首页|Photothermal catalytic C-C coupling to ethylene from CO2 with high efficiency by synergistic cooperation of oxygen vacancy and half-metallic WTe2

Photothermal catalytic C-C coupling to ethylene from CO2 with high efficiency by synergistic cooperation of oxygen vacancy and half-metallic WTe2

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Photothermal catalytic CO2 conversion provides an effective solution targeting carbon neutrality by syn-ergistic utilization of photon and heat.However,the C-C coupling initiated by photothermal catalysis is still a big challenge.Herein,a three-dimensional(3D)hierarchical W18O49/WTe2 hollow nanosphere is constructed through in-situ embodying of oxygen vacancy and tellurium on the scaffold of WO3.The light absorption towards near-infrared spectral region and CO2 adsorption are enhanced by the formation of half-metal WTe2 and the unique hierarchical hollow architecture.Combining with the generation of oxy-gen vacancy with strengthened CO2 capture,the photothermal effect on the samples can be sufficiently exploited for activating the CO2 molecules.In particular,the close contact between W18O49 and WTe2 lar-gely promotes the photoinduced charge separation and mass transfer,and thus the*CHO intermediate formation and fixedness are facilitated.As a result,the C-C coupling can be evoked between tungsten and tellurium atoms on WTe2.The ethylene production by optimized W18O49/WTe2 reaches 147.6 μmol g-1 with the selectivity of 80％.The in-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)and density functional theory(DFT)calculations are performed to unveil the presence and sig-nificance of aldehyde intermediate groups in C-C coupling.The half-metallic WTe2 cocatalyst proposes a new approach for efficient CO2 conversion with solar energy,and may especially create a new platform for the generation of multi-carbon products.

Photothermal catalysisHalf-metalWTe2C-C couplingCarbon neutrality

Xiaoyue Zhang、Yong Yang、Yingjie Hu、Lijun Xiong、Tianyu Wang、Panjie Li、Jinyou Shen

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Key Laboratory of Environmental Remediation and Ecological Health,Ministry of Industry and Information Technology,School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China

Jiangsu Environmental Engineering Technology Co.Ltd,Nanjing 210019,Jiangsu,China

School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China

Nanjing Key Laboratory of Advanced Functional Materials,Nanjing Xiaozhuang University,Nanjing 210094,Jiangsu,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of China for Excellent Young ScholarsNatural Science Foundation of Jiangsu ProvinceFundamental Research Funds for the Central Universities

5130308351922050BK2019129330920021123

2024

10.1016/j.jechem.2024.02.024

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.93(6)
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