scholarly journals Recent Advances in Layered-Double-Hydroxides Based Noble Metal Nanoparticles Efficient Electrocatalysts

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2644
Author(s):  
Zexuan Zhang ◽  
Peilong Li ◽  
Xin Zhang ◽  
Cun Hu ◽  
Yuwen Li ◽  
...  
Keyword(s):  
Noble Metal ◽  
Layered Double Hydroxides ◽  
Active Sites ◽  
Clean Energy ◽  
Metal Catalysts ◽  
Metal Species ◽  
Energy Crisis ◽  
Noble Metal Catalysts ◽  
Recent Advances ◽  
Double Hydroxides

With the energy crisis and environmental pollution becoming more and more serious, it is urgent to develop renewable and clean energy. Hydrogen production from electrolyzed water is of great significance to solve the energy crisis and environmental problems in the future. Recently, layered double hydroxides (LDHs) materials have been widely studied in the electrocatalysis field, due to their unique layered structure, tunable metal species and highly dispersed active sites. Moreover, the LDHs supporting noble metal catalysts obtained through the topotactic transformation of LDHs precursors significantly reduce the energy barrier of electrolyzing water, showing remarkable catalytic activity, good conductivity and excellent durability. In this review, we give an overview of recent advances on LDHs supporting noble metal catalysts, from a brief introduction, to their preparation and modification methods, to an overview of their application in the electrocatalysis field, as well as the challenges and outlooks in this promising field on the basis of current development.

scholarly journals Recent Advances in Single-Atom Electrocatalysts for Oxygen Reduction Reaction

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-51 ◽  
Author(s):  
Junxing Han ◽  
Juanjuan Bian ◽  
Chunwen Sun
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Active Sites ◽  
Reduction Reaction ◽  
Metal Catalysts ◽  
Single Atom ◽  
Noble Metal Catalysts ◽  
Recent Advances ◽  
Platinum Group

Oxygen reduction reaction (ORR) plays significant roles in electrochemical energy storage and conversion systems as well as clean synthesis of fine chemicals. However, the ORR process shows sluggish kinetics and requires platinum-group noble metal catalysts to accelerate the reaction. The high cost, rare reservation, and unsatisfied durability significantly impede large-scale commercialization of platinum-based catalysts. Single-atom electrocatalysts (SAECs) featuring with well-defined structure, high intrinsic activity, and maximum atom efficiency have emerged as a novel field in electrocatalytic science since it is promising to substitute expensive platinum-group noble metal catalysts. However, finely fabricating SAECs with uniform and highly dense active sites, fully maximizing the utilization efficiency of active sites, and maintaining the atomically isolated sites as single-atom centers under harsh electrocatalytic conditions remain urgent challenges. In this review, we summarized recent advances of SAECs in synthesis, characterization, oxygen reduction reaction (ORR) performance, and applications in ORR-related H2O2 production, metal-air batteries, and low-temperature fuel cells. Relevant progress on tailoring the coordination structure of isolated metal centers by doping other metals or ligands, enriching the concentration of single-atom sites by increasing metal loadings, and engineering the porosity and electronic structure of the support by optimizing the mass and electron transport are also reviewed. Moreover, general strategies to synthesize SAECs with high metal loadings on practical scale are highlighted, the deep learning algorithm for rational design of SAECs is introduced, and theoretical understanding of active-site structures of SAECs is discussed as well. Perspectives on future directions and remaining challenges of SAECs are presented.

scholarly journals Self-regenerative noble metal catalysts supported on high-entropy oxides

2020 ◽  
Vol 56 (95) ◽  
pp. 15056-15059
Author(s):  
Hao Chen ◽  
Yifan Sun ◽  
Shize Yang ◽  
Hui Wang ◽  
Wojciech Dmowski ◽  
...  
Keyword(s):  
Noble Metal ◽  
Metal Catalysts ◽  
Metal Species ◽  
Temperature Dependent ◽  
High Entropy ◽  
Noble Metal Catalysts ◽  
Entropic Effects

A reversible temperature-dependent dissolution–exsolution process was discovered for noble metal species supported on high-entropy oxides, which indicates the potential to exploit the enhanced entropic effects to access self-regenerative catalysts.

