A "competitive occupancy" strategy toward Co-N-4 single-atom catalysts embedded in 2D TiN/rGO sheets for highly efficient and stable aromatic nitroreduction

doi:10.1039/c9ta13615k

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	A "competitive occupancy" strategy toward Co-N-4 single-atom catalysts embedded in 2D TiN/rGO sheets for highly efficient and stable aromatic nitroreduction
	Gu, Y ; Wu, AP ; Wang, L ; Wang, DX ; Yan, HJ ; Yu, P ; Xie, Y ; Tian, CG ; Sun, FF ; Fu, HG
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2020
卷号	8 期号:9 页码:4807-4815
关键词	METAL HETEROSTRUCTURES HYDROGENATION GRAPHENE
ISSN号	2050-7488
DOI	10.1039/c9ta13615k
文献子类	期刊论文
英文摘要	Single-atom catalysts (SACs) have been promising in various catalytic fields, but the controllable synthesis of SACs with high stability remains challenging. Here, we show a robust strategy toward the fabrication of highly efficient and stable SACs based on the "competitive occupancy" of two metal (M) species on graphene oxide (GO). The abundant M-1 (Ti) species predominantly occupy more groups of GO, thereby leaving a tiny number of groups in the gaps of the M-1 species to combine with M-2 (Co2+, etc.) species. Consequently, this guarantees the formation of Co-N-4 SACs embedded in 2D TiN/rGO sheets during nitridation. Further, TiN can act as a "spacer" to prevent Co-N-4 from aggregation, thereby improving catalyst stability. Co-N-4/TiN-rGO exhibits outstanding catalytic performance for the fast conversion of highly concentrated aromatic nitro compounds (similar to 0.3-2 mM) into amino compounds and excellent recyclability, which is the best among reported catalysts. In contrast, TiN/rGO has no obvious activity, and Co4N-rGO prepared without Ti competition shows poor activity and stability, which indicates the vital role of Co-N-4 and TiN for obtaining the remarkable catalytic ability of Co-N-4/TiN-rGO. The reaction mechanism is also proposed based on theoretical calculations. The strategy can be used to design Ni (Fe, Cr, Cu)-based SACs.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32669]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Heilongjiang Univ, Key Lab Funct Inorgan Mat Chem, Minist Educ Peoples Republ China, Harbin 150080, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, SSRF, Shanghai 201204, Peoples R China 3.Harbin Engn Univ, Coll Mat Sci & Chem Engn, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China
推荐引用方式 GB/T 7714	Gu, Y,Wu, AP,Wang, L,et al. A "competitive occupancy" strategy toward Co-N-4 single-atom catalysts embedded in 2D TiN/rGO sheets for highly efficient and stable aromatic nitroreduction[J]. JOURNAL OF MATERIALS CHEMISTRY A,2020,8(9):4807-4815.
APA	Gu, Y.,Wu, AP.,Wang, L.,Wang, DX.,Yan, HJ.,...&Fu, HG.(2020).A "competitive occupancy" strategy toward Co-N-4 single-atom catalysts embedded in 2D TiN/rGO sheets for highly efficient and stable aromatic nitroreduction.JOURNAL OF MATERIALS CHEMISTRY A,8(9),4807-4815.
MLA	Gu, Y,et al."A "competitive occupancy" strategy toward Co-N-4 single-atom catalysts embedded in 2D TiN/rGO sheets for highly efficient and stable aromatic nitroreduction".JOURNAL OF MATERIALS CHEMISTRY A 8.9(2020):4807-4815.