|p-n heterojunctions of Si@WO3 mimicking thylakoid for photoelectrocatalytic CO2 reduction to C2+ products — Morphology control|
|Wan, Wenrui1; Zhang, QL(张巧兰)1; Wei, Yan1; Cao, Youzhi1; Hou, Jiaxiu1; Liu, Chunyan1; Hong, Lin1; Gao, H(高红)1; Chen, Jiazang2; Jing, HW(景欢旺)1,2|
|Source Publication||Chemical Engineering Journal
|Abstract||The photoelectrocatalytic reduction of CO2 to high value-added chemicals is considered as one of the most promising technologies for solving both environmental and energy issues of the planet. Here, p-n heterojunction nanowires Si@WO3-x derived from p-silicon wafer modified by tungsten trioxide with different morphologies, including nanosheets (NS), nanobulks (NB) and nanoneedles (NN), were designed and fabricated. The Si@WO3-NS heterojunction gives the highest apparent quantum efficiency of light (0.49 % AQE) excluding the contribution of electrons from anode (>0.4 % QE of nature plant), which is nearly 25 times than that of pure Si NW (0.02 % AQE). The selectivity of multicarbon products (C2+) for Si@WO3-NS catalyst reaches 62.7 %, benefiting from the morphology simulated to the structure of thylakoid in plants. Moreover, the mechanism was proposed and confirmed by operando FT-IR experiments indicating the existence of active species COO−, HCOO−, C−O and C−C, respectively. This engineering design for Si-based material simulated plant cell can firstly produce C2+ chemicals without assistance of copper particles known as good catalyst or co-catalyst for C−C coupling. © 2022|
CO 2 reduction
|EI Accession Number||20224513072440
|EI Keywords||Sustainable chemistry
|EI Classification Number||454 Environmental Engineering
; 461.1 Biomedical Engineering
; 714.2 Semiconductor Devices and Integrated Circuits
; 802.2 Chemical Reactions
; 803 Chemical Agents and Basic Industrial Chemicals
; 804 Chemical Products Generally
; 804.2 Inorganic Compounds
; 931.2 Physical Properties of Gases, Liquids and Solids
; 951 Materials Science
|Original Document Type||Journal article (JA)
|Corresponding Author||Zhang, Qiaolan|
|Affiliation||1.State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Gansu, Lanzhou; 730000, China;|
2.State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Shanxi, Taiyuan; 030001, China
|First Author Affilication||College of Chemistry and Chemical Engineering
|Corresponding Author Affilication||College of Chemistry and Chemical Engineering
Wan, Wenrui,Zhang, Qiaolan,Wei, Yan,et al. p-n heterojunctions of Si@WO3 mimicking thylakoid for photoelectrocatalytic CO2 reduction to C2+ products — Morphology control[J].
Chemical Engineering Journal,2023,454.
Wan, Wenrui.,Zhang, Qiaolan.,Wei, Yan.,Cao, Youzhi.,Hou, Jiaxiu.,...&Jing, Huanwang.(2023).p-n heterojunctions of Si@WO3 mimicking thylakoid for photoelectrocatalytic CO2 reduction to C2+ products — Morphology control.Chemical Engineering Journal,454.
Wan, Wenrui,et al."p-n heterojunctions of Si@WO3 mimicking thylakoid for photoelectrocatalytic CO2 reduction to C2+ products — Morphology control".Chemical Engineering Journal 454(2023).
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