Chemical induced fragmentation of MOFs for highly efficient Ni-based hydrogen evolution catalysts

doi:10.1039/c7nh00193b

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	Chemical induced fragmentation of MOFs for highly efficient Ni-based hydrogen evolution catalysts
	Wang, Teng; Jin, Rumei; Wu, Yong; Zheng, Jie; Li, Xingguo
刊名	NANOSCALE HORIZONS
	2018-03-01
卷号	3 期号:2 页码:218-225
ISSN号	2055-6756
DOI	10.1039/c7nh00193b
英文摘要	A highly efficient catalyst for the hydrogen evolution reaction (HER) composed of Ni nanoparticles encapsulated in thin layers of N-doped carbon (Ni@NC) can be obtained by NH3 induced fragmentation of a Ni based MOF at mild temperature (450 degrees C). A mechanistic study shows that the high chemical reactivity of NH3 causes ammonolysis of the ligands and allows ligand removal well below their carbonization temperature. In conventional thermal decomposition in Ar, metal-ligand bond dissociation and ligand carbonization occurs in the same temperature region, resulting in a catalyst with high carbon content and much poorer HER performance. We further improve the HER performance by combining the NH3 induced fragmentation and destabilization of the Ni-MOF structure by low levels of Co substitution, which results in smaller, more uniform catalyst particles. Using the noble metal free HER catalyst, an overall solar-to-hydrogen efficiency of 7.9% is achieved in an electrolyzer driven by a commercial polycrystalline solar cell with an efficiency of 12.9%.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000433439100005
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42857]
专题	中国科学院化学研究所
通讯作者	Zheng, Jie; Li, Xingguo
作者单位	Peking Univ, Coll Chem & Mol Engn, BNLMS, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Wang, Teng,Jin, Rumei,Wu, Yong,et al. Chemical induced fragmentation of MOFs for highly efficient Ni-based hydrogen evolution catalysts[J]. NANOSCALE HORIZONS,2018,3(2):218-225.
APA	Wang, Teng,Jin, Rumei,Wu, Yong,Zheng, Jie,&Li, Xingguo.(2018).Chemical induced fragmentation of MOFs for highly efficient Ni-based hydrogen evolution catalysts.NANOSCALE HORIZONS,3(2),218-225.
MLA	Wang, Teng,et al."Chemical induced fragmentation of MOFs for highly efficient Ni-based hydrogen evolution catalysts".NANOSCALE HORIZONS 3.2(2018):218-225.