Plasma-induced defect engineering: Boosted the reverse water gas shift reaction performance with electron trap

Yang, Jinman; Zhu, Xingwang; Yu, Qing; Zhou, Guli; Li, Qidi; Wang, Chongtai; Ye, Hua; She, Yuanbin; Xu, Hui; Li, Huaming

doi:10.1016/j.jcis.2020.07.032

Cited by 34 publications

(9 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To reveal the reaction mechanism for the significantly enhanced photocatalytic CO 2 conversion during the reaction, a series of spectroscopic characterizations were tested such as photoluminescence (PL) spectrum, electrochemical impedance spectroscopy (EIS), and ultraviolet–visible (UV–vis) diffuse reflectance spectroscopy (DRS). In Figure a, PL emission is used to detect the recombination rate of electrons and holes, and the results show outstanding charge separation efficiency of Co 2 P/BPs. − As for the EIS test result shown in Figure b, which could reveal the migration of photogenerated carriers, the radius of the Nyquist plot of Co 2 P/BPs is smaller than that of BPs-H, suggesting a higher transfer rate and that Co 2 P does extract electrons and accelerate electron migration. , The time-dependent photocurrent response also illustrates the outstanding photoconversion efficiency of Co 2 P/BPs, as depicted in Figure c. From Figure d, it can be clearly seen that both the samples show almost the same shape, and response curves are approximately a straight line with very broad light absorption capacity without large differences from 200 to 800 nm, consistent with the color of the material itself (brown for BPs and gray for Co 2 P/BPs).…”

Section: Resultsmentioning

confidence: 93%

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Zhu

Zhou

et al. 2021

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Photocatalytic CO 2 reduction is a means of alleviating energy crisis and environmental deterioration. In this work, a rising two-dimensional (2D) material rarely reported in the field of photocatalytic CO 2 reduction, black phosphorus (BP) nanosheets, is synthesized, on which Co 2 P is in situ grown by solvothermal treatment using BP itself as a P source. Co 2 P on the BP nanosheets (BPs) surface can prevent the destruction of BPs in ambient air and, in the meantime, favor charge separation and CO 2 adsorption and activation during the catalytic process. Upon light irradiation, Co 2 P can extract the photogenerated electrons effectively across the intimate interface and lower the CO 2 activation energy barrier, supported by both experimental characterizations and theoretical calculations. Benefitting from integrated advantages of BPs and Co 2 P, the optimal Co 2 P/BPs exhibit photocatalytic reduction of CO 2 to CO at a rate of 25.5 μmol g −1 h −1 with a selectivity of 91.4%, both of which are higher than those of pristine BPs. This work presents ideas for stabilizing BPs and improving their CO 2 reduction performance simultaneously.

show abstract

Section: Resultsmentioning

confidence: 93%

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Zhu

Zhou

et al. 2021

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…Such morphology change can be attributed to the high‐energy and high‐active plasma, and the etching effect of energetic radicals attacking the surface of Ag (Figure S2, Supporting Information). [ 39 ] In addition, during the vulcanization process, the Ag foil reacted with the S 2− to form Ag 2 S and the stress generated will also modify the surface morphology. [ 40 ] Following the process of reduction, the crystal grows along the direction of the hump and curl in different directions to form plentiful nanowire clusters.…”

Section: Resultsmentioning

confidence: 99%

In Situ Growth and Activation of Ag/Ag₂S Nanowire Clusters by H₂S Plasma Treatment for Promoted Electrocatalytic CO₂ Reduction

Yang

et al. 2021

Advanced Sustainable Systems

Self Cite

View full text Add to dashboard Cite

Nonmetallic activation of metal electrodes is effective and universal to improve the catalytic activity for the CO2 reduction reaction. Here, selective electrocatalytic reduction of CO2 is performed on a plasma‐activated Ag/Ag2S catalyst for the first time. By a facile H2S plasma treatment on Ag foil and subsequent electrochemical prereduction, Ag/Ag2S nanowire clusters are obtained in situ with different sizes. High Faradaic efficiency for CO generation on Ag/Ag2S is shifted to a significantly lower overpotential compared with untreated Ag foil with high current density. Density functional theory studies reveal that the promoted catalytic activity can be ascribed to the enhanced CO2 activation and reduced reaction energy barrier of the limiting step.

