Incorporating Mn cation as anchor to atomically disperse Pt on TiO2 for low-temperature removal of formaldehyde

Jin, Chen; Jiang, Mao Fa; Xu, Wenjian; Chen, Jing; Hong, Zixiao; Jia, Hongpeng

doi:10.1016/j.apcatb.2019.118013

Cited by 119 publications

(64 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on theoretical calculations and thermodynamic analysis, Tang and coworkers found HCHO oxidation over SACs to follow metal-assisted MvK mechanism [49,57,136], the same as CO oxidation over Au/TiO2 [144]. Furthermore, Pt1/Mn-TiO2 also obeyed the MvK mechanism for HCHO oxidation [140]. Such a mechanism can be explained by first the dissociation of O2 to form activated O species (Oa) at the interface between active metal and support.…”

Section: Formaldehyde Catalytic Oxidation Reactionmentioning

confidence: 99%

“…Thus, methods of eliminating HCHO are vital for the environment and human health, and catalytic oxidation of HCHO is an efficient and promising approach to solve these issues. Note that the majority of studies have currently focused on K [136], Na [57], Ag [49], Au [137] and Pt [138][139][140] based SACs for HCHO catalytic oxidation.…”

Section: Formaldehyde Catalytic Oxidation Reactionmentioning

confidence: 99%

“…Though Pt-based catalysts have often been considered as versatile catalysts for catalytic oxidation reactions, Pt-based SACs exhibited completely different performances towards HCHO oxidation. For example, Jia and coworkers reported Mn cation doped TiO2 composite oxides supported atomic Pt (Pt/Mn-TiO2) SACs with good HCHO catalytic oxidation activity [140]. However, Sun et al reported that the single TiO2 supported Pt SAC displayed HCHO activity one order of magnitude lower than conventional Pt nanocatalysts [139].…”

Section: Formaldehyde Catalytic Oxidation Reactionmentioning

confidence: 99%

See 2 more Smart Citations

Single-atom site catalysts for environmental catalysis

et al. 2020

View full text Add to dashboard Cite

In recent decades, the environmental protection and long-term sustainability have become the focus of attention due to the increasing pollution generated by the intense industrialization. To overcome these issues, environmental catalysis has increasingly been used to solve the negative impact of pollutants emission on the global environment and human health. Supported platinum-metal-group (PGM) materials are commonly utilized as the state-of-the-art catalysts to eliminate gaseous pollutants but large quantities of PGMs are required. By comparison, single-atom site catalysts (SACs) have attracted much attention in catalysis owing to their 100% atom efficiency and unique catalytic performances towards various reactions. Over the past decade, we have witnessed burgeoning interests of SACs in heterogeneous catalysis. However, to the best of our knowledge, the systematic summary and analysis of SACs in catalytic elimination of environmental pollutants has not yet been reported. In this paper, we summarize and discuss the environmental catalysis applications of SACs. Particular focus was paid to automotive and stationary emission control, including model reaction (CO oxidation, NO reduction and hydrocarbon oxidation), overall reaction (three-way catalytic and diesel oxidation reaction), elimination of volatile organic compounds (formaldehyde, benzene, and toluene), and removal/decomposition of other pollutants (Hg 0 and SO 3). Perspectives related to further challenges, directions and design strategies of single-atom site catalysts in environmental catalysis were also provided.

show abstract

Section: Formaldehyde Catalytic Oxidation Reactionmentioning

confidence: 99%

Section: Formaldehyde Catalytic Oxidation Reactionmentioning

confidence: 99%

Section: Formaldehyde Catalytic Oxidation Reactionmentioning

confidence: 99%

See 1 more Smart Citation

Single-atom site catalysts for environmental catalysis

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Generally, noble metal species of supported noble metal catalyst as catalytic sites plays a key role in catalytic reaction. Thus, to expose more single‐atom Pt catalytic sites in Pt 1 /R‐Mn 2 O 3 ‐5D, chemical etching by H 2 O 2 to react with MnO x to form water‐soluble Mn 2+ was used to prepare x H 2 O 2 ‐Pt 1 /R‐Mn 2 O 3 ‐5D ( x =0.25, 0.5, 1.0 mL) based on our previous research (Figure A) . No change can be obviously observed in XPS results after treatment by different amount of H 2 O 2 except the gradually enhanced intensity of Pt 4+ signals (Supporting Information, Figure S6 and Table S2), which reflects surface Pt single atoms are increasingly exposed accompanying with the removal of covered MnO x .…”

