Immobilizing single atom catalytic sites onto highly reduced carbon hosts: Fe–N4/CNT as a durable oxygen reduction catalyst for Na–air batteries

2020 ◽  
Vol 8 (36) ◽  
pp. 18891-18902
Author(s):  
Woo Yeong Noh ◽  
Eun Mi Kim ◽  
Kwang Young Kim ◽  
Jin Hyun Kim ◽  
Hu Young Jeong ◽  
...  
Keyword(s):  
Metal Ions ◽  
Oxygen Reduction ◽  
Carbon Support ◽  
Single Atom ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Catalytic Sites ◽  
Metal Support ◽  
Oxygen Reduction Catalyst

Immobilizing metal ions on a carbon support usually involves severe aggregation (sintering) and loose attachment of metal ions owing to a weak metal–support interaction.

scholarly journals Electronic metal–support interaction modulates single-atom platinum catalysis for hydrogen evolution reaction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yi Shi ◽  
Zhi-Rui Ma ◽  
Yi-Ying Xiao ◽  
Yun-Chao Yin ◽  
Wen-Mao Huang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Structure Activity Relationship ◽  
Atomic Level ◽  
Single Atom ◽  
Activity Relationship ◽  
Support Interaction ◽  
Structure Activity ◽  
Metal Support Interaction ◽  
Metal Support

AbstractTuning metal–support interaction has been considered as an effective approach to modulate the electronic structure and catalytic activity of supported metal catalysts. At the atomic level, the understanding of the structure–activity relationship still remains obscure in heterogeneous catalysis, such as the conversion of water (alkaline) or hydronium ions (acid) to hydrogen (hydrogen evolution reaction, HER). Here, we reveal that the fine control over the oxidation states of single-atom Pt catalysts through electronic metal–support interaction significantly modulates the catalytic activities in either acidic or alkaline HER. Combined with detailed spectroscopic and electrochemical characterizations, the structure–activity relationship is established by correlating the acidic/alkaline HER activity with the average oxidation state of single-atom Pt and the Pt–H/Pt–OH interaction. This study sheds light on the atomic-level mechanistic understanding of acidic and alkaline HER, and further provides guidelines for the rational design of high-performance single-atom catalysts.

Ultrastable single-atom gold catalysts with strong covalent metal-support interaction (CMSI)

Nano Research ◽  
2015 ◽  
Vol 8 (9) ◽  
pp. 2913-2924 ◽  
Author(s):  
Botao Qiao ◽  
Jin-Xia Liang ◽  
Aiqin Wang ◽  
Cong-Qiao Xu ◽  
Jun Li ◽  
...  
Keyword(s):  
Gold Catalysts ◽  
Single Atom ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support

Influence of sp3–sp2 Carbon Nanodomains on Metal/Support Interaction, Catalyst Durability, and Catalytic Activity for the Oxygen Reduction Reaction

2016 ◽  
Vol 8 (35) ◽  
pp. 23260-23269 ◽  
Author(s):  
Carlos A. Campos-Roldán ◽  
Guadalupe Ramos-Sánchez ◽  
Rosa G. Gonzalez-Huerta ◽  
Jorge R. Vargas García ◽  
Perla B. Balbuena ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Catalyst Durability

Vapor-Phase Self-Assembly to Generate Single Atom Catalysts with Weak Metal-Support Interaction

2021 ◽  
Author(s):  
Henyyu Li ◽  
Qiang Wan ◽  
Congcong Du ◽  
QiuNan Liu ◽  
Jiamin Qi ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Self Assembly ◽  
Single Atom ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support

scholarly journals Platinum Deposited Nitrogen-Doped Vertically Aligned Carbon Nanofibers as Methanol Tolerant Catalyst for Oxygen Reduction Reaction with Improved Durability

Applied Nano ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 303-318
Author(s):  
Ayyappan Elangovan ◽  
Jiayi Xu ◽  
Archana Sekar ◽  
Sabari Rajendran ◽  
Bin Liu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Nitrogen Doping ◽  
Carbon Nanofiber ◽  
Three Dimensional ◽  
Reduction Reaction ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Vertically Aligned

Nitrogen doping in carbon materials can modify the employed carbon material’s electronic and structural properties, which helps in creating a stronger metal-support interaction. In this study, the role of nitrogen doping in improving the durability of Pt catalysts supported on a three-dimensional vertically aligned carbon nanofiber (VACNF) array towards oxygen reduction reaction (ORR) was explored. The nitrogen moieties present in the N-VACNF enhanced the metal-support interaction and contributed to a reduction in the Pt particle size from 3.1 nm to 2.3 nm. The Pt/N-VACNF catalyst showed better durability when compared to Pt/VACNF and Pt/C catalysts with similar Pt loading. DFT calculations validated the increase in the durability of the Pt NPs with an increase in pyridinic N and corroborated the molecular ORR pathway for Pt/N-VACNF. Moreover, the Pt/N-VACNF catalyst was found to have excellent tolerance towards methanol crossover.

scholarly journals Single-Atom Catalysts: A Review of Synthesis Strategies and Their Potential for Biofuel Production

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1470
Author(s):  
Nurul Asikin-Mijan ◽  
Haslinda Mohd Sidek ◽  
Abdulkareem G. AlSultan ◽  
Nurul Ahtirah Azman ◽  
Nur Athirah Adzahar ◽  
...  
Keyword(s):  
Future Development ◽  
Catalytic Performance ◽  
Biofuel Production ◽  
Single Atom ◽  
Support Interaction ◽  
Metal Atoms ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Single Atom Alloys

Biofuels have been derived from various feedstocks by using thermochemical or biochemical procedures. In order to synthesise liquid and gas biofuel efficiently, single-atom catalysts (SACs) and single-atom alloys (SAAs) have been used in the reaction to promote it. SACs are made up of single metal atoms that are anchored or confined to a suitable support to keep them stable, while SAAs are materials generated by bi- and multi-metallic complexes, where one of these metals is atomically distributed in such a material. The structure of SACs and SAAs influences their catalytic performance. The challenge to practically using SACs in biofuel production is to design SACs and SAAs that are stable and able to operate efficiently during reaction. Hence, the present study reviews the system and configuration of SACs and SAAs, stabilisation strategies such as mutual metal support interaction and geometric coordination, and the synthesis strategies. This paper aims to provide useful and informative knowledge about the current synthesis strategies of SACs and SAAs for future development in the field of biofuel production.

Uniform Pt nanoparticles supported on urchin-like mesoporous TiO2 hollow spheres as stable electrocatalysts for the oxygen reduction reaction

Nanoscale ◽  
2020 ◽  
Vol 12 (19) ◽  
pp. 10656-10663 ◽  
Author(s):  
Suqiong He ◽  
Chuxin Wu ◽  
Zhen Sun ◽  
Yang Liu ◽  
Rongtao Hu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hollow Spheres ◽  
Pt Nanoparticles ◽  
Reduction Reaction ◽  
Mesoporous Tio2 ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Tio2 Hollow Spheres

Pt/UMTHS exhibited better ORR stability than the commercial Pt/C due to the strong metal support interaction and the effect of spatial restriction from the unique structure.

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