Enhanced Stability of Immobilized Platinum Nanoparticles through Nitrogen Heteroatoms on Doped Carbon Supports

IMR OpenIR

	Enhanced Stability of Immobilized Platinum Nanoparticles through Nitrogen Heteroatoms on Doped Carbon Supports
	Shi, Wen; Wu, Kuang-Hsu; Xu, Junyuan; Zhang, Qiang; Zhang, Bingsen; Su, Dang Sheng; Zhang, BS; Su, DS (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
	2017-10-24
发表期刊	AMER CHEMICAL SOC
ISSN	0897-4756
卷号	29 期号:20 页码:8670-8678
摘要	Catalysts in the form of dispersed platinum nanoparticles (Pt NPs) immobilized on carbon usually suffer from deactivation through sintering under reaction conditions. In this contribution, we report the enhanced stability of highly dispersed Pt NPs on surface-modified carbon nanotubes (CNTs) against thermal and electrochemical sintering by N heteroatoms in the N-doped carbon support. The improved antisintering property of Pt NPs under thermal condition is characterized by in situ transmission electron microscopy (TEM), while the stability in electrochemical methanol oxidation reaction (MOR) is further examined at identical location (IL) using an advanced IL-TEM technique. A correlation of the Pt NP growth with the electrochemical surface area (ECSA) and the mass activity in MOR has been inferred. Our results indicate that both the surface oxygen groups and nitrogen-doped species are responsible for the fine dispersion of Pt NPs on the surface-modified CNTs, while the Pt NPs can be effectively stabilized under thermal and electrochemical conditions through the strong metal-support interaction via N heteroatoms. We further reveal that the mass activity of Pt NP is closely associated with the ECSA rather than directly affected by N-doping to CNTs.; Catalysts in the form of dispersed platinum nanoparticles (Pt NPs) immobilized on carbon usually suffer from deactivation through sintering under reaction conditions. In this contribution, we report the enhanced stability of highly dispersed Pt NPs on surface-modified carbon nanotubes (CNTs) against thermal and electrochemical sintering by N heteroatoms in the N-doped carbon support. The improved antisintering property of Pt NPs under thermal condition is characterized by in situ transmission electron microscopy (TEM), while the stability in electrochemical methanol oxidation reaction (MOR) is further examined at identical location (IL) using an advanced IL-TEM technique. A correlation of the Pt NP growth with the electrochemical surface area (ECSA) and the mass activity in MOR has been inferred. Our results indicate that both the surface oxygen groups and nitrogen-doped species are responsible for the fine dispersion of Pt NPs on the surface-modified CNTs, while the Pt NPs can be effectively stabilized under thermal and electrochemical conditions through the strong metal-support interaction via N heteroatoms. We further reveal that the mass activity of Pt NP is closely associated with the ECSA rather than directly affected by N-doping to CNTs.
部门归属	[shi, wen ; wu, kuang-hsu ; zhang, bingsen ; su, dang sheng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china ; [wu, kuang-hsu] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china ; [xu, junyuan] int iberian nanotechnol lab, ave mestre jose veiga, p-4715330 braga, portugal ; [zhang, qiang] tsinghua univ, dept chem engn, beijing key lab green chem react engn & technol, beijing 100084, peoples r china
学科领域	Chemistry, Physical ; Materials Science, Multidisciplinary
资助者	National Natural Science Foundation of China [91545119, 21773269]; Youth Innovation Promotion Association CAS [2015152]; Joint Foundation of Liaoning Province National Science Foundation; Shenyang National Laboratory for Materials Science [2015021011]; Chinese Academy of Sciences [XDA09030103]
收录类别	SCI
语种	英语
WOS记录号	WOS:000413884900014
引用统计	被引频次：54[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79033
专题	中国科学院金属研究所
通讯作者	Zhang, BS; Su, DS (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Shi, Wen,Wu, Kuang-Hsu,Xu, Junyuan,et al. Enhanced Stability of Immobilized Platinum Nanoparticles through Nitrogen Heteroatoms on Doped Carbon Supports[J]. AMER CHEMICAL SOC,2017,29(20):8670-8678.
APA	Shi, Wen.,Wu, Kuang-Hsu.,Xu, Junyuan.,Zhang, Qiang.,Zhang, Bingsen.,...&Su, DS .(2017).Enhanced Stability of Immobilized Platinum Nanoparticles through Nitrogen Heteroatoms on Doped Carbon Supports.AMER CHEMICAL SOC,29(20),8670-8678.
MLA	Shi, Wen,et al."Enhanced Stability of Immobilized Platinum Nanoparticles through Nitrogen Heteroatoms on Doped Carbon Supports".AMER CHEMICAL SOC 29.20(2017):8670-8678.