scholarly journals Effect of the Host Legume on Acetylene Reduction and Hydrogen Evolution by Rhizobium Nitrogenase

1983 ◽  
Vol 72 (1) ◽  
pp. 156-160 ◽  
Author(s):  
Scott A. Edie ◽  
Donald A. Phillips
Keyword(s):  
Hydrogen Evolution ◽  
Acetylene Reduction

Acetylene reduction and hydrogen evolution by nitrogenase in a Rhizobium–legume symbiosis

1983 ◽  
Vol 61 (3) ◽  
pp. 780-785 ◽  
Author(s):  
Scott A. Edie
Keyword(s):  
Hydrogen Evolution ◽  
Acetylene Reduction ◽  
Rhizobium Leguminosarum ◽  
High Light ◽  
Hydrogenase Activity ◽  
Uptake Hydrogenase ◽  
Vegetative Phase ◽  
Pisum Sativum L ◽  
Legume Symbiosis ◽  
The Relationship

The relationship between acetylene reduction and hydrogen evolution in air was examined in peas (Pisum sativum L. cv. Alaska) inoculated with Rhizobium leguminosarum strain 3740, which lacked uptake hydrogenase activity (Hup−). In the absence of a system for recycling hydrogen, changes in the relative efficiency of N2 fixation (RE), which is defined as RE = 1 − (hydrogen evolved in air)/(acetylene reduced), presumably reflect an altered capacity of nitrogenase to allocate electrons between protons and N2. The RE of plants grown without combined nitrogen declined during the vegetative phase of growth and increased after flowering. Continuous high light or elevated CO2 conditions in the absence of nitrate maintained throughout ontogeny accentuated decreases in RE. When nitrate was present in the growth medium declines in RE during the vegetative phase were lessened. These results are consistent with the concept that the electron allocation coefficient of nitrogenase varies in the absence of uptake hydrogenase activity.

A highly stable CoMo2S4/Ni3S2 heterojunction electrocatalyst for efficient hydrogen evolution

2021 ◽  
Author(s):  
Minmin Wang ◽  
Mengke Zhang ◽  
Wenwu Song ◽  
Weiting Zhong ◽  
Xunyue Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Current Density ◽  
A Current

A CoMo2S4/Ni3S2 heterojunction is prepared with an overpotential of only 51 mV to drive a current density of 10 mA cm−2 in 1 M KOH solution and ∼100% of the potential remains in the ∼50 h chronopotentiometric curve at 10 mA cm−2.

Rational prediction of multifunctional bilayer single atom catalysts for the hydrogen evolution, oxygen evolution and oxygen reduction reactions

Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20413-20424
Author(s):  
Riming Hu ◽  
Yongcheng Li ◽  
Fuhe Wang ◽  
Jiaxiang Shang
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Single Atom ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions

Bilayer single atom catalysts can serve as promising multifunctional electrocatalysts for the HER, ORR, and OER.

Optimizing electron density of nickel sulfide electrocatalysts through sulfur vacancy engineering for alkaline hydrogen evolution

2020 ◽  
Vol 8 (35) ◽  
pp. 18207-18214
Author(s):  
Dongbo Jia ◽  
Lili Han ◽  
Ying Li ◽  
Wenjun He ◽  
Caichi Liu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Electron Density ◽  
Rational Design ◽  
Nickel Sulfide ◽  
Catalytic Performance ◽  
Sulfide Catalysts ◽  
Sulfur Vacancy

A novel, rational design for porous S-vacancy nickel sulfide catalysts with remarkable catalytic performance for alkaline HER.

A crystalline–amorphous Ni–Ni(OH)2 core–shell catalyst for the alkaline hydrogen evolution reaction

2020 ◽  
Vol 8 (44) ◽  
pp. 23323-23329
Author(s):  
Jing Hu ◽  
Siwei Li ◽  
Yuzhi Li ◽  
Jing Wang ◽  
Yunchen Du ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Core Shell ◽  
Alkaline Conditions

Crystalline–amorphous Ni–Ni(OH)2 core–shell assembled nanosheets exhibit outstanding electrocatalytic activity and stability for hydrogen evolution under alkaline conditions.

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