Galvanic replacement synthesis of Ag(x)Au(1–x)@CeO(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance

A galvanic replacement strategy has been successfully adopted to design Ag(x)Au(1–x)@CeO(2) core@shell nanospheres derived from Ag@CeO(2) ones. After etching using HAuCl(4), the Ag core was in situ replaced with Ag(x)Au(1–x) alloy nanoframes, and void spaces were left under the CeO(2) shell. Among t...

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Detalles Bibliográficos
Autores principales: Liu, Dapeng, Li, Wang, Feng, Xilan, Zhang, Yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2015
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5532536/
https://www.ncbi.nlm.nih.gov/pubmed/28808522
http://dx.doi.org/10.1039/c5sc02774h
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author Liu, Dapeng
Li, Wang
Feng, Xilan
Zhang, Yu
author_facet Liu, Dapeng
Li, Wang
Feng, Xilan
Zhang, Yu
author_sort Liu, Dapeng
collection PubMed
description A galvanic replacement strategy has been successfully adopted to design Ag(x)Au(1–x)@CeO(2) core@shell nanospheres derived from Ag@CeO(2) ones. After etching using HAuCl(4), the Ag core was in situ replaced with Ag(x)Au(1–x) alloy nanoframes, and void spaces were left under the CeO(2) shell. Among the as-prepared Ag(x)Au(1–x)@CeO(2) catalysts, Ag(0.64)Au(0.36)@CeO(2) shows the optimal catalytic performance, whose catalytic efficiency reaches even 2.5 times higher than our previously reported Pt@CeO(2) nanospheres in the catalytic reduction of 4-nitrophenol (4-NP) by ammonia borane (AB). Besides, Ag(0.64)Au(0.36)@CeO(2) also exhibits a much lower 100% conversion temperature of 120 °C for catalytic CO oxidation compared with the other samples.
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spelling pubmed-55325362017-08-14 Galvanic replacement synthesis of Ag(x)Au(1–x)@CeO(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance Liu, Dapeng Li, Wang Feng, Xilan Zhang, Yu Chem Sci Chemistry A galvanic replacement strategy has been successfully adopted to design Ag(x)Au(1–x)@CeO(2) core@shell nanospheres derived from Ag@CeO(2) ones. After etching using HAuCl(4), the Ag core was in situ replaced with Ag(x)Au(1–x) alloy nanoframes, and void spaces were left under the CeO(2) shell. Among the as-prepared Ag(x)Au(1–x)@CeO(2) catalysts, Ag(0.64)Au(0.36)@CeO(2) shows the optimal catalytic performance, whose catalytic efficiency reaches even 2.5 times higher than our previously reported Pt@CeO(2) nanospheres in the catalytic reduction of 4-nitrophenol (4-NP) by ammonia borane (AB). Besides, Ag(0.64)Au(0.36)@CeO(2) also exhibits a much lower 100% conversion temperature of 120 °C for catalytic CO oxidation compared with the other samples. Royal Society of Chemistry 2015-12-01 2015-09-07 /pmc/articles/PMC5532536/ /pubmed/28808522 http://dx.doi.org/10.1039/c5sc02774h Text en This journal is © The Royal Society of Chemistry 2015 http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 Unported License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Chemistry
Liu, Dapeng
Li, Wang
Feng, Xilan
Zhang, Yu
Galvanic replacement synthesis of Ag(x)Au(1–x)@CeO(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance
title Galvanic replacement synthesis of Ag(x)Au(1–x)@CeO(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance
title_full Galvanic replacement synthesis of Ag(x)Au(1–x)@CeO(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance
title_fullStr Galvanic replacement synthesis of Ag(x)Au(1–x)@CeO(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance
title_full_unstemmed Galvanic replacement synthesis of Ag(x)Au(1–x)@CeO(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance
title_short Galvanic replacement synthesis of Ag(x)Au(1–x)@CeO(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance
title_sort galvanic replacement synthesis of ag(x)au(1–x)@ceo(2) (0 ≤ x ≤ 1) core@shell nanospheres with greatly enhanced catalytic performance
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5532536/
https://www.ncbi.nlm.nih.gov/pubmed/28808522
http://dx.doi.org/10.1039/c5sc02774h
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AT fengxilan galvanicreplacementsynthesisofagxau1xceo20x1coreshellnanosphereswithgreatlyenhancedcatalyticperformance
AT zhangyu galvanicreplacementsynthesisofagxau1xceo20x1coreshellnanosphereswithgreatlyenhancedcatalyticperformance

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