|p-n heterojunctions of Si@WO3 mimicking thylakoid for photoelectrocatalytic CO2 reduction to C2+ products — Morphology control|
|Wan, Wenrui; Zhang, QL(张巧兰); Wei, Yan; Cao, Youzhi; Hou, Jiaxiu; Liu, Chunyan; Hong, Lin; Gao, H(高红); Chen, Jiazang; Jing, HW(景欢旺)|
|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||Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou; 730000, 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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