A "competitive occupancy" strategy toward Co-N-4 single-atom catalysts embedded in 2D TiN/rGO sheets for highly efficient and stable aromatic nitroreduction
文献类型：期刊论文
| 作者 | 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
 |
| 出版日期 | 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 |
| 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. |
入库方式： OAI收割
来源：上海应用物理研究所
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