Article
Chemistry, Physical
Xiaoyu Li, Yujia Han, Yike Huang, Jian Lin, Xiaoli Pan, Ziang Zhao, Yanliang Zhou, Hua Wang, Xiaofeng Yang, Aiqin Wang, Lin Li, Botao Qiao, Xiaodong Wang
Summary: Developing efficient CO selective methanation catalysts by utilizing hydrogenated TiO2 as support is a promising strategy, achieving CO removal below 10 ppm with over 50% selectivity in a wide temperature range and good long-term stability. Detailed characterizations and calculations showed that the use of H-TiO2 strengthened CO adsorption on the catalyst surface, leading to improved CO activation and selectivity enhancement.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Biochemistry & Molecular Biology
Diego Mateo, Juan Carlos Navarro, Il Son Khan, Javier Ruiz-Martinez, Jorge Gascon
Summary: Photo-thermal catalysis using nanostructures with localized surface plasmon resonance (LSPR) has become a promising strategy for solar fuel or chemical production. This study demonstrates that titanium nitride (TiN) tubes derived from TiO2 precursor possess excellent light absorption properties and, when combined with ruthenium (Ru) nanoparticles, exhibit high activity for the photo-thermal CO2 reduction reaction.
Article
Chemistry, Physical
Sebastian Cisneros, Shilong Chen, Thomas Diemant, Joachim Bansmann, Ali M. Abdel-Mageed, Michael Goepel, Sine E. Olesen, Eike S. Welter, Magdalena Parlinska-Wojtan, Roger Glaeser, Ib Chorkendorff, R. Juergen Behm
Summary: In this study, four different Ru/TiO2 catalysts were prepared and examined to investigate the impact of SiO2 content on the catalysts' performance in selective CO methanation. The results showed a volcano-shaped dependence of methane formation activity on SiO2 content, with the maximum activity observed at 4-8 wt.%. Additionally, weaker CO adsorption strength was found in the most active catalysts, indicating a complex combination of different effects contributing to the higher activity and lower CO adsorption strength.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
L. F. Bobadilla, A. Munoz-Murillo, J. Gandara-Loe, A. Perez, O. H. Laguna, T. L. M. Martinez, A. Penkova, M. A. Centeno, J. A. Odriozola
Summary: This study focuses on the development of efficient catalysts for selective CO methanation in practical conditions. The results show that Rh significantly enhances the activity and selectivity, while Pt has a negative effect. These findings suggest that RuRh-based catalysts could be important for treating industrial-volume streams.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Somchate Wasantwisut, Yuchen Xiao, Pingyun Feng, Kandis Leslie Gilliard-Abdul-Aziz
Summary: The performance of Co and Co-Ru catalysts supported on two different types of TiO2 supports was studied, and it was found that the addition of Ru to TiO2* support can reduce carbon deposition and influence oxygen mobility. Co and Co-Ru catalysts supported on TiO2* exhibit higher catalytic activity, but Co-Ru/TiO2* catalysts have limited stability.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Physical
T. L. M. Martinez, A. Munoz, A. Perez, O. H. Laguna, L. F. Bobadilla, M. A. Centeno, J. A. Odriozola
Summary: The aim of this study was to investigate the influence of the support on the CO selective methanation reaction using Ru/TiO2 catalysts. The results showed that the activity and selectivity changes were related to the anatase:rutile ratio, solid solution formation of RuO2 +TiO2, metal content, and thermal treatment. These characteristics led to the formation of active and selective catalysts. It was found that the presence of hydroxyl groups on the support surface played a crucial role in the activity and selectivity of Ru/TiO2 catalysts during CO activation.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Chemistry, Physical
Hong-Yan Ma, Gui-Chang Wang
Summary: This study reveals a strong relationship between the Ru-Ru coordination number and the CO2 methanation reactivity/selectivity. The selectivity for CH4 increases as the Ru coordination number increases from 3 to 5.5, with Ru4/Ru(0001) showing almost 100% selectivity for CH4. However, the selectivity for CO is higher on Ru ensembles with lower coordination numbers. Metal nanoparticles with more five-coordinated Ru-Ru configurations are suggested to be beneficial for CO2 methanation.
