Copper nanocrystals anchored on an O-rich carbonized corn gel for nitrogen electroreduction to ammonia

2020 ◽  
Vol 7 (19) ◽  
pp. 3555-3560
Author(s):  
Chang Li ◽  
Shengbo Zhang ◽  
Zhenhua Ding ◽  
Hongjian Zhou ◽  
Guozhong Wang ◽  
...  
Keyword(s):  
Faradaic Efficiency ◽  
Yield Rate

Copper nanocrystals anchored on an O-rich carbonized corn gel for electrochemical N2 fixation to NH3 with a faradaic efficiency of 25.89% and an NH3 yield rate of 1514 μg h−1 mgCu−1 at −0.3 V versus an RHE in 0.1 M Na2SO4.

scholarly journals Efficient electrocatalytic nitrogen reduction to ammonia with aqueous silver nanodots

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Wenyi Li ◽  
Ke Li ◽  
Yixing Ye ◽  
Shengbo Zhang ◽  
Yanyan Liu ◽  
...  
Keyword(s):  
Active Sites ◽  
Theoretical Calculations ◽  
Current Collector ◽  
Electrochemical Reactor ◽  
Reduction Reaction ◽  
Solution Ph ◽  
Faradaic Efficiency ◽  
Yield Rate ◽  
Silver Nanodots ◽  
Ti Mesh

AbstractThe electrocatalytic nitrogen (N2) 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 μg h−1 mgAg−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 μg h−1 mgAg−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 N2 adsorption and activation, following an alternative hydrogenation mechanism revealed by theoretical calculations.

Boron and nitrogen dual-doped carbon nanospheres for efficient electrochemical reduction of N2 to NH3

2020 ◽  
Vol 56 (3) ◽  
pp. 446-449 ◽  
Author(s):  
Shenglin Xiao ◽  
Fang Luo ◽  
Hao Hu ◽  
Zehui Yang
Keyword(s):  
Electrochemical Reduction ◽  
Reduction Reaction ◽  
Carbon Nanospheres ◽  
Faradaic Efficiency ◽  
Nitrogen Reduction ◽  
Yield Rate ◽  
Acidic Electrolyte

Boron and nitrogen dual-doped carbon nanospheres show exceptional nitrogen reduction reaction activity, with an NH3 yield rate of 15.7 μgNH3 h−1 mgcat.−1 and Faradaic efficiency of 8.1% at −0.4 V vs. RHE in acidic electrolyte.

Bi nanodendrites for efficient electrocatalytic N2 fixation to NH3 under ambient conditions

2020 ◽  
Vol 56 (14) ◽  
pp. 2107-2110 ◽  
Author(s):  
Fengyi Wang ◽  
Xu Lv ◽  
Xiaojuan Zhu ◽  
Juan Du ◽  
Siyu Lu ◽  
...  
Keyword(s):  
N2 Fixation ◽  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
Yield Rate

Bi nanodendrite acts as an efficient electrocatalyst for ambient N2-to-NH3 with NH3 yield rate of 25.86 μg h−1 mg−1cat. and faradaic efficiency of 10.8% at −0.60 V and −0.55 V versus RHE, respectively.

Ag nanosheets for efficient electrocatalytic N2 fixation to NH3 under ambient conditions

2018 ◽  
Vol 54 (81) ◽  
pp. 11427-11430 ◽  
Author(s):  
Hehan Huang ◽  
Li Xia ◽  
Xifeng Shi ◽  
Abdullah M. Asiri ◽  
Xuping Sun
Keyword(s):  
N2 Fixation ◽  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
Yield Rate ◽  
Highly Active

An Ag nanosheet acts as a highly active electrocatalyst for N2-to-NH3 fixation. In 0.1 M HCl, this catalyst attains a high Faradaic efficiency of 4.8% and a NH3 yield rate of 4.62 × 10−11 mol s−1 cm−2 at −0.60 V vs. RHE.

scholarly journals Electrochemical ammonia synthesis via nitrate reduction on Fe single atom catalyst

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhen-Yu Wu ◽  
Mohammadreza Karamad ◽  
Xue Yong ◽  
Qizheng Huang ◽  
David A. Cullen ◽  
...  
Keyword(s):  
Nitrate Reduction ◽  
Density Functional ◽  
Ammonia Synthesis ◽  
Reaction Pathway ◽  
Density Functional Theory Calculations ◽  
Single Atom ◽  
Functional Theory ◽  
Faradaic Efficiency ◽  
Yield Rate ◽  
Water Pollutant

AbstractElectrochemically converting nitrate, a widespread water pollutant, back to valuable ammonia is a green and delocalized route for ammonia synthesis, and can be an appealing and supplementary alternative to the Haber-Bosch process. However, as there are other nitrate reduction pathways present, selectively guiding the reaction pathway towards ammonia is currently challenged by the lack of efficient catalysts. Here we report a selective and active nitrate reduction to ammonia on Fe single atom catalyst, with a maximal ammonia Faradaic efficiency of ~ 75% and a yield rate of up to ~ 20,000 μg h−1 mgcat.−1 (0.46 mmol h−1 cm−2). Our Fe single atom catalyst can effectively prevent the N-N coupling step required for N2 due to the lack of neighboring metal sites, promoting ammonia product selectivity. Density functional theory calculations reveal the reaction mechanisms and the potential limiting steps for nitrate reduction on atomically dispersed Fe sites.

