Catalytic reduction of low-concentration CO2 with water by Pt/Co@NC

doi:10.1016/j.jmst.2018.04.010

J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (12): 2337-2341.DOI: 10.1016/j.jmst.2018.04.010

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Catalytic reduction of low-concentration CO₂ with water by Pt/Co@NC

Qianqian Wang^a^b, Wenzhong Wang^b^*(), Ling Zhang^b, Yang Su^b, Kefu Wang^b, Huixia Wu^a^*()

a The Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of the Rare Earth Functional Materials, and Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors, Shanghai Normal University, Shanghai 200234, China
b State Key Laboratory of High Performance Ceramics and Super fine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received:2017-11-09 Revised:2017-12-20 Accepted:2018-01-29 Online:2018-12-20 Published:2018-11-15
Contact: Wang Wenzhong,Wu Huixia

Abstract

Abstract:

The reduction of low-concentration carbon dioxide with water to organic fuels is still a huge challenge. In this study, we successfully designed the partially oxidized cobalt nanoparticles coated by the nitrogen-doped carbon layer (Co@NC) of 2-8?nm via a facile method and then interspersed with different amount of Pt nanoparticles. The Co@NC decorated with 1?wt% Pt exhibits the best ability for CO₂ reduction to CH₄ and a CH₄ production rate of 14.4?μmol·g^-1·h^-1 is achieved. It is worth noting that the system is carried out under low-concentration CO₂ (400?ppm) circumstance without any sacrificial agent, which could be meaningful to the design of catalysts for atmospheric CO₂ reduction.

Key words: Carbon dioxide catalytic reduction, Pt/Co@NC, Low-concentration CO₂, No sacrificial agent

Qianqian Wang, Wenzhong Wang, Ling Zhang, Yang Su, Kefu Wang, Huixia Wu. Catalytic reduction of low-concentration CO₂ with water by Pt/Co@NC[J]. J. Mater. Sci. Technol., 2018, 34(12): 2337-2341.

Figures/Tables 6

Fig 1. (a) XRD patterns of different as-prepared samples; (b) Raman spectra of the samples with different Pt content.

Fig. 2. TEM images of (a, c) Co@NC and (b, d) Co@NC samples with 1?wt% Pt.

Fig. 3. Survey XPS spectrum of Co@NC with 1?wt% Pt.

Fig. 4. XPS spectra of (a) Co 2p, (b) N 1s, (c) C 1s and (d) Pt 4f from Co@NC with 1 wt% Pt.

Fig. 5. (a)Time courses of CH4 evolution on different amounts of Pt loaded Co@NC; (b) Performance comparison of 1?wt% Pt/Co@NC when the system being with CO2 and without CO2.

Fig. 6. Average yields (μmol?h-1?g-1) of CH4 in 8?h under 500?W Xe lamp with the same condition.

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Catalytic reduction of low-concentration CO₂ with water by Pt/Co@NC

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