Catalysis and proton-conduction of novel phosphate glasses
The performance of phosphate glasses as a catalyst for water decomposition and a proton conductor was investigated. Glasses with a composition of 30Na 2O–10BaO–30P 2O 5–(30− x)WO 3– xNb 2O 5 (5 < x < 25) decompose water vapor and generate hydrogen at 500 °C. The best decomposition performance...
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| Veröffentlicht in: | Journal of non-crystalline solids 2009-06, Vol.355 (16), p.960-964 |
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| container_title | Journal of non-crystalline solids |
| container_volume | 355 |
| creator | Mizusaki, S. Toyoda, Y. Nakayama, K. Nagata, Y. Ozawa, T.C. Noro, Y. Samata, H. |
| description | The performance of phosphate glasses as a catalyst for water decomposition and a proton conductor was investigated. Glasses with a composition of 30Na
2O–10BaO–30P
2O
5–(30−
x)WO
3–
xNb
2O
5 (5
<
x
<
25) decompose water vapor and generate hydrogen at 500
°C. The best decomposition performance was observed on a specimen with the Nb
2O
5 composition of
x
=
15. A part of hydrogen produced on the glass surface changes to protons by reducing W
6+ ions and penetrates into the glass. The electron is the dominant charge carrier in the electric conduction of W-rich glasses, whereas proton conduction is predominant in Nb-rich glasses in hydrogen atmosphere. A Raman scattering experiment revealed that Nb contributes to depolymerize the –P–O–P– chains in the phosphate glass producing non-bridging oxygen. A possible model was proposed for the water decomposition and proton conduction processes. |
| doi_str_mv | 10.1016/j.jnoncrysol.2009.04.012 |
| format | Article |
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2O–10BaO–30P
2O
5–(30−
x)WO
3–
xNb
2O
5 (5
<
x
<
25) decompose water vapor and generate hydrogen at 500
°C. The best decomposition performance was observed on a specimen with the Nb
2O
5 composition of
x
=
15. A part of hydrogen produced on the glass surface changes to protons by reducing W
6+ ions and penetrates into the glass. The electron is the dominant charge carrier in the electric conduction of W-rich glasses, whereas proton conduction is predominant in Nb-rich glasses in hydrogen atmosphere. A Raman scattering experiment revealed that Nb contributes to depolymerize the –P–O–P– chains in the phosphate glass producing non-bridging oxygen. A possible model was proposed for the water decomposition and proton conduction processes.</description><identifier>ISSN: 0022-3093</identifier><identifier>EISSN: 1873-4812</identifier><identifier>DOI: 10.1016/j.jnoncrysol.2009.04.012</identifier><identifier>CODEN: JNCSBJ</identifier><language>eng</language><publisher>Oxford: Elsevier B.V</publisher><subject>Adsorption ; Catalysis ; Chemistry ; Conductivity ; Exact sciences and technology ; General and physical chemistry ; Hydrogen in glass ; Oxidation reduction ; Phosphates ; Raman scattering ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; Water</subject><ispartof>Journal of non-crystalline solids, 2009-06, Vol.355 (16), p.960-964</ispartof><rights>2009</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c445t-56916c037fed1c6472d4d287de849748f67b748f7b2376d593d5320de54f1b453</citedby><cites>FETCH-LOGICAL-c445t-56916c037fed1c6472d4d287de849748f67b748f7b2376d593d5320de54f1b453</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jnoncrysol.2009.04.012$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21568201$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Mizusaki, S.</creatorcontrib><creatorcontrib>Toyoda, Y.</creatorcontrib><creatorcontrib>Nakayama, K.</creatorcontrib><creatorcontrib>Nagata, Y.</creatorcontrib><creatorcontrib>Ozawa, T.C.</creatorcontrib><creatorcontrib>Noro, Y.</creatorcontrib><creatorcontrib>Samata, H.</creatorcontrib><title>Catalysis and proton-conduction of novel phosphate glasses</title><title>Journal of non-crystalline solids</title><description>The performance of phosphate glasses as a catalyst for water decomposition and a proton conductor was investigated. Glasses with a composition of 30Na
2O–10BaO–30P
2O
5–(30−
x)WO
3–
xNb
2O
5 (5
<
x
<
25) decompose water vapor and generate hydrogen at 500
°C. The best decomposition performance was observed on a specimen with the Nb
2O
5 composition of
x
=
15. A part of hydrogen produced on the glass surface changes to protons by reducing W
