Surface Modification to a-SiC Photocathode Using Ruthenium Nanoparticles
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Surface Modification to a-SiC Photocathode Using Ruthenium Nanoparticles Feng Zhua, Ilvydas Matulionisa, Nicolas Gaillardb, Yuancheng Changb, Jian Hua, Josh Gallona, and Arun Madana a: MVSystems, Inc, 500 Corporate Circle, Suite L, Golden, CO, 80401，USA. b: Hawaii Natural Energy Institute (HNEI), University of Hawaii at Manoa, Honolulu, HI 96822, USA. Abstract In this paper we described using ruthenium (Ru) nanoparticles for surface modification on our hybrid PV/a-SiC photocathode for hydrogen production by water splitting under sunlight. Ru nanoparticles with size less than 5nm in diameter made the photocathode showed promising results: in an aqueous electrolyte an anodic shift of photocurrent onset potential around 450 mV and an increase in the photocurrent density up to 1.8mA/cm2 from a negligible value. Initial discussion the influence of Ru nanoparticles is presented.
INTRODUCTION We have developed a monolithic photoelectrochemical (PEC) device consisting of hydrogenated amorphous silicon carbide (a-SiC) layers and an a-Si tandem solar cells (PV), referred as hybrid PV/a-SiC device in this communication [1-3]. This PEC device was fabricated by plasma enhanced chemical vapor deposition (PECVD) technique at low temperature (
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