Highly active and stable Ir nanoclusters derived from Ir1/MgAl2O4 single-atom catalysts

2021 ◽  
Vol 154 (13) ◽  
pp. 131105
Author(s):  
Jingyi Yang ◽  
Jingcai Zhang ◽  
Qike Jiang ◽  
Yang Su ◽  
Yitao Cui ◽  
...  
Keyword(s):  
Single Atom ◽  
Highly Active

Nanotubular OMS-2 Supported Single-Atom Platinum Catalysts Highly Active for Benzene Oxidation

2021 ◽  
Author(s):  
Xiuqing Hao ◽  
Lingyun Dai ◽  
Jiguang Deng ◽  
Yuxi Liu ◽  
Lin Jing ◽  
...  
Keyword(s):  
Platinum Catalysts ◽  
Single Atom ◽  
Benzene Oxidation ◽  
Highly Active

scholarly journals Interfacial-confined coordination to single-atom nanotherapeutics

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Limei Qin ◽  
Jie Gan ◽  
Dechao Niu ◽  
Yueqiang Cao ◽  
Xuezhi Duan ◽  
...  
Keyword(s):  
Therapeutic Strategy ◽  
Single Atom ◽  
Oxygen Species ◽  
High Quality ◽  
Efficient Energy ◽  
Coordination Strategy ◽  
Single Atoms ◽  
Highly Active ◽  
Narrow Bandgap ◽  
Catalytic Sites

AbstractPursuing and developing effective methodologies to construct highly active catalytic sites to maximize the atomic and energy efficiency by material engineering are attractive. Relative to the tremendous researches of carbon-based single atom systems, the construction of bio-applicable single atom materials is still in its infancy. Herein, we propose a facile and general interfacial-confined coordination strategy to construct high-quality single-atom nanotherapeutic agent with Fe single atoms being anchored on defective carbon dots confined in a biocompatible mesoporous silica nanoreactor. Furthermore, the efficient energy conversion capability of silica-based Fe single atoms system has been demonstrated on the basis of the exogenous physical photo irradiation and endogenous biochemical reactive oxygen species stimulus in the confined mesoporous network. More importantly, the highest photothermal conversion efficiency with the mechanism of increased electron density and narrow bandgap of this single atom structure in defective carbon was proposed by the theoretical DFT calculations. The present methodology provides a scientific paradigm to design and develop versatile single atom nanotherapeutics with adjustable metal components and tune the corresponding reactions for safe and efficient tumor therapeutic strategy.

Selective Hydrogenation on a Highly Active Single-Atom Catalyst of Palladium Dispersed on Ceria Nanorods by Defect Engineering

2020 ◽  
Vol 12 (51) ◽  
pp. 57569-57577
Author(s):  
Zhijun Li ◽  
Xiuli Dong ◽  
Mingyang Zhang ◽  
Leipeng Leng ◽  
Wenxing Chen ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Single Atom ◽  
Defect Engineering ◽  
Highly Active

Highly Active Fe/Pt Single-Atom Bifunctional Electrocatalysts on Biomass-Derived Carbon

2020 ◽  
Author(s):  
Lijuan Cao ◽  
Xilong Wang ◽  
Chen Yang ◽  
Jiajia Lu ◽  
Xiaoyue Shi ◽  
...  
Keyword(s):  
Single Atom ◽  
Highly Active ◽  
Bifunctional Electrocatalysts

scholarly journals Natural mineral modulated single atom catalyst for effective water treatment

2021 ◽  
Author(s):  
Xiongbo Dong ◽  
Zitong Chen ◽  
Aidong Tang ◽  
Dionysios Dionysiou ◽  
Yang Huaming
Keyword(s):  
Water Treatment ◽  
Environmental Remediation ◽  
Theoretical Calculations ◽  
Single Atom ◽  
Wastewater Reclamation ◽  
Natural Mineral ◽  
Highly Active ◽  
Porous Architecture ◽  
Optimal Coordination ◽  
Turn Over Frequency

