Enhancement of plasmonic activity by Pt/Ag bimetallic nanocatalyst supported on mesoporous silica in the hydrogen production from hydrogen storage material

被引：104
作者：
Verma, Priyanka [1 ]
Yuan, Kaile [1 ]
Kuwahara, Yasutaka [1 ,2 ]
Mori, Kohsuke [1 ,2 ,3 ]
Yamashita, Hiromi [1 ,2 ]
机构：
[1] Osaka Univ, Grad Sch Engn, Div Div Mat & Mfg Sci, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan
[2] Kyoto Univ, Unit Elements Strategy Initiat Catalysts & Batter, Kyoto 6068501, Japan
[3] JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 3320012, Japan
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2018年 / 223卷
基金：
日本学术振兴会;
关键词：
Plasmonic catalyst; Bimetallic nanoparticles; Mesoporous silica; Hydrogen production; Ammonia borane; SILVER NANOPARTICLES; CATALYTIC-ACTIVITY; AMMONIA BORANE; NANOSTRUCTURES; SOLAR; PD; PHOTOCATALYSIS; CONVERSION; RESONANCE; NANOBOXES;
D O I：
10.1016/j.apcatb.2017.05.017
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Recent advancements in plasmonic catalysis have witnessed rapid developments in solar-to-chemical energy conversion utilizing Ag, Au and Cu metal nanoparticles (NPs). In this study, visible light responsive bimetallic Pt/Ag nanocatalyst supported on mesoporous silica, was successfully prepared by a two-step method viz. MW assisted alcohol reduction, followed by Pt deposition by the assistance of localized surface plasmon resonance (LSPR) effect of Ag NPs. The obtained catalysts were characterized by UV-vis, transmission electron microscopy (TEM), XAFS, XPS and N-2-physisorption measurement studies. The performance of prepared catalysts was explored for the visible light enhanced catalytic activity in the hydrogen (H-2) production from ammonia borane (NH3-BH3: AB). A great enhancement for Pt(0.25)/Ag/SBA-15 (0.25 wt% of Pt on 1.0 wt% of Ag) was observed by a factor of 2.8, which is highest among our previously reported results of spherical bimetallic NPs. A plausible photocatalytic and charge separation mechanism has been proposed to envisage the tentative reaction pathway. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：10 / 15
页数：6
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