scholarly journals Recent Advancements and Future Prospects of Noble Metal-Based Heterogeneous Nanocatalysts for Oxygen Reduction and Hydrogen Evolution Reactions

2020 ◽  
Vol 10 (21) ◽  
pp. 7708
Author(s):  
Dinesh Bhalothia ◽  
Lucky Krishnia ◽  
Shou-Shiun Yang ◽  
Che Yan ◽  
Wei-Hao Hsiung ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Reduction Reaction ◽  
Practical Applications ◽  
Storage Devices ◽  
Current State ◽  
Energy Conversion And Storage ◽  
Alternative Power ◽  
And Storage

The oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) both are key electrochemical reactions for enabling next generation alternative-power supply technologies. Despite great merits, both of these reactions require robust electrocatalysts for lowering the overpotential and promoting their practical applications in energy conversion and storage devices. Although, noble metal-based catalysts (especially Pt-based catalysts) are at the forefront in boosting the ORR and HER kinetics, high cost, limited availability, and poor stability in harsh redox conditions make them unfit for scalable use. To this end, various strategies including downsizing the catalyst size, reducing the noble metal, and increasing metal utilization have been adopted to appropriately balance the performance and economic issues. This mini-review presents an overview of the current state of the technological advancements in noble metal-based heterogeneous nanocatalysts (NCs) for both ORR and HER applications. More specifically, we focused on establishing the structure–performance correlation.

scholarly journals Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1525
Author(s):  
Williane da Silva Freitas ◽  
Pedro Pablo Machado Pico ◽  
Alessandra D’Epifanio ◽  
Barbara Mecheri
Keyword(s):  
Energy Conversion ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Electrochemical Impedance ◽  
Carbon Matrix ◽  
Onset Potential ◽  
Storage Devices ◽  
Synthesis Strategy ◽  
Energy Conversion And Storage ◽  
And Storage

The development of electrocatalysts for energy conversion and storage devices is of paramount importance to promote sustainable development. Among the different families of materials, catalysts based on transition metals supported on a nitrogen-containing carbon matrix have been found to be effective catalysts toward oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) with high potential to replace conventional precious metal-based catalysts. In this work, we developed a facile synthesis strategy to obtain a Fe-N-C bifunctional ORR/HER catalysts, involving wet impregnation and pyrolysis steps. Iron (II) acetate and imidazole were used as iron and nitrogen sources, respectively, and functionalized carbon black pearls were used as conductive support. The bifunctional performance of the Fe-N-C catalyst toward ORR and HER was investigated by cyclic voltammetry, rotating ring disk electrode experiments, and electrochemical impedance spectroscopy in alkaline environment. ORR onset potential and half-wave potential were 0.95 V and 0.86 V, respectively, indicating a competitive performance in comparison with the commercial platinum-based catalyst. In addition, Fe-N-C had also a good HER activity, with an overpotential of 478 mV @10 mAcm−2 and Tafel slope of 133 mVdec−1, demonstrating its activity as bifunctional catalyst in energy conversion and storage devices, such as alkaline microbial fuel cell and microbial electrolysis cells.

The role of oxygen vacancies of ABO3 perovskite oxides in the oxygen reduction reaction

2020 ◽  
Vol 13 (5) ◽  
pp. 1408-1428 ◽  
Author(s):  
Qianqian Ji ◽  
Lei Bi ◽  
Jintao Zhang ◽  
Haijie Cao ◽  
X. S. Zhao
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Oxygen Vacancies ◽  
Reduction Reaction ◽  
Electrochemical Reactions ◽  
Abo3 Perovskite ◽  
Energy Conversion And Storage ◽  
Storage Technologies ◽  
And Storage

The oxygen reduction reaction (ORR) is one of the most important electrochemical reactions in energy conversion and storage technologies, such as fuel cells and metal–air batteries.

Design, synthesis, and energy-related applications of metal sulfides

2016 ◽  
Vol 3 (5) ◽  
pp. 402-421 ◽  
Author(s):  
Yongchang Liu ◽  
Yang Li ◽  
Hongyan Kang ◽  
Ting Jin ◽  
Lifang Jiao
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Rational Design ◽  
Reduction Reaction ◽  
Metal Sulfides ◽  
Efficient Synthesis ◽  
Design Synthesis ◽  
Nano Structures ◽  
And Storage

This review summarizes the rational design and efficient synthesis of metal sulfides with controlled morphologies, sizes, compositions, and micro/nano-structures, along with their energy-related applications in Li/Na/Mg-ion batteries, supercapacitors, oxygen reduction reaction, hydrogen evolution and storage.

A bi-functional catalyst for oxygen reduction and oxygen evolution reactions from used baby diapers: α-Fe2O3 wrapped in P and S dual doped graphitic carbon

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64258-64265 ◽  
Author(s):  
Hong Zhao ◽  
Jian Wang ◽  
Chi Chen ◽  
Dengjie Chen ◽  
Yang Gao ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Solid Waste ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Environmental Sustainability ◽  
Graphitic Carbon ◽  
Storage Devices ◽  
Energy Conversion And Storage ◽  
And Storage

The development of energy conversion and storage devices and the disposal of solid waste represent two major challenges for environmental sustainability.

