Efficient electrocatalytic nitrogen reduction to ammonia with aqueous silver nanodots

doi:10.1038/s42004-021-00449-7

HFCAS OpenIR

	Efficient electrocatalytic nitrogen reduction to ammonia with aqueous silver nanodots
	Li, Wenyi1,2 ; Li, Ke 1; Ye, Yixing1 ; Zhang, Shengbo 1; Liu, Yanyan1,2 ; Wang, Guozhong1 ; Liang, Changhao1 ; Zhang, Haimin 1; Zhao, Huijun 3
	2021-12-29
发表期刊	COMMUNICATIONS CHEMISTRY
ISSN	2399-3669
通讯作者	Liang, Changhao(chliang@issp.ac.cn) ; Zhang, Haimin(zhanghm@issp.ac.cn)
摘要	The electrocatalytic nitrogen (N-2) reduction reaction (NRR) relies on the development of highly efficient electrocatalysts and electrocatalysis systems. Herein, we report a non-loading electrocatalysis system, where the electrocatalysts are dispersed in aqueous solution rather than loading them on electrode substrates. The system consists of aqueous Ag nanodots (AgNDs) as the catalyst and metallic titanium (Ti) mesh as the current collector for electrocatalytic NRR. The as-synthesized AgNDs, homogeneously dispersed in 0.1 M Na2SO4 solution (pH = 10.5), can achieve an NH3 yield rate of 600.4 +/- 23.0 mu g h(-1) mg(Ag)(-1) with a faradaic efficiency (FE) of 10.1 +/- 0.7% at -0.25 V (vs. RHE). The FE can be further improved to be 20.1 +/- 0.9% at the same potential by using Ti mesh modified with oxygen vacancy-rich TiO2 nanosheets as the current collector. Utilizing the aqueous AgNDs catalyst, a Ti plate based two-electrode configured flow-type electrochemical reactor was developed to achieve an NH3 yield rate of 804.5 +/- 30.6 mu g h(-1) mg(Ag)(-1) with a FE of 8.2 +/- 0.5% at a voltage of -1.8 V. The designed non-loading electrocatalysis system takes full advantage of the AgNDs' active sites for N-2 adsorption and activation, following an alternative hydrogenation mechanism revealed by theoretical calculations.
DOI	10.1038/s42004-021-00449-7
关键词[WOS]	HYDROGEN-EVOLUTION REACTION ; TOTAL-ENERGY CALCULATIONS ; N-2 REDUCTION ; QUANTUM DOTS ; CATALYSTS ; DIOXIDE ; DESIGN ; ELECTROREDUCTION ; NANOSHEETS ; FIXATION
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of China[51872292] ; Natural Science Foundation of China[51571186] ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China
项目资助者	Natural Science Foundation of China ; CAS/SAFEA International Partnership Program for Creative Research Teams of Chinese Academy of Sciences, China
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000613476600001
出版者	NATURE RESEARCH
引用统计	被引频次：44[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/119684
专题	中国科学院合肥物质科学研究院
通讯作者	Liang, Changhao; Zhang, Haimin
作者单位	1.Chinese Acad Sci, Anhui Key Lab Nanomat & Nanotechnol, CAS Ctr Excellence Nanosci,Inst Solid State Phys, HFIPS,Key Lab Mat Phys,Ctr Environm & Energy Nano, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Griffith Univ, Ctr Clean Environm & Energy, Gold Coast Campus, Griffith, Qld, Australia
推荐引用方式 GB/T 7714	Li, Wenyi,Li, Ke,Ye, Yixing,et al. Efficient electrocatalytic nitrogen reduction to ammonia with aqueous silver nanodots[J]. COMMUNICATIONS CHEMISTRY,2021,4.
APA	Li, Wenyi.,Li, Ke.,Ye, Yixing.,Zhang, Shengbo.,Liu, Yanyan.,...&Zhao, Huijun.(2021).Efficient electrocatalytic nitrogen reduction to ammonia with aqueous silver nanodots.COMMUNICATIONS CHEMISTRY,4.
MLA	Li, Wenyi,et al."Efficient electrocatalytic nitrogen reduction to ammonia with aqueous silver nanodots".COMMUNICATIONS CHEMISTRY 4(2021).