Efficient Electroreduction of Nitrate into Ammonia at Ultralow Concentrations Via an Enrichment Effect

Song，Zhimin1,2; Liu，Yan1; Zhong，Yongzhi1; Guo，Qing2; Zeng，Jie1; Geng，Zhigang1

2022

10.1002/adma.202204306

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

The electroreduction of nitrate (NO) pollutants to ammonia (NH) offers an alternative approach for both wastewater treatment and NH synthesis. Numerous electrocatalysts have been reported for the electroreduction of NO to NH, but most of them demonstrate poor performance at ultralow NO concentrations. In this study, a Cu-based catalyst for electroreduction of NO at ultralow concentrations is developed by encapsulating Cu nanoparticles in a porous carbon framework (Cu@C). At −0.3 V vs reversible hydrogen electrode (RHE), Cu@C achieves Faradaic efficiency for NH of 72.0% with 1 × 10 m NO, which is 3.6 times higher than that of Cu nanoparticles. Notably, at −0.9 V vs RHE, the yield rate of NH for Cu@C is 469.5 µg h cm, which is the highest value reported for electrocatalysts with 1 × 10 m NO. An investigation of the mechanism reveals that NO can be concentrated owing to the enrichment effect of the porous carbon framework in Cu@C, thereby facilitating the mass transfer of NO for efficient electroreduction into NH at ultralow concentrations.

Cu electrocatalysts enrichment effect NO 3− electroreduction porous carbon frameworks

SCI ; EI

英语

NI论文

其他

National Natural Science Foundation of China["92061111","U1932146","U19A2015"] ; National Science Fund for Distinguished Young Scholars[21925204] ; National Key Research and Development Program of China["2021YFA1500500","2019YFA0405600"] ; China Postdoctoral Program for Innovative Talents[BX20200324] ; Provincial Key Research and Development Program of Anhui[202004a05020074] ; CAS project for young scientists in basic research[YSBR-022] ; K. C. Wong Education[GJTD-2020-15] ; DNL Cooperation Fund, CAS[DNL202003]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000837009100001

WILEY-V C H VERLAG GMBH

20223212551218

Ammonia ; Carbon ; Copper ; Electrolysis ; Electrolytic reduction ; Mass transfer ; Nanoparticles ; Nitrates ; Porous materials ; Wastewater treatment

Industrial Wastes Treatment and Disposal:452.4 ; Ore Treatment:533.1 ; Copper:544.1 ; Mass Transfer:641.3 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Solid State Physics:933 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85135509064

Scopus

1.Hefei National Research Center for Physical Sciences at the Microscale,Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences,Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes,Department of Chemical Physics,University of Science and Technology of China,Hefei,Anhui,230026,China
2.Department of Chemistry,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Song，Zhimin,Liu，Yan,Zhong，Yongzhi,et al. Efficient Electroreduction of Nitrate into Ammonia at Ultralow Concentrations Via an Enrichment Effect[J]. ADVANCED MATERIALS,2022,34.

Song，Zhimin,Liu，Yan,Zhong，Yongzhi,Guo，Qing,Zeng，Jie,&Geng，Zhigang.(2022).Efficient Electroreduction of Nitrate into Ammonia at Ultralow Concentrations Via an Enrichment Effect.ADVANCED MATERIALS,34.

Song，Zhimin,et al."Efficient Electroreduction of Nitrate into Ammonia at Ultralow Concentrations Via an Enrichment Effect".ADVANCED MATERIALS 34(2022).