show abstract

“…As shown in Figure 3d and S10b, Supporting Information, OV‐BiOBr‐X (X = 1, 2, and 3) possess a higher photocurrent response than that of original BiOBr, whereas the photocurrent responses of DOV‐BiOBr‐H and DOV‐BiOBr‐C samples are lower than that of BiOBr, which reflects the introduction of surface OVs will promote the photogenerated electron–hole pairs transfer process. [ 50 ] All these photoelectrochemical results suggest that surface OVs engineering is beneficial to promote the separation of photoinduced charge and enhance the light absorption performance, thus boosting the CO 2 photoreduction process.…”

Section: Resultsmentioning

confidence: 99%

Oxygen Vacancies Engineering–Mediated BiOBr Atomic Layers for Boosting Visible Light‐Driven Photocatalytic CO₂ Reduction

et al. 2020

Self Cite

View full text Add to dashboard Cite

CO2 photoreduction into valuable chemicals is a sustainable and prospective technology to alleviate greenhouse effects and the energy crisis. However, the photocatalytic efficiency is impeded by undesirable recombination of photogenerated carriers and poor CO2 activation performance. Herein, oxygen vacancies (OVs) are introduced into BiOBr atomic layers by ultraviolet light assisting to increase the efficiency of carrier separation and CO2 adsorption–activation performance, enhancing the CO2 reduction activity. The introduction of OVs can effectively enhance the visible light absorption, boost the photogenerated carrier separation migration, and tune the adsorption/desorption process for CO2 and products on the surface of photocatalysts. The optimized OVs engineering–mediated photocatalyst achieves a high CO generation rate of 10.15 μmol g−1 under visible light irradiation for 5 h in pure water, which is 1.99 times compared with that of pristine BiOBr atomic layers. The possible photocatalytic mechanism is investigated by in situ Fourier transform infrared spectroscopy (in situ FT‐IR) spectrometry. Also, an opportunity to design OVs‐rich ultrathin semiconductors for high‐performance CO2 reduction is offered.

show abstract

Plasma-induced defect engineering: Boosted the reverse water gas shift reaction performance with electron trap

Cited by 34 publications

References 36 publications

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

In Situ Growth and Activation of Ag/Ag₂S Nanowire Clusters by H₂S Plasma Treatment for Promoted Electrocatalytic CO₂ Reduction

Oxygen Vacancies Engineering–Mediated BiOBr Atomic Layers for Boosting Visible Light‐Driven Photocatalytic CO₂ Reduction

Contact Info

Product

Resources

About

Plasma-induced defect engineering: Boosted the reverse water gas shift reaction performance with electron trap

Cited by 34 publications

References 36 publications

Accelerated Photoreduction of CO2 to CO over a Stable Heterostructure with a Seamless Interface

Accelerated Photoreduction of CO2 to CO over a Stable Heterostructure with a Seamless Interface

In Situ Growth and Activation of Ag/Ag2S Nanowire Clusters by H2S Plasma Treatment for Promoted Electrocatalytic CO2 Reduction

Oxygen Vacancies Engineering–Mediated BiOBr Atomic Layers for Boosting Visible Light‐Driven Photocatalytic CO2 Reduction

Contact Info

Product

Resources

About

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

Accelerated Photoreduction of CO₂ to CO over a Stable Heterostructure with a Seamless Interface

In Situ Growth and Activation of Ag/Ag₂S Nanowire Clusters by H₂S Plasma Treatment for Promoted Electrocatalytic CO₂ Reduction

Oxygen Vacancies Engineering–Mediated BiOBr Atomic Layers for Boosting Visible Light‐Driven Photocatalytic CO₂ Reduction