Section: Figurementioning

confidence: 99%

Temperature‐Induced Structure Reconstruction to Prepare a Thermally Stable Single‐Atom Platinum Catalyst

2020

Self Cite

View full text Add to dashboard Cite

Single‐atom noble metals on a catalyst support tend to migrate and agglomerate into nanoparticles owing to high surface free energy at elevated temperatures. Temperature‐induced structure reconstruction of a support can firmly anchor single‐atom Pt species to adapt to a high‐temperature environment. We used Mn3O4 as a restructurable support to load single‐atom Pt and further turned into single‐atom Pt‐on‐Mn2O3 catalyst via high‐temperature treatment, which is extremely stable under calcination conditions of 800 °C for 5 days in humid air. High‐valence Pt4+ with more covalent bonds on Mn2O3 are essential for anchoring isolated Pt atoms by strong interaction. An optimized catalyst formed by moderate H2O2 etching exhibits the best performance and excellent thermal stability of single‐atom Pt in high‐temperature CH4 oxidation on account of more exposed Pt atoms and strong Pt‐Mn2O3 interaction.

show abstract

“…Based on our previous research, the redox reaction between MnO 2 and H 2 O 2 is feasible to consume H + , which can promote the hydrolysis and deposition of introduced metal ions on the surface of MnO 2 . [15] Through the results of electron microscopy and X-ray absorption spectra (XAS), it was found that Cu species exists as the single-atom status to from CuÀ OÀ Mn entity on MnO 2 . This result indicates the existence of metal-support interaction between Cu single atoms and MnO 2 , which is beneficial to stabilize the atomic-level dispersion of Cu species.…”

Section: Introductionmentioning

confidence: 99%

Using the Interaction between Copper and Manganese to Stabilize Copper Single‐atom for CO Oxidation.

Jiang

Chen

Gao

et al. 2021

Chemistry A European J

Self Cite

View full text Add to dashboard Cite

The interaction between Cu and Mn has been used to immobilize the Cu single-atom on MnO 2 surface by redoxdriven hydrolysis. Comprehensive structure and property characterizations demonstrate that the existence of an CuÀ Mn interaction on the catalyst surface can effectively restrain the aggregation of Cu single atoms and improve carbon monoxide (CO) oxidation activity. The interaction of forming the CuÀ OÀ Mn entity is beneficial for CO catalytic activity as the migration of reactive oxygen species and the coordination effect of active centers accelerate the reaction. In particular, 3%-Cu 1 /MnO 2 shows an oxygen storage capacity (OSC) value (342.75 μmol/g) more than ten times that of pure MnO 2 (27.79 μmol/g) and has high CO catalytic activity (T 90% = 80°C), it can maintain CO conversion of 95 % after 15 cycles. This work offers a reliable method for synthesizing Cu singleatom catalysts and deepens understanding of the interaction effect between single transition metal atoms and supports that can improve the catalytic activity of CO oxidation.

show abstract

Incorporating Mn cation as anchor to atomically disperse Pt on TiO2 for low-temperature removal of formaldehyde

Cited by 119 publications

References 50 publications

Single-atom site catalysts for environmental catalysis

Single-atom site catalysts for environmental catalysis

Temperature‐Induced Structure Reconstruction to Prepare a Thermally Stable Single‐Atom Platinum Catalyst

Using the Interaction between Copper and Manganese to Stabilize Copper Single‐atom for CO Oxidation.

Contact Info

Product

Resources

About