Hydrogen-absorbing characteristics of 15 rare earth elements

Hirano, Katsuhiko; Kadono, J.; Yamamoto, Satoru; Tanabe, Teruo; Miyake, Hidekazu

doi:10.1016/j.jallcom.2005.04.052

Cited by 17 publications

(15 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The large time delay prior to absorption is also consistent with the work on bulk samarium reported in Ref. 11 …”

Section: ͒ Equation ͑1͒supporting

confidence: 90%

“…The large time delay observed prior to the onset of hydrogenation is similar to that observed by other workers who performed their measurements on bulk ͑1 g͒ samarium. 11 In conclusion we have described an apparatus which can measure the hydrogen absorption in isolated nanostructures scattered on a SAW resonator. The absolute mass sensitivity attainable with this apparatus using 315 MHz resonators has been determined through an independent mass measurement obtained from scanning electron microscopy pictures of the deposited isolated nanoparticles.…”

Section: ͒ Equation ͑1͒mentioning

confidence: 99%

See 1 more Smart Citation

A technique to measure hydrogen absorption in isolated nanometer structures

Phillips

Shivaram

2008

Review of Scientific Instruments

View full text Add to dashboard Cite

We describe an apparatus assembled to measure hydrogen absorption on a monolayer of isolated nanometer scale entities. Utilizing inexpensive and readily available high frequency surface acoustic wave (SAW) sensors we achieve a sensitivity of 4 pg, sufficient to detect hydrogen uptake at less than 1% in nanogram level samples of such entities at room temperature. Results of hydriding rare earth metal nanoparticles and a transition metal-carbon complex measured with 315 MHz SAW resonators are presented. However, the design of our apparatus is general and can be used with a wide variety of commercial SAW sensors.

show abstract

“…The large time delay prior to absorption is also consistent with the work on bulk samarium reported in Ref. 11 …”

Section: ͒ Equation ͑1͒supporting

confidence: 90%

Section: ͒ Equation ͑1͒mentioning

confidence: 99%

A technique to measure hydrogen absorption in isolated nanometer structures

Phillips

Shivaram

2008

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

“…When x exceeds 2.2 in YbH x , the cubic and 0 ' phases, in which only lattice parameters differ, appear. The and 0 phases, in Yb 2þ and Yb 3þ , are mixed valent and trivalent states, respectively [7][8][9].…”

mentioning

confidence: 99%

Structural and Valence Changes of Europium Hydride Induced by Application of High-PressureH2

et al. 2011

View full text Add to dashboard Cite

Europium hydride EuH(x), when exposed to high-pressure H₂, has been found to exhibit the following structural and valence changes: Pnma(x = 2, divalent) → P6₃/mmc(x = 2, 7.2-8.7 GPa) → I4/m(x > 2, 8.7-9.7 GPa) → I4/mmm(x > 2, 9.7 GPa-,trivalent). With a trivalent character and a distorted cubic fcc structure, the I4/mmm structure is the β phase commonly observed for other rare-earth metal hydrides. Our study clearly demonstrates that EuH(x) is no longer an irregular member of the rare-earth metal hydrides.

show abstract

“…Eu 3 /SWCNT can store eight H 2 molecules per Eu atom, while six H 2 molecules attach on the Yb atom, because the space of RE atoms outside the SWCNT is different. Pure Yb hardly attach hydrogen molecules [28,29], however, Yb doped CNTs are capable of storing hydrogen with a mass density higher than 3.18 wt%.…”

Section: The Binding Energy Of a Single Yb Atom At Hexagonal Sites Ismentioning

confidence: 99%

Yb-Decorated Carbon Nanotubes As a Potential Capacity Hydrogen Storage Medium

Lei¹,

Zhang²,

Wu³

2013

MNSMS

View full text Add to dashboard Cite

We report a first-principles study, which demonstrates that a single Yb atom coated on a single-walled nanotube (SWNT), B atom doped CNT and N atom doped CNT binds up to six hydrogen molecules. At high Yb coverage we show that a SWNT can strongly adsorb up to 3.18 wt% hydrogen. Yb-4f electrons have no contribution on the adsorption of hydrogen molecules in Yb doped CNT. The charge analysis results show that 4f electrons remain in Yb. These results promote our fundamental understanding of dissociative adsorption of hydrogen in RE atom doped carbon nanostructures.

show abstract

Hydrogen-absorbing characteristics of 15 rare earth elements

Cited by 17 publications

References 5 publications

A technique to measure hydrogen absorption in isolated nanometer structures

A technique to measure hydrogen absorption in isolated nanometer structures

Structural and Valence Changes of Europium Hydride Induced by Application of High-PressureH2

Yb-Decorated Carbon Nanotubes As a Potential Capacity Hydrogen Storage Medium

Contact Info

Product

Resources

About