Article
Chemistry, Physical
Hsiwen Wu, Fei Xiao, Jing Wang, Meng Gu, Minhua Shao
Summary: This work presents simple post-treatment methods to selectively and partially remove the Pd core of Pd-Pt core-shell catalysts. The post-treated core-shell catalyst demonstrates superior durability in oxygen reduction reaction mass activity and polarization power density retention, mitigating Pd dissolution.
Article
Chemistry, Physical
Xin Cai, Rui Lin, Xin Liu, Yichen Zhao
Summary: In this study, high-performance Pd@Pt-Ni/C catalysts were successfully prepared and applied in MEAs, showing excellent catalytic performance and stability with a high mass activity. The research also indicates that the catalyst layer prepared by the Pd@Pt-Ni/C core-shell catalyst is more conducive to oxygen transmission, making it a promising candidate for proton exchange membrane fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
Yu-Wei Cheng, Tar-Hwa Hsieh, Yu-Chang Huang, Po-Hao Tseng, Yen-Zen Wang, Ko-Shan Ho, Yue-Jie Huang
Summary: In this study, a polyazomethine gel crosslinked with Co ions was prepared from the polycondensation between p-phenylene diamine and p-terephthalaldehyde. The gel was calcined to form a Co, N-co-doped carbonaceous matrix, which acted as a cathode catalyst for an anion exchange membrane fuel cell. The Co-N-C catalyst showed a single-atom structure with active Co centers and exhibited high catalytic activity and power density.
Article
Biochemistry & Molecular Biology
Su-Jeong Bak, Sun- Kim, Su-yeong Lim, Taehyo Kim, Se-Hun Kwon, Duck Hyun Lee
Summary: The study demonstrated highly efficient oxygen reduction catalysts composed of uniform Pt nanoparticles on small, reduced graphene oxides (srGO). The catalysts exhibited efficient surface reactions, large surface areas, high metal dispersions, and excellent oxygen reduction performance. Detailed investigations suggested that the chemical functionality and electrical conductivity greatly influenced the enhanced oxygen reduction efficiency of the catalysts.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
Huiyan Feng, Yuanyan Luo, Bowen Yan, Haobo Guo, Lanqi He, Zhi Qun Tian, Panagiotis Tsiakaras, Pei Kang Shen
Summary: This study reports the synthesis of Au@PtNiAu concave octahedral core-shell nanocatalysts with solvothermal synthesis. The unique structure of the nanocatalysts, which generates a large number of step atoms, enhances the activity and stability of the oxygen reduction reaction and methanol oxidation reaction. The nanocatalysts exhibit superior performance in terms of mass activity and also show enhanced anti-toxic ability. This work provides a new strategy for the development of core-shell structure nanomaterials for electrocatalysis.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jinhui Zhu, Ziyu Fang, Xiaoxuan Yang, Mengjie Chen, Zhenying Chen, Feng Qiu, Mengjia Wang, Pan Liu, Qing Xu, Xiaodong Zhuang, Gang Wu
Summary: This article reports an effective strategy to improve the Fe site density in Fe-N-C catalysts through the design of core-shell composite precursors. The resulting core-shell structured Fe-N-C catalysts can promote the oxygen reduction reaction in thick cathodes and achieve high current densities and peak power densities in membrane electrode assemblies.
Article
Chemistry, Physical
Xin Cai, Tong Zheng, Shiyang Hua, Rui Lin
Summary: In this paper, an efficient and simple method was used to prepare high-performance Pt-Co@Pt/C core-shell catalysts, which showed higher activity and better durability in fuel cells and have the potential for practical application.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Meihua Huang, Tao Liu, Kun Hou, Feng Sun, Chuxin Wu, Lunhui Guan
Summary: This paper reports the preparation and performance study of Pt-Co alloy nanoparticles anchored on multi-walled carbon nanotubes for oxygen reduction reaction (ORR). The catalyst exhibits high activity and durability, making it a promising candidate for proton exchange membrane fuel cells (PEMFCs).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yongqiang Kang, Jiaqi Wang, Yinping Wei, Yongle Wu, Dongsheng Xia, Lin Gan
Summary: This study reveals that the performance of low platinum (Pt) alloy catalysts at high current densities is primarily controlled by the total Pt surface area. Two strategies are proposed to increase the Pt surface area, and it is found that dealloyed porous nanoparticles exhibit better performance than solid core-shell nanoparticles at medium current densities.
