Unveiling the Mechanisms Leading to H2 Production Promoted by Water Decomposition on Epitaxial Graphene at Room Temperature

被引：65

作者：

Politano, Antonio ^{[1
]}

Cattelan, Mattia ^{[2
,3
]}

Boukhvalov, Danil W. ^{[4
,5
]}

Campi, Davide ^{[6
]}

Cupolillo, Anna ^{[1
]}

Agnoli, Stefano ^{[2
,3
]}

Apostol, Nicoleta G. ^{[7
,12
]}

Lacovig, Paolo ^{[7
]}

Lizzit, Silvano ^{[7
]}

Farias, Daniel ^{[8
,9
,10
]}

Chiarello, Gennaro ^{[1
]}

Granozzi, Gaetano ^{[2
,3
]}

Larcipretev, Rosanna ^{[11
]}

机构：

[1] Univ Calabria, Dept Phys, Via Ponte Bucci,31-C, I-87036 Cosenza, Italy

[2] Univ Padua, Dept Chem Sci, Via Marzolo 1, I-35131 Padua, Italy

[3] Univ Padua, INSTM Res Unit, Via Marzolo 1, I-35131 Padua, Italy

[4] Hanyang Univ, Dept Chem, 17 Haengdang Dong, Seoul 133791, South Korea

[5] Ural Fed Univ, Theoret Phys & Appl Math Dept, Mira St 19, Ekaterinburg 620002, Russia

[6] Univ Milano Bicocca, Dept Mat Sci, Via R Cozzi 55, I-20125 Milan, Italy

[7] Elettra Sincrotrone Trieste SCpA, SS 14,Km 163-5, I-34149 Trieste, Italy

[8] Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain

[9] Univ Autonoma Madrid, Inst Ciencia Mat Nicolas Cabrera, E-28049 Madrid, Spain

[10] Univ Autonoma Madrid, Condensed Matter Phys Ctr IFIMAC, E-28049 Madrid, Spain

[11] CNR, Inst Complex Syst, Via Fosso del Cavaliere 100, I-00133 Rome, Italy

[12] Natl Inst Mat Phys, Atomistilor 405A, Magurele 077125, Ilfov, Romania

来源：

ACS NANO | 2016年 / 10卷 / 04期

关键词：

graphene; water; hydrogen storage; hydrogen production; HYDROGEN-STORAGE; REVERSIBLE HYDROGENATION; DECORATED GRAPHENE; SURFACE-CHEMISTRY; HEMATITE FILMS; CARBON; CO; ADSORPTION; GENERATION; ELECTRODES;

D O I：

10.1021/acsnano.6b00554

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

By means of a combination of surface-science spectroscopies and theory, we investigate the mechanisms ruling the catalytic role of epitaxial graphene (Gr) grown on transition-metal substrates for the production of hydrogen from water. Water decomposition at the Gr/metal interface at room temperature provides a hydrogenated Gr sheet, which is buckled and decoupled from the metal substrate. We evaluate the performance of Gr/metal interface as a hydrogen storage medium, with a storage density in the Gr sheet comparable with state-of-the-art materials (1.42 wt %). Moreover, thermal programmed reaction experiments show that molecular hydrogen can be released upon heating the water-exposed Gr/metal interface above 400 K. The Gr hydro/dehydrogenation process might be exploited for an effective and eco-friendly device to produce (and store) hydrogen from water, i.e., starting from an almost unlimited source.

引用

页码：4543 / 4549

页数：7

共 54 条

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