Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
J Am Chem Soc. 2012 Feb 8;134(5):2469-72. doi: 10.1021/ja209869k. Epub 2012 Jan 30.
Direct photoelectrochemical conversion of toluene (TL) to methylcyclohexane (MC) with water has been examined as an organic hydride conversion using light irradiation. The production of MC from TL was observed on Pt/CdS/Cu(2)ZnSnS(4)/Mo photoelectrodes with anion-type ionomer membrane assemblies. A cathodic photocurrent was observed below 0.7 V vs RHE (V(RHE)) in 0.1 M Na(2)SO(4)/NaOH (pH 9.5) aqueous solution, and an apparent photocurrent density of 0.5 mA cm(-2) was obtained at 0 V(RHE) under the irradiation of a 300 W Xe lamp with a 420 nm cutoff filter. The yield of MC was measured by gas chromatography, and an 88% faradaic efficiency was estimated. This study suggests the possibility of direct energy conversion from solar energy to MC as an energy carrier of organic hydrides.
已研究使用光照射将甲苯 (TL) 直接光电化学转化为甲基环己烷 (MC) 作为有机氢化物转化。在 Pt/CdS/Cu(2)ZnSnS(4)/Mo 光电电极上，采用阴离子型离聚物膜组件，观察到从 TL 生产 MC。在 0.1 M Na(2)SO(4)/NaOH (pH 9.5) 水溶液中，在 RHE(V(RHE)) 低于 0.7 V 时观察到阴极光电流，在 300 W Xe 灯照射下，在 0 V(RHE) 下获得了 0.5 mA cm(-2) 的表观光电流密度带有 420nm 截止滤光片。通过气相色谱法测量了 MC 的产率，并估计了 88%的法拉第效率。这项研究表明，从太阳能直接将能量转化为 MC 作为有机氢化物的能量载体是可能的。
