论文标题
溶液处理的GASE基于纳米瓦的薄膜，用于光电化学水分裂和光电化学型光电探测器
Solution-processed GaSe nanoflake-based films for photoelectrochemical water splitting and photoelectrochemical-type photodetectors
论文作者
论文摘要
甲壳虫（GASE）是一种分层化合物，由于其各向异性结构和伪导向光学间隙，该化合物已在非线性光学应用和光电检测器中被利用。理论研究预测，其二维（2D）形式是水分分裂反应的潜在光催化剂。在此，我们首先报告了通过液相去角质产生的GASE纳米片（单层/几层片）的光电化学（PEC）表征，用于酸性和碱性培养基中的氢进化反应（HER）和氧气进化反应（OER）。在0.5 m H2SO4中，GASE光电子表现出最佳的PEC性能，即她（φSAVED，她）为0.09％的比例电力电量指标，而OER（φsaved，oer，OER）的比例仪保存的度量指标为0.25％。当用作PEC型光电探测器时，GASE光电子在455 nm照明时在光强度为63.5 uw cm-2时显示出〜0.16 a W-1的响应性，-0.3 V vs.可逆的氢电极（RHE）的施加电位。 GASE光电探测器的稳定性分析证明了她对她的0.5 m H2SO4的阴极线性扫描伏安法扫描的持久操作。由于高度氧化的环境和O2诱导的（照片）氧化效应，在碱性和阳极操作中都观察到了Viceversa的降解效应。我们的结果为GASE纳米瓦斯的PEC特性提供了新的见解，以在光电催化，PEC型光电探测器和（BIO）传感器中剥削。
Gallium selenide (GaSe) is a layered compound, which has been exploited in nonlinear optical applications and photodetectors due to its anisotropic structure and pseudo-direct optical gap. Theoretical studies predicted that its two-dimensional (2D) form is a potential photocatalyst for water splitting reactions. Herein, we first report the photoelectrochemical (PEC) characterization of GaSe nanoflakes (single-/few-layer flakes), produced via liquid phase exfoliation, for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in both acidic and alkaline media. In 0.5 M H2SO4, the GaSe photoelectrodes display the best PEC performance, i.e. a ratiometric power-saved metric for HER (Φsaved,HER) of 0.09% and a ratiometric power-saved metric for OER (Φsaved,OER) of 0.25%. When used as PEC-type photodetectors, GaSe photoelectrodes show a responsivity of ~0.16 A W-1 upon 455 nm illumination at light intensity of 63.5 uW cm-2 and applied potential of -0.3 V vs. reversible hydrogen electrode (RHE). The stability analysis of the GaSe photodetectors evidences a durable operation over tens of cathodic linear sweep voltammetry scans in 0.5 M H2SO4 for HER. Viceversa, degradation effects have been observed in both alkaline and anodic operation due to highly oxidizing environment and O2-induced (photo-)oxidation effects. Our results provide new insight into PEC properties of GaSe nanoflakes for their exploitation in photoelectrocatalysis, PEC-type photodetectors and (bio)sensors.
