Synthesis of Co 0.5 Mn 0.1 Ni 0.4 C 2 O 4 ⋅ n  H 2 O Micropolyhedrons: Multimetal Synergy for High‐Performance Glucose Oxidation Catalysis

2019 ◽  
Vol 14 (13) ◽  
pp. 2259-2265 ◽  
Author(s):  
Nan Li ◽  
Qing Li ◽  
Meijuan Yuan ◽  
Xiaotian Guo ◽  
Shasha Zheng ◽  
...  
Keyword(s):  
High Performance ◽  
Glucose Oxidation ◽  
Oxidation Catalysis

scholarly journals Corrigendum: Synthesis of Co 0.5 Mn 0.1 Ni 0.4 C 2 O 4 ⋅nH 2 O Micropolyhedrons: Multimetal Synergy for High‐Performance Glucose Oxidation Catalysis

2020 ◽  
Vol 15 (13) ◽  
pp. 2036-2036
Author(s):  
Nan Li ◽  
Qing Li ◽  
Meijuan Yuan ◽  
Xiaotian Guo ◽  
Shasha Zheng ◽  
...  
Keyword(s):  
High Performance ◽  
Glucose Oxidation ◽  
Oxidation Catalysis

scholarly journals N, S and Transition-Metal Co-Doped Graphene Nanocomposites as High-Performance Catalyst for Glucose Oxidation in a Direct Glucose Alkaline Fuel Cell

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 202
Author(s):  
Yexin Dai ◽  
Jie Ding ◽  
Jingyu Li ◽  
Yang Li ◽  
Yanping Zong ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Active Sites ◽  
High Performance ◽  
Glucose Oxidation ◽  
Alkaline Fuel Cell ◽  
Blank Group ◽  
Graphene Nanocomposites ◽  
Doped Graphene ◽  
One Step ◽  
Hydrothermal Approach

In this work, reduced graphene oxide (rGO) nanocomposites doped with nitrogen (N), sulfur (S) and transitional metal (Ni, Co, Fe) were synthesized by using a simple one-step in-situ hydrothermal approach. Electrochemical characterization showed that rGO-NS-Ni was the most prominent catalyst for glucose oxidation. The current density of the direct glucose alkaline fuel cell (DGAFC) with rGO-NS-Ni as the anode catalyst reached 148.0 mA/cm2, which was 40.82% higher than the blank group. The DGAFC exhibited a maximum power density of 48 W/m2, which was more than 2.08 folds than that of blank group. The catalyst was further characterized by SEM, XPS and Raman. It was speculated that the boosted performance was due to the synergistic effect of N, S-doped rGO and the metallic redox couples, (Ni2+/Ni3+, Co2+/Co3+ and Fe2+/Fe3+), which created more active sites and accelerated electron transfer. This research can provide insights for the development of environmental benign catalysts and promote the application of the DGAFCs.

scholarly journals Mechanism of selective benzene hydroxylation catalyzed by iron-containing zeolites

2018 ◽  
Vol 115 (48) ◽  
pp. 12124-12129 ◽  
Author(s):  
Benjamin E. R. Snyder ◽  
Max L. Bols ◽  
Hannah M. Rhoda ◽  
Pieter Vanelderen ◽  
Lars H. Böttger ◽  
...  
Keyword(s):  
High Activity ◽  
Active Site ◽  
Active Sites ◽  
High Performance ◽  
Density Functional ◽  
Catalyst Deactivation ◽  
Density Functional Theory Calculations ◽  
Oxidation Catalysis ◽  
Spectroscopic Techniques ◽  
Benzene Hydroxylation

A direct, catalytic conversion of benzene to phenol would have wide-reaching economic impacts. Fe zeolites exhibit a remarkable combination of high activity and selectivity in this conversion, leading to their past implementation at the pilot plant level. There were, however, issues related to catalyst deactivation for this process. Mechanistic insight could resolve these issues, and also provide a blueprint for achieving high performance in selective oxidation catalysis. Recently, we demonstrated that the active site of selective hydrocarbon oxidation in Fe zeolites, named α-O, is an unusually reactive Fe(IV)=O species. Here, we apply advanced spectroscopic techniques to determine that the reaction of this Fe(IV)=O intermediate with benzene in fact regenerates the reduced Fe(II) active site, enabling catalytic turnover. At the same time, a small fraction of Fe(III)-phenolate poisoned active sites form, defining a mechanism for catalyst deactivation. Density-functional theory calculations provide further insight into the experimentally defined mechanism. The extreme reactivity of α-O significantly tunes down (eliminates) the rate-limiting barrier for aromatic hydroxylation, leading to a diffusion-limited reaction coordinate. This favors hydroxylation of the rapidly diffusing benzene substrate over the slowly diffusing (but more reactive) oxygenated product, thereby enhancing selectivity. This defines a mechanism to simultaneously attain high activity (conversion) and selectivity, enabling the efficient oxidative upgrading of inert hydrocarbon substrates.

