scholarly journals Biomass-Derived Nitrogen-Doped Porous Carbon for Highly Efficient Ambient Electro-Synthesis of NH3

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 353
Author(s):  
Qinglin Li ◽  
Xiufang Chen ◽  
Yong Yang
Keyword(s):  
Porous Carbon ◽  
Cost Effective ◽  
Environmentally Benign ◽  
Ambient Conditions ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Nitrogen Doped ◽  
N Source ◽  
Bamboo Shoots ◽  
Hcl Solution

In this communication, we report a biomass-derived nitrogen-doped porous carbon (named as NC-800) as an electrocatalyst for the ambient conversion of N2 to NH3. The catalyst NC-800 was prepared from naturally renewable and easily available bamboo shoots, with inherently an approximate 8 wt % of N-containing components, such as the N source, in a cost-effective and environmentally benign manner. This exhibited remarkable catalytic activity with a large NH3 yield and a Faradaic efficiency as high as 16.3 μg h−mg-1cat and 27.5%, respectively, at −0.35 V versus a reversible hydrogen electrode (RHE) in 0.1 M HCl solution at ambient conditions. More importantly, the catalyst NC-800 demonstrated excellent electrochemical selectivity and stability.

Facile, cost-effective plasma synthesis of self-supportive FeSx on Fe foam for efficient electrochemical reduction of N2 under ambient conditions

2019 ◽  
Vol 7 (34) ◽  
pp. 19977-19983 ◽  
Author(s):  
Wei Xiong ◽  
Zheng Guo ◽  
Shijun Zhao ◽  
Qian Wang ◽  
Qiyong Xu ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Electrochemical Reduction ◽  
Production Rate ◽  
Low Cost ◽  
Cost Effective ◽  
Plasma Synthesis ◽  
Ambient Conditions ◽  
Faradaic Efficiency

A non-precious, self-supportive FeSx NRR electrocatalyst was synthesized by a simple H2S-plasma treatment on low-cost Fe foam, which shows a remarkable NH3 production rate of 4.13 × 10−10 mol s−1 cm−2 and a high faradaic efficiency of 17.6%.

scholarly journals A Pd/MnO2 Electrocatalyst for Nitrogen Reduction to Ammonia under Ambient Conditions

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 802
Author(s):  
Chang Sun ◽  
Yingxin Mu ◽  
Yuxin Wang
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Pd Nanoparticles ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Transmission Electron ◽  
Alternative Approach ◽  
Supported Pd

Electrochemical ammonia synthesis, which is an alternative approach to the Haber–Bosch process, has attracted the attention of researchers because of its advantages including mild working conditions, environmental protection, and simple process. However, the biggest problem in this field is the lack of high-performance catalysts. Here, we report high-efficiency electroreduction of N2 to NH3 on γ-MnO2-supported Pd nanoparticles (Pd/γ-MnO2) under ambient conditions, which exhibits excellent catalytic activity with an NH3 yield rate of 19.72 μg·mg−1Pd h−1 and a Faradaic efficiency of 8.4% at −0.05 V vs. the reversible hydrogen electrode (RHE). X-ray diffraction (XRD) and transmission electron microscopy (TEM) characterization shows that Pd nanoparticles are homogeneously dispersed on the γ-MnO2. Pd/γ-MnO2 outperforms other catalysts including Pd/C and γ-MnO2 because of its synergistic catalytic effect between Pd and Mn.

An ultrasmall Ru2P nanoparticles–reduced graphene oxide hybrid: an efficient electrocatalyst for NH3 synthesis under ambient conditions

2020 ◽  
Vol 8 (1) ◽  
pp. 77-81 ◽  
Author(s):  
Runbo Zhao ◽  
Chuangwei Liu ◽  
Xiaoxue Zhang ◽  
Xiaojuan Zhu ◽  
Peipei Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reversible Hydrogen Electrode ◽  
Ambient Conditions ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Reduced Graphene

A Ru2P–reduced graphene oxide hybrid acts as a superior catalyst for electrochemical N2 fixation in 0.1 M HCl, achieving a large NH3 yield of 32.8 μg h−1mgcat.−1 and a high faradaic efficiency of 13.04%−0.05 V vs. the reversible hydrogen electrode.

scholarly journals A bifunctional CoP/N-doped porous carbon composite derived from a single source precursor for bisphenol A removal

RSC Advances ◽  
2020 ◽  
Vol 10 (17) ◽  
pp. 9976-9984 ◽  
Author(s):  
Wenhua Tong ◽  
Yi Xie ◽  
Wanrong Hu ◽  
Yuanyuan Peng ◽  
Wenbin Liu ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Porous Carbon ◽  
Cost Effective ◽  
Carbon Composite ◽  
Environmentally Benign ◽  
Single Source ◽  
Single Source Precursor ◽  
Bpa Removal ◽  
Carbon Nanocomposite

Cost-effective and environmentally benign biomass precursor enabled synthesis of CoP/N-doped porous carbon nanocomposite for BPA removal through adsorption and peroxymonosulfate activation.

