scholarly journals Figures of Merit for Photocatalysis: Comparison of NiO/La-NaTaO3 and Synechocystis sp. PCC 6803 as a Semiconductor and a Bio-Photocatalyst for Water Splitting

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1415
Author(s):  
Eike S. Welter ◽  
Sebastian Kött ◽  
Fabian Brandenburg ◽  
Jens Krömer ◽  
Michael Goepel ◽  
...  
Keyword(s):  
Water Splitting ◽  
Critical Evaluation ◽  
Catalytic Performance ◽  
Similar Reaction ◽  
Apparent Quantum Yield ◽  
Reaction Conditions ◽  
Figures Of Merit ◽  
Space Time Yield ◽  
Synechocystis Sp ◽  
Pcc 6803

While photocatalysis is considered a promising sustainable technology in the field of heterogeneous catalysis as well as biocatalysis, figures of merit (FOM) for comparing catalytic performance, especially between disciplines, are not well established. Here, photocatalytic water splitting was conducted using a semiconductor (NiO/La-NaTaO3) and a bio-photocatalyst (Synechocystis sp. PCC 6803) in the same setup under similar reaction conditions, eliminating the often ill-defined influence of the setup on the FOMs obtained. Comparing the results enables the critical evaluation of existing FOMs and a quantitative comparison of both photocatalytic systems. A single FOM is insufficient to compare the photocatalysts, instead a combination of multiple FOMs (reaction rate, photocatalytic space time yield and a redefined apparent quantum yield) is superior for assessing a variety of photocatalytic systems.

scholarly journals Dehydrogenative Transformation of Alcoholic Substrates in Aqueous Media Catalyzed by an Iridium Complex Having a Functional Ligand with α-Hydroxypyridine and 4,5-Dihydro-1H-imidazol-2-yl Moieties

Catalysts ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 312 ◽  
Author(s):  
Masato Yoshida ◽  
Han Wang ◽  
Takuya Shimbayashi ◽  
Ken-ichi Fujita
Keyword(s):  
Catalytic System ◽  
Aqueous Media ◽  
Catalytic Performance ◽  
Water Soluble ◽  
Iridium Complex ◽  
Similar Reaction ◽  
Reaction Conditions ◽  
System A ◽  
Iridium Catalyst ◽  
Oxidation Of Alcohols

A new catalytic system that employs water as an environmentally friendly solvent for the dehydrogenative oxidation of alcohols and lactonization of diols has been developed. In this catalytic system, a water-soluble dicationic iridium complex having a functional ligand that comprises α-hydroxypyridine and 4,5-dihydro-1H-imidazol-2-yl moieties exhibits high catalytic performance. For example, the catalytic dehydrogenative oxidation of 1-phenylethanol in the presence of 0.25 mol % of the iridium catalyst and base under reflux in water proceeded to give acetophenone in 92% yield. Additionally, under similar reaction conditions, the iridium-catalyzed dehydrogenative lactonization of 1,2-benzenedimethanol gave phthalide in 98% yield.

scholarly journals Enzymatic Oxyfunctionalization Driven by Photosynthetic Water-Splitting in the Cyanobacterium Synechocystis sp. PCC 6803

Catalysts ◽  
2017 ◽  
Vol 7 (8) ◽  
pp. 240 ◽  
Author(s):  
Stefanie Böhmer ◽  
Katharina Köninger ◽  
Álvaro Gómez-Baraibar ◽  
Samiro Bojarra ◽  
Carolin Mügge ◽  
...  
Keyword(s):  
Water Splitting ◽  
Synechocystis Sp ◽  
Pcc 6803

Pd/ZrO2: An Efficient Catalyst for Liquid Phase Oxidation of Toluene in Solvent Free Conditions

2017 ◽  
Vol 15 (2) ◽  
Author(s):  
Mohsin Siddique ◽  
Muhammad Saeed ◽  
Mohammad Ilyas ◽  
Hussain Gulab
Keyword(s):  
Batch Reactor ◽  
Catalytic Efficiency ◽  
Catalytic Performance ◽  
Solvent Free ◽  
Catalyst Loading ◽  
Similar Reaction ◽  
Reaction Conditions ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Free Oxidation

Abstract 0.1 % Pd/ZrO2 was synthesized and characterized by various physicochemical techniques and was successfully used as catalyst for solvent free oxidation of toluene in the presence of molecular oxygen using batch reactor. The catalytic performance of Pd/ZrO2 was explored in terms of effect of catalyst loading, reaction time, temperature and partial pressure of oxygen on oxidation of toluene in solvent free conditions. Pd/ZrO2 was found as a stable catalyst under the reaction conditions. Used catalyst exhibited the same catalytic efficiency as fresh catalyst under similar reaction conditions. Reaction was taking place according to Langmuir-Hinshelwood type of mechanism.

Electrodeposited Ni-Fe-P-FeMnO3/Fe multi-stage nanostructured electrocatalyst with superior catalytic performance for water splitting

2021 ◽  
Author(s):  
Xiao Tan ◽  
Xin Liu ◽  
Yingying Si ◽  
Zunhang Lv ◽  
Zihan Li ◽  
...  
Keyword(s):  
Water Splitting ◽  
Alkaline Solution ◽  
Low Cost ◽  
Catalytic Performance ◽  
Multi Stage

It is very important to design and prepare low-cost and efficiency electrocatalysts for water splitting in alkaline solution. In this works, Ni-Fe-P and Ni-Fe-P-FeMnO3 electrocatalysts are developed using facile electrodeposition...

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