Article
Chemistry, Applied
Tao Liu, Xiaoqiu Ju, Zhixin Hu, Rongrong Xie
Summary: The confinement effect of ordered mesoporous SiO2 was found to effectively inhibit the aggregation of CoOx, promoting the formation of Co(III) species and enhancing the catalytic activity for CO oxidation. Additionally, the pore size of the carrier SBA-15 played a significant role in the catalytic activity of CoOx.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Environmental Sciences
Sajad Mobini, Mehran Rezaei, Fereshteh Meshkani
Summary: Co-Fe, Cu-Cr, and Co-Mn mixed oxide catalysts were prepared using a one-pot hard template synthesis method, and their catalytic performance significantly improved after rearrangement of the template, with increased specific surface area and reducibility. The CoMn catalyst showed the most promising catalytic performance with a reduced 100% conversion temperature. However, the presence of water vapor was found to decrease the activity and stability of the catalyst, with a calculated activation energy of 59.5 kJ/mol for the Co-Mn catalyst, confirming the MVK mechanism as the most probable reaction mechanism.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Lei Li, Qilei Yang, Bin Wang, Dong Wang, Yue Peng, Junhua Li, John Crittenden
Summary: The study presents a simple and efficient strategy for preparing supported metal (oxide) nanoparticle catalysts with high loading and small nanoparticle size. The synthesized catalyst shows superior performance compared to traditional methods, attributed to the strong size-dependent effect and interaction between cobalt oxides and supports. This preparation strategy opens up a new pathway for highly loaded and dispersed supported heterogeneous catalysts.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Ning Xi, Yanmei Zang, Xiaowen Sun, Jiayuan Yu, Mats Johnsson, Ying Dai, Yuanhua Sang, Hong Liu, Xiaowen Yu
Summary: Earth-abundant transition metal oxides, such as CoO and Co3O4, grown on carbon fiber paper (CFP) electrodes, exhibit different catalytic activities for the oxidation of glycerol, diols, and monohydric alcohols. In situ electrochemical tests show that the CoO/CFP electrode has higher catalytic activity than the Co3O4/CFP electrode, with lower interfacial impedance, higher charge transfer, and faster oxidation rate. The CoO/CFP electrode also produces value-added products with high selectivity and efficiency at low energy consumptions. Theoretical calculations highlight the importance of octahedrally coordinated Co-O sites in the adsorption, activation, and oxidation of C3-C1 alcohols. These findings provide insights for the design of highly efficient transition metal oxide catalysts for alcohol oxidation.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Nadeem Asghar Khan, Iqbal Ahmad, Naghmana Rashid, Muhammad Nadeem Zafar, Farooq Khurum Shehzad, Zahid Ullah, Anwar Ul-Hamid, Muhammad Faizan Nazar, Muhammad Junaid, Muhammad Faheem, Syed Salman Shafqat, Uzma Jabeen, Alaa Dahshan
Summary: This study synthesized Co3O4, Co9S8, and their heterostructure Co3O4/Co9S8 as water oxidation catalysts, and found that the Co3O4/Co9S8 heterostructure showed excellent electrocatalytic activity at low onset potential, along with good long-term stability and a low Tafel slope.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Mojtaba Ghiassee, Mehran Rezaei, Fereshteh Meshkani, Sajad Mobini
Summary: Mn/Co mixed powders prepared by coprecipitation method showed excellent catalytic performance in low-temperature CO oxidation, with the best performance observed at a Mn/Co molar ratio of 1:1. Incorporation of 1wt.% Pd further enhanced the catalytic activity, with the catalyst exhibiting 100% CO conversion at 80 degrees C.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Yibo Song, Siyuan Hu, Dongren Cai, Jingran Xiao, Shu-Feng Zhou, Guowu Zhan
Summary: This study immobilized cobalt phthalocyanine (CoPc) molecules on a Ce-based metal-organic framework (Ce-BTC) and converted it to mesoporous CeO2, achieving molecular-level dispersion of CoPc on the surface of CeO2. The resulting CoPc/CeO2 catalysts showed good CO oxidation performance. The mixing manner of Ce-BTC and CoPc significantly affected the physicochemical properties and catalytic performance, indicating the promising potential of Ce-BTC-mediated CoPc loading strategy for heterogenization of catalytic biomolecules.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Yibo Song, Siyuan Hu, Dongren Cai, Jingran Xiao, Shu-Feng Zhou, Guowu Zhan
Summary: Immobilizing biomolecules on a metal oxide support can enhance catalytic activity and stability, with cobalt phthalocyanine molecules successfully anchored on a Ce-based metal-organic framework to produce CoPc/CeO2 catalysts exhibiting good CO oxidation performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Piyali Chatterjee, Amit K. Chakraborty
Summary: The incorporation of cobalt ferrite nanocrystals in tungsten oxide photoanode successfully inhibits the fast recombination process of photo generated electrons and holes, leading to a significant enhancement in photocurrent output. Characterization results showed a reduction in the onset potential and a 10-fold increase in photocurrent output for the composite photoanode compared to the bare tungsten oxide photoanode.