Abstract Single atom catalysts (SACs) have been growing as an emerging “hot” topic in environmental remediation. Their performance can be rationally optimized via modulating spatial coordination configuration and porous structure of SACs, which is still challenging. Herein, a novel Si, N co-coordinated cobalt SACs (p-CoSi1N3@D) with 3D freestanding architecture was tailored via employing natural mineral (diatomite) as Si source and porous template. Theoretical calculations and experimental analysis reveal that Si substitution dramatically decreases electronegativity of CoN4 moieties and thus accelerates interaction and electron transfer between peroxymonosulfate and Co single atom center. Moreover, p-CoSi1N3@D inherits hierarchically porous architecture of diatomite, providing more accessible cobalt sites and open diffusion channels for peroxymonosulfate and contaminants in water treatment applications. Thanks to optimal coordination structure and porous architecture, p-CoSi1N3@D can serve as highly active catalyst toward peroxymonosulfate activation, with a turn-over frequency of 299.8 min− 1 for bisphenol A degradation, surpassing those of catalysts with transition metal SACs or oxides in disclosed literature. This work provides a novel vision for development of SACs towards wastewater reclamation.

scholarly journals A Cobalt-Iron Double-Atom Catalyst for the Oxygen Evolution Reaction

2019 ◽  
Author(s):  
Lichen Bai ◽  
Chia-Shuo Hsu ◽  
Duncan Alexander ◽  
Hao Ming Chen ◽  
Xile Hu
Keyword(s):  
Oxygen Evolution ◽  
Active Site ◽  
Oxygen Evolution Reaction ◽  
Active Sites ◽  
Single Atom ◽  
X Ray ◽  
Highly Active ◽  
Cobalt Iron ◽  
X Ray Absorption

Single atom catalysts exhibit well-defined active sites and potentially maximum atomic efficiency. However, they are unsuitable for reactions that benefit from bimetallic promotion such as the oxygen evolution reaction (OER) in alkaline medium. Here we show that a single atom Co precatalyst can be in-situ transformed into a Co-Fe double atom catalyst for OER. This catalyst exhibits one of the highest turnover frequencies among metal oxides. Electrochemical, microscopic, and spectroscopic data including those from operando X-ray absorption spectroscopy, reveal a dimeric Co-Fe moiety as the active site of the catalyst. This work demonstrates double-atom catalysis as a promising approach for the developed of defined and highly active OER catalysts.

A review of non-precious metal single atom confined nanomaterials in different structural dimensions (1D–3D) as highly active oxygen redox reaction electrocatalysts

2020 ◽  
Vol 8 (5) ◽  
pp. 2222-2245 ◽  
Author(s):  
Jin Liu ◽  
Hao Zhang ◽  
Ming Qiu ◽  
Zehua Peng ◽  
Michael K. H. Leung ◽  
...  
Keyword(s):  
Redox Reaction ◽  
Precious Metal ◽  
Redox Reactions ◽  
Active Oxygen ◽  
Single Atom ◽  
Highly Active ◽  
Structural Dimensions

Different dimensional supports for non-precious-metal single-atom catalysts play significant roles in their fabrication and electrocatalytic activities for oxygen redox reactions.

Highly active dye-sensitized photocatalytic H2 evolution catalyzed by a single-atom Pt cocatalyst anchored onto g-C3N4 nanosheets under long-wavelength visible light irradiation

2018 ◽  
Vol 42 (17) ◽  
pp. 14083-14086 ◽  
Author(s):  
Yuan Xue ◽  
Yonggang Lei ◽  
Xiangyu Liu ◽  
Yanan Li ◽  
Wanan Deng ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Single Atom ◽  
Eosin Y ◽  
H2 Evolution ◽  
Long Wavelength ◽  
Dye Sensitized ◽  
Highly Active ◽  
Photocatalytic H2 Evolution

A single-atom Pt cocatalyst anchored onto g-C3N4 nanosheets could efficiently catalyze H2 evolution from an Eosin Y-sensitized system under 520 nm irradiation.

A mechanistic study of B36-supported atomic Au promoted CO2 electroreduction to formic acid

2019 ◽  
Vol 7 (23) ◽  
pp. 13935-13940 ◽  
Author(s):  
Wen-Ying Li ◽  
Xiang Zhao ◽  
Jing-Shuang Dang
Keyword(s):  
Formic Acid ◽  
Single Atom ◽  
Mechanistic Study ◽  
Highly Active ◽  
Co2 Electroreduction

A B36 nanoflake is capable of capturing atomic Au and such a single-atom catalyst is highly active and selective to promote the electroreduction of CO2 to formic acid.

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