Article
Chemistry, Multidisciplinary
Ali Abdelhafiz, Ji Il Choi, Bote Zhao, Jinwon Cho, Yong Ding, Luke Soule, Seung Soon Jang, Meilin Liu, Faisal M. Alamgir
Summary: In the field of active catalyst design, there has been a lack of emphasis on the rational design of catalyst systems with prolonged stability. This study investigates the degradation mechanism of a catalyst system for the oxygen reduction reaction and proposes a hybrid nanoarchitecture design with extended stability.
Article
Chemistry, Physical
Shuiyun Shen, Junren Chen, Xiaohui Yan, Xiaojing Cheng, Lutian Zhao, Ziwen Ren, Lin Li, Junliang Zhang
Summary: The study reveals that the performance of non-precious metal catalysts needs to find a balance between oxygen reduction activity, proton conduction resistance, and oxygen transport resistance, requiring careful and deliberate designs for MEAs based on NPMCs.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Zhengwen Fan, Xinjiao Cui, Jiankun Wei, Chan Chen, Haolin Tang, Junsheng Li
Summary: This study proposes a method to promote the formation of Fe-N-4 active sites in Fe-N-C catalyst by enhancing the interaction between N precursors and Fe precursors. The optimized catalyst exhibits a high density of accessible Fe-N4 sites and shows excellent oxygen reduction reaction activity in both acidic and alkaline media.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Su-Jeong Bak, Mingyu Son, Jeehoon Shin, Sun- Kim, Jung Woo Lee, Duck Hyun Lee
Summary: Highly active and durable hybrid catalysts composed of small reduced graphene oxide and carbon nanotubes were prepared for oxygen reduction reaction in fuel cells. The catalysts exhibited excellent performance and stability, with the addition of carbon nanotubes further improving durability and electrical conductivity.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Ye Peng, Ja-Yeon Choi, Liliang Tian, Kyoung Bai, Yi Zhang, Dongchu Chen, Jianhuang Zeng, Dustin Banham
Summary: The distribution of platinum group metal (PGM) nanoparticle catalysts in the carbon support significantly affects the catalyst's performance. The placement of Pt either on the outer surface or within the pores of the carbon results in different activity and performance at high current densities. To gain further insight into the catalyst's properties, a relationship between Pt distribution and relative humidity (RH) tolerance is explored. This work provides valuable information for MEA designers in selecting catalysts for specific applications.
JOURNAL OF POWER SOURCES
(2022)
Review
Electrochemistry
Xiaojing Cheng, Guanghua Wei, Liuxuan Luo, Jiewei Yin, Shuiyun Shen, Junliang Zhang
Summary: This review summarizes the application and improvement of the technique of using porous solid catalysts with an ionic liquid layer (SCILL) in proton exchange membrane fuel cells. The concept, origin, outstanding electrochemical performance, and improved fuel cell performance are discussed. The effects of IL chemical structure, loading, and operating conditions are evaluated, and future directions for the development of SCILLs are proposed.
ELECTROCHEMICAL ENERGY REVIEWS
(2023)
Article
Chemistry, Physical
Jian Yang, Tianyi Wang, Xin Guo, Xiaoxue Sheng, Jiabao Li, Chengyin Wang, Guoxiu Wang
Summary: This study reports a free-standing and flexible Sb2S3/Ti3C2Tx composite film for high-capacity, fast and stable sodium storage. The hybrid nanostructure of Sb2S3 nanowires anchored between Ti3C2Tx nanosheets enables outstanding rate performance and cyclic stability in the composite anodes. The flexible sodium-ion capacitors using Sb2S3/Ti3C2Tx anodes and active carbon/reduced graphene oxide paper cathodes exhibit superior energy and power densities, as well as excellent cycling performance.
