Article
Multidisciplinary Sciences
Wenchao Shangguan, Qing Liu, Ying Wang, Ning Sun, Yu Liu, Rui Zhao, Yingxuan Li, Chuanyi Wang, Jincai Zhao
Summary: This study presents the photocatalytic reduction of CO2 to CO using quantum-sized Au nanoparticles with the help of H2O, showing high activity and selectivity. The increased activity is attributed to surface Au-O species formed from H2O decomposition, optimizing the rate-determining steps and facilitating CO and O2 production.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Xuanwen Xu, Tsunehiro Tanaka, Kentaro Teramura
Summary: In this work, the performances of Ag-loaded Ga2O3 materials were examined for the photocatalytic conversion of CO2 by H2O. It was found that Ag-loaded fl-Ga2O3 exhibited high selectivity for CO evolution.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Chemical
Ling Tan, Kipkorir Peter, Jing Ren, Baoyang Du, Xiaojie Hao, Yufei Zhao, Yu-Fei Song
Summary: The rational design of CeO2-decorated LDH photocatalysts enabled efficient reduction of CO2 under visible light, producing syngas with a tunable ratio. The addition of an optimum amount of CeO2 promoted the photo-reduction of CO2, providing a promising route to enhance the performance of LDH-based photocatalysts.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Jie Zhou, Jie Li, Liang Kan, Lei Zhang, Qing Huang, Yong Yan, Yifa Chen, Jiang Liu, Shun-Li Li, Ya-Qian Lan
Summary: This study reports the development of a crystalline hetero-metallic cluster catalyst, MCOF-Ti6Cu3, based on the cooperation between MOF and COF. The catalyst exhibits efficient coupling of photocatalytic CO2 reduction and H2O oxidation by utilizing dynamic covalent bonds between clusters to promote photo-induced charge separation and transfer. The MCOF-Ti6Cu3 catalyst shows fine activity in the conversion of CO2 and water into HCOOH.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Rustam Tokpayev, Tamina Khavaza, Zair Ibraimov, Kanagat Kishibayev, Azhar Atchabarova, Saken Abdimomyn, Dinara Abduakhytova, Mikhail Nauryzbayev
Summary: This article investigates the process of supercritical-CO2 phosphogypsum (PG) conversion, specifically the conversion of PG into valuable materials such as construction materials, rare earth elements, and strontium salts. The process was optimized using experimental methods, resulting in the possibility of using fewer reagents and shorter conversion times compared to existing technologies.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Multidisciplinary
Tomomi Aoki, Kyoshiro Ichikawa, Kenta Sonoda, Muneaki Yamamoto, Tetsuo Tanabe, Tomoko Yoshida
Summary: Meso-porous alpha-Ga2O3 with significantly high photocatalytic activity for CO2 reduction with water has been successfully synthesized. The synthesis method involves hydroxidation and calcination to obtain the meso-porous material, which exhibits higher photocatalytic activity compared to previous studies using different types of Ga2O3.
Article
Chemistry, Physical
Hong Wang, Zhongming Wang, Mingquan Xiao, Zizhong Zhang, Xianzhi Fu, Wenxin Dai
Summary: By modifying black In2O3 with F- or NH2+ ions, enhanced selectivity to CH4 and methanol/carbon monoxide can be achieved through promoting electron transfer or constructing a hydrophobic layer, respectively. The formation of H+ or *H ions at In2+ and In3+ sites adjacent to oxygen vacancy defects (V-O-In2+) is crucial for regulating the product selectivity of CO2 reduction. This work contributes to the understanding of artificial photosynthesis.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Tomomi Aoki, Muneaki Yamamoto, Tetsuo Tanabe, Tomoko Yoshida
Summary: The photocatalytic activity of mixed phases of GaOOH/beta-Ga2O3 and alpha-Ga2O3/beta-Ga2O3 for CO2 reduction with water is investigated for the first time. Both mixed phases show higher activity than the original material of beta-Ga2O3, and the H-2 production rate is correlated to the specific surface area. The CO production rate for the alpha-Ga2O3/beta-Ga2O3 mixed phase is high and increases with the abundance rate of the alpha-Ga2O3 phase.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Xuanwen Xu, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka, Kentaro Teramura
Summary: We have surveyed non-metal inorganic cocatalysts for photocatalytic conversion of CO2 using H2O as an electron donor, and found that Zn-based compounds exhibit the best performance for CO evolution.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Meng Tian, Ya-Ge Liu, Jiawei Hou, Biyun Jing, Yuanyuan Zhang, Yueru Mu, Xue Sun, Hai-Ying Jiang
Summary: A series of Fe3O4/Ph-C C-Cu magnetic hybrids were synthesized using a repeatable photothermal method. The growth of Ph-C C-Cu on the surface of Fe3O4 in a different way significantly affected its physical properties and photocatalytic performance. Fe3O4/Ph-C C-Cu demonstrated excellent photocatalytic activity due to its large surface area and high efficiency in carrier generation, transfer, and separation. The degradation of PBP and HBB achieved high rates, indicating real photocatalytic processes.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Chemistry, Multidisciplinary
Chaitanya B. Hiragond, Niket S. Powar, Junho Lee, Su-Il In
Summary: Single-atom catalysts (SACs) have attracted attention for their suitability in various catalytic applications, particularly in photocatalytic CO2 reduction. The activity, selectivity, and stability of SACs depend on factors such as metal/support material, interaction between metal atoms and support, light-harvesting ability, and CO2 adsorption capacity. Understanding these factors is crucial for optimizing SACs in catalytic applications.
