Loading…

Photocatalytic formation of a gas permeable layer selectively deposited on supported metal nanoparticles for sintering-resistant thermal catalysis

Nanoparticle aggregation of supported metal catalysts at high temperatures is a serious problem that causes a drop in catalytic performance. This study investigates the protection of metal nanoparticles from sintering by selectively forming nanoscale SiO 2 shells on Pd supported on TiO 2 by ultravio...

Full description

Saved in:
Bibliographic Details
Published in:Nanoscale advances 2023-02, Vol.5 (4), p.1124-1132
Main Authors: Takabayashi, Ayato, Kishimoto, Fuminao, Tsuchiya, Hiroto, Mikami, Hitoshi, Takanabe, Kazuhiro
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c330t-8c7a998be3c8bd4b4d4b453e81bb38dbc367a1187758866f5d0a10af0cd818803
cites cdi_FETCH-LOGICAL-c330t-8c7a998be3c8bd4b4d4b453e81bb38dbc367a1187758866f5d0a10af0cd818803
container_end_page 1132
container_issue 4
container_start_page 1124
container_title Nanoscale advances
container_volume 5
creator Takabayashi, Ayato
Kishimoto, Fuminao
Tsuchiya, Hiroto
Mikami, Hitoshi
Takanabe, Kazuhiro
description Nanoparticle aggregation of supported metal catalysts at high temperatures is a serious problem that causes a drop in catalytic performance. This study investigates the protection of metal nanoparticles from sintering by selectively forming nanoscale SiO 2 shells on Pd supported on TiO 2 by ultraviolet (UV) light irradiation. The proton-coupled reduction reaction increases the local pH around Pd nanoparticles, resulting in hydrolysis of tetraethoxyorthosilicate (TEOS) in only the vicinity of the metal. An apparent quantum efficiency of only 0.6% is obtained for the Pd/TiO 2 catalyst in H 2 evolution from ethanol-containing water under 370 nm excitation light. Therefore, the pH of raw slurry solution should be precisely controlled to that slightly below the threshold value for the TEOS hydrolysis reaction before the photodeposition. Transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX) clearly show that the particle size of the Pd nanoparticles (∼40 nm) with the SiO 2 shell (∼20 nm) was almost unchanged by the high-temperature treatment at 900 °C in air, suggesting that the SiO 2 shell prevented thermal aggregation of Pd nanoparticles. The Pd/TiO 2 without SiO 2 shell decoration exhibited a drop in the number of active sites, which was likely due to aggregation of the Pd catalysts. However, the number of active sites on the Pd@SiO 2 /TiO 2 catalyst was maintained even after the catalyst was calcined at 900 °C. Consequently, the Pd@SiO 2 /TiO 2 catalyst maintained its catalytic performance for simulated exhaust gas purification even after treatment at 900 °C. This study presents a methodology to produce sintering-tolerant supported metal nanoparticles using the photocatalytic gas permeable layer fabrication method. This paper presents a new methodology to produce a sintering-resistant exhaust gas purification catalyst with ultrathin SiO 2 decoration on already supported Pd metal nanoparticles using a vacuum-free photocatalytic layer deposition method.
