Preparation, characterization, and catalytic performance of high efficient CeO 2 -MnO x -Al 2 O 3 catalysts for NO elimination

Catalytic combustion of volatile organic compounds (VOCs) is a high efficient and low-polluted technique. In this paper, the palladium-based combustion catalysts on cordierite honeycomb ceramics (CHC) substrate without interlayer film — Pd/CHC, were prepared by electroless plating method, and the effect of preparing conditions for the catalysts on the catalytic performance of toluene combustion was mainly studied. The optimal conditions were confirmed as follows: plating bath temperature is 60°C, plating time is 30min, palladium salt concentrationis 0.2g/L, and calcination temperature after plating is 500°C. Finally, the stability test further indicated that the Pd/CHC catalyst prepared by the optimal electroless plating conditions has good catalytic stability.

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Hybrid zeolitic imidazolate framework-derived ZnO/ZnMoO4 heterostructure for electrochemical hydrogen production

Dalton Transactions ◽

10.1039/d1dt01861b ◽

2021 ◽

Author(s):

Yang Li ◽

Shumei Chen ◽

Xin Wu ◽

Huabin Zhang ◽

Jian Zhang

Keyword(s):

Hydrogen Production ◽

Water Splitting ◽

Low Cost ◽

Catalytic Performance ◽

Hydrogen Fuel ◽

Interface Engineering ◽

Zeolitic Imidazolate Framework ◽

System P ◽

High Efficient ◽

Electrochemical Water Splitting

Sustainable hydrogen fuel supply through electrochemical water splitting requires high-efficient, low-cost and robust electrocatalysts. Interface engineering is of key importance to improve the catalytic performance in the heterogeneous electrocatalysis system....

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Uniform Distribution of Pd on GO-C Catalysts for Enhancing the Performance of Air Cathode Microbial Fuel Cell

Catalysts ◽

10.3390/catal11080888 ◽

2021 ◽

Vol 11 (8) ◽

pp. 888

Author(s):

Jingzhen Wang ◽

Kaijie Mu ◽

Xuedong Zhao ◽

Dianliang Luo ◽

Xiaodi Yu ◽

...

Keyword(s):

Fuel Cell ◽

Microbial Fuel Cell ◽

High Performance ◽

Catalytic Performance ◽

Metal Catalyst ◽

Carbon Paper ◽

Air Cathode ◽

Current Output ◽

High Efficient ◽

Nanocomposite Catalysts

Metal, as a high-performance electrode catalyst, is a research hotspot in the construction of a high-performance microbial fuel cell (MFC). However, metal catalyst nanoparticles and their dispersed carriers are prone to aggregation, producing catalytic electrodes with inferior qualities. In this study, Pd is uniformly dispersed on the graphene framework supported by carbon black to form nanocomposite catalysts (Pd/GO-C catalysts). The effect of the palladium loading amount in the catalyst on the catalytic performance of the air cathode was further studied. The optimized metal loading afforded a reduced resistance and improved accessibility of Pd particles for the ORR. The maximum current output of the 0.250 Pd (mg/cm2) MFC was 1645 mA/m2, which is 4.2-fold higher than that of the carbon paper cathode. Overall, our findings provide a novel protocol for the preparation of high-efficient ORR catalyst for MFCs.

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Bismuth-Based Free-Standing Electrodes for Ambient-Condition Ammonia Production in Neutral Media

Nano-Micro Letters ◽

10.1007/s40820-020-00444-y ◽

2020 ◽

Vol 12 (1) ◽

Cited By ~ 4

Author(s):

Ying Sun ◽

Zizhao Deng ◽

Xi-Ming Song ◽

Hui Li ◽

Zihang Huang ◽

...