Article
Chemistry, Multidisciplinary
Xingdong Wang, Derrick Ng, Haoran Du, Christian H. H. Hornung, Anastasios Polyzos, Aaron Seeber, Hexing Li, Yuning Huo, Zongli Xie
Summary: In this study, copper decorated indium oxide rods were prepared via a simple wet chemistry method, showing high catalytic efficiency and selectivity in CO2 photoreduction. The addition of copper significantly improved the total conversion rates and regulated the product selectivity, suggesting the potential industrial applications of these composites.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Qingli Wang, Zerui Miao, Yanfeng Zhang, Tingjiang Yan, Lingpeng Meng, Xuxu Wang
Summary: Surface frustrated Lewis pairs (FLP) in bismuth oxybromide (BiOBr) are effective catalytic sites for photocatalytic reduction of CO2. The introduction of Ce4+ and oxygen vacancy enhances the catalytic properties. This study provides insights into the construction of efficient photocatalysts and the understanding of the photocatalytic mechanism at the atomic level.
Article
Chemistry, Physical
Irina Plesco, Vladimir Ciobanu, Tudor Braniste, Veaceslav Ursaki, Florian Rasch, Andrei Sarua, Simion Raevschi, Rainer Adelung, Joydeep Dutta, Ion Tiginyanu
Summary: A new type of photocatalyst based on a hexagonal network structure of gallium oxide has been proposed, which shows enhanced photocatalytic performance through functionalization with noble metals, demonstrating potential for environmental applications.
Article
Chemistry, Physical
Qiang Huang, Chengfan Fu, Yangyi Shen, Haowen Wang, Zhengben Wu, Zhiyu Liang, Changqing Tian, Daofu Wu, Fei Qi, Yayun Pu, Nan Zhang, Manjing Wang, Xiaosheng Tang
Summary: Efficient CO2 conversion was achieved for the first time by synergistic interaction between Cs2SnCl6 photocatalyst and H2O-assisted dielectric barrier discharge (DBD) plasma. The conversion ratio of plasma photocatalysis was 6.5% higher than that of plasma or photocatalysis alone, indicating the successful synergy between plasma catalysis and photocatalysis. The presence of H2O increased the CO2 conversion ratio by 50.6% due to enhanced charge transfer.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Applied
Xuanwen Xu, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka, Kentaro Teramura
Summary: Chromium-based cocatalysts affect H2 production in the overall water splitting reaction during the photo-catalytic conversion of CO2 with H2O. To understand the mechanism by which chromium species promote or suppress H2 evolution, the reaction was performed with the addition of chromate ions on different photocatalysts. It was observed that chromate ions suppress H2 evolution when the photocatalyst surface is highly protonated.