Article
Engineering, Manufacturing
Bintao Wu, Zhijun Qiu, Bosheng Dong, David Wexler, Zengxi Pan, Kristin Carpenter, Diego Raimundi Corradi, Huijun Li
Summary: In this study, the microstructure and mechanical properties of wire arc additively manufactured Ti6Al4V alloy with/ without magnetic arc oscillation were investigated. The results showed that the addition of magnetic arc oscillation resulted in refinement of the microstructure, modification of texture orientation, and improvement of mechanical properties of the deposition.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Pauline Jaumaux, Shijian Wang, Shuoqing Zhao, Bing Sun, Guoxiu Wang
Summary: In this study, N-methylformamide (NMF) was introduced as an organic solvent and its solvation structure was modulated to obtain a stable organic/aqueous hybrid electrolyte for high-voltage Zn batteries. NMF showed excellent stability against Zn metal anodes and reduced the availability of free water molecules by creating numerous hydrogen bonds, allowing for the use of high-voltage Zn||LiMn2O4 batteries. The introduction of NMF prevented hydrogen evolution reaction and promoted the formation of an F-rich solid electrolyte interphase, thereby inhibiting dendrite growth on Zn anodes. The Zn||LiMn2O4 full cells exhibited a high average Coulombic efficiency of 99.7% over 400 cycles.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Physics, Applied
Chaoyue Zhang, Junan Feng, Xin Guo, Jinqiang Zhang, Wenxue Zhang, Lixue Zhang, Jianjun Song, Guangjie Shao, Guoxiu Wang
Summary: Core-shell SiO2@Ti3C2Tx MXene hollow spheres are used as multifunctional catalysts to enhance the performance of Li-S batteries. The dual-polar and dual-physical properties of SiO2 core and MXene shell provide multiple defense lines to the shuttle effect of lithium polysulfides (LiPSs). The SiO2@MX/S electrodes exhibit high capacity, remarkable cycling stability, and low capacity decay, highlighting the significance of core-shell dual-polar structural sulfur catalysts for practical application in advanced Li-S batteries.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Zhe Bai, Zhenhua Wang, Ruilong Li, Zeyu Wu, Pingli Feng, Lina Zhao, Tan Wang, Wenshuo Hou, Yu Bai, Guoxiu Wang, Kening Sun
Summary: A triple-phase interface engineering approach using the electrically conductive layered double perovskite PrBaCo2O5+delta (PBCO) is proposed to enhance the electrocatalytic conversion of polysulfides in lithium-sulfur batteries. DFT calculations and in situ Raman spectroscopy confirm that PBCO's enhanced electrical conductivity plays a critical role in the electrocatalytic effect. PBCO-based Li-S batteries exhibit an impressive reversible capacity of 612 mAh g(-1) after 500 cycles with a capacity fading rate of 0.067% per cycle. This work reveals the mechanism of the enriched triple-phase interface approach and provides new insights for designing high-performance catalysts for Li-S batteries.
Editorial Material
Multidisciplinary Sciences
Guoxiu Wang
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
Jian Yang, Xin Guo, Hong Gao, Tianyi Wang, Zhigang Liu, Qing Yang, Hang Yao, Jiabao Li, Chengyin Wang, Guoxiu Wang
Summary: This study reports a surface and interface engineering strategy to improve the electrochemical performance of sodium-ion batteries by surface engineering of tin nanorods via N-doped carbon layers (Sn@NC). The authors demonstrate that uniform surface modification can enhance electron and sodium transport kinetics, control alloy pulverization, and form a stable organic-inorganic solid-electrolyte interface (SEI). It is also discovered that the diethylene glycol dimethyl ether electrolyte with optimized Na+ solvation structure can significantly improve reaction kinetics. Consequently, Sn@NC anodes achieve extra-long cycling stability and the full cell exhibits high energy density, excellent high-rate capability, and long cycle life over a wide temperature range.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Penghao Song, Jian Yang, Chengyin Wang, Tianyi Wang, Hong Gao, Guoxiu Wang, Jiabao Li
Summary: Heterostructure engineering combined with carbonaceous materials has shown great promise for improving the performance of transition metal sulfide electrodes in high-performance sodium storage. A specific iron sulfide-based heterostructure (Fe7S8/FeS2/NCNT) with nitrogen-doped carbon nanotubes has been prepared, which demonstrated high reversible capacity, superior rate capability, long-term cycling stability, and outstanding rate capability in different electrolytes. The outstanding performance is mainly attributed to fast sodium-ion diffusion kinetics, high capacitive contribution, and convenient interfacial dynamics.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Physical
Qihan Ding, Yuhai Dou, Yunlong Liao, Shuhan Huang, Rui Wang, Wenlu Min, Xianghong Chen, Chao Wu, Ding Yuan, Hua Kun Liu, Shi Xue Dou, Jiantie Xu
Summary: The development of high-performance solid-polymer electrolytes (SPEs) using two-dimensional inorganic nanofillers is crucial for the practical application of lithium metal batteries (LMBs). These nanofillers can interact with PEO to form a three-dimensional film with uniform Li+ distribution and vertical diffusion channels, resulting in improved conductivity and stability.