Keyword(s):

Low Cost ◽

Catalytic Performance ◽

Reduction Reaction ◽

Ambient Conditions ◽

Free Standing ◽

Hydrogen Electrode ◽

Faradaic Efficiency ◽

Long Term Stability ◽

High Efficient ◽

Neutral Media

AbstractElectrocatalytic nitrogen reduction reaction is a carbon-free and energy-saving strategy for efficient synthesis of ammonia under ambient conditions. Here, we report the synthesis of nanosized Bi2O3 particles grown on functionalized exfoliated graphene (Bi2O3/FEG) via a facile electrochemical deposition method. The obtained free-standing Bi2O3/FEG achieves a high Faradaic efficiency of 11.2% and a large NH3 yield of 4.21 ± 0.14 $$ \upmu{\text{g}}_{{{\text{NH}}_{3} }} $$ μ g NH 3 h−1 cm−2 at − 0.5 V versus reversible hydrogen electrode in 0.1 M Na2SO4, better than that in the strong acidic and basic media. Benefiting from its strong interaction of Bi 6p band with the N 2p orbitals, binder-free characteristic, and facile electron transfer, Bi2O3/FEG achieves superior catalytic performance and excellent long-term stability as compared with most of the previous reported catalysts. This study is significant to design low-cost, high-efficient Bi-based electrocatalysts for electrochemical ammonia synthesis.

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Fabrication and Water Treatment Application of High Efficient PbO2 Electrode

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.727.821 ◽

2017 ◽

Vol 727 ◽

pp. 821-829 ◽

Cited By ~ 2

Author(s):

Yi Nan Li ◽

Xin Yu Zhuang ◽

Hong Yu Li ◽

Li Mei Ai ◽

Yi Hu Wang ◽

...

Keyword(s):

Surface Coating ◽

Earth Element ◽

Lattice Structure ◽

Catalytic Performance ◽

Material Surface ◽

Catalytic Layer ◽

The Novel ◽

Life Test ◽

High Efficient ◽

Treatment Application

A novel and high efficient PbO2 electrode has been fabricated in the present study for refractory wastewater treatment. The traditional Ti plate is made into honeycomb by electronic corrosion to be used as electrode basement. The novel surface topography improves the specific surface area of the electrode material and enhances the adhesion of surface coating. SnO2-Sb layer is deposited between basement and PbO2 layer which reduces the thermal stress and improve electrode life. Rare earth element La is doping into PbO2 layer to improve the lattice structure and the catalytic performance. Finally, F ion is adding into the catalytic layer to improve the smoothness of the material surface. Characterized by SEM and XRD, results showed that the electrode prepared has novel surface morphology. Pollutants degradation results and electrode life test showed that the PbO2 electrode investigated in the present study has great advantage compared with traditional electrodes and has good application prospect.

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Efficient Production of Methyl Oleate Using a Biomass-Based Solid Polymeric Catalyst with High Acid Density

Advances in Polymer Technology ◽

10.1155/2019/4041631 ◽

2019 ◽

Vol 2019 ◽

pp. 1-11 ◽

Cited By ~ 1

Author(s):

Anping Wang ◽

Heng Zhang ◽

Hu Li ◽

Song Yang

Keyword(s):

Catalytic Activity ◽

Oleic Acid ◽

Methyl Oleate ◽

Low Cost ◽

Catalytic Performance ◽

Raw Material ◽

Efficient Production ◽

High Acid ◽

High Efficient ◽

Good Catalytic Activity

Biomass-based polymers are eco-friendly, nontoxic and biodegradable materials. In this work, in order to prepare green, low-cost and high-efficient catalysts under mild conditions, we chose biomass-based chitosan as raw material and prepared a new solid acidic catalyst by an acid functionalization method. FT-IR, XRD, SEM, TGA, BET, neutralization titration and other analytical methods were used to characterize the catalyst. The results showed that CS-SO3H morphology exhibited a sphere of about 10 μm diameter, and the acid density was as high as 3.81 mmol/g. The catalyst exhibits good catalytic activity in the esterification of oleic acid and methanol, which is a model reaction of the pre-esterification process in the preparation of biodiesel from feedstocks with high acid values. Under the optimum reaction conditions (15/1 methanol/oleic acid mole ratio and 3 wt% catalyst dosage at 75°C for 3 h), the yield of methyl oleate can reach 95.7%. Even if the mass of oleic acid in the reactant increased to 20 g, solid acid showed good catalytic performance, and the yield of methyl oleate was 94.4%. After four times of reuse, the yield of the catalyst can still reach 85.7%, which indicates that the catalyst has good catalytic activity and stability, and has potential application prospects.