Nanoporous bismuth electrocatalyst with high performance for glucose oxidation application

2021 ◽  
Vol 46 (5) ◽  
pp. 4055-4064
Author(s):  
Hongqi Shi ◽  
CongCong Tang ◽  
Zuchun Wang ◽  
Zejie Zhang ◽  
Wenjuan Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Glucose Oxidation

scholarly journals Towards Experimental Handbooks in Catalysis

2020 ◽  
Vol 63 (19-20) ◽  
pp. 1683-1699
Author(s):  
Annette Trunschke ◽  
Giulia Bellini ◽  
Maxime Boniface ◽  
Spencer J. Carey ◽  
Jinhu Dong ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
High Performance ◽  
Best Practice ◽  
Data Science ◽  
Theoretical Description ◽  
Scientific Data ◽  
Oxidation Catalysis ◽  
Mixed Metal Oxide ◽  
Data Generation ◽  
Mixed Metal Oxide Catalysts

AbstractThe “Seven Pillars” of oxidation catalysis proposed by Robert K. Grasselli represent an early example of phenomenological descriptors in the field of heterogeneous catalysis. Major advances in the theoretical description of catalytic reactions have been achieved in recent years and new catalysts are predicted today by using computational methods. To tackle the immense complexity of high-performance systems in reactions where selectivity is a major issue, analysis of scientific data by artificial intelligence and data science provides new opportunities for achieving improved understanding. Modern data analytics require data of highest quality and sufficient diversity. Existing data, however, frequently do not comply with these constraints. Therefore, new concepts of data generation and management are needed. Herein we present a basic approach in defining best practice procedures of measuring consistent data sets in heterogeneous catalysis using “handbooks”. Selective oxidation of short-chain alkanes over mixed metal oxide catalysts was selected as an example.

Ultrathin nanosheet-assembled [Ni3(OH)2(PTA)2(H2O)4]·2H2O hierarchical flowers for high-performance electrocatalysis of glucose oxidation reactions

Nanoscale ◽  
2018 ◽  
Vol 10 (27) ◽  
pp. 13270-13276 ◽  
Author(s):  
Shasha Zheng ◽  
Bing Li ◽  
Yijian Tang ◽  
Qing Li ◽  
Huaiguo Xue ◽  
...  
Keyword(s):  
High Performance ◽  
Glucose Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Reactions ◽  
Metal Organic ◽  
Ultrathin Nanosheet ◽  
Organic Framework

Ultrathin nanosheet-assembled metal–organic framework hierarchical flowers have been regarded as very promising electrocatalysts for glucose oxidation reactions.

scholarly journals Defect-rich TiO2 in situ evolved from MXene for efficiently oxidative dehydrogenation of ethane

2020 ◽  
Author(s):  
Yanliang Zhou ◽  
Xiaoyu Li ◽  
Yicong Chai ◽  
Zihao Wu ◽  
Jian Lin ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Oxidative Dehydrogenation ◽  
High Performance ◽  
Activation Barrier ◽  
Theoretical Calculations ◽  
Oxidation Catalysis ◽  
Defect Engineering ◽  
Efficient Catalyst ◽  
Vacancy Defects

Abstract It remains a challenge to make metal oxides with limited reducibility as active component rather than support or modifier for the oxidative dehydrogenation (ODH) of light alkanes. Here, we report a special TiO2 (M-TiO2) evolved from Ti3C2Tx MXene material to be a new kind of efficient catalyst in the ODH of ethane. The reactivity on this M-TiO2 is four times higher than that on P25 TiO2, endowing an excellent ethylene productivity of 15.4 gC2H4 gcat-1 h-1 that outperforms the previously reported catalysts. Experimental characterizations and theoretical calculations reveal the existence of both Ti and oxygen vacancy defects on M-TiO2. The Ti defect can increase the reducibility of M-TiO2 to reduce the activation barrier of ethane while the oxygen vacancy facilitates the adsorption of O2 to recover lattice oxygen, accounting for the high performance. This work enlightens the defect engineering of traditional metal oxide as a promising catalyst in the oxidation catalysis.

Facile one-step synthesis of supportless porous AuPtPd nanocrystals as high performance electrocatalyst for glucose oxidation reaction

2020 ◽  
Vol 45 (38) ◽  
pp. 19163-19173
Author(s):  
Yahia H. Ahmad ◽  
Assem T. Mohamed ◽  
Ahmed El-Shafei ◽  
Siham Y. Al-Qaradawi ◽  
Amina S. Aljaber
Keyword(s):  
Oxidation Reaction ◽  
High Performance ◽  
Glucose Oxidation ◽  
One Step ◽  
Glucose Oxidation Reaction
Sign in / Sign up

Export Citation Format

Share Document