Article
Chemistry, Physical
Yang Wang, Sara. Rahimnejad, Wu-Ji Sun, Lan-Xin Li, Hao-Yu Zhang, Qiang Cao, Jing-Hui He
Summary: Fe1Cu2@MXene bimetallic catalysts are capable of efficiently catalyzing the electrocatalytic reduction of NO3- and achieving complete removal of low NO3- concentrations with high selectivity for NH3.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yongtao Wang, Peng Zhang, Xiaoyun Lin, Gong Zhang, Hui Gao, Qingzhen Wang, Zhi-Jian Zhao, Tuo Wang, Jinlong Gong
Summary: This research describes the design and fabrication of a copper-palladium (Cu-Pd) alloy nanocrystal catalyst that inhibits H2 and nitrite generation in electrolytes. The interfacial sites of Cu-Pd alloys enhance the adsorption energy and coverage of hydrogen species (H*) while increasing the reaction rate constant of NO2*-to-NO*. Under ambient conditions, optimal FE(NH3) is close to 100% at a wide pH range, with the solar-to-chemical conversion efficiency approaching 4.29%.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Physical
Xiaohui Yang, Rong Wang, Sha Wang, Cheng Song, Shun Lu, Ling Fang, Fengjun Yin, Hong Liu
Summary: A novel sequential active-site-switching (SASS) mechanism, based on the thermodynamic nature of bonding, is proposed for efficient electroreduction from NO3- into NH3. Experimental implementation on Cu/Fe-TiO2 shows that the SASS mechanism involves preferential adsorption of *NO3 on the in-plane Fe phase, followed by a switch towards the Cu/Fe hetero-phase interface to reduce into *NH3, and a further switch related to the *NH3 occurs towards the in-plane Cu phase. This SASS pathway endows Cu/Fe-TiO2 with significantly higher intrinsic activity compared to Cu-TiO2 and Fe-TiO2.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Multidisciplinary Sciences
Hardiljeet Kaur Boparai, Omneya El-Sharnouby, Denis M. O'Carroll
Summary: Aqueous-phase catalyzed reduction of organic contaminants using zerovalent copper nanoparticles (nCu(0)) and borohydride has shown promising results. The study examined the effects of Cu-0/Cun+ ratio, surface poisoning, and regeneration of Cu-0 sites on the dechlorination of 1,2-dichloroethane (1,2-DCA). The results suggest that synthesis parameters and groundwater solutes influence the catalytic activity of nCu(0)-borohydride.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Yunfan Fu, Shuo Wang, Yi Wang, Pengfei Wei, Jiaqi Shao, Tianfu Liu, Guoxiong Wang, Xinhe Bao
Summary: This study reports a high-performance Cu nanosheets catalyst that achieves a NH3 partial current density of 665 mA cm(-2) and NH3 yield rate of 1.41 mmol h(-1) cm(-2) in a flow cell at -0.59 V vs. reversible hydrogen electrode. The catalyst demonstrates a high stability for 700 h with an NH3 Faradaic efficiency of approximately 88% at 365 mA cm(-2). The high performance is attributed to the tandem interaction of Cu(100) and Cu(111) facets, promoting the crucial hydrogenation of *NO to *NOH for NH3 production.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Letter
Chemistry, Multidisciplinary
Jing Wang, Yian Wang, Chao Cai, Yushen Liu, Duojie Wu, Maoyu Wang, Menghao Li, Xianbin Wei, Minhua Shao, Meng Gu
Summary: The electrochemical nitrate reduction reaction (NO3RR) is a promising alternative route to produce ammonia (NH3) sustainably. Cu-doped Fe3O4 flakes are fabricated and demonstrated to be excellent catalysts for electrochemical conversion of NO3- to NH3, with high Faradaic efficiencies and NH3 yields. Theoretical calculations show that Cu doping facilitates the reaction thermodynamically. These results highlight the feasibility of improving NO3RR activity using heteroatom doping strategies.
