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In Situ Clustering of Single-Atom Copper Precatalysts in a Metal- Organic Framework for Efficient Electrocatalytic Nitrate-to- Ammonia Reduction

文献类型：期刊论文

作者Xu, Yan-Tong2; Xie, Meng-Yuan2,3; Zhong, Huiqiong2; Cao, Yan1,2
刊名ACS CATALYSIS
出版日期2022-07-15
卷号12期号:14页码:8698-8706
关键词self-reconstruction metal-organic framework single-atom electrocatalytic ammonia synthesis nitrate electroreduction
ISSN号2155-5435
DOI10.1021/acscatal.2c020338698
通讯作者Cao, Yan(caoyan@ms.giec.ac.cn)
英文摘要When serving as a "precatalyst", metal-organic frameworks (MOF) usually incur uncontrollable framework collapse in electro-catalysis. Herein, we report an anticollapse MOF-supported single-atom Cu precatalyst for electrocatalytic nitrate-to-ammonia reduction reaction (NARR), which can be applied in the rechargeable ammonia energy storage (RAES) technology. In situ X-ray absorption spectroscopy (XAS) revealed the association of the formation of real catalytic sites with the in situ clustering of single-atom Cu during NARR. Notably, the noncollapse MOF can afford the confined space to prevent the excessive aggregation of Cu atoms, leading to uniform ultrasmall nanoclusters (ca. 4 nm). Moreover, it achieves a maximal Faradaic efficiency toward NH3 of 85.5%, a formation rate of NH3 of 66 mu mol h-1 cm-2, and a specific activity of 53.43 mgNH3 h-1 mgCu-1 in 5 mM NO3- solution. The specific activity is found to be at least 3.3 times higher than that of other reported Cu-based catalysts. Density function theory (DFT) calculation further confirms the size effect and the host-guest interaction in facilitating the NO3- activation and the reaction energy decrease. Besides, it also exhibits a high selectivity of ammonia-to-nitrate of 93.3%, displaying great potential in RAES technology.
WOS关键词CAUCHY WAVELET TRANSFORM ; OXIDATION ; XAFS ; CU
资助项目NSFC[22178339] ; China Postdoctoral Science Foundation[2021M690151] ; Special Research Assistant Program of the Chinese Academy of Sciences[1190000058] ; Hundred Talents Program (A) of Chinese Academy of Sciences ; Guangdong Basic and Applied Basic Research Foundation[2021A1515110069] ; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development[2021000037] ; Basic Research Program of Guangzhou City[202102020866]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000906883500001
出版者AMER CHEMICAL SOC
资助机构NSFC ; China Postdoctoral Science Foundation ; Special Research Assistant Program of the Chinese Academy of Sciences ; Hundred Talents Program (A) of Chinese Academy of Sciences ; Guangdong Basic and Applied Basic Research Foundation ; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development ; Basic Research Program of Guangzhou City
源URL[http://ir.giec.ac.cn/handle/344007/38168]  
专题中国科学院广州能源研究所
通讯作者Cao, Yan
作者单位1.Anhui Univ, Coll Chem & Chem Engn, Hefei 230601, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China
3.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215123, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Yan-Tong,Xie, Meng-Yuan,Zhong, Huiqiong,et al. In Situ Clustering of Single-Atom Copper Precatalysts in a Metal- Organic Framework for Efficient Electrocatalytic Nitrate-to- Ammonia Reduction[J]. ACS CATALYSIS,2022,12(14):8698-8706.
APA Xu, Yan-Tong,Xie, Meng-Yuan,Zhong, Huiqiong,&Cao, Yan.(2022).In Situ Clustering of Single-Atom Copper Precatalysts in a Metal- Organic Framework for Efficient Electrocatalytic Nitrate-to- Ammonia Reduction.ACS CATALYSIS,12(14),8698-8706.
MLA Xu, Yan-Tong,et al."In Situ Clustering of Single-Atom Copper Precatalysts in a Metal- Organic Framework for Efficient Electrocatalytic Nitrate-to- Ammonia Reduction".ACS CATALYSIS 12.14(2022):8698-8706.

入库方式： OAI收割

来源：广州能源研究所

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