NDLI: N-doped monolayer graphene catalyst on silicon photocathode for hydrogen production

Content Provider	Royal Society of Chemistry (RSC)
Author	An, Junghyun Seo, Jung-Hye Yang, Tae-Youl Kim, Kye Yeop Hong, Byung Hee Sim, Uk Nam, Ki Tae Moon, Joonhee Hwang, Jinyeon Han, Seungwu Lee, Jouhahn Lee, Joohee
Copyright Year	2013
Abstract	Carbon-based catalysts have been attracting attention in renewable energy technologies due to the low cost and high stability, but their insufficient activity is still a challenging issue. Here, we suggest that monolayer graphene can be used as a catalyst for solar-driven hydrogen evolution reaction on Si-photocathodes, and its catalytic activity is boosted by plasma treatment in N2-ambient. The plasma treatment induces abundant defects and the incorporation of nitrogen atoms in the graphene structure, which can act as catalytic sites on graphene. The monolayer graphene containing nitrogen impurities exhibits a remarkable increase in the exchange current density and leads to a significant anodic shift of the onset of photocurrent from the Si-photocathode. Additionally, monolayer graphene shows the passivation effect that suppresses the surface oxidation of Si, thus enabling the operation of the Si-photocathode in neutral water. This study shows that graphene itself can be applied to a photoelectrochemical system as a catalyst with high activity and chemical stability.
Starting Page	3658
Ending Page	3664
Page Count	7
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	6
Issue Number	12
Journal	Energy & Environmental Science
DOI	10.1039/c3ee42106f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Renewable energy Graphene Hydrogen Blood plasma Nitrogen Exchange current density Photocurrent Passivation (chemistry) Photoelectrochemical cell
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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