Atomic Pillar Effect in PdxNbS2 To Boost Basal Plane Activity for Stable Hydrogen Evolution

doi:10.1021/acs.chemmater.9b00821

SIC OpenIR

	Atomic Pillar Effect in PdxNbS2 To Boost Basal Plane Activity for Stable Hydrogen Evolution
	Huang, Chong; Wan, Xin; Wang, Dong; Zhao, Wei; Bu, Kejun; Xu, Jijian; Huang, Xieyi; Bi, Qingyuan; Huang, Jian; Huang, Fuqiang
	2019-07-09
Source Publication	CHEMISTRY OF MATERIALS
ISSN	0897-4756
Volume	31 Issue:13 Pages:4726
Subtype	Article
Abstract	Exploring novel electrocatalysts with prominent performance is highly demanded for electrochemical hydrogen evolution. As one family member of layered transition-metal dichalcogenides (TMDs), metallic niobium disulfide (NbS2) with intrinsic basal plane activity might be a promising candidate once its electrical and structural characteristics are optimized. Here, we develop novel electrocatalysts by incorporating palladium (Pd) atoms into the van der Waals gaps of NbS2 to form new compounds PdxNbS2 (x = 0-0.23). On the basis of single crystal structure refinement and theoretical calculations, the Pd atoms act as atomic pillars to expand the interlayer spacing of NbS2 and boost the basal plane activity with a drop of Gibbs free energy for hydrogen adsorption to 0.06 eV on neighboring S atoms, resulting in more protons to adsorb and react. In addition, pillared Pd stabilizes the crystal structure by connecting the NbS2 interlayers with [PdS6] octahedra. All these merits endow Pd0.23NbS2 with superior electrochemical activity and durability, achieving 10 mA cm(-2) at a low overpotential of 157 mV with a negligible change in 12 h. This unique atomic pillar effect for optimizing the electrocatalytic performance of PdxNbS2 demonstrates a functional and powerful strategy to develop efficient TMD-based electrocatalysts.
DOI	10.1021/acs.chemmater.9b00821
Language	英语
WOS Research Area	Chemistry ; Materials Science
Publisher	AMER CHEMICAL SOC
Citation statistics	Cited Times:7[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/26985
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Huang, Chong,Wan, Xin,Wang, Dong,et al. Atomic Pillar Effect in PdxNbS2 To Boost Basal Plane Activity for Stable Hydrogen Evolution[J]. CHEMISTRY OF MATERIALS,2019,31(13):4726.
APA	Huang, Chong.,Wan, Xin.,Wang, Dong.,Zhao, Wei.,Bu, Kejun.,...&Huang, Fuqiang.(2019).Atomic Pillar Effect in PdxNbS2 To Boost Basal Plane Activity for Stable Hydrogen Evolution.CHEMISTRY OF MATERIALS,31(13),4726.
MLA	Huang, Chong,et al."Atomic Pillar Effect in PdxNbS2 To Boost Basal Plane Activity for Stable Hydrogen Evolution".CHEMISTRY OF MATERIALS 31.13(2019):4726.

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