Maximizing the utility of single atom electrocatalysts on a 3D graphene nanomesh

2019 ◽  
Vol 7 (26) ◽  
pp. 15575-15579 ◽  
Author(s):  
Kai Chi ◽  
Zhongxin Chen ◽  
Fei Xiao ◽  
Wei Guo ◽  
Wei Xi ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Plane Surface ◽  
High Density ◽  
Single Atom ◽  
3D Graphene ◽  
Single Atoms ◽  
Out Of Plane ◽  
Doped Graphene ◽  
Graphene Nanomesh ◽  
Vertically Aligned

Vertically aligned N-doped graphene nanomesh arrays (VNGNMAs) with a high density of in-plane surface holes and out-of-plane interconnected, vertically aligned structures as a scaffold can facilitate the diffusion of reactants and maximize the utility of single atoms in the liquid phase.

Computational screening of efficient graphene-supported transition metal single atom catalysts toward the oxygen reduction reaction

2020 ◽  
Vol 8 (37) ◽  
pp. 19319-19327 ◽  
Author(s):  
Lei Li ◽  
Rao Huang ◽  
Xinrui Cao ◽  
Yuhua Wen
Keyword(s):  
Transition Metal ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Single Atom ◽  
Nitrogen Doped ◽  
Single Atoms ◽  
Computational Screening ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Transition metal single atoms anchored on nitrogen-doped graphene toward the oxygen reduction reaction have been screened.

2D-organic framework confined metal single atoms with the loading reaching the theoretical limit

2020 ◽  
Vol 7 (10) ◽  
pp. 2726-2733
Author(s):  
Chao Lin ◽  
Hao Zhang ◽  
Xiaokai Song ◽  
Dong-Hyung Kim ◽  
Xiaopeng Li ◽  
...  
Keyword(s):  
Air Flow ◽  
High Density ◽  
Single Atom ◽  
Theoretical Limit ◽  
Single Atoms ◽  
Synthetic Strategy ◽  
Flow Batteries ◽  
Organic Framework

A synthetic strategy utilizing a predesigned organic framework is demonstrated to construct high-density single-atom catalysts for long-lasting zinc–air flow batteries.

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>

Alumina-Supported Palladium–Silver Bimetallic Catalysts with Single-Atom Pd1 Sites in the Liquid-Phase Hydrogenation of Substituted Alkynes

2020 ◽  
Vol 61 (6) ◽  
pp. 869-878
Author(s):  
A. V. Rassolov ◽  
G. O. Bragina ◽  
G. N. Baeva ◽  
I. S. Mashkovsky ◽  
A. Yu. Stakheev
Keyword(s):  
Liquid Phase ◽  
Bimetallic Catalysts ◽  
Single Atom ◽  
Liquid Phase Hydrogenation ◽  
Supported Palladium ◽  
Palladium Silver

Single–atom manganese and nitrogen co-doped graphene as low-cost catalysts for the efficient CO oxidation at room temperature

2021 ◽  
Vol 536 ◽  
pp. 147809
Author(s):  
Mingming Luo ◽  
Zhao Liang ◽  
Chao Liu ◽  
Xiaopeng Qi ◽  
Mingwei Chen ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Room Temperature ◽  
Low Cost ◽  
Single Atom ◽  
Doped Graphene ◽  
Co Doped

Single atom catalysts supported on N-doped graphene toward fast kinetic Li−S batteries: a theoretical study

2021 ◽  
Author(s):  
Xu Han ◽  
Zeyun Zhang ◽  
Xuefei Xu
Keyword(s):  
Theoretical Study ◽  
Single Atom ◽  
Discharge Process ◽  
Fast Kinetics ◽  
Shuttle Effect ◽  
Sufficient Stability ◽  
Doped Graphene ◽  
Fast Kinetic ◽  
Kinetics Of ◽  
Charge Discharge

To suppress the shuttle effect of lithium polysulfides and promote fast kinetics of charge−discharge process in Li−S batteries, it is essential to search promising catalysts with sufficient stability and high...

Controllable Coordination of Phosphotungstic Acid-Modified Carbon Matrix for Anchoring Different Sizes of Pt Species: From Single Atoms, Subnanoclusters to Nanoparticles

2021 ◽  
Author(s):  
Jiazhe Li ◽  
Zhiyuan Yan ◽  
Lingxiang Bao ◽  
Cheng-Hui Sun ◽  
Si-Ping Pang
Keyword(s):  
Phosphotungstic Acid ◽  
Carbon Matrix ◽  
High Density ◽  
Coordination Environment ◽  
Single Atoms

Pt species with different sizes uniformly dispersed on phosphotungstic (PTA) acid modified carbon matrix (PTA-C) were controllably synthesized by manipulating the coordination environment. The results indicate that high-density and well-defined...

Synthesis of Cu Single Atoms Supported on Mesoporous Graphitic Carbon Nitride and Their Application in Liquid-Phase Aerobic Oxidation of Cyclohexene

ACS Catalysis ◽  
2021 ◽  
pp. 7863-7875
Author(s):  
Julia Büker ◽  
Xiubing Huang ◽  
Johannes Bitzer ◽  
Wolfgang Kleist ◽  
Martin Muhler ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Carbon Nitride ◽  
Aerobic Oxidation ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Single Atoms

Cobalt Single Atoms Embedded in Nitrogen‐Doped Graphene for Selective Oxidation of Benzyl Alcohol by Activated Peroxymonosulfate

Small ◽  
2021 ◽  
pp. 2004579
Author(s):  
Jiaquan Li ◽  
Shiyong Zhao ◽  
Lianji Zhang ◽  
San Ping Jiang ◽  
Shi‐Ze Yang ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Selective Oxidation ◽  
Nitrogen Doped ◽  
Single Atoms ◽  
Oxidation Of Benzyl Alcohol ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

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.

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