Article
Materials Science, Multidisciplinary
Masatomo Hattori, Shuhei Nakakura, Hirokazu Katsui, Takashi Goto, Masakuni Ozawa
Summary: Cobalt oxide (Co3O4) catalysts supported on alpha-Al2O3 were prepared by a rotary chemical vapor deposition (CVD) method. Despite the low Co3O4 content, the catalyst exhibited significant catalytic activity for CO oxidation, which was attributed to the finely controlled dispersibility of Co3O4 on the alpha-Al2O3 surface.
Article
Chemistry, Physical
Namgi Jeon, Jungmok Oh, Akhil Tayal, Beomgyun Jeong, Okkyun Seo, Sujin Kim, Iljun Chung, Yongju Yun
Summary: Co-based catalysts on Al2O3 support with different compositional distribution of Co species were prepared by heat-treating the precursor under O2, Ar, and H2 atmospheres. The H2-treated catalyst showed superior PDH performance due to higher Co surface concentration and higher ratio of tetrahedral Co2+ in Co-Al2O4. Both tetrahedral Co2+ and metallic Co were found to be active for PDH, with the former showing higher selectivity.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Chang Liu, Ana M. Geer, Christopher Webber, Charles B. Musgrave, Shunyan Gu, Grayson Johnson, Diane A. Dickie, Sonia Chabbra, Alexander Schnegg, Hua Zhou, Cheng-Jun Sun, Sooyeon Hwang, William A. Goddard, Sen Zhang, T. Brent Gunnoe
Summary: In this study, two cobalt complexes with nitrogen atom donors were synthesized and investigated for their electrocatalytic water oxidation activity when supported on ordered mesoporous carbon. Results showed that 6-FP-Co-OMC-1 exhibited higher activity compared to 5-FP-Co-OMC-2, attributed to higher turnover frequency and better structural stability. The study also revealed that the ligand structure influences the catalytic activity of supported molecular catalysts in electrocatalytic water oxidation.
Article
Chemistry, Physical
Baojun Ma, Yuying Dang, Dekang Li, Xiaoyan Wang, Keying Lin, Wei Wang, Xin Zhou, Yifan Chen, Tengfeng Xie, Xianwen Zhang, Hongxian Han
Summary: A new Yin-Yang hybrid co-catalyst has been proposed for efficient water splitting, showing higher activity compared to traditional spatially separated dual co-catalysts. The superior performance is attributed to the adjacent spatial configuration, extra use of surface excitons, and more favorable water molecular absorption.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Multidisciplinary
Yingguang Zhang, Chi-Kin Jenkin Tsui, Chi-Ying Vanessa Li, Kwong-Yu Chan, Dennis Y. C. Leung, Sam M. Sit, Ching-Kit Ho, Ka Ming Leung, Changzhong Liao
Summary: The synthesis of ordered mesoporous CexZr1-xO2 catalyst, with high surface area and pore volumes, demonstrates superior CO oxidation performance at lower temperatures. The catalyst also shows excellent activity and thermal stability up to 800 degrees C. The study successfully scaled up the synthesis and applied the catalyst in diesel oxidation and Diesel Particulate Filter (DPF) for efficient CO to CO2 conversion.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Rola Mohammad Al Soubaihi, Khaled Mohammad Saoud, Myo Tay Zar Myint, Mats A. Gothelid, Joydeep Dutta
Summary: Pd supported on SiO2 aerogel catalysts show good catalytic activity for CO oxidation due to their CO bond activation capability and thermal stability. The catalyst becomes active and conversion increases after reaching the ignition temperature (T-ig). A normal hysteresis in CO oxidation has been observed, with the catalyst exhibiting high catalytic activity even at temperatures lower than T-ig.
