Article
Chemistry, Multidisciplinary
Hongbin Sheng, Hao Qu, Biao Zeng, Yanxin Li, Chenghui Xia, Can Li, Lixin Cao, Bohua Dong
Summary: The rational design of efficient and cost-effective electrocatalysts for oxygen evolution reaction (OER) is crucial for clean energy technologies. A new approach is proposed to design electrocatalysts with abundant active sites by utilizing crystalline/amorphous heterostructure. The Fe-NiCoHPi electrocatalyst with cauliflower-like structure exhibits remarkable activity and unceasing durability, making it a promising candidate for sustainable energy devices.
Article
Chemistry, Multidisciplinary
Yu Pei, David P. Wilkinson, Elod Gyenge
Summary: The authors investigated the electrochemical behavior and ORR/OER catalytic activity of core-porous shell Mn/Mn3O4 nanoparticles in comparison with other manganese dioxides (beta- and gamma-MnO2), and benchmarked against Pt/C and Pt/C-IrO2. They found that the core-shell Mn/Mn3O4 showed higher ORR and OER current density compared to the other MnO2 structures. To address the activity loss during potential cycling, they proposed an electrochemical activation method using Co(II) which resulted in superior activity and durability of the Co-incorporated Mn/Mn3O4. This study demonstrates the possibility of cost-effective ORR/OER catalysis.
Article
Chemistry, Multidisciplinary
Keying Su, Huaifang Zhang, Shiyun Qian, Jiatian Li, Jiawei Zhu, Yawen Tang, Xiaoyu Qiu
Summary: Simultaneously engineering the size and surface crystal facets of bimetallic core-shell nanocrystals can strengthen the interaction between core and shell, affecting the catalytic activity relationships.
Article
Chemistry, Physical
Libo Wu, Luo Yu, Brian McElhenny, Xinxin Xing, Dan Luo, Fanghao Zhang, Jiming Bao, Shuo Chen, Zhifeng Ren
Summary: The core-shell-structured CoPx@FeOOH catalyst designed for seawater electrolysis for hydrogen generation demonstrates excellent catalytic activity, high conductivity, large surface area, improved turnover frequency, optimal absorption energy to OER intermediates, enhanced chemical stability, and corrosion resistance. The CoPx||CoPx@FeOOH pair also shows great promise for fuel-gas production from seawater, with high Faradaic efficiency and low overpotentials required for certain current densities.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Nanoscience & Nanotechnology
Lingxia Zheng, Yujuan Zhao, Zhenyu Bao, Penghui Xu, Yi Jia, Yongzhi Wang, Pengju Yang, Xiaowei Shi, Qi Wu, Huajun Zheng
Summary: This study develops unique Mo-doped cobalt oxide nanosheet arrays as high-efficiency, low-cost electrocatalysts for electrochemical water oxidation in alkaline media. Metal doping and vacancy engineering strategies are employed to increase active sites and enhance reaction kinetics. The optimized catalyst MoCoO-3 exhibits significantly lower overpotential and superior performance compared to benchmark catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Jin-Bo Pan, Sheng Shen, Lang Chen, Chak-Tong Au, Shuang-Feng Yin
Summary: Photoelectrochemical water splitting is a promising solution for solar energy conversion and storage, but the design of efficient photoanodes faces challenges. All known photoanode materials have drawbacks, with core-shell configurations showing potential for improved activity and stability. However, the mechanism for performance improvement still needs further examination.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Environmental
Tingting Wang, Xin Li, Yajun Pang, Xiaorui Gao, Zongkui Kou, Jing Tang, John Wang
Summary: The core-shell Ni5P4@NiOOH heterostructure nanosheet arrays were designed to enhance the activation of NiOO* on surfaces, demonstrating a sharp rise in activity through the synergy between interface and oxygen vacancies (Vo) created during OER. This interface-Vo synergy resulted in an ultralow overpotential and superior OER activity compared to other counterparts.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Lisa Royer, Antoine Bonnefont, Tristan Asset, Benjamin Rotonnelli, Juan-Jesus Velasco-Velez, Steven Holdcroft, Simon Hettler, Raul Arenal, Benoit Pichon, Elena Savinova
Summary: Transition metal oxides show promise as cost-effective catalysts for oxygen evolution reaction (OER) in alkaline media. However, understanding the transformations occurring under harsh oxidative OER conditions is crucial for developing stable and active catalysts. This study used NEXAFS spectroscopy to investigate the redox transformations of core-shell Fe3O4@CoFe2O4 oxide nanoparticles over a range of potentials. The analysis revealed that the Fe3O4 core significantly influences the surface chemistry of the CoFe2O4 shell during OER, with the Co (II) structure preserved even at high potentials where Co (II) is expected to be oxidized into Co (III), while Fe (II) in the core undergoes reversible oxidation to Fe (III).
