Enhancing Graphene Protective Coatings by Hydrogen-Induced Chemical Bond Formation

TY - JOUR

T1 - Enhancing Graphene Protective Coatings by Hydrogen-Induced Chemical Bond Formation

AU - Hansen, Line Kyhl

AU - Balog, Richard

AU - Cassidy, Andrew

AU - Jørgensen, Jakob Holm

AU - Grubisic Cabo, Antonija

AU - Trotochaud, Lena

AU - Bluhm, Hendrik

AU - Hornekær, Liv

PY - 2018/9

Y1 - 2018/9

N2 - Increased interactions at the graphene-metal interface are here demonstrated to yield an effective prevention of intercalation of foreign species below the graphene cover. Hereby, an engineering pathway for increasing the usability of graphene as a metal coating is demonstrated. Graphene on Ir(111) (Gr/Ir(111)) is used as a model system, as it has previously been well-established that an increased interaction and formation of chemical bonds at the graphene-Ir interface can be induced by hydrogen functionalization of the graphene from its top side. With X-ray photoelectron spectroscopy, it is shown that hydrogen-induced increased interactions at the Gr/Ir(111) interface effectively prevents intercalation of CO in the millibar range. The scheme leads to protection against at least 10 times higher pressure and 70 times higher fluences of CO, compared to the protection offered by pristine Gr/Ir(111).

AB - Increased interactions at the graphene-metal interface are here demonstrated to yield an effective prevention of intercalation of foreign species below the graphene cover. Hereby, an engineering pathway for increasing the usability of graphene as a metal coating is demonstrated. Graphene on Ir(111) (Gr/Ir(111)) is used as a model system, as it has previously been well-established that an increased interaction and formation of chemical bonds at the graphene-Ir interface can be induced by hydrogen functionalization of the graphene from its top side. With X-ray photoelectron spectroscopy, it is shown that hydrogen-induced increased interactions at the Gr/Ir(111) interface effectively prevents intercalation of CO in the millibar range. The scheme leads to protection against at least 10 times higher pressure and 70 times higher fluences of CO, compared to the protection offered by pristine Gr/Ir(111).

KW - XPS

KW - coatings

KW - graphene

KW - intercalation

KW - interface

UR - http://www.scopus.com/inward/record.url?scp=85065214999&partnerID=8YFLogxK

U2 - 10.1021/acsanm.8b00610

DO - 10.1021/acsanm.8b00610

M3 - Journal article

C2 - 32596648

SN - 2574-0970

VL - 1

SP - 4509

EP - 4515

JO - ACS Applied Nano Materials

JF - ACS Applied Nano Materials

IS - 9

ER -