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High-Efficiency of Bi-Functional-Based Perovskite Nanocomposite for Oxygen Evolution and Oxygen Reduction Reaction: An Overview

Materials ◽

10.3390/ma14112976 ◽

2021 ◽

Vol 14 (11) ◽

pp. 2976

Author(s):

Tse-Wei Chen ◽

Palraj Kalimuthu ◽

Ganesan Anushya ◽

Shen-Ming Chen ◽

Rasu Ramachandran ◽

...

Keyword(s):

Oxygen Reduction ◽

Oxygen Evolution ◽

High Efficiency ◽

Low Cost ◽

Catalytic Performance ◽

Rechargeable Batteries ◽

General Mechanism ◽

Storage Device ◽

Morphological Studies ◽

High Efficient

High efficient, low-cost and environmentally friendly-natured bi-functional-based perovskite electrode catalysts (BFPEC) are receiving increasing attention for oxygen reduction/oxygen evolution reaction (ORR/OER), playing an important role in the electrochemical energy conversion process using fuel cells and rechargeable batteries. Herein, we highlighted the different kinds of synthesis routes, morphological studies and electrode catalysts with A-site and B-site substitution co-substitution, generating oxygen vacancies studies for boosting ORR and OER activities. However, perovskite is a novel type of oxide family, which shows the state-of-art electrocatalytic performances in energy storage device applications. In this review article, we go through different types of BFPECs that have received massive appreciation and various strategies to promote their electrocatalytic activities (ORR/OER). Based on these various properties and their applications of BFPEC for ORR/OER, the general mechanism, catalytic performance and future outlook of these electrode catalysts have also been discussed.

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High-Efficient and Recyclable Magnetic Separable Catalyst for Catalytic Hydrogenolysis of β-O-4 Linkage in Lignin

Polymers ◽

10.3390/polym10101077 ◽

2018 ◽

Vol 10 (10) ◽

pp. 1077 ◽

Cited By ~ 4

Author(s):

Jingtao Huang ◽

Chengke Zhao ◽

Fachuang Lu

Keyword(s):

Catalytic Performance ◽

High Yield ◽

Chemical Bonds ◽

Aryl Ether ◽

Structural Units ◽

Great Abundance ◽

High Efficient ◽

Catalytic Hydrogenolysis ◽

Potential Applications ◽

Lignin Depolymerization

Lignin is recognized as a good sustainable material because of its great abundance and potential applications. At present, lignin hydrogenolysis is considered as a potential but challenging way to produce low-molecular-mass aromatic chemicals. The most common linkage between the structural units of lignin polymer is the β-O-4 aryl ether, which are primary or even only target chemical bonds for many degradation processes. Herein, a Pd-Fe3O4 composite was synthesized for catalytic hydrogenolysis of β-O-4 bond in lignin. The synthesized catalyst was characterized by XRD, XPS, and SEM and the lignin depolymerization products were analyzed by GC-MS. The catalyst showed good catalytic performance during the hydrogenolysis process, lignin dimer was degraded into monomers completely and a high yield of monomers was obtained by the hydrogenolysis of bagasse lignin. More importantly, the magnetic catalyst was separated conveniently by magnet after reaction and remained highly catalytically efficient after being reused for five times. This work has demonstrated an efficient & recyclable catalyst for the cleavage of the β-O-4 bond in lignin providing an alternative way to make better use of lignins.

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