Article
Chemistry, Physical
Lin-Wei Chen, Fuxiang He, Ru-Yang Shao, Qiang-Qiang Yan, Peng Yin, Wei-Jie Zeng, Ming Zuo, Lixin He, Hai-Wei Liang
Summary: The study presents a low-Ir core-shell OER electrocatalyst with high activity in acidic media, showing a significantly improved OER performance compared to commercial Ir/C catalyst. The enhanced activity of the IrGa-IMC@IrOx catalysts is attributed to the modified electronic structure of IrOx induced by the intermetallic IrGa core, leading to improved adsorption capacity for O and OH binding and lower energy barrier for OER rate-determining steps.
Article
Chemistry, Physical
Zhaolong Wang, Hanxiang Chen, Jian Bao, Yanhua Song, Xiaojie She, Guoai Lv, Jiujun Deng, Huaming Li, Hui Xu
Summary: The development of a bifunctional electrode material with amorphous NiFeMo films grown on a conductive nickel foam substrate has significantly improved the overall water splitting performance, allowing for efficient hydrogen production to alleviate carbon emissions.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Xunxin Chen, Meishan Li, Juan Hou, Ke Lu, Xuanyu Yue, Yafei Li, Long Chen, Zhiyong Liu, Xiaodong Yang
Summary: Nitrogen-doped Ti3C2Ty MXene with multivalent cobalt and oxygen vacancy modification was prepared using a molten salt method, leading to improved electrocatalytic performance. The structural properties of MXene and the valence state of cobalt were adjusted by controlling the molten salt temperature. Electrochemical tests showed that the nitrogen-doped MXene exhibited good electrocatalytic stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Ebrahim Sadeghi, Sanaz Chamani, Emre Erdem, Naeimeh Sadat Peighambardoust, Umut Aydemir
Summary: This article presents a high-performance and durable heterostructure of NiMo/CoMoO4 for the alkaline HER, which was constructed via a two-pot in situ growth strategy on a nickel foam. The hybrid catalyst exhibited significantly increased active sites density and surface area compared to pristine CoMoO4. The heterostructure, composed of metallic NiMo and oxygen vacancy-confined CoMoO4, facilitated H and OH adsorption, resulting in low overpotential and high turnover frequency.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kun Liu, Zhuoya Zhu, Mengqi Jiang, Liangcheng Li, Linfei Ding, Meng Li, Dongmei Sun, Gaixiu Yang, Gengtao Fu, Yawen Tang
Summary: A Ce-doped Co9S8 core-shell nanoneedle array catalyst has been designed using a dual electronic and architectural engineering strategy, which accelerates the kinetics of the oxygen evolution reaction. It exhibits remarkable performance, stability, and selectivity, making it suitable for economical water electrolysis.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Engineering, Environmental
Bo Cheng, Ke Kong, Linjie Zhang, Rongjian Sa, Tengteng Gu, Yuan Rui, Ruihu Wang
Summary: In this study, ultrathin Fe-Mn-O hetero-nanosheets were fabricated through a simple chemical reaction, exhibiting lower overpotential for oxygen evolution reaction and good stability. It was also discovered that interlayer reconstruction occurred during the reaction, and the triggering effect of fl-FeOOH on electronic coupling was revealed.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Yaozhen Huang, Feng Li, Xuan Zhang, Rong Cai, Jing Chen, Jing Li, Xin Du, Zheng Wang
Summary: The electronic structure of the electrocatalyst strongly influences its performance. In this study, cuprous oxide (Cu2O) with different morphologies and copper oxide (CuO) with different surface oxidation degrees were synthesized to investigate their relationship with oxygen evolution reaction (OER) activity. It was found that Cu2O cubes with high electronic density facets exhibited enhanced OER performance, and CuO cubes with Cu vacancies showed high catalytic performance and improved charge transport.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Lei Zhang, Qi Wang, Lulu Li, Mohammad Norouzi Banis, Junjie Li, Keegan Adair, Yipeng Sun, Ruying Li, Zhi-Jian Zhao, Meng Gu, Xueliang Sun
Summary: Utilizing atomic layer deposition, Co single atoms were successfully modified on Pt catalysts, showing higher activity and stability compared to commercial Pt/C catalysts in hydrogen evolution and oxygen reduction reactions. The atomic resolution TEM images and X-ray absorption spectroscopy confirm the formation of atomically dispersed Co on Pt, impacting the electronic structure and enhancing the catalytic performance for HER and ORR. This approach provides a new pathway for designing highly active and stable Pt-based catalysts for various catalytic reactions.
