Hybridized Mechanical and Solar Energy-Driven Self-Powered Hydrogen Production.
Hybridized Mechanical and Solar Energy-Driven Self-Powered Hydrogen Production.
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混合机械和太阳能驱动的自供电制氢
DOI：
10.1007/s40820-020-00422-4
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发表时间：
2020-04-09
影响因子：
26.6
通讯作者：
Sun X
中科院分区：
文献类型：
--
作者：
Wei X;Wen Z;Liu Y;Zhai N;Wei A;Feng K;Yuan G;Zhong J;Qiang Y;Sun X
光电化学制氢是解决环境污染和能源危机的一种很有前途的方法。在这项工作中，我们提出了一个混合的机械和太阳能驱动的自供电制氢系统。采用旋转盘形摩擦电纳米发电机从水中获取机械能，并作为足够的外部动力源。在PEC水裂解电池中制备了WO 3/BiVO 4异质结光阳极。经变压整流后，在转速为60 rpm时，峰值电流达到0.1 mA。在这种情况下，H2释放过程仅在阳光照射下发生。当转速超过130 rpm时，峰值光电流和峰值暗电流具有几乎相等的值。水的直接电解几乎与水的光电催化同时进行。值得注意的是，在160 rpm转速下，在无光照或有光照的情况下，产氢速率增加到5.45和7.27 μL min− 1。相应的能量转换效率分别为2.43%和2.59%。所有的结果表明，这种自供电系统可以成功地实现PEC制氢，显示出良好的能量转换的可能性。
Photoelectrochemical hydrogen generation is a promising approach to address the environmental pollution and energy crisis. In this work, we present a hybridized mechanical and solar energy-driven self-powered hydrogen production system. A rotatory disc-shaped triboelectric nanogenerator was employed to harvest mechanical energy from water and functions as a sufficient external power source. WO3/BiVO4heterojunction photoanode was synthesized in a PEC water-splitting cell to produce H2. After transformation and rectification, the peak current reaches 0.1 mA at the rotation speed of 60 rpm. In this case, the H2evolution process only occurs with sunlight irradiation. When the rotation speed is over 130 rpm, the peak photocurrent and peak dark current have nearly equal value. Direct electrolysis of water is almost simultaneous with photoelectrocatalysis of water. It is worth noting that the hydrogen production rate increases to 5.45 and 7.27 μL min−1without or with light illumination at 160 rpm. The corresponding energy conversion efficiency is calculated to be 2.43% and 2.59%, respectively. All the results demonstrate such a self-powered system can successfully achieve the PEC hydrogen generation, exhibiting promising possibility of energy conversion.
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