TY - JOUR

T1 - Nanoporous water oxidation electrodes with a low loading of laser-deposited Ru/C exhibit enhanced corrosion stability

AU - Haschke, Sandra

AU - Pankin, Dmitrii

AU - Mikhailovskii, Vladimir

AU - Barr, Maïssa K.S.

AU - Both-Engel, Adriana

AU - Manshina, Alina

AU - Bachmann, Julien

PY - 2019/1/11

Y1 - 2019/1/11

N2 - For the oxidation of water to dioxygen, oxide-covered ruthenium metal is known as the most efficient catalyst, however, with limited stability. Herein, we present a strategy for incorporating a Ru/C composite onto a novel nanoporous electrode surface with low noble metal loading and improved stability. The Ru/C is coated on the pore walls of anodic alumina templates in a one-step laser-induced deposition method from Ru3(CO)12 solutions. Scanning electron microscopy proves the presence of a continuous Ru/C layer along the inner pore walls. The amorphous material consists of metallic Ru incorporated in a carbonaceous C matrix as shown by X-ray diffraction combined with Raman and X-ray photoelectron spectroscopies. These porous electrodes reveal enhanced stability during water oxidation as compared to planar samples at pH 4. Finally, their electrocatalytic performance depends on the geometric parameters and is optimized with 13 μm pore length, which yields 2.6 mA cm-2, or 49 A g-1, at η = 0.20 V.

AB - For the oxidation of water to dioxygen, oxide-covered ruthenium metal is known as the most efficient catalyst, however, with limited stability. Herein, we present a strategy for incorporating a Ru/C composite onto a novel nanoporous electrode surface with low noble metal loading and improved stability. The Ru/C is coated on the pore walls of anodic alumina templates in a one-step laser-induced deposition method from Ru3(CO)12 solutions. Scanning electron microscopy proves the presence of a continuous Ru/C layer along the inner pore walls. The amorphous material consists of metallic Ru incorporated in a carbonaceous C matrix as shown by X-ray diffraction combined with Raman and X-ray photoelectron spectroscopies. These porous electrodes reveal enhanced stability during water oxidation as compared to planar samples at pH 4. Finally, their electrocatalytic performance depends on the geometric parameters and is optimized with 13 μm pore length, which yields 2.6 mA cm-2, or 49 A g-1, at η = 0.20 V.

KW - Electrochemistry

KW - Nanostructures

KW - Noble metals

KW - Ruthenium catalyst

KW - Water splitting

KW - RUO2

KW - MIXED OXIDES

KW - HIGH-PRESSURE

KW - electrochemistry

KW - RAMAN-SPECTROSCOPY

KW - RUTHENIUM OXIDE

KW - noble metals

KW - nanostructures

KW - ELECTROCATALYSTS

KW - IRON(III) OXIDE

KW - NANOPARTICLES

KW - OXYGEN EVOLUTION

KW - water splitting

KW - ruthenium catalyst

KW - SPECTRA

UR - http://www.scopus.com/inward/record.url?scp=85060169897&partnerID=8YFLogxK

U2 - 10.3762/bjnano.10.15

DO - 10.3762/bjnano.10.15

M3 - Article

AN - SCOPUS:85060169897

VL - 10

SP - 157

EP - 167

JO - Beilstein Journal of Nanotechnology

JF - Beilstein Journal of Nanotechnology

SN - 2190-4286

IS - 1

ER -