Article
Chemistry, Physical
Zhongyan Wang, Chengsheng Yang, Xianghong Li, Xiwen Song, Chunlei Pei, Zhi-Jian Zhao, Jinlong Gong
Summary: This study investigates the role of CO2 dissociation on the CoCu surface during the reaction and achieves different selectivity to ethanol by using different silica supports to tune the metal-support interaction.
Article
Materials Science, Multidisciplinary
Yang Wang, Sai Chen, Jiachen Sun, Yufei Xie, Zhi-Jian Zhao, Chunlei Pei, Jinlong Gong
Summary: This paper investigates the roles of V-O sites on propane dehydrogenation (PDH) over supported monomeric VOx species. Results show that the V-O-S site plays a decisive role in PDH, while V-OH and V=O sites have minimal influence. Additionally, ZrO2 exhibits higher specific activity due to the discrepant Lewis acidity of different V-O-S sites.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jing Zhao, Peng Zhang, Tenghui Yuan, Dongfang Cheng, Shiyu Zhen, Hui Gao, Tuo Wang, Zhi-Jian Zhao, Jinlong Gong
Summary: This paper presents a controllable electrodeposition approach to alloying Cu with an oxophilic metal to steer the CO2 reduction reaction towards methane production. The optimized La5Cu95 electrocatalyst exhibits a high CH4 Faradaic efficiency of 64.5%, with a partial current density of 193.5 mA cm-2. The introduction of oxophilic La assists in lowering the energy barrier for *CO hydrogenation and promotes the formation of CH4.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Sai Chen, Ran Luo, Zhi-Jian Zhao, Chunlei Pei, Yiyi Xu, Zhenpu Lu, Chengjie Zhao, Hongbo Song, Jinlong Gong
Summary: The intensified propane dehydrogenation to propylene by chemical looping engineering on nanoscale core-shell redox catalysts achieves a propylene selectivity of 93.5% and a propylene yield of 43.6%, outperforming traditional oxidation-reduction catalysts and offering higher energy efficiency.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yiyi Xu, Sai Chen, Xin Chang, Xianhui Wang, Guodong Sun, Zhenpu Lu, Zhi-Jian Zhao, Chunlei Pei, Jinlong Gong
Summary: This paper describes the design of highly dispersed TiOx ultrathin nanosheet catalysts with high propylene formation rate and selectivity, low deactivation rate, and robust regeneration performance. The study reveals that tetracoordinated titanium atoms surrounding oxygen vacancies are the reactive sites that promote catalytic activity by activating C-H bonds and desorbing H2. This work provides insights for designing efficient oxide catalysts by constructing coordinately unsaturated metal centers in ultrathin nanosheet structures.
Article
Chemistry, Multidisciplinary
Zhongxin Song, Xuewan Wang, Dan Wu, Xian-Zhu Fu, Lei Zhang, Jing-Li Luo
Summary: An innovative strategy of coupling nitrogen-coordinated Co single atoms with Pt nanoparticles has been proposed for a superhigh power and stable catalyst in proton exchange membrane fuel cells. The catalyst shows excellent catalytic activity and durability in both the liquid half-cell and PEMFC operations, outperforming the commercial Pt/C catalyst.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Review
Chemistry, Physical
Zhongxin Song, Junjie Li, Qianling Zhang, Yongliang Li, Xiangzhong Ren, Lei Zhang, Xueliang Sun
Summary: A fuel cell is an energy conversion device that continuously releases electrical energy through electrochemical reactions. Single-atom catalysts (SACs) with 100% atom utilization efficiency have shown remarkable performance in fuel cells, saving costs. This review introduces the synthesis and application of SACs, providing experiences for the development of potential industrialized fuel cell catalysts in the future.
Article
Engineering, Chemical
Xian Yao, Xianhua Zhang, Rui Liu, Chunlei Pei, Zhi-Jian Zhao, Jinlong Gong
Summary: This paper investigates the influence of oxygen species in oxygen carriers on the reaction performance in chemical looping processes. The study finds that the predominant reaction changes from complete oxidation to partial oxidation with the increase of Ti substitution in LaNixTi1-xO3-& delta;(x = 0, 0.25, 0.5, 0.75 and 1) perovskites during chemical looping partial oxidation of methane. Experimental results indicate that moderate Ti substitution provides suitable lattice oxygen activity for methane partial oxidation, and the LaNi0.5Ti0.5O3-& delta; material exhibits high cyclic stability. This research highlights the feasibility of regulating the distribution and activity of oxygen species to tailor the reaction performance of oxygen carriers in chemical looping processes.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Ali Feizabadi, Jiatang Chen, Mohammad Norouzi Banis, Yun Mui Yiu, Lei Zhang, Xueliang Sun, Tsun-Kong Sham
Summary: In this study, surface-doped Pd@Pt nanoparticles with cobalt were used to enhance their durability and activity. The effect of the dopants on the catalytic activity of the catalysts was revealed through X-ray absorption fine structure characterization and performance tests.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Wei Wang, Sai Chen, Chunlei Pei, Ran Luo, Jiachen Sun, Hongbo Song, Guodong Sun, Xianhui Wang, Zhi-Jian Zhao, Jinlong Gong
Summary: By coupling chemical looping-selective hydrogen combustion and multifunctional catalysts, we achieved high propylene selectivity in the direct propane dehydrogenation reaction. The reaction mechanism is influenced by the proximity between the dehydrogenation and combustion sites.