6+ ions and penetrates into the glass. The electron is the dominant charge carrier in the electric conduction of W-rich glasses, whereas proton conduction is predominant in Nb-rich glasses in hydrogen atmosphere. A Raman scattering experiment revealed that Nb contributes to depolymerize the –P–O–P– chains in the phosphate glass producing non-bridging oxygen. A possible model was proposed for the water decomposition and proton conduction processes.</description><subject>Adsorption</subject><subject>Catalysis</subject><subject>Chemistry</subject><subject>Conductivity</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Hydrogen in glass</subject><subject>Oxidation reduction</subject><subject>Phosphates</subject><subject>Raman scattering</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>Water</subject><issn>0022-3093</issn><issn>1873-4812</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqFkEtPwzAQhC0EEqXwH3KBW8L6kdjhBhUvqRIXOFuu7VBXqV28aaX-e1IVwZG9zOWbnd0hpKBQUaDN7apaxRRt3mPqKwbQViAqoOyETKiSvBSKslMyAWCs5NDyc3KBuIJxJFcTcjczg-n3GLAw0RWbnIYUS5ui29ohpFikrohp5_tis0y4WZrBF5-9QfR4Sc4606O_-tEp-Xh6fJ-9lPO359fZ_by0QtRDWTctbSxw2XlHbSMkc8IxJZ1XopVCdY1cHEQuGJeNq1vuas7A-Vp0dCFqPiU3x73jcV9bj4NeB7S-7030aYuaC8lBQTOC6gjanBCz7_Qmh7XJe01BH8rSK_1Xlj6UpUHosazRev2TYdCavssm2oC_fkbrRjGgI_dw5Pz48C74rNEGH613IXs7aJfC_2HfLfWE5g</recordid><startdate>20090615</startdate><enddate>20090615</enddate><creator>Mizusaki, S.</creator><creator>Toyoda, Y.</creator><creator>Nakayama, K.</creator><creator>Nagata, Y.</creator><creator>Ozawa, T.C.</creator><creator>Noro, Y.</creator><creator>Samata, H.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20090615</creationdate><title>Catalysis and proton-conduction of novel phosphate glasses</title><author>Mizusaki, S. ; Toyoda, Y. ; Nakayama, K. ; Nagata, Y. ; Ozawa, T.C. ; Noro, Y. ; Samata, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c445t-56916c037fed1c6472d4d287de849748f67b748f7b2376d593d5320de54f1b453</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Adsorption</topic><topic>Catalysis</topic><topic>Chemistry</topic><topic>Conductivity</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Hydrogen in glass</topic><topic>Oxidation reduction</topic><topic>Phosphates</topic><topic>Raman scattering</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>Water</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mizusaki, S.</creatorcontrib><creatorcontrib>Toyoda, Y.</creatorcontrib><creatorcontrib>Nakayama, K.</creatorcontrib><creatorcontrib>Nagata, Y.</creatorcontrib><creatorcontrib>Ozawa, T.C.</creatorcontrib><creatorcontrib>Noro, Y.</creatorcontrib><creatorcontrib>Samata, H.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of non-crystalline solids</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mizusaki, S.</au><au>Toyoda, Y.</au><au>Nakayama, K.</au><au>Nagata, Y.</au><au>Ozawa, T.C.</au><au>Noro, Y.</au><au>Samata, H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Catalysis and proton-conduction of novel phosphate glasses</atitle><jtitle>Journal of non-crystalline solids</jtitle><date>2009-06-15</date><risdate>2009</risdate><volume>355</volume><issue>16</issue><spage>960</spage><epage>964</epage><pages>960-964</pages><issn>0022-3093</issn><eissn>1873-4812</eissn><coden>JNCSBJ</coden><abstract>The performance of phosphate glasses as a catalyst for water decomposition and a proton conductor was investigated. Glasses with a composition of 30Na
2O–10BaO–30P
2O
5–(30−
x)WO
3–
xNb
2O
5 (5
<
x
<
25) decompose water vapor and generate hydrogen at 500
°C. The best decomposition performance was observed on a specimen with the Nb
2O
5 composition of
x
=
15. A part of hydrogen produced on the glass surface changes to protons by reducing W
6+ ions and penetrates into the glass. The electron is the dominant charge carrier in the electric conduction of W-rich glasses, whereas proton conduction is predominant in Nb-rich glasses in hydrogen atmosphere. A Raman scattering experiment revealed that Nb contributes to depolymerize the –P–O–P– chains in the phosphate glass producing non-bridging oxygen. A possible model was proposed for the water decomposition and proton conduction processes.</abstract><cop>Oxford</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jnoncrysol.2009.04.012</doi><tpages>5</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Journal of non-crystalline solids, 2009-06, Vol.355 (16), p.960-964 |
| issn | 0022-3093 1873-4812 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Adsorption Catalysis Chemistry Conductivity Exact sciences and technology General and physical chemistry Hydrogen in glass Oxidation reduction Phosphates Raman scattering Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Water |
| title | Catalysis and proton-conduction of novel phosphate glasses |
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