Article
Chemistry, Applied
Soichi Kikkawa, Kentaro Teramura, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka
Summary: Through in situ time-resolved XAS, the dynamic behavior of the formation of two-dimensional low-coordinated Pt particles through reduction of PtOx particles by H2 was observed. The reduction of relatively stabilized PtOx species occurred below 373 K, while the reduction of interfacial PtOx species on the γ-Al2O3 surface occurred above 373 K. The morphology changed from three-dimensional PtOx particles to two-dimensional low-coordinated Pt particles during the in situ reduction of PtOx/Al2O3 at 473 K, while at 373 K, the interfacial PtOx species remained after its reduction. This study demonstrated that in situ time-resolved XAS is one of the most definitive techniques to unveil the MSI effect during the reductive formation process of Pt nanoparticle catalysts loaded on γ-Al2O3.
Article
Chemistry, Applied
Saburo Hosokawa, Yudai Oshino, Kosuke Beppu, Toyokazu Tanabe, Teruki Motohashi, Hiroyuki Asakura, Kentaro Teramura, Tsunehiro Tanaka
Summary: Automotive exhaust gases containing harmful gases can be purified using Pd-loaded catalyst, and a material with high oxygen storage performance is crucial for effective purification. Pd/Ca2AlMnO5+8 demonstrates efficient purification of exhaust gases under fluctuating oxygen concentration due to its high oxygen release and storage capacities. The redox properties of the Mn species in Pd/Ca2AlMnO5+8 are responsible for the NO reduction behavior under fluctuating oxygen concentration, as observed from operando and static X-ray absorption fine structure (XAFS) spectra.
Article
Nanoscience & Nanotechnology
Yuji Yoshiyama, Saburo Hosokawa, Masaaki Haneda, Masashige Morishita, Hiroyuki Asakura, Kentaro Teramura, Tsunehiro Tanaka
Summary: An environmental catalyst was synthesized by substituting a transition metal (Mn, Fe, or Co) into the Ti site of SrTiO3, and its reactivity of lattice oxygen was evaluated. The Mn- and Co-doped SrTiO3 catalysts showed higher activities in CO oxidation compared to Pt/Al2O3 catalysts, despite having lower surface areas. Xray absorption fine structure (XAFS) measurements revealed that the lattice oxygen of Co-doped catalyst was released at the lowest temperature. Isotopic experiments indicated that the lattice oxygen participated in CO oxidation on Fe- and Co-doped catalysts via the Mars-van Krevelen mechanism, while the contribution of lattice oxygen to CO oxidation on Mn-doped catalyst was relatively negligible, following the Langmuir-Hinshelwood mechanism. This paper demonstrates that the catalytic mechanism can be adjusted by substituting transition metals into SrTiO3.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Xuanwen Xu, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka, Kentaro Teramura
Summary: Ag-loaded NaTaO(3 )was used for the photocatalytic conversion of CO2 using H2O as the electron donor. The effects of nanoparticle size, Ag loading, and crystal structure on the photocatalytic activity and CO selectivity were investigated. Ag-Cr dual cocatalysts were developed to maintain stable and selective CO production.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Eri Fudo, Hiroyuki Asakura, Atsuhiro Tanaka, Hiroshi Kominami
Summary: Investigations have been conducted on water splitting for efficient hydrogen production. The study focused on using the surface plasmon resonance of gold nanoparticles and tantalum pentoxide as the supporting material. The results showed successful production of hydrogen and oxygen under visible light irradiation using a plasmonic photoanode.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Physical
Lidan Deng, Zheng Wang, Xingmao Jiang, Jie Xu, Zijian Zhou, Xiaozhong Li, Zhixiong You, Mingyue Ding, Tetsuya Shishido, Xiaowei Liu, Minghou Xu
Summary: This study demonstrates an efficient method for the synthesis of formaldehyde from CO2 through water catalysis, achieving high conversion and yield even at room temperature and ambient pressure. HCOOH is identified as an important reaction intermediate, and the presence of surface -OH groups in LDH and the hybrid electronic state of Ru catalyst contribute to the highly efficient formation of formaldehyde.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Chunqiu Han, Yuehan Cao, Wang Yu, Zeai Huang, Fan Dong, Liqun Ye, Shan Yu, Ying Zhou
Summary: By selectively cleaving the C-O bonds in CH3O* intermediates instead of the metal-O bonds, the formation of peroxidation products can be significantly prevented, thus modulating the conversion pathway of methane. This method allows methane to be converted to methanol with a higher rate (325.4 mu mol g(-1) h(-1)) and selectivity (87.0%) under room temperature and atmospheric pressure without the need for external oxidants.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Shanshan Chen, Swarnava Nandy, Junie Jhon M. Vequizo, Takashi Hisatomi, Mamiko Nakabayashi, Zhenhua Pan, Qi Xiao, Zheng Wang, Lihua Lin, Song Sun, Kosaku Kato, Akira Yamakata, Naoya Shibata, Tsuyoshi Takata, Fuxiang Zhang, Kazunari Domen
Summary: This study demonstrates an efficient utilization of charge carriers on LTCA for Z-scheme overall water splitting through Ga-doping and Rh cocatalyst deposition, leading to improved charge transfer and catalytic conversion.
