Selective photocatalytic CO2 reduction to CH4 over Pt/In2O3: Significant role of hydrogen adatom

Wang, Yabo; Zhao, Jie; Li, Yingxuan; Wang, Chuanyi

doi:10.1016/j.apcatb.2018.01.005

Cited by 152 publications

(61 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After Ru introduction, no obvious change occurs in the characteristic peaks of CdS. Also, no typical diffraction peaks assigned to the oxide or metal state of Ru can be observed even if the loading content of Ru is raised to 2.56%, which is ascribed to small size and/or high dispersion of Ru species [2a,14] …”

Section: Resultsmentioning

confidence: 97%

“…[ 1 ] Hence, using the abundant solar energy to convert CO 2 into carbon‐based fuels such as CO and CH 4 , which are commonly produced in the solid–gas system, can simultaneously solve the energy and environmental issues. [ 2 ] Encouraged by the pioneering work that Inoue and coworkers had achieved on TiO 2 in 1979, many subsequent studies have been continued to design and fabricate highly efficient catalysts. [ 3 ] Technically, photocatalytic reduction of CO 2 into CO and CH 4 is thermodynamically uphill and requires multiple electrons and protons to break CO band and form CH bond (CO 2 + 2 H + +2e − → CO + H 2 O ( E θ =−0.53 eV) and CO 2 + 8 H + + 8e − → CH 4 + 2H 2 O ( E θ =−0.24 eV)) [3b,4] .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Anchoring Single‐Atom Ru on CdS with Enhanced CO₂ Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO₂ Reduction to Solar Fuels

Cai

Zhang

et al. 2020

Solar RRL

View full text Add to dashboard Cite

Using renewable solar energy to CO2 conversion to chemical fuels has been widely perceived as an alternative solution for simultaneously tackling the energy crisis and the greenhouse effect. Herein, the selectivity of the photothermocataltytic CO2 reduction with H2O vapor by single‐atom dispersed‐Ru loaded CdS is regulated. Under full solar spectrum irradiation, CO as the main product with 97.2% selectivity is observed on bare CdS, whereas the intentional introduction of optimized amount of Ru metal enables CO2 reduction to CH4 with 97.6% selectivity. A series of experiments and characterizations reveal that the single‐atom dispersed Ru serves as adsorption and active sites of CO2 molecules as well as electron traps, resulting in great improvement in CO2 uptake capability of the catalyst and the effective suppression in the recombination of photogenerated carriers. Moreover, the thermal effect synchronously induced by light has a positive influence on photocatalysis, which can prominently enhance the catalytic activity without altering the product selectivity.

show abstract

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Anchoring Single‐Atom Ru on CdS with Enhanced CO₂ Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO₂ Reduction to Solar Fuels

Cai

Zhang

et al. 2020

Solar RRL

View full text Add to dashboard Cite

show abstract

“…5a. The first kind of species with fingerprint modes at 1505, 1465, and 1375 cm −1 can be assigned to chemisorbed CO 2 species including bicarbonate (HCO 3 − ) and carbonate (CO 3 2 − ) 44–47 . The second kind of species signaled by fingerprint modes at 1580 and 1360 cm −1 can be attributed to the asymmetric and symmetric OCO stretching vibrations of adsorbed bidentate formate (HCOO*) species.…”

Section: Resultsmentioning

confidence: 99%

Polymorph selection towards photocatalytic gaseous CO2 hydrogenation

et al. 2019

View full text Add to dashboard Cite

Titanium dioxide is the only known material that can enable gas-phase CO 2 photocatalysis in its anatase and rutile polymorphic forms. Materials engineering of polymorphism provides a useful strategy for optimizing the performance metrics of a photocatalyst. In this paper, it is shown that the less well known rhombohedral polymorph of indium sesquioxide, like its well-documented cubic polymorph, is a CO 2 hydrogenation photocatalyst for the production of CH 3 OH and CO. Significantly, the rhombohedral polymorph exhibits higher activity, superior stability and improved selectivity towards CH 3 OH over CO. These gains in catalyst performance originate in the enhanced acidity and basicity of surface frustrated Lewis pairs in the rhombohedral form.