Recent Advances in Selective Hydrogenation of Crotonaldehyde over Noble Metal Catalysts

2020 ◽  
Vol 34 (4) ◽  
pp. 366-377
Author(s):  
继青 鲁 ◽  
万彬 郑 ◽  
一鸣 胡 ◽  
艳明 李 ◽  
岑 汤
Keyword(s):  
Noble Metal ◽  
Selective Hydrogenation ◽  
Metal Catalysts ◽  
Noble Metal Catalysts ◽  
Recent Advances

Atomically dispersed Rh-doped NiFe layered double hydroxides: precise location of Rh and promoting hydrazine electrooxidation properties

Nanoscale ◽  
2020 ◽  
Author(s):  
Yu-Fei Song ◽  
Guihao Liu ◽  
Zelin Wang ◽  
Tianyang Shen ◽  
Xusheng Zheng ◽  
...  
Keyword(s):  
Noble Metal ◽  
Layered Double Hydroxides ◽  
Active Sites ◽  
Precise Location ◽  
Double Hydroxides ◽  
Hydrazine Electrooxidation

Noble metal-based catalysts have sparked huge attention owing to their intriguing activity and selectivity. Revealing the noble metal active sites and keeping them in a form of stable and high...

scholarly journals Recent Advances in Noble Metal Catalysts for Hydrogen Production from Ammonia Borane

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 788 ◽  
Author(s):  
Mengmeng Liu ◽  
Liu Zhou ◽  
Xianjin Luo ◽  
Chao Wan ◽  
Lixin Xu
Keyword(s):  
Hydrogen Storage ◽  
Noble Metal ◽  
Fossil Fuels ◽  
Ammonia Borane ◽  
Metal Catalysts ◽  
Hydrogen Release ◽  
Hydrogen Energy ◽  
High Hydrogen ◽  
Noble Metal Catalysts ◽  
Recent Advances

Interest in chemical hydrogen storage has increased, because the supply of fossil fuels are limited and the harmful effects of burning fossil fuels on the environment have become a focus of public concern. Hydrogen, as one of the energy carriers, is useful for the sustainable development. However, it is widely known that controlled storage and release of hydrogen are the biggest barriers in large-scale application of hydrogen energy. Ammonia borane (NH3BH3, AB) is deemed as one of the most promising hydrogen storage candidates on account of its high hydrogen to mass ratio and environmental benignity. Development of efficient catalysts to further improve the properties of chemical kinetics in the dehydrogenation of AB under appropriate conditions is of importance for the practical application of this system. In previous studies, a variety of noble metal catalysts and their supported metal catalysts (Pt, Pd, Au, Rh, etc.) have presented great properties in decomposing the chemical hydride to generate hydrogen, thus, promoting their application in dehydrogenation of AB is urgent. We analyzed the hydrolysis of AB from the mechanism of hydrogen release reaction to understand more deeply. Based on these characteristics, we aimed to summarize recent advances in the development of noble metal catalysts, which had excellent activity and stability for AB dehydrogenation, with prospect towards realization of efficient noble metal catalysts.

scholarly journals Active sites engineering leads to exceptional ORR and OER bifunctionality in P,N Co-doped graphene frameworks

2017 ◽  
Vol 10 (5) ◽  
pp. 1186-1195 ◽  
Author(s):  
Guo-Liang Chai ◽  
Kaipei Qiu ◽  
Mo Qiao ◽  
Maria-Magdalena Titirici ◽  
Congxiao Shang ◽  
...  
Keyword(s):  
Noble Metal ◽  
Active Sites ◽  
Metal Catalysts ◽  
Noble Metal Catalysts ◽  
Highly Efficient ◽  
Doped Graphene ◽  
Co Doped

Highly efficient bifunctional P,N co-doped graphene framework (PNGF) with both ORR and OER activities that are superior to noble metal catalysts.

Recent advances in phosphorus containing noble metal electrocatalysts for direct liquid fuel cells

Nanoscale ◽  
2021 ◽  
Vol 13 (38) ◽  
pp. 16052-16069
Author(s):  
Jiachen Zhang ◽  
Li Wu ◽  
Lin Xu ◽  
Dongmei Sun ◽  
Hanjun Sun ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Electrochemical Performance ◽  
Noble Metal ◽  
Liquid Fuel ◽  
Metal Catalysts ◽  
Synthetic Methods ◽  
Noble Metal Catalysts ◽  
Recent Advances ◽  
Phosphorus Containing

Here, we summarize our previous efforts and reports from other groups on P containing noble metal catalysts for direct liquid fuel cells, including synthetic methods, composition, shape and electrochemical performance.

Fe-based non-noble metal catalysts with dual active sites of nanosized metal carbide and single-atomic species for oxygen reduction reaction

2020 ◽  
Vol 8 (42) ◽  
pp. 22379-22388
Author(s):  
Gil-Seong Kang ◽  
Jue-Hyuk Jang ◽  
Su-Young Son ◽  
Cheol-Ho Lee ◽  
Youn-Ki Lee ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Active Sites ◽  
Reduction Reaction ◽  
Metal Catalysts ◽  
Metal Carbide ◽  
Noble Metal Catalysts ◽  
Active Metal ◽  
Atomic Species

For increasing the active metal sites densities on the M–N–C catalyst the facile strategy was presented through the use of dual active sites such as single atomic Fe–Nx species and nanosized Fe3C with ∼2 nm.

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