Strong Metal-Support Interaction in Copper Hexacyanoferrate Nanocubes Decorated Functionalized Multiwall Carbon Nanotubes for Enhanced Bi-functional Oxygen Electrocatalytic Activity and Stability

2022 ◽  
Author(s):  
Priya Jain ◽  
Shwetambara Jha ◽  
Pravin Ingole
Keyword(s):  
Multiwall Carbon Nanotubes ◽  
Reduction Reaction ◽  
Copper Hexacyanoferrate ◽  
Storage Devices ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Energy Conversion And Storage ◽  
Metal Support ◽  
And Storage ◽  
Multiwall Carbon

Development of an efficient non-precious metal-based bi-functional oxygen electro-catalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for various electrochemical energy conversion and storage devices. Prussian...

Ultrafine Mo2C Nanoparticles Embedded in MOF Derived N and P co-doped Carbon Matrix for Efficient Electrocatalytic Oxygen Reduction Reaction in Zinc-Air Batteries

Nanoscale ◽  
2022 ◽  
Author(s):  
Lin Ye ◽  
Yiran Ying ◽  
Dengrong Sun ◽  
Jinli Qiao ◽  
Haitao Huang
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Matrix ◽  
Reduction Reaction ◽  
Electrocatalytic Oxygen Reduction ◽  
Energy Conversion And Storage ◽  
Storage Technologies ◽  
And Storage ◽  
Co Doped ◽  
Zinc Air Batteries

Exploring high-activity electrocatalysts for oxygen reduction reaction (ORR) is of great significance for a variety of renewable energy conversion and storage technologies. Here, ultrafine Mo2C nanoparticles assembled in N and...

Biomass willow catkin-derived Co3O4/N-doped hollow hierarchical porous carbon microtubes as an effective tri-functional electrocatalyst

2017 ◽  
Vol 5 (38) ◽  
pp. 20170-20179 ◽  
Author(s):  
Bin Wang ◽  
Li Xu ◽  
Gaopeng Liu ◽  
Pengfei Zhang ◽  
Wenshuai Zhu ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Porous Carbon ◽  
Electrochemical Reactions ◽  
Hierarchical Porous Carbon ◽  
Hierarchical Porous ◽  
Energy Conversion And Storage ◽  
And Storage

Oxygen reduction (ORR), oxygen evolution (OER), and hydrogen evolution (HER) reactions are extremely important electrochemical reactions for electrochemical energy conversion and storage.

scholarly journals Cobalt/nitrogen codoped carbon nanosheets derived from catkins as a high performance non-noble metal electrocatalyst for oxygen reduction reaction and hydrogen evolution reaction

RSC Advances ◽  
2020 ◽  
Vol 10 (71) ◽  
pp. 43248-43255
Author(s):  
Luting Song ◽  
Jinquan Chang ◽  
Yanhong Ma ◽  
Xinghua Tan ◽  
Yuanqing Xu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Hydrogen Evolution Reaction ◽  
High Performance ◽  
Reduction Reaction ◽  
Carbon Nanosheets ◽  
Hydrogen Evolution Reactions ◽  
Co Doped

We prepare highly efficient NPM catalysts of cobalt and nitrogen co-doped carbon nanosheets for oxygen reduction and hydrogen evolution reactions using catkin biomass.

The bifurcation point of the oxygen reduction reaction on Au–Pd nanoalloys

2016 ◽  
Vol 188 ◽  
pp. 257-278 ◽  
Author(s):  
Jakub Staszak-Jirkovský ◽  
Elisabet Ahlberg ◽  
Itai Panas ◽  
David J. Schiffrin
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Bifurcation Point ◽  
Reaction Pathway ◽  
Mechanistic Model ◽  
Direct Synthesis ◽  
Reduction Reaction ◽  
Acid Media ◽  
Energy Conversion And Storage ◽  
And Storage

The oxygen reduction reaction is of major importance in energy conversion and storage. Controlling electrocatalytic activity and its selectivity remains a challenge of modern electrochemistry. Here, first principles calculations and analysis of experimental data unravel the mechanism of this reaction on Au–Pd nanoalloys in acid media. A mechanistic model is proposed from comparison of the electrocatalysis of oxygen and hydrogen peroxide reduction on different Au–Pd ensembles. A H2O production channel on contiguous Pd sites proceeding through intermediates different from H2O2 and OOHσ adsorbate is identified as the bifurcation point for the two reaction pathway alternatives to yield either H2O or H2O2. H2O2 is a leaving group, albeit reduction of H2O2 to H2O can occur by electrocatalytic HO–OH dissociation that is affected by the presence of adsorbed OOHσ. Similarities and differences between electrochemical and direct synthesis from H2 + O2 reaction on Au–Pd nanoalloys are discussed.

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