Design of Au nanorods-based plasmonic catalyst in combination with nanohybrid Pd-rGO layer for boosting CO2 hydrogenation to formic acid under visible light irradiation
Design of Au nanorods-based plasmonic catalyst in combination with nanohybrid Pd-rGO layer for boosting CO2 hydrogenation to formic acid under visible light irradiation
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DOI：
10.1016/j.cattod.2022.06.010
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发表时间：
2022-06
期刊：
影响因子：
5.3
通讯作者：
Kenjirou Tamaki;Priyanka Verma;Takeharu Yoshii;Toru Shimojitosho;Yasutaka Kuwahara;K. Mori;Hiromi Yamashita
中科院分区：
文献类型：
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作者：
Kenjirou Tamaki;Priyanka Verma;Takeharu Yoshii;Toru Shimojitosho;Yasutaka Kuwahara;K. Mori;Hiromi Yamashita
近年来，从太阳能利用的角度来看，利用可见光至近红外光诱导的表面等离子体共振现象进行光催化反应的研究引起了广泛关注。表面等离子体激元共振（SPR）弛豫过程中产生的高能热电子注入反应底物分子，可以促进等离子体激元介导的催化反应。在本报告中，我们制备了Pd/Au NRs@rGO纳米催化剂，其中具有等离子体性质的Au纳米棒（NRs）被具有优异导电性的还原氧化石墨烯（rGO）层包围，并且Pd纳米颗粒（NPs）负载在Au NRs上以有效地将热电子传输到反应基底。采用HAADF-STEM、TEM、UV-vis、XRD、XAFS、ICP等手段对催化剂进行了表征。在可见光照射下考察了所制备催化剂在CO2光催化还原制甲酸反应中的适用性。在24 h内，光催化FA产率达到1.7 μmol，是黑暗条件下的2.7倍。在Pd/Au NRs@rGO催化剂中，Pd/Au NRs与rGO组合的SPR增强导致在可见光照射和室温条件下FA的上级产物产率。
In recent years, research on the use of surface plasmon resonance phenomena induced by visible to near-infrared light for photocatalytic reactions has attracted much attention from the viewpoint of solar energy utilization. It has been extensively researched that the plasmon-mediated catalytic reaction can be promoted due to the injection of energetic hot electrons originating during the relaxation process of the surface plasmon resonance (SPR) into the reaction substrate molecules. In this report, we have prepared Pd/Au NRs@rGO nanocatalyst in which Au nanorods (NRs) with plasmonic properties are surrounded by a layer of reduced graphene oxide (rGO) with excellent electrical conductivity, and Pd nanoparticles (NPs) are supported on the Au NRs to efficiently transport hot electrons to the reaction substrate. The successful synthesis of the catalyst was characterized by HAADF-STEM, TEM, UV–vis, XRD, XAFS, and ICP analysis. The applicability of the prepared catalyst was tested in the photocatalytic reduction of CO2to formic acid (FA) reaction under visible light irradiation. A photocatalytic FA yield of 1.7 μmol was obtained in 24 h, which was 2.7-fold higher than in dark reaction conditions. The SPR enhancement of Pd/Au NRs in combination with rGO in Pd/Au NRs@rGO catalyst led to the superior product yield of FA under visible light irradiation and room temperature conditions.