Article
Engineering, Environmental
Yinghao Xue, Qihui Yu, Qian Ma, Yanyan Chen, Chuning Zhang, Wei Teng, Jianwei Fan, Wei-xian Zhang
Summary: Selective nitrate reduction and ammonia synthesis can be achieved at ambient conditions using atomic Cu sites anchored on micro-/mesoporous nitrogen-doped carbon, providing a potential solution for decentralized nitrate removal and utilization of nitrate-containing wastewater.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xue Zhao, Xiuxiu Jia, Yingnan He, Haibo Zhang, Xiaohai Zhou, Hucai Zhang, Shusheng Zhang, Yemin Dong, Xun Hu, Artem Kuklin, Glib Baryshnikov, Hans Agren, Guangzhi Hu
Summary: Novel electrochemical methods have been proven effective in converting nitrates into high value-added ammonia products. The presence of Cu and B elements plays a crucial role in the catalytic activity of BCN-Cu. These findings have potential implications in wastewater treatment and high-value chemical production.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Physical
Jeonghoon Lim, Chun-Yen Liu, Jinho Park, Yu-Hsuan Liu, Thomas P. Senftle, Seung Woo Lee, Marta C. Hatzell
Summary: The surface structure of Pd has a significant impact on the activity of nitrate and nitrite reduction, with cuboctahedral catalysts demonstrating the highest ammonia production in an alkaline electrolyte. This suggests that catalytic structural design plays a crucial role in enabling the selective reduction of nitrate to ammonia.
Article
Chemistry, Physical
Kaiwen Yang, Shuhe Han, Yuting Wang, Bin Zhang, Yifu Yu
Summary: A strategy for producing nitrogenous fertilizers using air and water is proposed to improve fertilizer utilization efficiency, reduce waste and environmental pollution. This method can be easily integrated into existing irrigation systems and has the potential to promote the development of smart agriculture.
Article
Nanoscience & Nanotechnology
Zhe Wang, Congcong Sun, Xiaoxia Bai, Zhenni Wang, Xin Yu, Xin Tong, Zheng Wang, Hui Zhang, Haili Pang, Lijun Zhou, Weiwei Wu, Yanping Liang, Ajit Khosla, Zhenhuan Zhao
Summary: In this study, a one-step solution processed synthetic strategy at low temperature was used to prepare carbonnanobelts-supported Cu and Pd nanoclusters. The prepared Cu-Pd/C nanobelts demonstrated higher activity for nitrate reduction reaction (NO3RR) compared to Cu/C nanobelts, while Cu/C nanobelts showed higher Faradaic efficiency (FE) for nitrite reduction reaction (NO2RR). Theoretical calculations revealed that Pd and Cu were responsible for hydrogen evolution reaction (HER) and NO3RR, respectively.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Limin Wu, Jiaqi Feng, Libing Zhang, Shunhan Jia, Xinning Song, Qinggong Zhu, Xinchen Kang, Xueqing Xing, Xiaofu Sun, Buxing Han
Summary: Zn-doped Cu nanosheets were designed and synthesized for the electroreduction of NO3- to NH3. The catalyst showed excellent performance with a maximum Faradaic efficiency of 98.4% and a high yield rate of 5.8 mol g-1 h-1.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yuhuan Cui, Anqi Dong, Yitong Zhou, Yanbin Qu, Ming Zhao, Zhili Wang, Qing Jiang
Summary: Electrochemical reduction of nitrate to ammonia (NH3) offers a promising strategy for green NH3 synthesis and balances the perturbed nitrogen cycle. However, current electrocatalytic nitrate reduction processes are still inefficient due to the lack of effective electrocatalysts. In this study, 3D nanoporous Cu/MnOx hybrids were reported as efficient and durable electrocatalysts for nitrate reduction reaction, achieving high NH3 yield rates and Faradic efficiency. The interface effect between Cu/MnOx interface was found to enhance the catalytic activity and selectivity. This work provides an approach to design advanced materials for NH3 production via electrochemical nitrate reduction.
Article
Environmental Sciences
Nurbek Nurlan, Ainash Akmanova, Shanawar Hamid, Woojin Lee
Summary: The presence of oxyanions in groundwater significantly affects the reactivity and selectivity of Cu-Pd-hematite bimetallic catalysts for NO3- reduction, making their successive application challenging.
Article
Engineering, Environmental
Sadeeq Ullah, Shiyong Wang, Changping Li, Amin Ullah Jan, Fei Zhan, Hafiz Muhammad Adeel Sharif, Qingling Liu, Gang Wang
Summary: This review focuses on the role of copper-based catalysts in the electrochemical conversion of nitrate to ammonia and identifies the factors that affect their performance. Strategies for enhancing catalytic efficiency and recent advancements in the design of copper-based electrocatalysts are also discussed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)