The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.
MgO- and Pt-Promoted TiO2 as an Efficient Photocatalyst for the Preferential Reduction of Carbon Dioxide in the Presence of Water
Abstract
The photocatalytic reduction of carbon dioxide with water to fuels and chemicals is a longstanding challenge. This article focuses on the effects of cocatalysts and reaction modes on photocatalytic behaviors of TiO 2 with an emphasis on the selectivity of photogenerated electrons for CO 2 reduction in the presence of H 2 O, which has been overlooked in most of the published papers. Our results clarified that the reaction using H 2 O vapor exhibited significantly higher selectivity for CO 2 reduction than that by immersing the photocatalyst into liquid H 2 O. We examined the effect of noble metal cocatalysts and found that the rate of CH 4 formation increased in the sequence of Ag < Rh < Au < Pd < Pt, corresponding well to the increase in the efficiency of electron–hole separation. This indicates that Pt is the most effective cocatalyst to extract photogenerated electrons for CO 2 reduction. The selectivity of CH 4 in CO 2 reduction was also enhanced by Pt. The size and loading amount of Pt affected the activity; a smaller mean size of Pt particles and an appropriate loading amount favored the formation of reduction products. The reduction of H 2 O to H 2 was accelerated more than the reduction of CO 2 in the presence of Pt, leading to a lower selectivity for CO 2 reduction and limited increases in CH 4 formation rate. We demonstrated that the addition of MgO into the Pt–TiO 2 catalyst could further enhance the formation of CH 4 . The formation of H 2 was suppressed simultaneously, suggesting the increase in the selectivity for CO 2 reduction in the presence of MgO. Furthermore, the MgO- and Pt-modified TiO 2 catalyst exhibited a higher CH 4 selectivity in CO 2 reduction.
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Cites
Recent advances in catalytic hydrogenation of carbon dioxide
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Recent Advances in Heterogeneous Photocatalytic CO 2 Conversion to Solar Fuels
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Dual Cocatalysts in TiO2 Photocatalysis
Meng, A., Zhang, L., Cheng, B., & Yu, J. (2019) · Advanced Materials · doi:10.1002/adma.201807660 · Cited by 1,249
CO2 Reduction: From the Electrochemical to Photochemical Approach
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Self-citationPhotocatalytic CO 2 conversion: What can we learn from conventional CO x hydrogenation?
Kong, T., Jiang, Y., & Xiong, Y. (2020) · Chemical Society Reviews · doi:10.1039/c9cs00920e · Cited by 463
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Vu, N., Kaliaguine, S., & Do, T. (2019) · Advanced Functional Materials · doi:10.1002/adfm.201901825 · Cited by 445
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Dynamic Evolution of Atomically Dispersed Cu Species for CO2 Photoreduction to Solar Fuels
Yuan, L., Hung, S.-F., Tang, Z.-R., Chen, H. M., Xiong, Y., & Xu, Y.-J. (2019) · ACS Catalysis · doi:10.1021/acscatal.9b00862 · Cited by 316
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Impacts of the Catalyst Structures on CO2 Activation on Catalyst Surfaces
Etim, U. J., Zhang, C., & Zhong, Z. (2021) · Nanomaterials · doi:10.3390/nano11123265 · Cited by 175
“For example, 1.0 wt% MgO–Pt–TiO2 gave a superior photocatalyst performance in reducing CO2 into CH4 in the presence of H2O in comparison with Pt–TiO2 [55].”
BackgroundInfluential
Metadata
- Authors
- Xie, S., Wang, Y., Zhang, Q., Deng, W., & Wang, Y.
- Venue
- ACS Catalysis
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-09-17
- Volume
- 4
- Issue
- 10
- Pages
- 3644-3653
- ISSN
- 2155-5435 (ISSN-L)
- OpenAlex
- W2062437672
- Cited by
- 450
- References
- 4
- FWCI
- 8.08
- Type
- journal article
- Language
- en
- Open access
- closed
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