Article
Chemistry, Physical
Bolun Yu, Denan Li, Qianqian Zhu, Shufan Yao, Lifeng Zhang, Yanshuo Li, Zhenxin Zhang
Summary: This study successfully improved the catalytic activity of a zeolitic octahedral metal oxide by incorporating a single zinc species into its micropore. The zinc incorporation achieved a high ethane conversion rate and ethylene selectivity. Mechanism study showed that the isolated zinc site played a crucial role in activating oxygen and ethane, as well as stabilizing intermediates and transition states.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Ruoqi Liu, Hao Fei, Jian Wang, Ting Guo, Fangyang Liu, Zhuangzhi Wu, Dezhi Wang
Summary: This work successfully synthesized a high-performing S-enriched MoS2 catalyst for electrocatalytic nitrogen reduction reaction (NRR), demonstrating high activity and selectivity. The synergistic effect of the 1T phase and bridging S22- species was shown to play a positive role in NRR performances, and DFT calculations revealed the mechanism behind the improved performance.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Pan Xia, Lele Zhao, Xi Chen, Zhihong Ye, Zhihong Zheng, Qiang He, Ignasi Sires
Summary: This study presents a modified gas-diffusion electrode (GDE) for highly efficient and stable H2O2 electrosynthesis by using trace polymethylhydrosiloxane (PMHS). DFT calculations provide an in-depth understanding of the roles of PMHS functional groups.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Kwangchol Ri, Songsik Pak, Dunyu Sun, Qiang Zhong, Shaogui Yang, Songil Sin, Leliang Wu, Yue Sun, Hui Cao, Chunxiao Han, Chenmin Xu, Yazi Liu, Huan He, Shiyin Li, Cheng Sun
Summary: Different B-doped rGO catalysts were synthesized and their 2e- oxygen reduction reaction (ORR) performance was investigated. It was found that the 2e- ORR selectivity of B-doped rGO was influenced by the B content and oxygen mass transfer conditions. The synthesized catalyst exhibited high 2e- ORR selectivity and was capable of degrading organic pollutants continuously.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Li Lv, Lin Lei, Qi-Wen Chen, Cheng-Li Yin, Huiqing Fan, Jian-Ping Zhou
Summary: Monoclinic phase La2Ti2O7 and orthorhombic phase Bi4Ti3O12 are widely used in photocatalysis due to their layered crystal structure. The electronic structures of these phases play a crucial role in their photocatalytic activity. Heat treatment in a nitrogen atmosphere introduces more oxygen vacancies into the S-scheme heterojunction, leading to enhanced NO removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Choe Earn Choong, Minhee Kim, Jun Sup Lim, Young June Hong, Geon Joon Lee, Keun Hwa Chae, In Wook Nah, Yeomin Yoon, Eun Ha Choi, Min Jang
Summary: In this study, the synergistic effect between argon-plasma-system (AP) and catalysts in promoting the production of reactive species for water remediation was investigated. By altering the oxygen vacancies concentration of CeO2/Bi2O3 catalyst, the production of hydrated electrons was stimulated for PFOA removal. The results showed that the built-in electric field in the Bi/Ce0.43 interface enhanced electron migration and eaq- generation, leading to improved PFOA removal efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yushan Wu, Di Xu, Yanfei Xu, Xin Tian, Mingyue Ding
Summary: Efficient synthesis of primary amines from carbonyl compounds was achieved via reductive amination using Ru@NC-Al2O3 as a catalyst, exhibiting high activity and selectivity under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Yilan Jiang, Peifang Wang, Tingyue Chen, Keyi Gao, Yiran Xiong, Yin Lu, Dionysios D. Dionysiou, Dawei Wang
Summary: By controlling the content of Co and Ni in Co1-xNixFe2O4, the production of O-1(2) from H2O2 can be regulated. NiFe2O4, with the lowest lattice distortion degree, can efficiently produce O-1(2) as the dominant reactive oxygen species. The system also exhibits significant resistance to water matrix interference.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Shuai Feng, Donglian Li, Hao Dong, Song Xie, Yaping Miao, Xuming Zhang, Biao Gao, Paul K. Chu, Xiang Peng