doi_str_mv 10.1039/d2na00703g
format article
fullrecord <record><control><sourceid>proquest_pubme</sourceid><recordid>TN_cdi_pubmed_primary_36798490</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2854427335</sourcerecordid><originalsourceid>FETCH-LOGICAL-c330t-8c7a998be3c8bd4b4d4b453e81bb38dbc367a1187758866f5d0a10af0cd818803</originalsourceid><addsrcrecordid>eNpVkktv1DAQgC1ERavSC3eQjwgpYMdO4lyQqr5Aqtoe4GxNnMmukWMH21tp_wa_GC9blnKw_JhvPo81JuQNZx85E_2nsfbAWMfE6gU5qRveVqwW7OWz9TE5S-kHY6zmUsquf0WORdv1SvbshPx6WIccDGRw22wNnUKcIdvgaZgo0BUkumCcEQaH1MEWI03o0GT7iG5LR1xCshlHWjLSZllC3G1mLD7qwYcFYtE6TDszTdZnjNavqojJpgw-07wu_kLvayinr8nRBC7h2dN8Sr5fX327-FLd3t98vTi_rYwQLFfKdND3akBh1DDKQe5GI1DxYRBqHEx5JHCuuq5Rqm2nZmTAGUzMjIorxcQp-bz3LpthxtGgzxGcXqKdIW51AKv_j3i71qvwqPu-blUvi-D9kyCGnxtMWc82GXQOPIZN0rVqpKw7IZqCftijJoaUIk6HazjTuz7qy_ru_E8fbwr87nlhB_Rv1wrwdg_EZA7Rfx9B_AaDaqfp</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2854427335</pqid></control><display><type>article</type><title>Photocatalytic formation of a gas permeable layer selectively deposited on supported metal nanoparticles for sintering-resistant thermal catalysis</title><source>PubMed Central</source><creator>Takabayashi, Ayato ; Kishimoto, Fuminao ; Tsuchiya, Hiroto ; Mikami, Hitoshi ; Takanabe, Kazuhiro</creator><creatorcontrib>Takabayashi, Ayato ; Kishimoto, Fuminao ; Tsuchiya, Hiroto ; Mikami, Hitoshi ; Takanabe, Kazuhiro</creatorcontrib><description>Nanoparticle aggregation of supported metal catalysts at high temperatures is a serious problem that causes a drop in catalytic performance. This study investigates the protection of metal nanoparticles from sintering by selectively forming nanoscale SiO 2 shells on Pd supported on TiO 2 by ultraviolet (UV) light irradiation. The proton-coupled reduction reaction increases the local pH around Pd nanoparticles, resulting in hydrolysis of tetraethoxyorthosilicate (TEOS) in only the vicinity of the metal. An apparent quantum efficiency of only 0.6% is obtained for the Pd/TiO 2 catalyst in H 2 evolution from ethanol-containing water under 370 nm excitation light. Therefore, the pH of raw slurry solution should be precisely controlled to that slightly below the threshold value for the TEOS hydrolysis reaction before the photodeposition. Transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX) clearly show that the particle size of the Pd nanoparticles (∼40 nm) with the SiO 2 shell (∼20 nm) was almost unchanged by the high-temperature treatment at 900 °C in air, suggesting that the SiO 2 shell prevented thermal aggregation of Pd nanoparticles. The Pd/TiO 2 without SiO 2 shell decoration exhibited a drop in the number of active sites, which was likely due to aggregation of the Pd catalysts. However, the number of active sites on the Pd@SiO 2 /TiO 2 catalyst was maintained even after the catalyst was calcined at 900 °C. Consequently, the Pd@SiO 2 /TiO 2 catalyst maintained its catalytic performance for simulated exhaust gas purification even after treatment at 900 °C. This study presents a methodology to produce sintering-tolerant supported metal nanoparticles using the photocatalytic gas permeable layer fabrication method. This paper presents a new methodology to produce a sintering-resistant exhaust gas purification catalyst with ultrathin SiO 2 decoration on already supported Pd metal nanoparticles using a vacuum-free photocatalytic layer deposition method.</description><identifier>ISSN: 2516-0230</identifier><identifier>EISSN: 2516-0230</identifier><identifier>DOI: 10.1039/d2na00703g</identifier><identifier>PMID: 36798490</identifier><language>eng</language><publisher>England: RSC</publisher><subject>Chemistry</subject><ispartof>Nanoscale advances, 2023-02, Vol.5 (4), p.1124-1132</ispartof><rights>This journal is © The Royal Society of Chemistry.