In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2016-01, No. 38 ( 2016-04-01), p. 1929-1929
Kurzfassung:
Artificial photosynthesis of value-added chemicals from CO 2 and water has received renewed attention and diverse technical solutions for high efficiency and durability systems have been explored. The photoelectrochemical (PEC) systems have been demonstrated to be technically viable with a number of semiconductor photoanodes (e.g., WO 3 , BiVO 4 , etc.) coupled to metal (Cu, Au, Ag, etc.) or metal oxide electrodes (CuO and Cu 2 O), as well as photocathodes (Si, Cu 2 O, CuO 2 , CuFeO 2 , etc.) coupled to metal/metal oxide anodes for CO 2 photoconversion. A photoelectrochemical cell, composed of WO 3 /dye-sensitized solar cell and copper oxide wire arrays, is demonstrated as an unassisted, durable device for CO 2 photoconversion. The high surface-to-volume copper oxide wire exhibits a promising electrocatalytic activity of CO 2 reduction reaction at faradaic efficiencies of ~80% and ~60% at E = -0.2 and -0.4 V vs . RHE, respectively. The single-absorber cell of a WO 3 photoanode and copper oxide wire cathode couple requires the minimum overpotential ( h ) of 0.7 V to drive CO 2 conversion. In the unassisted cell, the long-wave band (l 〉 ~450 nm) passes through the semi-transparent WO 3 film is absorbed by dye. The unassisted cell shows a potential gain of ~0.7 V, successfully driving the CO 2 conversion without any external power supply.
Materialart:
Online-Ressource
ISSN:
2151-2043
DOI:
10.1149/MA2016-01/38/1929
Sprache:
Unbekannt
Verlag:
The Electrochemical Society
Publikationsdatum:
2016
ZDB Id:
2438749-6
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