Summary: In this study, MoO2/Mo2N heterostructures were prepared by regulating the coordination of Mo atoms. The electrocatalyst exhibits high current density and excellent stability for hydrogen evolution reaction.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Jia-Cheng E. Yang, Min -Ping Zhu, Daqin Guan, Baoling Yuan, Darren Delai Sun, Chenghua Sun, Ming-Lai Fu
Summary: This study successfully modulated the electron configuration and spin state of millimetric metal catalysts by adjusting the support curvature radius. The electronic structure-oriented spin catalysis was found to affect the degradation of pollutants, providing new insights for the design and production of highly active, reusable, and stable catalysts.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Tao Zhong, Su Tang, Wenbin Huang, Wei Liu, Huinan Zhao, Lingling Hu, Shuanghong Tian, Chun He
Summary: In this study, a highly efficient photocatalyst for the elimination of CH3SH was developed by engineering different crystal facets and coupling them with PHI. Cu (111)/PHI exhibited the highest elimination efficiency and showed good stability and reusability. The enhanced surface electron pump effect and effective adsorption mechanisms were revealed through comprehensive characterizations and DFT calculations.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Feifei Yang, Tianyu Zhang, Jiankang Zhao, Wei Zhou, Nicole J. Libretto, Jeffrey T. Miller
Summary: A Ni3Sn intermetallic nano particle was found to have geometrically isolated Ni sites that could selectively cleave C-O bonds in biomass derivatives. This nano particle showed high activity and selectivity towards 2-methylfuran, unlike Ni nanoparticles that produced other unwanted products derived from the aromatic rings.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Lulu Qiao, Di Liu, Anquan Zhu, Jinxian Feng, Pengfei Zhou, Chunfa Liu, Kar Wei Ng, Hui Pan
Summary: This study reveals that surface evolution plays a crucial role in enhancing the electrocatalytic performance of transition metal oxides for electrochemical nitrate reduction reaction (e-NO3RR). Incorporating nickel into Co3O4 can promote surface reconstruction and improve the adsorption of intermediates and reduce energy barriers, leading to enhanced catalytic performance. The reconstructed cobalt-nickel hydroxides (CoyNi1_y(OH)2) on the catalyst's surface serve as the active phase.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Xinyu Song, Yang Shi, Zelin Wu, Bingkun Huang, Xinhao Wang, Heng Zhang, Peng Zhou, Wen Liu, Zhicheng Pan, Zhaokun Xiong, Bo Lai
Summary: This study explores the discriminative activities and mechanisms for activation of O-O bond in peroxy compounds via single-atom catalysts (SACs) with higher coordination numbers (M-N5). The atomic catalyst (Fe-SAC) with Fe-N5 as the active center was constructed, effectively activating peroxymonosulfate (PMS), peroxydisulfate (PDS), and hydrogen peroxide (H2O2). The study demonstrates the degradation efficiencies of acyclovir are related to the O-O bond length in different peroxy compounds, and reveals the discriminative mechanisms for activation of O-O bond in different Fenton-like systems.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Chemistry, Physical
Yangzhuo He, Hong Qin, Ziwei Wang, Han Wang, Yuan Zhu, Chengyun Zhou, Ying Zeng, Yicheng Li, Piao Xu, Guangming Zeng
Summary: A dual-metal-organic framework (MOF) assisted strategy was proposed to construct a magnetic Fe-Mn oxycarbide anchored on N-doped carbon for peroxymonosulfate (PMS) activation. The FeMn@NC-800 catalyst exhibited superior activity with almost 100% degradation of sulfamethazine (SMZ) in 30 minutes. The study provided insights for the rational design of high-performance heterogeneous catalysts and proposed a novel nonradical-based catalytic oxidation for environmental cleaning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)