</rights><rights>This journal is © The Royal Society of Chemistry 2023 RSC</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c330t-8c7a998be3c8bd4b4d4b453e81bb38dbc367a1187758866f5d0a10af0cd818803</citedby><cites>FETCH-LOGICAL-c330t-8c7a998be3c8bd4b4d4b453e81bb38dbc367a1187758866f5d0a10af0cd818803</cites><orcidid>0000-0001-5374-9451 ; 0000-0003-0426-5762</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC9926894/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC9926894/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,27924,27925,53791,53793</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/36798490$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Takabayashi, Ayato</creatorcontrib><creatorcontrib>Kishimoto, Fuminao</creatorcontrib><creatorcontrib>Tsuchiya, Hiroto</creatorcontrib><creatorcontrib>Mikami, Hitoshi</creatorcontrib><creatorcontrib>Takanabe, Kazuhiro</creatorcontrib><title>Photocatalytic formation of a gas permeable layer selectively deposited on supported metal nanoparticles for sintering-resistant thermal catalysis</title><title>Nanoscale advances</title><addtitle>Nanoscale Adv</addtitle><description>Nanoparticle aggregation of supported metal catalysts at high temperatures is a serious problem that causes a drop in catalytic performance. This study investigates the protection of metal nanoparticles from sintering by selectively forming nanoscale SiO 2 shells on Pd supported on TiO 2 by ultraviolet (UV) light irradiation. The proton-coupled reduction reaction increases the local pH around Pd nanoparticles, resulting in hydrolysis of tetraethoxyorthosilicate (TEOS) in only the vicinity of the metal. An apparent quantum efficiency of only 0.6% is obtained for the Pd/TiO 2 catalyst in H 2 evolution from ethanol-containing water under 370 nm excitation light. Therefore, the pH of raw slurry solution should be precisely controlled to that slightly below the threshold value for the TEOS hydrolysis reaction before the photodeposition. Transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX) clearly show that the particle size of the Pd nanoparticles (∼40 nm) with the SiO 2 shell (∼20 nm) was almost unchanged by the high-temperature treatment at 900 °C in air, suggesting that the SiO 2 shell prevented thermal aggregation of Pd nanoparticles. The Pd/TiO 2 without SiO 2 shell decoration exhibited a drop in the number of active sites, which was likely due to aggregation of the Pd catalysts. However, the number of active sites on the Pd@SiO 2 /TiO 2 catalyst was maintained even after the catalyst was calcined at 900 °C. Consequently, the Pd@SiO 2 /TiO 2 catalyst maintained its catalytic performance for simulated exhaust gas purification even after treatment at 900 °C. This study presents a methodology to produce sintering-tolerant supported metal nanoparticles using the photocatalytic gas permeable layer fabrication method. This paper presents a new methodology to produce a sintering-resistant exhaust gas purification catalyst with ultrathin SiO 2 decoration on already supported Pd metal nanoparticles using a vacuum-free photocatalytic layer deposition method.</description><subject>Chemistry</subject><issn>2516-0230</issn><issn>2516-0230</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNpVkktv1DAQgC1ERavSC3eQjwgpYMdO4lyQqr5Aqtoe4GxNnMmukWMH21tp_wa_GC9blnKw_JhvPo81JuQNZx85E_2nsfbAWMfE6gU5qRveVqwW7OWz9TE5S-kHY6zmUsquf0WORdv1SvbshPx6WIccDGRw22wNnUKcIdvgaZgo0BUkumCcEQaH1MEWI03o0GT7iG5LR1xCshlHWjLSZllC3G1mLD7qwYcFYtE6TDszTdZnjNavqojJpgw-07wu_kLvayinr8nRBC7h2dN8Sr5fX327-FLd3t98vTi_rYwQLFfKdND3akBh1DDKQe5GI1DxYRBqHEx5JHCuuq5Rqm2nZmTAGUzMjIorxcQp-bz3LpthxtGgzxGcXqKdIW51AKv_j3i71qvwqPu-blUvi-D9kyCGnxtMWc82GXQOPIZN0rVqpKw7IZqCftijJoaUIk6HazjTuz7qy_ru_E8fbwr87nlhB_Rv1wrwdg_EZA7Rfx9B_AaDaqfp</recordid><startdate>20230214</startdate><enddate>20230214</enddate><creator>Takabayashi, Ayato</creator><creator>Kishimoto, Fuminao</creator><creator>Tsuchiya, Hiroto</creator><creator>Mikami, Hitoshi</creator><creator>Takanabe, Kazuhiro</creator><general>RSC</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0001-5374-9451</orcidid><orcidid>https://orcid.org/0000-0003-0426-5762</orcidid></search><sort><creationdate>20230214</creationdate><title>Photocatalytic formation of a gas permeable layer selectively deposited on supported metal nanoparticles for sintering-resistant thermal catalysis</title><author>Takabayashi, Ayato ; Kishimoto, Fuminao ; Tsuchiya, Hiroto ; Mikami, Hitoshi ; Takanabe, Kazuhiro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c330t-8c7a998be3c8bd4b4d4b453e81bb38dbc367a1187758866f5d0a10af0cd818803</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Takabayashi, Ayato</creatorcontrib><creatorcontrib>Kishimoto, Fuminao</creatorcontrib><creatorcontrib>Tsuchiya, Hiroto</creatorcontrib><creatorcontrib>Mikami, Hitoshi</creatorcontrib><creatorcontrib>Takanabe, Kazuhiro</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Nanoscale