Article
Chemistry, Physical
Masashige Morishita, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka, Kentaro Teramura
Summary: This study demonstrates that the photocatalytic activity and selectivity for CO evolution during the selective photo-catalytic conversion of CO2 to CO are influenced by reaction conditions such as additive concentration, CO2 partial pressure, and reaction temperature. It was found that the rate of CO formation increased with CO2 partial pressure and decreased with proton (H+) concentration in the reaction solution. A mathematical expression was developed to describe the formation rate of CO with CO2 partial pressure and pH as variables, based on kinetics and considering the equilibria of surface hydroxyl groups. This study contributes to the development of CO2 recycling technologies by providing a mathematical expression for photocatalytic CO2 conversion in water.
Review
Chemistry, Physical
Junbu Wang, Zhiqiang Rao, Zeai Huang, Yaolin Chen, Fang Wang, Ying Zhou
Summary: Methane, as a raw material for the C1 chemical industry, is difficult to convert into more useful hydrocarbons and hydrogen due to thermodynamic limitations. Non-oxidative coupling of methane to produce ethane and hydrogen is a promising supply technology. Progress has been made in designing and applying catalysts, such as thermal and photocatalysts, for this technology. This review outlines typical catalysts, reviews the progress in understanding reaction mechanisms, and presents suggestions for the development of high-selectivity and high-stability catalysts in the future.
Article
Chemistry, Physical
Shuyu Liang, Tianyu Zhang, Yue Zheng, Tianshan Xue, Zheng Wang, Qiang Wang, Hong He
Summary: Increasing the accessibility of active sites can enhance electrocatalytic activity. Single-atom catalysts claim to achieve 100% atomic utilization but may have buried and inaccessible single-atom sites in practice. This study compares two Ni, N-doped carbon catalysts and shows that the Ni-Nx/Carbon black catalysts with lower Ni loading exhibit higher activity for CO production due to the exposed and utilized single-atom sites. The work highlights the significance of increasing the utilization of single-atom sites.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Zhiqiang Rao, Kaiwen Wang, Yuehan Cao, Yibo Feng, Zeai Huang, Yaolin Chen, Shiqian Wei, Luyu Liu, Zhongmiao Gong, Yi Cui, Lina Li, Xin Tu, Ding Ma, Ying Zhou
Summary: In this study, highly durable dry reforming of methane (DRM) at low temperatures was achieved through the integration of light irradiation and active site engineering. Two targeted reaction paths for the production of the key intermediate (CH3O*) were successfully constructed by fabricating active sites with Ni-O coordination and Ni-Ni coordination, respectively. The operando diffuse reflectance infrared Fourier transform spectroscopy coupled with steady-state isotopic transient kinetic analysis (operando DRIFTS-SSITKA) was used to track the anticoking paths during the DRM process. The findings provide critical insights into the simultaneous achievement of low-temperature and anticoking DRM process.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Kousuke Nakanishi, Sakae Araki, Kousuke Nomoto, Yuichi Onoue, Ryosuke Yagi, Hiroyuki Asakura, Atsuhiro Tanaka, Tsunehiro Tanaka, Hiroshi Kominami
Summary: Our previous study found that ring hydrogenation of benzoic acid on a titanium(iv) oxide (TiO2) photocatalyst requires a rhodium (Rh) cocatalyst. In this study, we investigated ring hydrogenation without Rh by using ruthenium (Ru) and palladium (Pd) as cocatalysts on TiO2. The bimetallic system of Ru-Pd/TiO2 successfully produced cyclohexanecarboxylic acid as the hydrogenation product, suggesting its potential as a substitute for Rh in the reaction. The study further analyzed the state and distribution of Ru and Pd on TiO2 particles and discussed their roles based on characterization and activity tests.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
