Switchable CO2 electroreduction via engineering active phases of Pd nanoparticles
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
2017
发表期刊NANO RESEARCH
ISSN1998-0124
卷号10期号:6页码:2181-2191
文章类型期刊论文
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.
关键词Carbon-dioxide Electroreduction Pd Nanoparticles Active Phase Selectivity Fluctuation
DOI10.1007/s12274-017-1514-6
收录类别SCI
语种英语
WOS记录号WOS:000401320700030
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27464
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Gao, DF,Zhou, H,Cai, F,et al. Switchable CO2 electroreduction via engineering active phases of Pd nanoparticles[J]. NANO RESEARCH,2017,10(6):2181-2191.
APA Gao, DF.,Zhou, H.,Cai, F.,Wang, DN.,Hu, YF.,...&Bao, XH.(2017).Switchable CO2 electroreduction via engineering active phases of Pd nanoparticles.NANO RESEARCH,10(6),2181-2191.
MLA Gao, DF,et al."Switchable CO2 electroreduction via engineering active phases of Pd nanoparticles".NANO RESEARCH 10.6(2017):2181-2191.
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