TEM studies of M(1)Ti2(PO4)3 nasicon-type mild oxidation catalysts in situ observation of mobility and dismutation of M(1) = Cu or Ag

Oudet, F.; Vejux, A.; Kompany, T.; Bordes, E.; Courtine, P.

doi:10.1016/0025-5408(89)90103-7

Cited by 20 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It shows catalytic activity in the dehydrogenation or dehydration of 2-propanol. 8 Cu II TP has been prepared so far via the oxidation of Cu I TP at 500°C under an oxygen-containing atmosphere and the subsequent washing out of the byproduct, CuO, by 2N HNO 3 . 7 Cu I TP ceramics were prepared via calcination in a sealed tube under vacuum or in an inert-gas atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…7 Cu I TP ceramics were prepared via calcination in a sealed tube under vacuum or in an inert-gas atmosphere. 7,8 However, this processing has disadvantages in that it requires a long time to obtain the final Cu II TP and the resulting Cu II TP has a relatively small surface area (1.6 m 2 /g). 9 In the present work, we have developed a novel route for the preparation of the porous Cu II TP glass-ceramic.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Microporous Glass‐Ceramics in NASICON‐Type Copper(II) Titanium Phosphate

Yamamoto

Abe

1998

Journal of the American Ceramic Society

View full text Add to dashboard Cite

A novel porous glass‐ceramic with a skeleton of a NASICON‐type copper(II) titanium phosphate was prepared via the controlled crystallization of a glass and the subsequent chemical leaching of the resulting dense glass‐ceramic. A volume‐crystallized dense glass‐ceramic comprised of CuTi2(PO4)3 and Cu3(PO4)2, whose surface was covered by a thin layer of CuO, was prepared by reheating a glass with a nominal composition of 50CuO20TiO230P2O5 (in mol%) in air. When the resulting glass‐ceramic was leached with dilute HCl, the Cu3(PO4)2 and CuO phases were dissolved out selectively, and a cuprous NASICON crystal of CuTi2(PO4)3 was converted to its cupric type, CuTi4(PO4)6, which was left as a skeleton of the porous materials. The specific surface area and the average pore radius of the porous glass‐ceramic obtained were ∼70 m2/g and ∼7 nm, respectively. The porous glass‐ceramic showed high catalytic activities for the dehydration of 2‐propanol.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microporous Glass‐Ceramics in NASICON‐Type Copper(II) Titanium Phosphate

Yamamoto

Abe

1998

Journal of the American Ceramic Society

View full text Add to dashboard Cite

show abstract

Copper Titanium Zirconium Phosphate CuTiZr(PO₄)₃by a Solid‐State Reaction Using Ammonium Dihydrogenphosphate as the Phosphating Reagent

Warner

2011

Synthesis, Properties and Mineralogy of Important Inorganic Materials

View full text Add to dashboard Cite

New Copper Phosphates as Ionic or Mixed Conductors

Warner

Milius

Maier

1992

Ber Bunsenges Phys Chem

View full text Add to dashboard Cite

Electrochemistry 1 Ionic Conductivity / Nusicon, Copper Phosphates Spectroscopy, Impedunce As part of a search for solid-state copper ion conductors, new copper phosphate compounds of the Nasicon or alluaudite type structure were synthesized. Compounds with the former structure are reported here in more depth. CuTiZrP3012 and the previously prepared compound CuTi2P3OI2 were found to be copper ion conductors with a relatively low electronic contribution, and comparable both in structure and in conductivity behaviour to both CuZr2P3OI2 and the NaZr2P3012 end-member of the classical Nasicon composition range. In contrast to the Cu(1) halide conductors these phases are stable under ambient conditions. Partial substitution of Zr by Sc, or Ti by Cr (rather than Si for P) results in a new Cu-rich compound Cu2ZrScP301z, together with the previously prepared compound Cu2TiCrP3012, both showing expectedly very high Cu+ conductivity comparable to Nasicon compounds with a similar charge carrier concentration. A new related phase CuTiCrP,012 was also synthesized. Magnetic measurements, WagnerHebb polarization and e. m. f. measurements performed to elucidate partial conductivity contributions and valence states are discussed. The e. m. f. results obtained with Cu-activity cells reveal a predominant ionic conductance together with a minor but not negligible electronic contribution resulting in a fast copper diffusion. Cu-Fe and Cu-Mg phosphates were also prepared for the first time as first examples of quaternary compounds in the Cu -Fe -P -0 and Cu -Mg-P -0 system respectively. These materials, Cul 3Fe,P3012 and Cu2Mg3P3012 were found to be of the alluaudite structure type, with predominant electronic conductivity at high temperature.

show abstract

TEM studies of M(1)Ti2(PO4)3 nasicon-type mild oxidation catalysts in situ observation of mobility and dismutation of M(1) = Cu or Ag

Cited by 20 publications

References 14 publications

Microporous Glass‐Ceramics in NASICON‐Type Copper(II) Titanium Phosphate

Microporous Glass‐Ceramics in NASICON‐Type Copper(II) Titanium Phosphate

Copper Titanium Zirconium Phosphate CuTiZr(PO₄)₃by a Solid‐State Reaction Using Ammonium Dihydrogenphosphate as the Phosphating Reagent

New Copper Phosphates as Ionic or Mixed Conductors

Contact Info

Product

Resources

About

TEM studies of M(1)Ti2(PO4)3 nasicon-type mild oxidation catalysts in situ observation of mobility and dismutation of M(1) = Cu or Ag

Cited by 20 publications

References 14 publications

Microporous Glass‐Ceramics in NASICON‐Type Copper(II) Titanium Phosphate

Microporous Glass‐Ceramics in NASICON‐Type Copper(II) Titanium Phosphate

Copper Titanium Zirconium Phosphate CuTiZr(PO4)3by a Solid‐State Reaction Using Ammonium Dihydrogenphosphate as the Phosphating Reagent

New Copper Phosphates as Ionic or Mixed Conductors

Contact Info

Product

Resources

About

Copper Titanium Zirconium Phosphate CuTiZr(PO₄)₃by a Solid‐State Reaction Using Ammonium Dihydrogenphosphate as the Phosphating Reagent