Article
Chemistry, Multidisciplinary
Xin Chang, Zhenpu Lu, Xianhui Wang, Zhi-Jian Zhao, Jinlong Gong
Summary: The activation of the C-H bond in heterogeneous catalysis is crucial for converting light alkanes into higher value commodities. This study demonstrates that density functional theory (DFT) calculations can predict the C-H bond activation of propane over transition metal catalysts by analyzing the electronic environment of catalytic sites. The occupancy of the antibonding state for metal-adsorbate interaction is identified as the key factor in determining the ability to activate the C-H bond. Among various electronic features, the work function (W) shows a strong negative correlation with C-H activation energies.
Article
Chemistry, Multidisciplinary
Xiaoyun Lin, Yongtao Wang, Xin Chang, Shiyu Zhen, Zhi-Jian Zhao, Jinlong Gong
Summary: This paper proposes a simple and interpretable activity descriptor, which can be easily obtained from atomic databases, to accelerate high-throughput screening of more than 700 graphene-based single-atom catalysts. It is universal for 3-5d transition metals and C/N/P/B/O-based coordination environments. The analytical formula of this descriptor reveals the structure-activity relationship at the molecular orbital level. Experimental validation and synthesis of 4 single-atom catalysts confirm the guidance role of this descriptor in electrochemical nitrogen reduction. This work combines machine learning and physical insights, providing a new generalized strategy for low-cost high-throughput screening and comprehensive understanding of the structure-mechanism-activity relationship.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Meeting Abstract
Ophthalmology
Dominic Gonschorek, Tom Schwerd-Kleine, Jonathan Oesterle, Zhijian Zhao, Timm Schubert, Thomas Euler
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Gong Zhang, Lulu Li, Zhi-Jian Zhao, Tuo Wang, Jinlong Gong
Summary: As one of the pathways to carbon neutrality or carbon negativity, electrochemical reduction of CO2 using copper-based materials offers prospects for platform chemicals and fuel production. However, there are challenges in understanding the CO2 reduction mechanisms, designing efficient catalysts, identifying active sites, and developing practical synthesis techniques. High-performance copper-based electrocatalysts alone are not enough to meet commercialization requirements, calling for reactor design research. This Account describes research on active site identification and mass transfer enhancement in CO2 electrolysis using copper-based materials, including catalyst synthesis, mechanism investigation, and reaction system engineering, providing insights into the commercial application of this technology.
ACCOUNTS OF MATERIALS RESEARCH
(2023)
Article
Chemistry, Physical
Yifan Sun, Ye Lv, Wei Li, Jinli Zhang, Yan Fu
Summary: In this study, PtRu electrocatalysts were fabricated on carbon paper via cyclic electrodeposition for the electrocatalytic hydrogenation (ECH) of phenol. The Pt3Ru3 catalyst exhibited excellent activity and stability for the conversion of phenol to cyclohexanol at ambient temperature and various current densities. The in situ Raman spectroscopy and kinetic study revealed the hydrogenation mechanism of phenol over Pt3Ru3 in acidic electrolyte, providing an effective electrochemical strategy for the facile construction of durable electrode materials and efficient phenol hydrogenation.
JOURNAL OF CATALYSIS
(2024)
Article
Chemistry, Physical
Amir Shahzad, Khezina Rafiq, Muhammad Zeeshan Abid, Naseem Ahmad Khan, Syed Shoaib Ahmad Shah, Raed H. Althomali, Abdul Rauf, Ejaz Hussain
Summary: Photocatalytic hydrogen production through water splitting is an effective method for meeting future energy demands. In this study, researchers synthesized a 1 % Ag2S/Cu2S co-doped CdZnS catalyst and found that it can produce hydrogen at a higher rate. The co-doping of Ag2S and Cu2S in the CdZnS catalyst showed a synergistic effect, with Ag2S promoting oxidation reactions and Cu2S promoting reduction reactions.
JOURNAL OF CATALYSIS
(2024)
