scholarly journals Chemo-bio catalysis using carbon supports: application in H2-driven cofactor recycling

2021 ◽  
Author(s):  
Xu Zhao ◽  
Sarah E Cleary ◽  
Ceren Zor ◽  
Nicole Grobert ◽  
Holly A Reeve ◽  
...  
Keyword(s):  
Carbon Supports ◽  
Cofactor Recycling ◽  
Metal Metal ◽  
Available Carbon ◽  
Supported Metal

Heterogeneous biocatalytic hydrogenation is an attractive strategy for clean, enantioselective C=X reduction. This approach relies on enzymes powered by H2-driven NADH recycling. Commercially available carbon-supported metal (metal/C) catalysts are investigated...

scholarly journals Chemo-Bio Catalysis Using Carbon Supports: Application in H2-Driven Cofactor Recycling

2020 ◽  
Author(s):  
Xu Zhao ◽  
Sarah Cleary ◽  
Ceren Zor ◽  
Nicole Grobert ◽  
Holly Reeve ◽  
...  
Keyword(s):  
Catalyst Activity ◽  
Carbon Support ◽  
Carbon Supports ◽  
Reaction Conditions ◽  
Support Materials ◽  
Cofactor Recycling ◽  
Metal Metal ◽  
Hydrogenation Reactions ◽  
Available Carbon ◽  
H2 Oxidation

<div>Commercially available carbon-supported metal (metal/C) catalysts are investigated here for direct H2-driven NAD+ reduction. Selected metal/C catalysts are then</div><div>used for H2 oxidation with electrons transferred via the conductive carbon support material to an adsorbed enzyme for NAD+ reduction. These chemo-bio catalysts show improved activity and selectivity for generating bioactive NADH under ambient reaction conditions compared</div><div>to metal/C catalysts. The metal/C catalysts and carbon support materials (all activated carbon or carbon black) are characterised to probe which properties potentially influence catalyst activity. The optimised chemo-bio catalysts are then used to supply NADH to an alcohol dehydrogenase for enantioselective (>99% ee) ketone reductions, leading to high cofactor turnover numbers and Pd and NAD+ reductase activities of 441 h-1 and 2,347 h-1,</div><div>respectively. This method demonstrates a new way of combining chemo- and biocatalysis on carbon supports, highlighted here for selective hydrogenation reactions.</div>

scholarly journals Chemo-Bio Catalysis Using Carbon Supports: Application in H2-Driven Cofactor Recycling

2020 ◽  
Author(s):  
Xu Zhao ◽  
Sarah Cleary ◽  
Ceren Zor ◽  
Nicole Grobert ◽  
Holly Reeve ◽  
...  
Keyword(s):  
Catalyst Activity ◽  
Carbon Support ◽  
Carbon Supports ◽  
Reaction Conditions ◽  
Support Materials ◽  
Cofactor Recycling ◽  
Metal Metal ◽  
Hydrogenation Reactions ◽  
Available Carbon ◽  
H2 Oxidation

<div>Commercially available carbon-supported metal (metal/C) catalysts are investigated here for direct H2-driven NAD+ reduction. Selected metal/C catalysts are then</div><div>used for H2 oxidation with electrons transferred via the conductive carbon support material to an adsorbed enzyme for NAD+ reduction. These chemo-bio catalysts show improved activity and selectivity for generating bioactive NADH under ambient reaction conditions compared</div><div>to metal/C catalysts. The metal/C catalysts and carbon support materials (all activated carbon or carbon black) are characterised to probe which properties potentially influence catalyst activity. The optimised chemo-bio catalysts are then used to supply NADH to an alcohol dehydrogenase for enantioselective (>99% ee) ketone reductions, leading to high cofactor turnover numbers and Pd and NAD+ reductase activities of 441 h-1 and 2,347 h-1,</div><div>respectively. This method demonstrates a new way of combining chemo- and biocatalysis on carbon supports, highlighted here for selective hydrogenation reactions.</div>

Research Progress on Porous Carbon Supported Metal/Metal Oxide Nanomaterials for Supercapacitor Electrode Applications

2020 ◽  
Vol 59 (14) ◽  
pp. 6347-6374 ◽  
Author(s):  
Pitchaimani Veerakumar ◽  
Arumugam Sangili ◽  
Shaktivel Manavalan ◽  
Pounraj Thanasekaran ◽  
King-Chuen Lin
Keyword(s):  
Metal Oxide ◽  
Porous Carbon ◽  
Research Progress ◽  
Supercapacitor Electrode ◽  
Metal Metal ◽  
Metal Oxide Nanomaterials ◽  
Supported Metal

Graphene-supported metal/metal oxide nanohybrids: synthesis and applications in heterogeneous catalysis

2015 ◽  
Vol 5 (8) ◽  
pp. 3903-3916 ◽  
Author(s):  
Yi Cheng ◽  
Yiqiu Fan ◽  
Yan Pei ◽  
Minghua Qiao
Keyword(s):  
Heterogeneous Catalysis ◽  
Metal Oxide ◽  
Recent Advances ◽  
Metal Metal ◽  
Catalytic Applications ◽  
Supported Metal

This minireview outlines recent advances in the design and catalytic applications of graphene-supported metal/metal oxide nanohybrids.

Stabilization of Pt on Carbon Supports Doped with Atomically-Dispersed Metal/Metal-Oxide Additives

2021 ◽  
Vol MA2021-02 (39) ◽  
pp. 1169-1169
Author(s):  
Nagappan Ramaswamy ◽  
Anusorn Kongkanand ◽  
Swami Kumaraguru ◽  
Travis Ziegler ◽  
Ratandeep Kukreja ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Carbon Supports ◽  
Metal Metal

scholarly journals Quantification of critical particle distance for mitigating catalyst sintering

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Peng Yin ◽  
Sulei Hu ◽  
Kun Qian ◽  
Zeyue Wei ◽  
Le-Le Zhang ◽  
...  
Keyword(s):  
Carbon Black ◽  
Dark Field ◽  
Critical Distance ◽  
Supported Metal Catalysts ◽  
Carbon Supports ◽  
Thermally Induced ◽  
Surface Areas ◽  
Scanning Transmission ◽  
Annular Dark Field ◽  
Supported Metal

AbstractSupported metal nanoparticles are of universal importance in many industrial catalytic processes. Unfortunately, deactivation of supported metal catalysts via thermally induced sintering is a major concern especially for high-temperature reactions. Here, we demonstrate that the particle distance as an inherent parameter plays a pivotal role in catalyst sintering. We employ carbon black supported platinum for the model study, in which the particle distance is well controlled by changing platinum loading and carbon black supports with varied surface areas. Accordingly, we quantify a critical particle distance of platinum nanoparticles on carbon supports, over which the sintering can be mitigated greatly up to 900 °C. Based on in-situ aberration-corrected high-angle annular dark-field scanning transmission electron and theoretical studies, we find that enlarging particle distance to over the critical distance suppress the particle coalescence, and the critical particle distance itself depends sensitively on the strength of metal-support interactions.

scholarly journals Review—Electrochemical Hydrazine Sensors Based on Graphene Supported Metal / Metal Oxide Nanomaterials

2021 ◽  
Author(s):  
Hamed Y. Mohammed ◽  
Maamon Farea ◽  
Nikesh N. Ingle ◽  
Theeazen Al‑Gahouari ◽  
Pasha W. Sayyad ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Metal ◽  
Metal Oxide Nanomaterials ◽  
Supported Metal
Sign in / Sign up

Export Citation Format

Share Document