Structure, Activity, and Faradaic Efficiency of Nitrogen-Doped Porous Carbon Catalysts for Direct Electrochemical Hydrogen Peroxide Production

ChemSusChem ◽  
2018 ◽  
Vol 11 (19) ◽  
pp. 3388-3395 ◽  
Author(s):  
Yanyan Sun ◽  
Shuang Li ◽  
Zarko Petar Jovanov ◽  
Denis Bernsmeier ◽  
Huan Wang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Porous Carbon ◽  
Hydrogen Peroxide Production ◽  
Faradaic Efficiency ◽  
Nitrogen Doped ◽  
Structure Activity ◽  
Carbon Catalysts

scholarly journals Transition Metal Aluminum Boride as a New Candidate for Ambient-Condition Electrochemical Ammonia Synthesis

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Yang Fu ◽  
Peter Richardson ◽  
Kangkang Li ◽  
Hai Yu ◽  
Bing Yu ◽  
...  
Keyword(s):  
Transition Metal ◽  
High Energy ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Applied Potential ◽  
Ambient Conditions ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Aluminum Boride ◽  
Metal Aluminum

AbstractAchieving more meaningful N2 conversion by reducing the energy input and carbon footprint is now being investigated through a method of N2 fixation instead of the Haber–Bosch process. Unfortunately, the electrochemical N2 reduction reaction (NRR) method as a rising approach currently still shows low selectivity (Faradaic efficiency < 10%) and high-energy consumption [applied potential at least − 0.2 V versus the reversible hydrogen electrode (RHE)]. Here, the role of molybdenum aluminum boride single crystals, belonging to a family of ternary transition metal aluminum borides known as MAB phases, is reported for the electrochemical NRR for the first time, at a low applied potential (− 0.05 V versus RHE) under ambient conditions and in alkaline media. Due to the unique nano-laminated crystal structure of the MAB phase, these inexpensive materials have been found to exhibit excellent electrocatalytic performances (NH3 yield: 9.2 µg h−1 cm−2 mg cat. −1 , Faradaic efficiency: 30.1%) at the low overpotential, and to display a high chemical stability and sustained catalytic performance. In conjunction, further mechanism studies indicate B and Al as main-group metals show a highly selective affinity to N2 due to the strong interaction between the B 2p/Al 3p band and the N 2p orbitals, while Mo exhibits specific catalytic activity toward the subsequent reduction reaction. Overall, the MAB-phase catalyst under the synergy of the elements within ternary compound can suppress the hydrogen evolution reaction and achieve enhanced NRR performance. The significance of this work is to provide a promising candidate in the future synthesis of ammonia.

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.

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.

Bimetallic Mo–Co nanoparticles anchored on nitrogen-doped carbon for enhanced electrochemical nitrogen fixation

2020 ◽  
Vol 8 (18) ◽  
pp. 9091-9098 ◽  
Author(s):  
Yizhen Zhang ◽  
Jue Hu ◽  
Chengxu Zhang ◽  
Yizhe Liu ◽  
Mengyuan Xu ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Porous Carbon ◽  
Bimetallic Nanoparticles ◽  
Cost Effective ◽  
Nitrogen Doped ◽  
Effective Catalyst ◽  
Co Nanoparticles ◽  
Nitrogen Doped Carbon

The Mo–Co bimetallic nanoparticles anchored on the nitrogen-doped porous carbon (Mo–Co/NC) are developed and serve as a cost-effective catalyst candidate for the NRR.

scholarly journals Folic Acid Self-Assembly Enabling Manganese Single-Atom Electrocatalyst for Selective Nitrogen Reduction to Ammonia

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Xuewan Wang ◽  
Dan Wu ◽  
Suyun Liu ◽  
Jiujun Zhang ◽  
Xian-Zhu Fu ◽  
...  
Keyword(s):  
Folic Acid ◽  
Self Assembly ◽  
Active Sites ◽  
Density Functional ◽  
Carbon Matrix ◽  
Single Atom ◽  
Synthesis Process ◽  
Ambient Conditions ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency

AbstractEfficient and robust single-atom catalysts (SACs) based on cheap and earth-abundant elements are highly desirable for electrochemical reduction of nitrogen to ammonia (NRR) under ambient conditions. Herein, for the first time, a Mn–N–C SAC consisting of isolated manganese atomic sites on ultrathin carbon nanosheets is developed via a template-free folic acid self-assembly strategy. The spontaneous molecular partial dissociation enables a facile fabrication process without being plagued by metal atom aggregation. Thanks to well-exposed atomic Mn active sites anchored on two-dimensional conductive carbon matrix, the catalyst exhibits excellent activity for NRR with high activity and selectivity, achieving a high Faradaic efficiency of 32.02% for ammonia synthesis at  − 0.45 V versus reversible hydrogen electrode. Density functional theory calculations unveil the crucial role of atomic Mn sites in promoting N2 adsorption, activation and selective reduction to NH3 by the distal mechanism. This work provides a simple synthesis process for Mn–N–C SAC and a good platform for understanding the structure-activity relationship of atomic Mn sites. Graphic Abstract

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