scholarly journals Rapid synthesis of ultrasmall platinum nanoparticles supported on macroporous cellulose fibers for catalysis

2019 ◽  
Vol 1 (8) ◽  
pp. 2953-2964 ◽  
Author(s):  
Md. Tariqul Islam ◽  
Jose A. Rosales ◽  
Ricardo Saenz-Arana ◽  
Shahrouz J. Ghadimi ◽  
Juan C. Noveron
Keyword(s):  
Formic Acid ◽  
Organic Compounds ◽  
Platinum Nanoparticles ◽  
Catalytic Reduction ◽  
Cellulose Fibers ◽  
Hydrogen Gas ◽  
Rapid Synthesis

Synthesis of ultrasmall platinum nanoparticles supported on macroporous cellulose fibers for hydrogen gas and formic acid induced catalytic reduction of organic compounds in water.

Catalytic reduction of Np(VI) with formic acid in the presence of platinum nanoparticles

2006 ◽  
Vol 48 (2) ◽  
pp. 125-132
Author(s):  
A. V. Anan’ev ◽  
V. P. Shilov ◽  
N. L. Sukhov ◽  
E. V. Abkhalimov ◽  
B. G. Ershov
Keyword(s):  
Formic Acid ◽  
Platinum Nanoparticles ◽  
Catalytic Reduction

Cationic poly-L-amino acid-enhanced selective hydrogen production based on formate decomposition with platinum nanoparticles dispersed by polyvinylpyrrolidone

2021 ◽  
Author(s):  
Yusuke Minami ◽  
Yutaka Amao
Keyword(s):  
Aqueous Solution ◽  
Amino Acid ◽  
Hydrogen Production ◽  
Formic Acid ◽  
Platinum Nanoparticles ◽  
Hydrogen Carrier ◽  
Low Toxicity ◽  
Formate Decomposition

Formate is attracting attention as a hydrogen carrier because of its low toxicity and easy handling in aqueous solution. In order to utilize formic acid as a hydrogen carrier, a...

scholarly journals Calvin Cycle Flux, Pathway Constraints, and Substrate Oxidation State Together Determine the H2 Biofuel Yield in Photoheterotrophic Bacteria

mBio ◽  
2011 ◽  
Vol 2 (2) ◽  
Author(s):  
James B. McKinlay ◽  
Caroline S. Harwood
Keyword(s):  
Organic Compounds ◽  
Oxidation State ◽  
Rhodopseudomonas Palustris ◽  
Calvin Cycle ◽  
Substrate Oxidation ◽  
Hydrogen Gas ◽  
Anaerobic Growth ◽  
Anoxygenic Phototrophic Bacteria ◽  
Transportation Fuel ◽  
Content Type

ABSTRACTHydrogen gas (H2) is a possible future transportation fuel that can be produced by anoxygenic phototrophic bacteria via nitrogenase. The electrons for H2are usually derived from organic compounds. Thus, one would expect more H2to be produced when anoxygenic phototrophs are supplied with increasingly reduced (electron-rich) organic compounds. However, the H2yield does not always differ according to the substrate oxidation state. To understand other factors that influence the H2yield, we determined metabolic fluxes inRhodopseudomonas palustrisgrown on13C-labeled fumarate, succinate, acetate, and butyrate (in order from most oxidized to most reduced). The flux maps revealed that the H2yield was influenced by two main factors in addition to substrate oxidation state. The first factor was the route that a substrate took to biosynthetic precursors. For example, succinate took a different route to acetyl-coenzyme A (CoA) than acetate. As a result,R. palustrisgenerated similar amounts of reducing equivalents and similar amounts of H2from both succinate and acetate, even though succinate is more oxidized than acetate. The second factor affecting the H2yield was the amount of Calvin cycle flux competing for electrons. When nitrogenase was active, electrons were diverted away from the Calvin cycle towards H2, but to various extents, depending on the substrate. When Calvin cycle flux was blocked, the H2yield increased during growth on all substrates. In general, this increase in H2yield could be predicted from the initial Calvin cycle flux.IMPORTANCEPhotoheterotrophic bacteria, likeRhodopseudomonas palustris, obtain energy from light and carbon from organic compounds during anaerobic growth. Cells can naturally produce the biofuel H2as a way of disposing of excess electrons. Unexpectedly, feeding cells organic compounds with more electrons does not necessarily result in more H2. Despite repeated observations over the last 40 years, the reasons for this discrepancy have remained unclear. In this paper, we identified two metabolic factors that influence the H2yield, (i) the route taken to make biosynthetic precursors and (ii) the amount of CO2-fixing Calvin cycle flux that competes against H2production for electrons. We show that the H2yield can be improved on all substrates by using a strain that is incapable of Calvin cycle flux. We also contributed quantitative knowledge to the long-standing question of why photoheterotrophs must produce H2or fix CO2even on relatively oxidized substrates.

Catalytic reduction of CO2 by Al–Sn-CNTs composite for synthesizing formic acid

2021 ◽  
Author(s):  
Jinrui Guo ◽  
Jing Tian ◽  
Jinhua Deng ◽  
Xinyu Yang ◽  
Binghui Duan ◽  
...  
Keyword(s):  
Formic Acid ◽  
Catalytic Reduction ◽  
Reduction Of Co2

A General Approach to the Size- and Shape-Controlled Synthesis of Platinum Nanoparticles and Their Catalytic Reduction of Oxygen

2008 ◽  
Vol 120 (19) ◽  
pp. 3644-3647 ◽  
Author(s):  
Chao Wang ◽  
Hideo Daimon ◽  
Taigo Onodera ◽  
Tetsunori Koda ◽  
Shouheng Sun
Keyword(s):  
Platinum Nanoparticles ◽  
Catalytic Reduction ◽  
Controlled Synthesis ◽  
Size And Shape ◽  
Shape Controlled

Room Temperature Reduction of Graphene Oxide by Formic Acid Catalyzed by Platinum Nanoparticles

2013 ◽  
Vol 13 (4) ◽  
pp. 2967-2973 ◽  
Author(s):  
Yinjie Wang ◽  
Jincheng Liu ◽  
Lei Liu ◽  
Tong Zhang ◽  
Darren D. Sun
Keyword(s):  
Graphene Oxide ◽  
Formic Acid ◽  
Platinum Nanoparticles ◽  
Room Temperature ◽  
Temperature Reduction ◽  
Acid Catalyzed
Sign in / Sign up

Export Citation Format

Share Document