Anaclet Nsabimana

University of Rwanda

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Yufan Zhang

Nankai University

Guobao Xu

Chinese Academy of Sciences

Xiangjie Bo

Northeast Normal University

Ningzhao Shang

Hebei Agricultural University

Shimeles Addisu Kitte

Jimma University

Ce Han

Chinese Academy of Sciences

Liping Guo

Shandong Academy of Sciences

Shigang Shen

Hebei University

Jianping Lai

Qingdao University of Science and Technology

Shuo Liu

Dalian Polytechnic University

Cooperative Institutions

Chinese Academy of Sciences

Changchun Institute of Applied Chemistry

University of Chinese Academy of Sciences

Hebei University

University of Science and Technology of China

Northeast Normal University

Université Paris Cité

Centre National de la Recherche Scientifique

Peking University

Interfaces Traitements Organisation et Dynamique des Systèmes

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Designing Carbon Nanotube-Wrapped Cofe2o4 3d Cross-Frame for Monitoring the Environmental Pollutant Nitrobenzene

Shuo Liu Yufan Zhang Ningzhao Shang Anaclet Nsabimana Shigang Shen

In this study, we employ a catalytic system derived from a zeolitic imidazolate framework (ZIF), comprising carbon nanotube-wrapped CoFe2O4 with a modified 3D cross morphology. The seamless transition between ionic valence states in CoFe2O4 contributes to enhanced material conductivity, illustrating a significant synergistic coupling effect. The 3D matrix has the capacity to generate a greater number of active sites and exhibit a high surface area. The generation of nanotubes provides additional channels for electron transport, thereby improving the charge transfer efficiency and enhancing the electrochemical sensing capability of the system. The synthesized material demonstrates outstanding electrochemical sensing capabilities for nitrobenzene, exhibiting impressive sensitivity with a remarkably low limit of detection at 0.013 μM and a broad linear response range (0.06–414.9 μM), heightened sensitivity, excellent repeatability, and superior selectivity. Furthermore, the quantification of trace nitrobenzene in water samples demonstrates a recovery rate within the range of 96.0% to 102.8%. Consequently, this material presents itself as a promising catalyst for electrochemical analysis and introduces a novel approach for detecting low concentrations of nitrobenzene.

Nitrobenzene

10.2139/ssrn.4813248

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Design of Metal-free Nanocatalysts

The Royal Society of Chemistry eBooks (2019)

Anaclet Nsabimana Guobao Xu

Nanomaterials exhibit unique properties that are different from their bulk counterparts as decreasing the size of a particle leads to a larger portion of the atoms being located on the surface, resulting in the increased influence of surface effects on the properties of a material. Owing to these properties, nanocatalysts are considered to be a bridge between homogeneous and heterogeneous catalysis. Metal nanocatalysts, especially platinum catalysts, are important in electrochemical and organic transformation reactions. Unfortunately, their scarcity, low stability, risk to the environment and high cost limit their use. To overcome these challenges, significant work has been performed to synthesize metal-free nanocatalysts such as fullerene, graphitic carbon nitride, porous carbons, graphene, carbon fibres, carbon nanotubes, pure and doped carbons with non-metallic elements (B, N, H, O, P, S…), and so forth, as an alternative to metal-based catalysts. This chapter describes the progress in this field, with a focus on catalyst characterization and their performance, both in electrocatalysis and in organic transformations.

Nanomaterial-based catalyst

Nanomaterials

Carbon fibers

10.1039/9781788016292-00163

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Cofe-Ldhs Were Grown on Co-Layered Hydroxides to Achieve 3d-Hierarchical Flower Like Architecture for Efficient Oxygen Evolution Reaction

Shuo Liu Yufan Zhang Ningzhao Shang Anaclet Nsabimana Huan Wang

Layered double hydroxides

Oxygen evolution

10.2139/ssrn.4892406

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Preparation of Pt anchored on cerium oxide and ordered mesoporous carbon tri-component composite for electrocatalytic oxidation of adrenaline

Materials Science and Engineering C (2020)

Tianjiao Meng Anaclet Nsabimana Tao Zeng Huixian Jia Siying An

Cerium oxide

Carbon fibers

Linear range

10.1016/j.msec.2020.110747

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Citations (22)

Cobalt and nitrogen co-embedded onion-like mesoporous carbon vesicles as efficient catalysts for oxygen reduction reaction

Journal of Materials Chemistry A (2014)

