splitting, in which Fe2O3nanorods are primary light-absorber, ITO nanowires act as high speed electron conductor and rGO as highly active electrocatalyst. This design considerably reduced the charge transfer and injection resistance, thus decreasing the recombination and improving the oxygen reaction kinetics. As a result, the rGO-ITO@Fe2O3photoanode yields a photocurrent up to 5.38 mA cm−2at 0.6 V (versus SCE), which is 3.5 times and 10 times of ITO@Fe2O3and Fe2O3in the same situation. The rGO-ITO@Fe2O3photoanode also exhibits an excellent photoelectrochemical stability and there is no obvious degradation after 60 min. Our work has provided an efficient strategy to improve the energy conversion efficiency and life-time of water splitting materials.