APPLIED SURFACE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Susilawati Toemen, Siti Fadziana Sulaiman, Salmiah Jamal Mat Rosid, Wan Azelee Wan Abu Bakar, Wan Nur Aini Wan Mokhtar, Renugambaal Nadarajan, Khalida Muda, Sarina Mat Rosid
Summary: The study found that cerium played a key role as the basic catalyst in the trimetallic catalyst, demonstrating excellent redox characteristics suitable for CO2 methanation reaction. The resulting Ru/Mg/Ce/Al2O3 catalyst, prepared under appropriate conditions, effectively converted CO2 to CH4.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Zhujie He, Huanfeng Huang, Zhuodi Chen, Yuqian Liang, Zhixiang Huang, Shunlian Ning, Lilin Tan, Mihail Barboiu, Dawei Wang, Cheng-Yong Su
Summary: Catalytic CO2 methanation has significant applications in various industrial fields, and the development of advanced heterogeneous catalysts for this process is challenging. In this study, we developed a TiH2-supported Ru catalyst with enhanced CO intermediate activation capability. The optimized catalyst exhibited notable CH4 selectivity and production rate, surpassing pure Ru nanoparticles. This work provides valuable insights for the development of highly efficient CO2 conversion catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Zhihao Liu, Xinhua Gao, Bo Liu, Wenlong Song, Qingxiang Ma, Tian-sheng Zhao, Xu Wang, Jong Wook Bae, Xingjun Zhang, Jianli Zhang
Summary: A series of layered Co-Al-O catalysts were prepared via a hydrothermal method and reduced at different temperatures. The results showed that the Co-0 content and basic sites on the catalysts increased and then decreased with the reduction temperature, leading to effective hydrogen dissociation and CO2 adsorption. The CoAl-O-600 catalyst exhibited superior performance in CO2 methanation at low temperature and showed excellent resistance to coking and sintering.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Environmental
Yan Resing Dias, Oscar W. Perez-Lopez
Summary: Mitigating CO2 emissions has become an important issue nowadays, and converting CO2 to CH4 as a natural gas substitute and H2 storage source is an interesting alternative. In this study, Ni/SiO2 catalysts promoted by Fe, Co and Zn were prepared and showed improved performance in CO2 conversion to methane, with Ni-Co/SiO2 achieving the best results in terms of CO2 conversion and CH4 selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Zhisheng Shi, Jiacheng Feng, Xinfa Dong
Summary: This study develops Ru-Ni bimetallic catalysts supported on graphene aerogel-mixed metal oxide (GA-MMO) as an efficient CO selective methanation (CO-SMET) for H2-rich gases purification. The GA-MMO aerogel with a three-dimensional network structure exhibits higher specific surface area, better thermal stability, and more defects or structural disorders at the MMO:GO mass ratio of 1-4. The Ru-loaded GA-MMO catalyst enhances reactivity through the reduction of NiO to metallic Ni by hydrogen spillover effect. Compared to the MMO-supported Ru-Ni catalyst, the GA-MMO supported catalyst shows better catalytic performance and stability due to its excellent metal dispersion, reducibility, stronger CO adsorption, and activation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Surachet Hongkailers, Yaxuan Jing, Yanqin Wang, Napida Hinchiranan, Ning Yan
Summary: The upcycling of spent plastics has become a more urgent topic due to the rapid generation of plastic waste. The conversion of PET into arenes was demonstrated using a Co/TiO2 catalyst, achieving a TPA conversion rate of 75.2 mol% under optimized conditions.
Article
Chemistry, Physical
Yaru Zhang, Wenjie Yan, Haifeng Qi, Xiong Su, Yang Su, Xiaoyan Liu, Lin Li, Xiaofeng Yang, Yanqiang Huang, Tao Zhang
Summary: The study suggests a novel mechanism of generating strong metal-support interactions in supported metal catalysts, which can enhance the catalytic activity and selectivity of the catalysts. This finding provides an alternative pathway for modulating the catalytic properties of supported metal catalysts.
Article
Chemistry, Physical
Wei Wang, Ekaterina Toshcheva, Adrian Ramirez, Genrikh Shterk, Rafia Ahmad, Mustafa Caglayan, Jose Luis Cerrillo, Abhay Dokania, Gerard Clancy, Tuiana B. Shoinkhorova, Nibras Hijazi, Luigi Cavallo, Jorge Gascon
Summary: The synthesis of K-promoted Fe-Co bimetallic catalysts through a modified one pot sol-gel approach and their performance for the selective hydrogenation of CO2 to liquid hydrocarbons were reported. The high dispersion of K and Co on the catalysts was achieved, and both K and Co significantly influenced catalyst activity and selectivity. The addition of K increased the affinity of the catalyst towards the adsorbed species, while the presence of Co facilitated the spontaneous dissociation of H2. The optimized catalyst exhibited a C-5(+) space time yield of 15.8 mmol g(cat.)^(-1) h^(-1) with a C-5(+) selectivity of 51% at a CO2 conversion of 35%.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
