摘要
Integration of molybdenum disulfide （MoS2） onto high surface area photocathod is highly desired to minimize the overpotential for the solar-powered hydrogen evolution reaction （HER）. Semiconductor nanowires （NWs） are beneficial use in photoelectrochemistry because of their large electrochemically availab surface area and inherent ability to decouple light absorption and the transpo of minority carriers. Here, silicon （Si） NW arrays were employed as a mod photocathode system for MoS2 wrapping, and their solar-driven HER activil was evaluated. The photocathode is made up of a well-defined MoSJTiO2/Si coaxial NW heterostructure, which yielded photocurrent density up to 15 mA/cm2 （at 0 V vs. the reversible hydrogen electrode （RHE）） with goo stability under the operating conditions employed. This work reveals the earth-abundant electrocatalysts coupled with high surface area NW electrod~ can provide performance comparable to noble metal catalysts for photocathod hydrogen evolution.
铝二硫化物的集成(瞬间 < 潜水艇 class= “ a-plus-plus ” > 2 </sub>) 高度被需要到高表面区域光阴极上为太阳动力的氢进化反应最小化过电位(她的) 。因为他们到 decouple 光吸收和少数搬运人的运输的大电气化学地可得到的表面区域和固有的能力，半导体 nanowires (NW ) 为在 photoelectrochemistry 的使用是有益的。这里，硅(Si ) NW 数组为瞬间作为一个模型光阴极系统被采用 < 潜水艇 class= “ a-plus-plus ” > 2 </sub> 包装纸，并且他们的太阳开车她的活动被评估。光阴极由组成一明确的瞬间<潜水艇class=“ a-plus-plus ”> 2 </sub>/TiO<sub class=“ a-plus-plus ”> 2 </sub>/Si 同轴的 NW heterostructure ，它产出光电流密度依赖 15 妈/厘米<啜class=“ a-plus-plus ”> 2 </sup>(在 0 V 对可逆的氢电极( RHE ))与在采用的操作条件下面的好稳定性。这个工作表明地球丰富的 electrocatalysts 结合了电极能提供的高表面区域 NW 比得上为 photocathodic 氢的高贵金属催化剂的性能进化。
