scholarly journals Pore-tuning to boost the electrocatalytic activity of polymeric micelle-templated mesoporous Pd nanoparticles

2019 ◽  
Vol 10 (14) ◽  
pp. 4054-4061 ◽  
Author(s):  
Cuiling Li ◽  
Muhammad Iqbal ◽  
Bo Jiang ◽  
Zhongli Wang ◽  
Jeonghun Kim ◽  
...  
Keyword(s):  
Noble Metal ◽  
Electrocatalytic Activity ◽  
High Performance ◽  
Rational Design ◽  
Pd Nanoparticles ◽  
Polymeric Micelle ◽  
Electrocatalytic Performance

Understanding how mesoporous noble metal architectures affect electrocatalytic performance is very important for the rational design and preparation of high-performance electrocatalysts.

Self-standing non-noble metal (Ni–Fe) oxide nanotube array anode catalysts with synergistic reactivity for high-performance water oxidation

2015 ◽  
Vol 3 (13) ◽  
pp. 7179-7186 ◽  
Author(s):  
Zhenlu Zhao ◽  
Haoxi Wu ◽  
Haili He ◽  
Xiaolong Xu ◽  
Yongdong Jin
Keyword(s):  
Noble Metal ◽  
Water Oxidation ◽  
High Performance ◽  
Free Standing ◽  
Simple Method ◽  
Nanotube Array ◽  
Fe Oxide ◽  
Anode Catalysts ◽  
Electrocatalytic Performance ◽  
Array Electrode

A free-standing non-noble metal Ni–Fe oxide nanotube array electrode for water oxidation, with synergistically enhanced electrocatalytic performance, has been fabricated using a simple method.

scholarly journals Engineering Ternary Copper-Cobalt Sulfide Nanosheets as High-performance Electrocatalysts toward Oxygen Evolution Reaction

Catalysts ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 459 ◽  
Author(s):  
Heng Luo ◽  
Hang Lei ◽  
Yufei Yuan ◽  
Yongyin Liang ◽  
Yi Qiu ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Noble Metal ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Active Sites ◽  
High Performance ◽  
Rational Design ◽  
Renewable Energy Sources ◽  
Cobalt Sulfide ◽  
Carbon Cloth

The rational design and development of the low-cost and effective electrocatalysts toward oxygen evolution reaction (OER) are essential in the storage and conversion of clean and renewable energy sources. Herein, a ternary copper-cobalt sulfide nanosheets electrocatalysts (denoted as CuCoS/CC) for electrochemical water oxidation has been synthesized on carbon cloth (CC) via the sulfuration of CuCo-based precursors. The obtained CuCoS/CC reveals excellent electrocatalytic performance toward OER in 1.0 M KOH. It exhibits a particularly low overpotential of 276 mV at current density of 10 mA cm−2, and a small Tafel slope (58 mV decade−1), which is superior to the current commercialized noble-metal electrocatalysts, such as IrO2. Benefiting from the synergistic effect of Cu and Co atoms and sulfidation, electrons transport and ions diffusion are significantly enhanced with the increase of active sites, thus the kinetic process of OER reaction is boosted. Our studies will serve as guidelines in the innovative design of non-noble metal electrocatalysts and their application in electrochemical water splitting

Carbon nanotube-supported dendritic Pt-on-Pd nanostructures: growth mechanism and electrocatalytic activity towards oxygen reduction reaction

2014 ◽  
Vol 2 (7) ◽  
pp. 2233-2239 ◽  
Author(s):  
Sourov Ghosh ◽  
Siniya Mondal ◽  
C. Retna Raj
Keyword(s):  
Carbon Nanotube ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Growth Mechanism ◽  
Electrocatalytic Activity ◽  
Pd Nanoparticles ◽  
Reduction Reaction ◽  
Electrocatalytic Performance

Synthesis of carbon nanotube supported dendritic Pt-on-Pd nanoparticles and their composition-dependent electrocatalytic performance towards oxygen reduction reaction are demonstrated.

