Promotional effect of surface plasmon resonance on direct formation of hydrogen peroxide from H2 and O2 over Pd/Graphene-Au nanorod catalytic system
Promotional effect of surface plasmon resonance on direct formation of hydrogen peroxide from H2 and O2 over Pd/Graphene-Au nanorod catalytic system
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DOI：
10.1016/j.jcat.2020.05.028
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发表时间：
2020-05
影响因子：
7.3
通讯作者：
Takeharu Yoshii;Yasutaka Kuwahara;K. Mori;H. Yamashita
中科院分区：
文献类型：
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作者：
Takeharu Yoshii;Yasutaka Kuwahara;K. Mori;H. Yamashita
本文报道了表面等离子体共振（SPR）对结构控制的Pd-Au催化体系中H2和O2直接生成H2 O2的促进作用。制备了还原氧化石墨烯（rGO）包覆Au纳米棒（NR）负载Pd纳米粒子的纳米复合催化剂，并通过多种表征技术对其结构进行了表征。在可见光照射下，H2和O2直接形成H2 O2时，H2 O2的产生大大增强。H2 O2分解实验和H2-D2交换反应表明，Au NRs的表面等离子体共振促进了H2在Pd NP表面的活化，从而有效地产生H2 O2.此外，rGO层不仅在催化反应中用作电子介体，而且还有助于在催化剂合成中控制Pd NP尺寸。
A promotional effect of surface plasmon resonance (SPR) on direct hydrogen peroxide (H2O2) formation from H2and O2over a structure-controlled Pd-Au catalytic system is reported herein. Pd NPs supported on reduced graphene oxide (rGO) layer-coated Au nanorod (NR) nanocomposite catalysts were synthesized, and the structure was confirmed by multiple characterization techniques. H2O2production is highly enhanced under visible light irradiation in the direct H2O2formation from H2and O2. The H2O2decomposition test and the H2-D2exchange reaction reveal that the SPR of Au NRs facilitates H2activation on the Pd NP surface, leading to efficient H2O2production. Furthermore, the rGO layer not only functions as an electron mediator in the catalytic reaction, but also contributes to the control of Pd NP sizes in the catalyst synthesis.