scholarly journals Tuning the coordination number of Fe single atoms for the efficient reduction of CO2

2020 ◽  
Vol 22 (21) ◽  
pp. 7529-7536
Author(s):  
Huihuang Chen ◽  
Xu Guo ◽  
Xiangdong Kong ◽  
Yulin Xing ◽  
Yan Liu ◽  
...  
Keyword(s):  
Coordination Number ◽  
Single Atom ◽  
Single Atoms ◽  
Electrocatalytic Performance ◽  
Efficient Reduction ◽  
Co Conversion ◽  
Reduction Of Co2

The coordination number of Fe single-atom catalysts (Fe–N5/Fe–N6) significantly affects the electrocatalytic performance during CO2-to-CO conversion.

Electrochemical reduction of CO2 on graphene supported transition metals – towards single atom catalysts

2017 ◽  
Vol 19 (18) ◽  
pp. 11436-11446 ◽  
Author(s):  
Haiying He ◽  
Yesukhei Jagvaral
Keyword(s):  
Transition Metals ◽  
Electrochemical Reduction ◽  
Single Atom ◽  
Single Atoms ◽  
Computational Screening ◽  
Reduction Of Co2

Graphene supported single atoms show improved reactivity towards electrochemical CO2 reduction with the best candidates identified for producing CH4 by computational screening.

Theoretical study of the electrochemical reduction of CO2 on cerium dioxide supported palladium single atoms and nanoparticles

2021 ◽  
Author(s):  
Yan nv Guo ◽  
haiyan zhu ◽  
He Zhao ◽  
Qinfu Zhao ◽  
Caihua Zhou ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Cerium Dioxide ◽  
Theoretical Study ◽  
Catalytic Performance ◽  
Single Atom ◽  
Pd Nanoparticle ◽  
Single Atoms ◽  
Nanoparticle Clusters ◽  
Supported Palladium ◽  
Reduction Of Co2

Pd/CeO2 catalysts show superior catalytic performance owing to their optimal cycling activity and stability. In this study, single-atom Pd and eight-atoms Pd nanoparticle clusters were supported on the surface of...

Tunable Carbon Surface from Mono- to Multi-Metallic Single Atoms

2020 ◽  
Author(s):  
Weihong Lai ◽  
Heng Wang ◽  
Quan jiang ◽  
Zichao Yan ◽  
Hanwen Liu ◽  
...  
Keyword(s):  
Synergistic Effects ◽  
Structural Evolution ◽  
Charge Compensation ◽  
Catalytic Reactions ◽  
Single Atom ◽  
Carbon Surface ◽  
Hydrogen Electrode ◽  
Single Atoms ◽  
Mass Activity ◽  
Co Doped

<p>Herein, we develop a non-selective charge compensation strategy to prepare multi-single-atom doped carbon (MSAC) in which a sodium p-toluenesulfonate (PTS-Na) doped polypyrrole (S-PPy) polymer is designed to anchor discretionary mixtures of multiple metal cations, including iron (Fe<sup>3+</sup>), cobalt (Co<sup>3+</sup>), ruthenium (Ru<sup>3+</sup>), palladium (Pd<sup>2+</sup>), indium (In<sup>3+</sup>), iridium (Ir<sup>2+</sup>), and platinum (Pt<sup>2+</sup>) . As illustrated in Figure 1, the carbon surface can be tuned with different level of compositional complexities, including unary Pt<sub>1</sub>@NC, binary (MSAC-2, (PtFe)<sub>1</sub>@NC), ternary (MSAC-3, (PtFeIr)<sub>1</sub>@NC), quaternary (MSAC-4, (PtFeIrRu)<sub>1</sub>@NC), quinary (MSAC-5, (PtFeIrRuCo)<sub>1</sub>@NC), senary (MSAC-6, (PtFeIrRuCoPd)<sub>1</sub>@NC), and septenary (MSAC-7, (PtFeIrRuCoPdIn)<sub>1</sub>@NC) samples. The structural evolution of carbon surface dictates the activities of both ORR and HER. The senary MSAC-6 achieves the ORR mass activity of 18.1 A·mg<sub>metal</sub><sup>-1</sup> at 0.9 V (Vs reversible hydrogen electrode (RHE)) over 30K cycles, which is 164 times higher than that of commercial Pt/C. The quaternary MSAC-4 presented a comparable HER catalytic capability with that of Pt/C. These results indicate that the highly complexed carbon surface can enhance its ability over general electrochemical catalytic reactions. The mechanisms regarding of the ORR and HER activities of the alternated carbon surface are also theoretically and experimentally investigated in this work, showing that the synergistic effects amongst the co-doped atoms can activate or inactivate certain single-atom sites.</p>