A perovskite La2Ti2O7nanosheet as an efficient electrocatalyst for artificial N2fixation to NH3in acidic media

2019 ◽  
Vol 55 (45) ◽  
pp. 6401-6404 ◽  
Author(s):  
Jiali Yu ◽  
Chengbo Li ◽  
Bingyue Li ◽  
Xiaojuan Zhu ◽  
Rong Zhang ◽  
...  
Keyword(s):  
Acidic Media ◽  
Faradaic Efficiency ◽  
Yield Rate

A perovskite La2Ti2O7nanosheet acts as an efficient electrocatalyst toward N2-to-NH3fixation, achieving a NH3yield rate of 25.15 μg h−1mgcat.−1and a faradaic efficiency of 4.55%.

Dendritic Cu: a high-efficiency electrocatalyst for N2 fixation to NH3 under ambient conditions

2019 ◽  
Vol 55 (96) ◽  
pp. 14474-14477 ◽  
Author(s):  
Chengbo Li ◽  
Shiyong Mou ◽  
Xiaojuan Zhu ◽  
Fengyi Wang ◽  
Yuting Wang ◽  
...  
Keyword(s):  
N2 Fixation ◽  
High Efficiency ◽  
Reversible Hydrogen Electrode ◽  
Ambient Conditions ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Yield Rate

Dendritic Cu behaves as an efficient electrocatalyst for ambient N2-to-NH3 fixation with a high Faradaic efficiency of 15.12% and a large NH3 yield rate of 25.63 μg h−1 mgcat.−1 at −0.40 V versus reversible hydrogen electrode in 0.1 M HCl.

Isolated single-atom Pt sites for highly selective electrocatalytic hydrogenation of formaldehyde to methanol

2020 ◽  
Vol 8 (18) ◽  
pp. 8913-8919 ◽  
Author(s):  
Shunzheng Zhao ◽  
Yanfeng Wen ◽  
Xianyun Peng ◽  
Yuying Mi ◽  
Xijun Liu ◽  
...  
Keyword(s):  
Single Atom ◽  
High Yield ◽  
Electrocatalytic Hydrogenation ◽  
Electrochemical Hydrogenation ◽  
Faradaic Efficiency ◽  
Single Atoms ◽  
Yield Rate

Pt single atoms anchored on ultrathin Ti3C2Tx nanosheets can effectively catalyze the electrochemical hydrogenation of formaldehyde to methanol with a desirable faradaic efficiency of 95.8% and a record high yield rate of 30.7 mg h−1 mgcat.−1.

Bimetallic metal–organic framework-derived MoFe-PC microspheres for electrocatalytic ammonia synthesis under ambient conditions

2020 ◽  
Vol 8 (4) ◽  
pp. 2099-2104 ◽  
Author(s):  
Silong Chen ◽  
Haeseong Jang ◽  
Jia Wang ◽  
Qing Qin ◽  
Xien Liu ◽  
...  
Keyword(s):  
Porous Structure ◽  
Active Sites ◽  
Ammonia Synthesis ◽  
Metal Organic Framework ◽  
High Yield ◽  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
Yield Rate ◽  
Metal Organic ◽  
Organic Framework

MoFe-PC exhibits a high yield rate and faradaic efficiency for NH3 electrosynthesis in acidic electrolytes due to the multicomponent active sites and inherent porous structure.

Biomass-derived oxygen-doped hollow carbon microtubes for electrocatalytic N2-to-NH3 fixation under ambient conditions

2019 ◽  
Vol 55 (18) ◽  
pp. 2684-2687 ◽  
Author(s):  
Tengteng Wu ◽  
Peipei Li ◽  
Huanbo Wang ◽  
Runbo Zhao ◽  
Qiang Zhou ◽  
...  
Keyword(s):  
Ambient Conditions ◽  
Faradaic Efficiency ◽  
Yield Rate ◽  
Hollow Carbon

Oxygen-doped hollow carbon microtubes electrocatalyze the N2-to-NH3 fixation with a faradaic efficiency of 9.1% and a NH3 yield rate of 25.12 μg h−1 mgcat.−1 at −0.80 V and −0.85 V vs. RHE, respectively.

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