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Article

Highly Active and Carbon-Resistant Nickel Single-Atom Catalysts for Methane Dry Reforming

1
CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy Sciences, Dalian 116023, China
2
Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
3
Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Ecole Nationale Supérieure d’Ingénieurs de Poitiers (ENSIP), Université de Poitiers, UMR CNRS 7285, 1rue Marcel Doré, TSA 41105, CEDEX 9, 86073 Poitiers, France
4
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
*
Authors to whom correspondence should be addressed.
Catalysts 2020, 10(6), 630; https://doi.org/10.3390/catal10060630
Received: 5 March 2020 / Revised: 20 May 2020 / Accepted: 22 May 2020 / Published: 5 June 2020
(This article belongs to the Special Issue Catalysts for Reforming of Methane)
The conversion of CH4 and CO2 to syngas using low-cost nickel catalysts has attracted considerable interest in the clean energy and environment field. Nickel nanoparticles catalysts suffer from serious deactivation due mainly to carbon deposition. Here, we report a facile synthesis of Ni single-atom and nanoparticle catalysts dispersed on hydroxyapatite (HAP) support using the strong electrostatic adsorption (SEA) method. Ni single-atom catalysts exhibit excellent resistance to carbon deposition and high atom efficiency with the highest reaction rate of 1186.2 and 816.5 mol.gNi−1.h−1 for CO2 and CH4, respectively. Although Ni single-atom catalysts aggregate quickly to large particles, the polyvinylpyrrolidone (PVP)-assisted synthesis exhibited a significant improvement of Ni single-atom stability. Characterizations of spent catalysts revealed that carbon deposition is more favorable over nickel nanoparticles. Interestingly, it was found that, separately, CH4 decomposition on nickel nanoparticle catalysts and subsequent gasification of deposit carbon with CO2 resulted in CO generation, which indicates that carbon is reacting as an intermediate species during reaction. Accordingly, the approach used in this work for the design and control of Ni single-atom and nanoparticles-based catalysts, for dry reforming of methane (DRM), paves the way towards the development of stable noble metals-free catalysts. View Full-Text
Keywords: nickel single atom catalysts; atoms efficiency; nanoparticles; dry reforming; hydroxyapatite nickel single atom catalysts; atoms efficiency; nanoparticles; dry reforming; hydroxyapatite
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MDPI and ACS Style

Akri, M.; El Kasmi, A.; Batiot-Dupeyrat, C.; Qiao, B. Highly Active and Carbon-Resistant Nickel Single-Atom Catalysts for Methane Dry Reforming. Catalysts 2020, 10, 630. https://doi.org/10.3390/catal10060630

AMA Style

Akri M, El Kasmi A, Batiot-Dupeyrat C, Qiao B. Highly Active and Carbon-Resistant Nickel Single-Atom Catalysts for Methane Dry Reforming. Catalysts. 2020; 10(6):630. https://doi.org/10.3390/catal10060630

Chicago/Turabian Style

Akri, Mohcin, Achraf El Kasmi, Catherine Batiot-Dupeyrat, and Botao Qiao. 2020. "Highly Active and Carbon-Resistant Nickel Single-Atom Catalysts for Methane Dry Reforming" Catalysts 10, no. 6: 630. https://doi.org/10.3390/catal10060630

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