scholarly journals Construction of Pd-Zn dual sites to enhance the performance for ethanol electro-oxidation reaction

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yajun Qiu ◽  
Jian Zhang ◽  
Jing Jin ◽  
Jiaqiang Sun ◽  
Haolin Tang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Performance ◽  
Rational Design ◽  
Ethanol Oxidation ◽  
Pd Nanoparticles ◽  
Direct Ethanol Fuel Cells ◽  
Practical Applications ◽  
Design And Synthesis ◽  
Carbon Coated ◽  
Electro Oxidation

AbstractRational design and synthesis of superior electrocatalysts for ethanol oxidation is crucial to practical applications of direct ethanol fuel cells. Here, we report that the construction of Pd-Zn dual sites with well exposure and uniformity can significantly improve the efficiency of ethanol electro-oxidation. Through synthetic method control, Pd-Zn dual sites on intermetallic PdZn nanoparticles, Pd-Pd sites on Pd nanoparticles and individual Pd sites are respectively obtained on the same N-doped carbon coated ZnO support. Compared with Pd-Pd sites and individual Pd sites, Pd-Zn dual sites display much higher activity for ethanol electro-oxidation, exceeding that of commercial Pd/C by a factor of ~24. Further computational studies disclose that Pd-Zn dual sites promote the adsorption of ethanol and hydroxide ion to optimize the electro-oxidation pathway with dramatically reduced energy barriers, leading to the superior activity. This work provides valuable clues for developing high-performance ethanol electro-oxidation catalysts for fuel cells.

scholarly journals Recent Advances in Isolated Single-Atom Catalysts for Zinc Air Batteries: A Focus Review

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1402 ◽  
Author(s):  
Weimin Zhang ◽  
Yuqing Liu ◽  
Lipeng Zhang ◽  
Jun Chen
Keyword(s):  
Electrocatalytic Activity ◽  
High Performance ◽  
Rational Design ◽  
High Energy ◽  
Reduction Reaction ◽  
High Energy Density ◽  
Single Atom ◽  
Design And Synthesis ◽  
Dual Metal ◽  
Zinc Air Batteries

Recently, zinc–air batteries (ZABs) have been receiving attention due to their theoretically high energy density, excellent safety, and the abundance of zinc resources. Typically, the performance of the zinc air batteries is determined by two catalytic reactions on the cathode—the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). Therefore, intensive effort has been devoted to explore high performance electrocatalysts with desired morphology, size, and composition. Among them, single-atom catalysts (SACs) have emerged as attractive and unique systems because of their high electrocatalytic activity, good durability, and 100% active atom utilization. In this review, we mainly focus on the advance application of SACs in zinc air batteries in recent years. Firstly, SACs are briefly compared with catalysts in other scales (i.e., micro- and nano-materials). A main emphasis is then focused on synthesis and electrocatalytic activity as well as the underlying mechanisms for mono- and dual-metal-based SACs in zinc air batteries catalysis. Finally, a prospect is provided that is expected to guide the rational design and synthesis of SACs for zinc air batteries.

Size and Shape Controlled Synthesis of Pd Nanocrystals

2018 ◽  
Vol 3 (10) ◽  
Author(s):  
Jiawei Zhang ◽  
Huiqi Li ◽  
Zhiyuan Jiang ◽  
Zhaoxiong Xie
Keyword(s):  
Noble Metal ◽  
Rational Design ◽  
Pd Nanoparticles ◽  
Research Progress ◽  
Synthetic Approach ◽  
Controlled Synthesis ◽  
Growth Mechanisms ◽  
Single Crystalline ◽  
Size And Shape ◽  
Wet Chemical Synthesis

