Photo-Assisted High Performance Single Atom Electrocatalysis of N2 Reduction Reaction by Mo-embedded Covalent Organic Framework

2021 ◽  
Author(s):  
Juan Wang ◽  
Zhihua Zhang ◽  
Siyun Qi ◽  
Yingcai Fan ◽  
Yanmei Yang ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Reduction Reaction ◽  
Single Atom ◽  
Ambient Conditions ◽  
Environment Friendly ◽  
Covalent Organic Framework ◽  
High Efficient ◽  
Organic Framework

The development of high efficient, low cost and environment-friendly solutions for the conversion of gas nitrogen to ammonia under ambient conditions has great industrial and academic significance. Single-atom catalysis (SAC)...

scholarly journals Bismuth-Based Free-Standing Electrodes for Ambient-Condition Ammonia Production in Neutral Media

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Ying Sun ◽  
Zizhao Deng ◽  
Xi-Ming Song ◽  
Hui Li ◽  
Zihang Huang ◽  
...  
Keyword(s):  
Low Cost ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Ambient Conditions ◽  
Free Standing ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Long Term Stability ◽  
High Efficient ◽  
Neutral Media

AbstractElectrocatalytic nitrogen reduction reaction is a carbon-free and energy-saving strategy for efficient synthesis of ammonia under ambient conditions. Here, we report the synthesis of nanosized Bi2O3 particles grown on functionalized exfoliated graphene (Bi2O3/FEG) via a facile electrochemical deposition method. The obtained free-standing Bi2O3/FEG achieves a high Faradaic efficiency of 11.2% and a large NH3 yield of 4.21 ± 0.14 $$ \upmu{\text{g}}_{{{\text{NH}}_{3} }} $$ μ g NH 3  h−1 cm−2 at − 0.5 V versus reversible hydrogen electrode in 0.1 M Na2SO4, better than that in the strong acidic and basic media. Benefiting from its strong interaction of Bi 6p band with the N 2p orbitals, binder-free characteristic, and facile electron transfer, Bi2O3/FEG achieves superior catalytic performance and excellent long-term stability as compared with most of the previous reported catalysts. This study is significant to design low-cost, high-efficient Bi-based electrocatalysts for electrochemical ammonia synthesis.

scholarly journals Super-Dispersed Fe–N Sites Embedded into Porous Graphitic Carbon for ORR: Size, Composition and Activity Control

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2106
Author(s):  
Xin Yu Wang ◽  
Ze Wei Lin ◽  
Yan Qing Jiao ◽  
Jian Cong Liu ◽  
Rui Hong Wang
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Size Composition ◽  
Reduction Reaction ◽  
Molar Ratio ◽  
Alkaline Electrolyte ◽  
Zeolitic Imidazolate Frameworks ◽  
Onset Potential ◽  
High Efficient ◽  
Nitrogen Doped Carbon

Searching for high-efficient, good long-term stability, and low-cost electrocatalysts toward oxygen reduction reaction (ORR) is highly desirable for the development of sustainable energy conversion devices. Iron–nitrogen doped carbon (Fe–N/C) catalysts have been recognized as the most promising candidates for traditional Pt-based catalysts that benefit from their high activity, excellent anti-poisoning ability, and inexpensiveness. Here, a super-dispersed and high-performance Fe–N/C catalyst was derived from chemically Fe-doped zeolitic imidazolate frameworks (ZIFs) by directly bonding Fe ions to imidazolate ligands within 3D frameworks. It produced a series of catalysts, whose sizes could be tuned in the range from 62 to over 473 nm in diameter. After rationally regulating the component and heating treatment, the best ORR activity was measured for the catalyst with a size of 105 nm, which was obtained when the Fe3+/Zn2+ molar ratio was 0.05 and carbonization temperature was 900 °C. It exhibited a high onset potential (Eonset = 0.99 V) and half-wave potential (E1/2 = 0.885 V) compared with a commercial 20% Pt/C catalyst (Eonset = 0.10 V, E1/2 = 0.861 V) as well as much better durability and methanol resistance in an alkaline electrolyte.

A binuclear Co-based metal-organic framework towards efficient oxygen evolution reaction

2021 ◽  
Author(s):  
Ning Liu ◽  
Qiaoqiao Zhang ◽  
Jingqi Guan
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Research Interest ◽  
Metal Organic ◽  
Organic Framework

Seeking for low-cost and high-performance electrocatalysts for oxygen evolution reaction (OER) has drawn enormous research interest in the last few years. Reported herein is the topotactic construction of a binuclear...

Photocatalytic CO2 conversion over single-atom MoN2 sites of covalent organic framework

2021 ◽  
Vol 291 ◽  
pp. 120146
Author(s):  
Mingpu Kou ◽  
Wei Liu ◽  
Yongye Wang ◽  
Jindi Huang ◽  
Yanli Chen ◽  
...  
Keyword(s):  
Single Atom ◽  
Co2 Conversion ◽  
Covalent Organic Framework ◽  
Photocatalytic Co2 Conversion ◽  
Organic Framework

Atomic regulation of metal-organic framework derived carbon-based single-atom catalysts for electrochemical CO2 reduction reaction

2021 ◽  
Author(s):  
Danni Zhou ◽  
Xinyuan Li ◽  
Huishan Shang ◽  
Fengjuan Qin ◽  
Wenxing Chen
Keyword(s):  
Active Sites ◽  
Metal Organic Framework ◽  
Co2 Reduction ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Single Atom ◽  
Electrochemical Co2 Reduction ◽  
Metal Organic ◽  
Co2 Reduction Reaction ◽  
Organic Framework

Metal-organic framework (MOF) derived single-atom catalysts (SACs), featured unique active sites and adjustable topological structures, exhibit high electrocatalytic performance on carbon dioxide reduction reactions (CO2RR). By modulating elements and atomic...

Unravelling the Origin of Bifunctional OER/ORR Activity for Single-Atom Catalysts Supported on C2N by DFT and Machine Learning

2021 ◽  
Author(s):  
Yiran Ying ◽  
Ke Fan ◽  
Xin Luo ◽  
Jinli Qiao ◽  
Haitao Huang
Keyword(s):  
Machine Learning ◽  
Fuel Cells ◽  
Oxygen Evolution ◽  
High Performance ◽  
Reduction Reaction ◽  
Single Atom ◽  
Orr Activity

Designing high-performance bifunctional oxygen evolution/reduction reaction (OER/ORR) catalysts is a newly emerged topic with wide applications in metal-air batteries and fuel cells. Herein, we report a group of (27) single-atom...

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