Boosting selective hydrogenation through hydrogen spillover on supported-metal catalysts at room temperature

Zhang, Sai; Xia, Zhaoming; Zhang, Mingkai; Zou, Yong; Shen, Haidong; Li, Jiayuan; Chen, Xiao; Qu, Yongquan

doi:10.1016/j.apcatb.2021.120418

Cited by 73 publications

(38 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies suggested that the metal sites in supported metal/oxide catalysts were able to dissociate hydrogen (H 2 ), while the oxide and the metal–oxide interface were responsible for the adsorption and activation of CO 2 . − Therefore, the type of oxide support and the construction of the metal–oxide interface were also important to promote the performance of CO 2 methanation . Titanium dioxide (TiO 2 ) has been widely used as the catalyst support in thermocatalysis due to its low price, high stability, and abundant oxygen vacancies. − Liu and co-workers highlighted the importance of oxygen vacancies for the adsorption of CO 2 , showing that CO 2 bonds weakly on the surface of a silica-supported platinum catalyst (Pt/SiO 2 ) due to the nonreducibility of SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Rutile Content on the Catalytic Performance of Ru/TiO₂ Catalyst for Low-Temperature CO₂ Methanation

Zhao

Jiang

Wang

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Hydrogenation of carbon dioxide (CO2) to methane (CH4) bears the potential not only to alleviate excessive emission of CO2 but to produce clean energy for direct use. However, due to the high temperature required for the activation of CO2, it is necessary to develop a catalyst with high activity and high CH4 selectivity at low reaction temperature for CO2 methanation. In this study, we synthesized titanium dioxide (TiO2) supports with different rutile contents by calcination and investigated the relationship between the rutile content of TiO2 supports in Ru/TiO2 catalysts and their performance for low-temperature CO2 methanation. The characterization results indicated that Ru species grew preferentially on the rutile phase of the support TiO2, and the interaction between Ru species and TiO2 became stronger with increasing rutile content. In addition, the concentration of oxygen vacancies on the support, which would provide more adsorption sites for CO2, increased with the decreasing rutile content. The best reactivity was achieved with a rutile content between 15% and 30%. This work included a thorough investigation on the effect of rutile content on the performance of low-temperature CO2 methanation and provided guidance for the preparation of Ru/TiO2 catalyst with high activity.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Rutile Content on the Catalytic Performance of Ru/TiO₂ Catalyst for Low-Temperature CO₂ Methanation

Zhao

Jiang

Wang

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…This speculation is supported by a WO 3 discoloration experiment, which visually confirmed that Pt single atoms increase the H a supply (Figure S10). , …”

Section: Resultsmentioning

confidence: 99%

Chemoselective Hydrogenation of Nitro Compounds by MoS₂ via Introduction of Independent Active Hydrogen-Donating Sites

Zhang

Cai

et al. 2022

ACS Catal.

View full text Add to dashboard Cite

The chemoselective hydrogenation of nitro compounds is limited by a trade-off between the activity and selectivity of catalysis. It is found that MoS2-based catalysts can replace noble metals to achieve nearly 100% selectivity toward hydrogenation to aromatic amines. However, the insufficient supply of active hydrogen (Ha) limits the conversion to a low level. To break the trade-off between activity and selectivity, a dual-active site catalyst was designed using exfoliated MoS2 as a support and modifying it with single-atom Pt as independent, active hydrogen-donating sites. Isolated Pt atoms continuously provide Ha to the hydrogenation sites of MoS2. This strategy solves the problem of insufficient Ha supply, which is caused by the competitive adsorption of nitro groups and hydrogen on MoS2, by matching the rate of Ha production and Ha consumption, resulting in a greatly increased reaction rate.

show abstract

“…The highly selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) at low temperatures was obtained by constructing the dual active site with PtCo alloy loaded on hydroxy-rich CoBO x . [136] Here, the PtCo alloy activates the H 2 molecule, while the abundant hydroxy groups on the CoBO x support activate the aldehyde group in CAL as the second active site and promote the spillover diffusion of active hydrogen on the CoBO x surface, which realizes the selective hydrogenation of CAL on the support, as shown in Figure 19b.…”

Section: Surface Functional Groupsmentioning

confidence: 98%

Hydrogen Spillover‐Enhanced Heterogeneously Catalyzed Hydrodeoxygenation for Biomass Upgrading

Geng

2022

ChemSusChem

View full text Add to dashboard Cite

Hydrodeoxygenation (HDO) is regarded as a promising technology for biomass upgrading to obtain sustainable and competitive chemicals and fuels. In fact, biomass HDO over heterogeneous solid catalysts is often accompanied by the phenomenon of hydrogen spillover, which further affects the catalytic performance. Thus, it is necessary to gain in‐depth understand the promoting effect of hydrogen spillover in the biomass HDO process to obtain desired conversion and selectivity. This Review summarized the extensive research on hydrogen spillover in biomass refining and discussed in detail the regulation mechanism of hydrogen spillover in biomass HDO process, mainly by regulating different active center sites on catalyst supports, such as metal sites, acid sites, surface functional groups, and defective sites, which exhibit independent and synergistic characteristics promoting catalyst activity, selectivity, and stability. Finally, the prospective of hydrogen spillover in biomass HDO applications was critically evaluated, and the key technical challenges in developing “hydrogen‐free” HDO and upgrading biofuels were highlighted. The presentation of hydrogen spillover‐enhanced catalytic biomass HDO in this Review will hopefully provide insight and guidance for further development of efficient catalysts and preparation of high‐value chemicals in the future.

show abstract

Boosting selective hydrogenation through hydrogen spillover on supported-metal catalysts at room temperature

Cited by 73 publications

References 56 publications

Effect of Rutile Content on the Catalytic Performance of Ru/TiO₂ Catalyst for Low-Temperature CO₂ Methanation

Effect of Rutile Content on the Catalytic Performance of Ru/TiO₂ Catalyst for Low-Temperature CO₂ Methanation

Chemoselective Hydrogenation of Nitro Compounds by MoS₂ via Introduction of Independent Active Hydrogen-Donating Sites

Hydrogen Spillover‐Enhanced Heterogeneously Catalyzed Hydrodeoxygenation for Biomass Upgrading

Contact Info

Product

Resources

About

Boosting selective hydrogenation through hydrogen spillover on supported-metal catalysts at room temperature

Cited by 73 publications

References 56 publications

Effect of Rutile Content on the Catalytic Performance of Ru/TiO2 Catalyst for Low-Temperature CO2 Methanation

Effect of Rutile Content on the Catalytic Performance of Ru/TiO2 Catalyst for Low-Temperature CO2 Methanation

Chemoselective Hydrogenation of Nitro Compounds by MoS2 via Introduction of Independent Active Hydrogen-Donating Sites

Hydrogen Spillover‐Enhanced Heterogeneously Catalyzed Hydrodeoxygenation for Biomass Upgrading

Contact Info

Product

Resources

About

Effect of Rutile Content on the Catalytic Performance of Ru/TiO₂ Catalyst for Low-Temperature CO₂ Methanation

Effect of Rutile Content on the Catalytic Performance of Ru/TiO₂ Catalyst for Low-Temperature CO₂ Methanation

Chemoselective Hydrogenation of Nitro Compounds by MoS₂ via Introduction of Independent Active Hydrogen-Donating Sites