Mian Li Xiangjie Bo Yufan Zhang Ce Han Anaclet Nsabimana

A series of cobalt and nitrogen co-embedded onion-like mesoporous carbon vesicles (Co–NMCVs) were synthesized as non-noble metal catalysts for the first time. Physical characterization indicated that the Co–NMCVs samples all retain the lamellar porous shell structure (accompanying considerable surface areas and pore volumes), except the Co20–NMCV sample. Electrochemical measurements demonstrate that most of the Co–NMCV catalysts exhibit remarkable oxygen reduction reaction (ORR) activity in both acidic and alkaline media. Particularly, the Co10–NMCV catalyst exhibits a more positive onset voltage of −0.13 V (only 50 mV deviation from Pt/C), a higher half-wave potential of −0.18 V (only 20 mV deviation from Pt/C), and better selectivity (electron-transfer number >3.92) for the ORR in alkaline medium. Meanwhile, the Co10–NMCV catalyst also shows higher durability of the ORR catalytic activity and better methanol tolerance than the commercial Pt/C catalyst. The unprecedented performance of the Co10–NMCV catalyst in ORR is attributed to the homogeneous distribution of abundant Co–N active sites (having the dominant effect for the ORR catalytic activity) on the surface of the MCV matrix (which has the onion-like lamellar structure, high specific surface area, and large pore volume), which observably enhance the active site density of the Co10–NMCV catalyst. All experimental results demonstrate that the Co10–NMCV catalyst may be exploited as the potentially efficient and inexpensive non-noble metal ORR catalyst to replace Pt-based catalysts.

Specific surface area

Noble metal

Carbon fibers

10.1039/c4ta01078g

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Citations (116)

Sensitive electrochemical detection of sodium azide based on the electrocatalytic activity of the pasting liquid of a carbon paste electrode

Analytical and Bioanalytical Chemistry (2018)

Kaixuan Li Moyan Han Fengxia Wu Anaclet Nsabimana Wei Zhang

Pyrolytic carbon

Sodium azide

Carbon paste electrode

Carbon fibers

10.1007/s00216-018-1144-1

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Citations (3)

Enhanced Oxygen Evolution Reaction Performance of Cr-Cofe-Layered Double Hydroxide Via the Synergistic Roles of Fe Etching, Cr Doping, and Anion Intercalation

Shuo Liu Yufan Zhang Ningzhao Shang Anaclet Nsabimana Shigang Shen

Oxygen evolution

10.2139/ssrn.5095918

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An enzyme-free electrochemical biosensor based on target-catalytic hairpin assembly and Pd@UiO-66 for the ultrasensitive detection of microRNA-21

Analytica Chimica Acta (2020)

Tianjiao Meng Ningzhao Shang Anaclet Nsabimana Huimin Ye Huan Wang

10.1016/j.aca.2020.09.022

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Citations (51)

Designing ternary Co-Ni-Fe layered double hydroxides within a novel 3D cross-flower framework for efficient catalytic performance in oxygen evolution reaction

Journal of Colloid and Interface Science (2024)

Shuo Liu Yufan Zhang Lin Hao Anaclet Nsabimana Shigang Shen

Layered double hydroxides

Oxygen evolution

10.1016/j.jcis.2024.09.185

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Citations (11)

Simple Synthesis of Peanut Shell-Like Mocofe-Ho@Como-Ldh for Efficient Alkaline Oxygen Evolution Reaction

Enwei Guo Ningzhao Shang Youhua Huo Anaclet Nsabimana Huan Wang

Due to the depletion of fossil energy on earth, it is crucial to develop resource rich and efficient non-precious metal electrocatalysts for oxygen evolution reaction (OER). Herein, we synthesized an efficient and economical electrocatalyst using a simple self-assembly strategy. Firstly, rod-shaped MIL-88A was synthesized by hydrothermal method. Then, the surface of MIL-88A was functionalized and encapsulated in zeolitic imidazolate framework-67 (ZIF-67) by hydrothermal method. The combination of MIL-88A and ZIF-67 resulted in a slight ion-exchange reaction between Co2+ and the surface of MIL-88A to generate CoFe-LDH@ZIF-67 core-shell structure. Afterwards, in the presence of Mo6+, ZIF-67 was converted into CoMo-nanocages through ion-exchange reactions, forming a core-shell structure of MoCoFe hydr (oxy) oxide@CoMo-LDH (MoCoFe-HO@CoMo-LDH). Due to the advantages of core-shell structure and composition, this material exhibits excellent OER characteristics, with a small Tafel slope (45.11 mV dec-1) and low overpotential (324 mV) at 10 mA cm-2. It exhibits good stability in alkaline media. This research work provides a novel approach for the development of efficient and economical non-precious metal electrocatalysts.

Oxygen evolution

10.2139/ssrn.4711586

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