Efficient CO<sub>2</sub>conversion by biocompatible N-doped carbon nanosheets coupled with<i>Ralstonia eutropha</i>: synergistic interactions between microbial and inorganic catalysts

Yao, Jiani; Xiu, Siyuan; Zheng, Shujie; Zhang, Shuai; Zhou, Zijing; Hou, Yang; Yang, Bin; Lei, Lecheng; Li, Zhongjian

doi:10.1039/d3gc00855j

Cited by 3 publications

(1 citation statement)

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“…The segmented pyrolysis approach was employed primarily to enhance the degree of metal segregation, a crucial factor promoting alloy formation. [ 49,50 ] As we know, Zn is readily volatilized at high temperature because of the low boiling point (907 °C). [ 51 ] Herein, we employed a Zn‐volatilization strategy to vary the component of Zn in bimetallic nanoparticle through controlling the…”

Section: Resultsmentioning

confidence: 99%

Atomic Zn‐Doping Induced Sabatier Optimum in NiZn_0.03 Catalyst for CO₂ Electroreduction at Industrial‐Level Current Densities

Tuo,

Lu,

Liu

et al. 2023

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The Sabatier principle defines the essential criteria for an ideal catalyst in heterogeneous catalysis, while reaching the Sabatier optimum is still challenging in catalyst design. Herein, an elegant strategy is described to reach the Sabatier optimum of Ni electrocatalyst in CO2 reduction reaction (CO2RR) by atomically Zn doping. The incorporation of 3% Zn single atom into Ni lattice leads to the moderate degrade of d‐band center via Ni–Zn electronic coupling, which balances the bonding strengths of *COOH and *CO, resulting in a relative low energy barrier for CO2 activation while not being substantially poisoned by CO. Consequently, NiZn0.03/C exhibits unique catalytic activity (jCO >100 mA cm−2 at −0.6 V), wide potential range for selective CO production (FECO >90% from −0.65 to −1.15 V), and outstanding long‐term stability (FECO >90% during 85 h electrolysis at −0.85 V). The results provide valuable insights for the rational fabrication of superior non‐noble bimetallic electrocatalysts in CO2 electroreduction.

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Section: Resultsmentioning

confidence: 99%

Atomic Zn‐Doping Induced Sabatier Optimum in NiZn_0.03 Catalyst for CO₂ Electroreduction at Industrial‐Level Current Densities

Tuo,

Lu,

Liu

et al. 2023

Small

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Opportunities of CO2-based biorefineries for production of fuels and chemicals

Liu,

Shi,

et al. 2023

Green Carbon

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Polyhydroxyalkanoate Copolymer Production by Recombinant Ralstonia eutropha Strain 1F2 from Fructose or Carbon Dioxide as Sole Carbon Source

Wang,

Sivashankari,

Miyahara

et al. 2024

Bioengineering

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Ralstonia eutropha strain H16 is a chemoautotrophic bacterium that oxidizes hydrogen and accumulates poly[(R)-3-hydroxybutyrate] [P(3HB)], a prominent polyhydroxyalkanoate (PHA), within its cell. R. eutropha utilizes fructose or CO2 as its sole carbon source for this process. A PHA-negative mutant of strain H16, known as R. eutropha strain PHB−4, cannot produce PHA. Strain 1F2, derived from strain PHB−4, is a leucine analog-resistant mutant. Remarkably, the recombinant 1F2 strain exhibits the capacity to synthesize 3HB-based PHA copolymers containing 3-hydroxyvalerate (3HV) and 3-hydroxy-4-methyvalerate (3H4MV) comonomer units from fructose or CO2. This ability is conferred by the expression of a broad substrate-specific PHA synthase and tolerance to feedback inhibition of branched amino acids. However, the total amount of comonomer units incorporated into PHA was up to around 5 mol%. In this study, strain 1F2 underwent genetic engineering to augment the comonomer supply incorporated into PHA. This enhancement involved several modifications, including the additional expression of the broad substrate-specific 3-ketothiolase gene (bktB), the heterologous expression of the 2-ketoacid decarboxylase gene (kivd), and the phenylacetaldehyde dehydrogenase gene (padA). Furthermore, the genome of strain 1F2 was altered through the deletion of the 3-hydroxyacyl-CoA dehydrogenase gene (hbdH). The introduction of bktB-kivd-padA resulted in increased 3HV incorporation, reaching 13.9 mol% from fructose and 6.4 mol% from CO2. Additionally, the hbdH deletion resulted in the production of PHA copolymers containing (S)-3-hydroxy-2-methylpropionate (3H2MP). Interestingly, hbdH deletion increased the weight-average molecular weight of the PHA to over 3.0 × 106 on fructose. Thus, it demonstrates the positive effects of hbdH deletion on the copolymer composition and molecular weight of PHA.

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Efficient CO₂conversion by biocompatible N-doped carbon nanosheets coupled withRalstonia eutropha: synergistic interactions between microbial and inorganic catalysts

Abstract: Biocompatible N-doped carbon nanosheets coupled with Ralstonia eutropha H16 enhanced bioelectrochemical CO2 conversion to poly-β-hydroxybutyrate.

Cited by 3 publications

References 50 publications

Atomic Zn‐Doping Induced Sabatier Optimum in NiZn_0.03 Catalyst for CO₂ Electroreduction at Industrial‐Level Current Densities

Atomic Zn‐Doping Induced Sabatier Optimum in NiZn_0.03 Catalyst for CO₂ Electroreduction at Industrial‐Level Current Densities

Opportunities of CO2-based biorefineries for production of fuels and chemicals

Polyhydroxyalkanoate Copolymer Production by Recombinant Ralstonia eutropha Strain 1F2 from Fructose or Carbon Dioxide as Sole Carbon Source

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Efficient CO2conversion by biocompatible N-doped carbon nanosheets coupled withRalstonia eutropha: synergistic interactions between microbial and inorganic catalysts

Abstract: Biocompatible N-doped carbon nanosheets coupled with Ralstonia eutropha H16 enhanced bioelectrochemical CO2 conversion to poly-β-hydroxybutyrate.

Cited by 3 publications

References 50 publications

Atomic Zn‐Doping Induced Sabatier Optimum in NiZn0.03 Catalyst for CO2 Electroreduction at Industrial‐Level Current Densities

Atomic Zn‐Doping Induced Sabatier Optimum in NiZn0.03 Catalyst for CO2 Electroreduction at Industrial‐Level Current Densities

Opportunities of CO2-based biorefineries for production of fuels and chemicals

Polyhydroxyalkanoate Copolymer Production by Recombinant Ralstonia eutropha Strain 1F2 from Fructose or Carbon Dioxide as Sole Carbon Source

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Efficient CO₂conversion by biocompatible N-doped carbon nanosheets coupled withRalstonia eutropha: synergistic interactions between microbial and inorganic catalysts

Atomic Zn‐Doping Induced Sabatier Optimum in NiZn_0.03 Catalyst for CO₂ Electroreduction at Industrial‐Level Current Densities

Atomic Zn‐Doping Induced Sabatier Optimum in NiZn_0.03 Catalyst for CO₂ Electroreduction at Industrial‐Level Current Densities