Results 81 to 90 of about 35,705 (280)

Presence and expression of hydrogenase specific C-terminal endopeptidases in cyanobacteria

BMC Microbiology, 2003
Background Hydrogenases catalyze the simplest of all chemical reactions: the reduction of protons to molecular hydrogen or vice versa. Cyanobacteria can express an uptake, a bidirectional or both NiFe-hydrogenases.
Lindblad Peter, Batur Mehtap, Wünschiers Röbbe   +2 more
doaj   +1 more source

Hydrogen Migration Enhances Proton‐Coupled Electron Transfer in an S‐Scheme Heterojunction for High‐Efficiency Photocatalysis

Carbon Energy, EarlyView.
Precisely directed built‐in electric field in an S‐scheme heterojunction synergizes photogenerated charge separation with interfacial proton migration, thus co‐localizing electrons and protons on the NOH surface and boosting proton‐coupled electron transfer kinetics in the rate‐determining hydrogen release step. ABSTRACT The kinetic bottleneck in solar‐
Qinhao Zhao, Yuxin Wang, Xuyu Yang, Shuhan Sun, Kai Li, Yanxian Jin, Huayue Zhu, Song Wang, Xiao Zhang, Xianqiang Xiong   +9 more
wiley   +1 more source

Nickel centred H+ reduction catalysis in a model of [NiFe] Hydrogenase

Nature Chemistry, 2016
Hydrogen production through water splitting is one of the most promising solutions for the storage of renewable energy. [NiFe] hydrogenases are organometallic enzymes containing nickel and iron centers that catalyze hydrogen evolution with performances ...
Deborah Brazzolotto, Marcello Gennari, N. Queyriaux, Trevor R. Simmons, J. Pécaut, S. Demeshko, F. Meyer, M. Orio, V. Artero, C. Duboc   +9 more
semanticscholar   +1 more source

Advances in Design Strategy and Mechanism Insights for Alkaline Hydrogen Evolution Reaction: Multilevel Site Engineering and Structure–Activity Relationship

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This review is about material design based on engineering multilevel sites from theoretical calculation and synthetic routes to mechanism, structure–activity relationship, challenges and perspectives for boosting hydrogen production in alkaline electrolyte. Electrolytic water splitting is a clean, carbon‐free method for producing green hydrogen and has
Ke Zhang, Hongying Luo, Yudong Du, Kehao Yu, Huayu Wu, Shimin Chai, Yanyan Liu, Yongfeng Wang, Jianchun Jiang, Baojun Li   +9 more
wiley   +1 more source

Single-Amino Acid Modifications Reveal Additional Controls on the Proton Pathway of [FeFe]-Hydrogenase

, 2016
The proton pathway of [FeFe]-hydrogenase is essential for enzymatic H2 production and oxidation and is composed of four residues and a water molecule.
Michel Dupuis (1294080), Adam J. Cornish (118795), Simone Raugei (249177), Julio C. S. da Silva (2808169), Bojana Ginovska (2394157), Thereza A. Soares (1794793), Wendy J. Shaw (1522657), Adam Thelen (2808172), Eric L. Hegg (118846)   +8 more
core   +1 more source

H2 Kinetic Isotope Fractionation Superimposed by Equilibrium Isotope Fractionation During Hydrogenase Activity of D. vulgaris Strain Miyazaki

Frontiers in Microbiology, 2019
We determined 2H stable isotope fractionation at natural abundances associated with hydrogenase activity by whole cells of Desulfovibrio vulgaris strain Miyazaki F expressing a NiFe(Se) hydrogenase.
Michaela Löffler, Steffen Kümmel, Carsten Vogt, Hans-Hermann Richnow   +3 more
doaj   +1 more source

Artificial [FeFe]‐Hydrogenase Mimics From Ferrocenyl Thioketone‐Functionalized Triphenylamine and (Bi)thiophene Derivatives: Synthesis, Characterization, and Hydrogen Evolution Catalysis

European Journal of Inorganic Chemistry, EarlyView.
Synthesis of ferrocenyl thioketone‐functionalized triphenylamine and triphenylamine‐(bi)thiophene derivatives as proligands for the assembly of artificial [FeFe]‐hydrogenase active site models. Thiocarbonyl compounds, especially thioketones, have emerged as promising precursors for constructing [FeFe]‐hydrogenase mimics that can mediate hydrogen ...
Hassan Abul‐Futouh, Ibrahim Basma, Sara J. Abaalkhail, Ahmad Q. Daraosheh, Phil Köhler, Wolfgang Weigand   +5 more
wiley   +1 more source

Reaction Coordinate Leading to H2 Production in [FeFe]-Hydrogenase Identified by NRVS and DFT

Journal of the American Chemical Society, 2017
[FeFe]-hydrogenases are metalloenzymes that reversibly reduce protons to molecular hydrogen at exceptionally high rates. We have characterized the catalytically competent hydride state (Hhyd) in the [FeFe]-hydrogenases from both Chlamydomonas reinhardtii
Vladimir Pelmenschikov, James A. Birrell, Cindy C Pham, Nakul Mishra, Hongxin Wang, C. Sommer, E. Reijerse, C. Richers, K. Tamasaku, Y. Yoda, T. Rauchfuss, W. Lubitz, S. Cramer   +12 more
semanticscholar   +1 more source

Bacterial Diversity of a Microbial Mat from Hot Spring at Wartawan Beach, Lampung and Its Potential as a Source of Hydrogenases

Squalen, 2018
Biohydrogen produced from thermophilic hydrogenases is an ideal and clean energy sources. As the biggest tectonic area in the world, Indonesia is potential for thermophile isolation.
Gintung Patantis, Ekowati Chasanah, Yusro Nuri Fawzya, He Pe Qing, Zhang Xue Lei   +4 more
doaj   +1 more source

Waste to Hydrogen: Transforming Food Waste Into Biohythane (Bio‐H2 + Bio‐CH4) in a Two‐Stage Reactor With the Aid of a Metal‐Ion Catalyst

Energy Science &Engineering, EarlyView.
This study demonstrates a two‐stage catalytic bioreactor system that converts real food waste into high‐purity biohydrogen and biohythane. In Stage‐1, an enriched Clostridium thermocellum culture combined with Ni2+─Fe2+ bimetallic catalysis enhances hydrolysis efficiency and hydrogenase activity, resulting in a 77% increase in H2 yield and 75.8% purity
K. V. Sreedharan, Debabrata Barik, Ayyar Dinesh, D. Shanmugapriya, M. Santhamoorthy, N. Ashok   +5 more
wiley   +1 more source