Abstract Palladium (Pd) has attracted substantial academic interest due to its remarkable properties and extensive applications in many industrial processes and commercial devices. The development of Pd nanocrystals (NCs) would contribute to reduce overall precious metal loadings, and allow the efficient utilization of energy at lower economic costs. Furthermore, some of the important properties of Pd NCs can be substantially enhanced by rational designing and tight controlling of both size and shape. In this review, we have summarized the state-of-the-art research progress in the shape and size-controlled synthesis of noble-metal Pd NCs, which is based on the wet-chemical synthesis. Pd NCs have been categorized into five types: (1) single-crystalline Pd nano-polyhedra with well-defined low-index facets (e.g. {100}, {111} and {110}); (2) single-crystalline Pd nano polyhedra with well-defined high-index facets, such as Pd tetrahexahedra with {hk0} facets; (3) Pd NCs with cyclic penta-twinned structure, including icosahedra and decahedra; (4) monodisperse spherical Pd nanoparticles; (5) typical anisotropic Pd NCs, such as nanoframes, nanoplate, nanorods/wires. The synthetic approach and growth mechanisms of these types of Pd NCs are highlighted. The key factors that control the structures, including shapes (surface structures), twin structures, single-crystal nanostructures, and sizes are carefully elucidated. We also introduce the detailed characterization tools for analysis of Pd NCs with a specific type. The challenges faced and perspectives on this promising field are also briefly discussed. We believe that the detailed studies on the growth mechanisms of NCs provide a powerful guideline to the rational design and synthesis of noble-metal NCs with enhanced properties. Graphical Abstract:

Sustainable synthesis of nitrogen-doped porous carbon with improved electrocatalytic performance for hydrogen evolution

2019 ◽  
Vol 43 (7) ◽  
pp. 3078-3083 ◽  
Author(s):  
Xinxin Sang ◽  
Jianping Chen ◽  
Mingxiao Jing ◽  
Gang Shi ◽  
Caihua Ni ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Hydrogen Evolution ◽  
Porous Carbon ◽  
Electrocatalytic Activity ◽  
Rational Design ◽  
Carbonaceous Materials ◽  
Synthetic Pathway ◽  
Nitrogen Doped ◽  
Electrocatalytic Performance

The rational design of a sustainable synthetic pathway to develop carbonaceous materials with efficient electrocatalytic activity for energy conversion is a great challenge.

Rational Design of a High Performance and Robust Solar Evaporator via 3D‐Printing Technology

2021 ◽  
pp. 2102649
Author(s):  
Sourav Chaule ◽  
Jongha Hwang ◽  
Seong‐Ji Ha ◽  
Jihun Kang ◽  
Jong‐Chul Yoon ◽  
...  
Keyword(s):  
3D Printing ◽  
High Performance ◽  
Rational Design ◽  
Printing Technology ◽  
3D Printing Technology

scholarly journals Carbon nanomaterial hybrids via laser writing for high-performance non-enzymatic electrochemical sensors: a critical review

2021 ◽  
Author(s):  
Marcel Simsek ◽  
Nongnoot Wongkaew
Keyword(s):  
Noble Metal ◽  
Critical Review ◽  
High Performance ◽  
Carbon Nanomaterials ◽  
Electrochemical Sensors ◽  
Low Cost ◽  
Three Dimensional ◽  
Laser Writing ◽  
Enzyme Mimicking ◽  
Natural Enzyme

AbstractNon-enzymatic electrochemical sensors possess superior stability and affordability in comparison to natural enzyme-based counterparts. A large variety of nanomaterials have been introduced as enzyme mimicking with appreciable sensitivity and detection limit for various analytes of which glucose and H2O2 have been mostly investigated. The nanomaterials made from noble metal, non-noble metal, and metal composites, as well as carbon and their derivatives in various architectures, have been extensively proposed over the past years. Three-dimensional (3D) transducers especially realized from the hybrids of carbon nanomaterials either with metal-based nanocatalysts or heteroatom dopants are favorable owing to low cost, good electrical conductivity, and stability. In this critical review, we evaluate the current strategies to create such nanomaterials to serve as non-enzymatic transducers. Laser writing has emerged as a powerful tool for the next generation of devices owing to their low cost and resultant remarkable performance that are highly attractive to non-enzymatic transducers. So far, only few works have been reported, but in the coming years, more and more research on this topic is foreseeable. Graphical abstract

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