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CAS OpenIR  > 中科院上海应用物理研究所2011-2017年  > 期刊论文
题名:
Switchable CO2 electroreduction via engineering active phases of Pd nanoparticles
作者: Gao, DF; Zhou, H; Cai, F; Wang, DN; Hu, YF; Jiang, B; Cai, WB; Chen, XQ; Si, R; Yang, F; Miao, S; Wang, JG; Wang, GX; Bao, XH
刊名: NANO RESEARCH
出版日期: 2017
卷号: 10, 期号:6, 页码:2181-2191
关键词: carbon-dioxide electroreduction ; Pd nanoparticles ; active phase ; selectivity fluctuation
DOI: 10.1007/s12274-017-1514-6
文章类型: 期刊论文
英文摘要: Active-phase engineering is regularly utilized to tune the selectivity of metal nanoparticles (NPs) in heterogeneous catalysis. However, the lack of understanding of the active phase in electrocatalysis has hampered the development of efficient catalysts for CO2 electroreduction. Herein, we report the systematic engineering of active phases of Pd NPs, which are exploited to select reaction pathways for CO2 electroreduction. In situ X-ray absorption spectroscopy, in situ attenuated total reflection-infrared spectroscopy, and density functional theory calculations suggest that the formation of a hydrogen-adsorbed Pd surface on a mixture of the a-and a-phases of a palladium-hydride core (alpha+beta PdHx@PdHx) above -0.2 V (vs. a reversible hydrogen electrode) facilitates formate production via the HCOO* intermediate, whereas the formation of a metallic Pd surface on the a-phase Pd hydride core (beta PdHx@Pd) below -0.5 V promotes CO production via the COOH* intermediate. The main product, which is either formate or CO, can be selectively produced with high Faradaic efficiencies (> 90%) and mass activities in the potential window of 0.05 to -0.9 V with scalable application demonstration.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000401320700030
ISSN号: 1998-0124
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27464
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Gao, DF,Zhou, H,Cai, F,et al. Switchable CO2 electroreduction via engineering active phases of Pd nanoparticles[J]. NANO RESEARCH,2017-01-01,10(6):2181-2191.
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