show abstract

“…The photocatalytic CO 2 reduction performance was evaluated in the presence of H 2 O vapor, involving a gas–solid heterogeneous reaction. CO and CH 4 were detected as the main products in our reaction system (Figure S2), in line with the previous reports using a similar method . The generation rates of CO, CH 4 , and active electrons are summarized in Figure a.…”

Section: Resultsmentioning

confidence: 99%

In Situ‐Fabricated 2D/2D Heterojunctions of Ultrathin SiC/Reduced Graphene Oxide Nanosheets for Efficient CO₂ Photoreduction with High CH₄ Selectivity

Han

Lei²,

Wang

et al. 2018

ChemSusChem

View full text Add to dashboard Cite

Photoreduction of CO2 into fuel molecules such as CH4 represents a promising route to simultaneously explore renewable energy and alleviate global warming. However, the implementation of such a process is hampered by low product yields and poor selectivity. A 2D/2D heterojunction of ultrathin SiC and reduced graphene oxide (RGO) nanosheets was fabricated in situ for efficient and selective photoreduction of CO2. Ultrathin SiC suppresses significant charge recombination in the bulk phase, thus providing more energetic electrons. The robust 2D/2D heterojunction allows fast transfer of energetic electrons from SiC to RGO. Combining the vital role of RGO in facilitating CO2 activation, the optimized SiC/RGO exhibits an electron‐transfer rate of 58.17 μmol h−1 g−1 towards CO2 reduction, 2.7 times that of pure SiC (20.25 μmol h−1 g−1). About 92 % of the transferred electrons from SiC are devoted to generating CH4 (6.72 μmol h−1 g−1). Such high efficiency and selectivity are mainly a result of the densely accumulated energetic electrons within RGO, which facilitate the eight‐electron process to produce CH4. This work will inspire the design of catalyst/cocatalyst systems for efficient and selective photoreduction of CO2.

show abstract

Selective photocatalytic CO2 reduction to CH4 over Pt/In2O3: Significant role of hydrogen adatom

Cited by 152 publications

References 66 publications

Anchoring Single‐Atom Ru on CdS with Enhanced CO₂ Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO₂ Reduction to Solar Fuels

Anchoring Single‐Atom Ru on CdS with Enhanced CO₂ Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO₂ Reduction to Solar Fuels

Polymorph selection towards photocatalytic gaseous CO2 hydrogenation

In Situ‐Fabricated 2D/2D Heterojunctions of Ultrathin SiC/Reduced Graphene Oxide Nanosheets for Efficient CO₂ Photoreduction with High CH₄ Selectivity

Contact Info

Product

Resources

About

Selective photocatalytic CO2 reduction to CH4 over Pt/In2O3: Significant role of hydrogen adatom

Cited by 152 publications

References 66 publications

Anchoring Single‐Atom Ru on CdS with Enhanced CO2 Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO2 Reduction to Solar Fuels

Anchoring Single‐Atom Ru on CdS with Enhanced CO2 Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO2 Reduction to Solar Fuels

Polymorph selection towards photocatalytic gaseous CO2 hydrogenation

In Situ‐Fabricated 2D/2D Heterojunctions of Ultrathin SiC/Reduced Graphene Oxide Nanosheets for Efficient CO2 Photoreduction with High CH4 Selectivity

Contact Info

Product

Resources

About

Anchoring Single‐Atom Ru on CdS with Enhanced CO₂ Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO₂ Reduction to Solar Fuels

Anchoring Single‐Atom Ru on CdS with Enhanced CO₂ Capture and Charge Accumulation for High Selectivity of Photothermocatalytic CO₂ Reduction to Solar Fuels

In Situ‐Fabricated 2D/2D Heterojunctions of Ultrathin SiC/Reduced Graphene Oxide Nanosheets for Efficient CO₂ Photoreduction with High CH₄ Selectivity