光电阴极
光电流
串联
分解水
材料科学
半导体
光电子学
氢
光电化学电池
光催化
纳米技术
化学
物理
电解质
催化作用
电极
有机化学
复合材料
物理化学
电子
量子力学
生物化学
作者
Dingwang Huang,Lintao Li,Kang Wang,Yan Li,Kuang Feng,Feng Jiang
标识
DOI:10.1038/s41467-021-24060-5
摘要
Abstract A highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu 3 BiS 3 film-based photocathode meets the abovementioned requirements. The Cu 3 BiS 3 -based photocathode presents a remarkable onset potential over 0.9 V RHE with excellent photoelectrochemical current densities (~7 mA/cm 2 under 0 V RHE ) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu 3 BiS 3 -based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm 2 assisted by the BiVO 4 photoanode. A tandem device of Cu 3 BiS 3 -BiVO 4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm 2 large Cu 3 BiS 3 -BiVO 4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.
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