Review
Electrochemistry
Zefu Huang, Pauline Jaumaux, Bing Sun, Xin Guo, Dong Zhou, Devaraj Shanmukaraj, Michel Armand, Teofilo Rojo, Guoxiu Wang
Summary: Rechargeable room-temperature sodium-sulfur (Na-S) and sodium-selenium (Na-Se) batteries have attracted extensive attention for large-scale energy storage applications due to their low cost and high theoretical energy density. The optimization of electrode materials and investigation of mechanisms are crucial for achieving high energy density and long-term cycling stability of Na-S(Se) batteries.
ELECTROCHEMICAL ENERGY REVIEWS
(2023)
Review
Chemistry, Multidisciplinary
Jing Xu, Yashuang Qiu, Jianhao Yang, Haolin Li, Pingan Han, Yang Jin, Hao Liu, Bing Sun, Guoxiu Wang
Summary: This review comprehensively discusses the latest advances in modifying separators for high-performance sodium-sulfur/selenium/iodine batteries. The article first discusses the reaction mechanisms of each battery system, and then summarizes different separator modification strategies for regulating the shuttle effect of polysulfides/polyselenides/polyiodides, including applying electrostatic repulsive interaction, introducing conductive layers, improving sieving effects, enhancing chemisorption capability, and adding efficient electrocatalysts. Future perspectives on the practical application of modified separators in high-energy rechargeable batteries are also provided.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Ailing Song, Shenglu Song, Manman Duanmu, Hao Tian, Hao Liu, Xiujuan Qin, Guangjie Shao, Guoxiu Wang
Summary: Developing energy production, storage, and conversion technologies based on sustainable or renewable energy is crucial for addressing the energy and environmental crisis. Electrochemical water splitting is a promising approach for producing green hydrogen. The design of catalytic materials and understanding the reaction mechanisms are key focus areas for improving electrochemical hydrogen evolution reaction (HER). Recent efforts have been focused on synthesizing non-noble metallic heterostructures with synergistic effects, demonstrating high activity and stability in industrial conditions for HER.
Review
Chemistry, Multidisciplinary
Yufei Zhao, Jinqiang Zhang, Xin Guo, Xianjun Cao, Shijian Wang, Hao Liu, Guoxiu Wang
Summary: MXenes have been extensively studied for their desirable properties in energy-related applications. However, their practical use has been hindered by slow catalytic reaction kinetics and limited active sites. Surface engineering strategies, including termination engineering, defect engineering, heteroatom doping engineering, secondary material engineering, and extension to MXene analogues, have been investigated to overcome these limitations and enhance the electrocatalytic performance of MXenes. This review summarizes the progress and challenges of MXenes in electrochemical conversion reactions, and emphasizes the need for further understanding and development of MXene-based materials to meet the growing demand for sustainable energy solutions.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Yuhan Xie, Xin Chen, Kaian Sun, Jinqiang Zhang, Wei-Hong Lai, Hao Liu, Guoxiu Wang
Summary: We accelerate the kinetics of acid oxygen reduction reaction (ORR) by using a bi-functional ligand-assisted strategy to pre-control the distance of hetero-metal atoms. The synthesized Fe-Zn diatomic pairs on carbon substrates show outstanding ORR performance with an ultrahigh half-wave potential of 0.86 V vs. RHE in acid electrolyte. The specific distance range of around 3 angstrom between Fe-Zn diatomic pairs is the key to their ultrahigh activity, averaging the interaction between hetero-diatomic active sites and oxygen molecules.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Jing Xu, Haolin Li, Yang Jin, Dong Zhou, Bing Sun, Michel Armand, Guoxiu Wang
Summary: Aqueous Zn metal batteries are competitive candidates for next-generation energy storage systems due to their safety, cost-effectiveness, and environmental friendliness. However, issues like dendrite growth, hydrogen evolution, surface passivation, and slow reaction kinetics hinder their practical application. This review discusses the regulation mechanisms of electrical-related interactions on the migration, desolvation, and deposition behaviors of Zn2+ ions. It also comprehensively reviews electric field regulation strategies to enhance Zn2+ ions diffusion and uniform Zn deposition. Future research directions for electrical-related strategies in building better Zn metal batteries are offered.
ADVANCED MATERIALS
(2023)