advances</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Takabayashi, Ayato</au><au>Kishimoto, Fuminao</au><au>Tsuchiya, Hiroto</au><au>Mikami, Hitoshi</au><au>Takanabe, Kazuhiro</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photocatalytic formation of a gas permeable layer selectively deposited on supported metal nanoparticles for sintering-resistant thermal catalysis</atitle><jtitle>Nanoscale advances</jtitle><addtitle>Nanoscale Adv</addtitle><date>2023-02-14</date><risdate>2023</risdate><volume>5</volume><issue>4</issue><spage>1124</spage><epage>1132</epage><pages>1124-1132</pages><issn>2516-0230</issn><eissn>2516-0230</eissn><abstract>Nanoparticle aggregation of supported metal catalysts at high temperatures is a serious problem that causes a drop in catalytic performance. This study investigates the protection of metal nanoparticles from sintering by selectively forming nanoscale SiO 2 shells on Pd supported on TiO 2 by ultraviolet (UV) light irradiation. The proton-coupled reduction reaction increases the local pH around Pd nanoparticles, resulting in hydrolysis of tetraethoxyorthosilicate (TEOS) in only the vicinity of the metal. An apparent quantum efficiency of only 0.6% is obtained for the Pd/TiO 2 catalyst in H 2 evolution from ethanol-containing water under 370 nm excitation light. Therefore, the pH of raw slurry solution should be precisely controlled to that slightly below the threshold value for the TEOS hydrolysis reaction before the photodeposition. Transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX) clearly show that the particle size of the Pd nanoparticles (∼40 nm) with the SiO 2 shell (∼20 nm) was almost unchanged by the high-temperature treatment at 900 °C in air, suggesting that the SiO 2 shell prevented thermal aggregation of Pd nanoparticles. The Pd/TiO 2 without SiO 2 shell decoration exhibited a drop in the number of active sites, which was likely due to aggregation of the Pd catalysts. However, the number of active sites on the Pd@SiO 2 /TiO 2 catalyst was maintained even after the catalyst was calcined at 900 °C. Consequently, the Pd@SiO 2 /TiO 2 catalyst maintained its catalytic performance for simulated exhaust gas purification even after treatment at 900 °C. This study presents a methodology to produce sintering-tolerant supported metal nanoparticles using the photocatalytic gas permeable layer fabrication method. This paper presents a new methodology to produce a sintering-resistant exhaust gas purification catalyst with ultrathin SiO 2 decoration on already supported Pd metal nanoparticles using a vacuum-free photocatalytic layer deposition method.</abstract><cop>England</cop><pub>RSC</pub><pmid>36798490</pmid><doi>10.1039/d2na00703g</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-5374-9451</orcidid><orcidid>https://orcid.org/0000-0003-0426-5762</orcidid><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier ISSN: 2516-0230
ispartof Nanoscale advances, 2023-02, Vol.5 (4), p.1124-1132
issn 2516-0230
2516-0230
language eng
recordid cdi_pubmed_primary_36798490
source PubMed Central
subjects Chemistry
title Photocatalytic formation of a gas permeable layer selectively deposited on supported metal nanoparticles for sintering-resistant thermal catalysis
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-07T09%3A38%3A16IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_pubme&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Photocatalytic%20formation%20of%20a%20gas%20permeable%20layer%20selectively%20deposited%20on%20supported%20metal%20nanoparticles%20for%20sintering-resistant%20thermal%20catalysis&rft.jtitle=Nanoscale%20advances&rft.au=Takabayashi,%20Ayato&rft.date=2023-02-14&rft.volume=5&rft.issue=4&rft.spage=1124&rft.epage=1132&rft.pages=1124-1132&rft.issn=2516-0230&rft.eissn=2516-0230&rft_id=info:doi/10.1039/d2na00703g&rft_dat=%3Cproquest_pubme%3E2854427335%3C/proquest_pubme%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c330t-8c7a998be3c8bd4b4d4b453e81bb38dbc367a1187758866f5d0a10af0cd818803%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=2854427335&rft_id=info:pmid/36798490&rfr_iscdi=true