Improving peroxymonosulfate activation by copper ion-saturated adsorbent-based single atom catalysts for the degradation of organic contaminants: electron-transfer mechanism and the key role of Cu single atoms

2021 ◽  
Author(s):  
Jingwen Pan ◽  
Baoyu Gao ◽  
Pijun Duan ◽  
Kangying Guo ◽  
Muhammad Akram ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Organic Contaminants ◽  
High Salinity ◽  
Copper Ion ◽  
Single Atom ◽  
Electron Transfer Mechanism ◽  
Persulfate Oxidation ◽  
Single Atoms ◽  
Oxidation Technology

Nonradical pathway-based persulfate oxidation technology is considered to be a promising method for high-salinity organic wastewater treatment.

Nanoporous bismuth for the electrocatalytic reduction of CO2 to formate

2021 ◽  
Author(s):  
Xiaoyan Wang ◽  
Zhiyong Wang ◽  
Xianbo Jin
Keyword(s):  
Electrocatalytic Reduction ◽  
Electrocatalytic Performance ◽  
Primary Particles ◽  
Reduction Of Co2 ◽  
Electrocatalytic Reduction Of Co2

The size of the primary particles of nanoporous Bi has a great impact on the electrocatalytic performance of Bi for the reduction of CO2 to formate.

scholarly journals Regulating coordination number in atomically dispersed Pt species on defect-rich graphene for n-butane dehydrogenation reaction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaowen Chen ◽  
Mi Peng ◽  
Xiangbin Cai ◽  
Yunlei Chen ◽  
Zhimin Jia ◽  
...  
Keyword(s):  
Coordination Number ◽  
Density Functional ◽  
Activation Barrier ◽  
Density Functional Theory Calculation ◽  
Catalytic Performance ◽  
Atomic Level ◽  
Metal Nanoparticle ◽  
Single Atom ◽  
Nano Structure ◽  
Theory Calculation

AbstractMetal nanoparticle (NP), cluster and isolated metal atom (or single atom, SA) exhibit different catalytic performance in heterogeneous catalysis originating from their distinct nanostructures. To maximize atom efficiency and boost activity for catalysis, the construction of structure–performance relationship provides an effective way at the atomic level. Here, we successfully fabricate fully exposed Pt3 clusters on the defective nanodiamond@graphene (ND@G) by the assistance of atomically dispersed Sn promoters, and correlated the n-butane direct dehydrogenation (DDH) activity with the average coordination number (CN) of Pt-Pt bond in Pt NP, Pt3 cluster and Pt SA for fundamentally understanding structure (especially the sub-nano structure) effects on n-butane DDH reaction at the atomic level. The as-prepared fully exposed Pt3 cluster catalyst shows higher conversion (35.4%) and remarkable alkene selectivity (99.0%) for n-butane direct DDH reaction at 450 °C, compared to typical Pt NP and Pt SA catalysts supported on ND@G. Density functional theory calculation (DFT) reveal that the fully exposed Pt3 clusters possess favorable dehydrogenation activation barrier of n-butane and reasonable desorption barrier of butene in the DDH reaction.

scholarly journals Shifting the scaling relations of single-atom catalysts for facile methane activation by tuning the coordination number

2021 ◽  
Author(s):  
Changhyeok Choi ◽  
Sungho Yoon ◽  
Yousung Jung
Keyword(s):  
Transition State ◽  
Coordination Number ◽  
Active Sites ◽  
Methane Activation ◽  
Single Atom ◽  
Scaling Relations ◽  
Scaling Relationship ◽  
Relationship Of

The scaling relationship of methane activation via a radical-like transition state shifts toward a more reactive region with decreasing coordination number of the active sites.

Prominent Electron Penetration through Ultrathin Graphene Layer from FeNi Alloy for Efficient Reduction of CO2 to CO

ChemSusChem ◽  
2017 ◽  
Vol 10 (15) ◽  
pp. 3044-3048 ◽  
Author(s):  
Qingyuan Bi ◽  
Xin Wang ◽  
Feng Gu ◽  
Xianlong Du ◽  
Hongliang Bao ◽  
...  
Keyword(s):  
Graphene Layer ◽  
Efficient Reduction ◽  
Reduction Of Co2 ◽  
Feni Alloy
Sign in / Sign up

Export Citation Format

Share Document