催化作用
聚合物
材料科学
化学工程
光化学
高分子化学
组合化学
作者
Xavier Elias,Quan Liu,Carolina Gimbert-Suriñach,Roc Matheu,Paola Mantilla-Perez,Alberto Martínez-Otero,Xavier Sala,Jordi Martorell,Antoni Llobet
标识
DOI:10.1021/acscatal.6b01036
摘要
We report a photovoltaics-electrochemical (PV-EC) assembly based on a compact and easily processable triple homojunction polymer cell with high fill factor (76%), optimized conversion efficiencies up to 8.7%, and enough potential for the energetically demanding water splitting reaction (Voc = 2.1 V). A platinum-free cathode made of abundant materials is coupled to a ruthenium oxide on glassy carbon anode (GC-RuO2) to perform the reaction at optimum potential (ΔE = 1.70–1.78 V, overpotential = 470–550 mV). The GC-RuO2 anode contains a single monolayer of catalyst corresponding to a superficial concentration (Γ) of 0.15 nmol cm—2 and is highly active at pH 7. The PV-EC cell achieves solar to hydrogen conversion efficiencies (STH) ranging from 5.6 to 6.0%. As a result of the solar cell’s high fill factor, the optimal photovoltaic response is found at 1.70 V, the minimum potential at which the electrodes used perform the water splitting reaction. This allows generating hydrogen at efficiencies that would be v...
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