Article
Chemistry, Physical
Mue Tang, Yujie Wang, Laizheng Luo, ShiYu Lu, Xiaoyan Liu, Jun Zhang
Summary: A durable electrocatalyst for oxygen reduction reaction (ORR) was fabricated by decorating carbon nanoparticles on a mesoporous structure of TiN hollow spheres through a hydrothermal-calcination strategy. The catalyst exhibited remarkable ORR performance in 0.1 M HClO4 electrolyte with a half-wave potential close to commercial Pt/C catalyst. It also showed high selectivity for the four-electron pathway and superior tolerance ability to methanol crossover.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yu Zhang, Luca Mascaretti, Michele Melchionna, Olivier Henrotte, Stepan Kment, Paolo Fornasiero, Alberto Naldoni
Summary: A fabrication approach was developed to create TiN/F-doped carbon hybrids with high catalytic activity for H2O2 production. These hybrids showed a maximum H2O2 selectivity of 90% and achieved a H2O2 productivity of 207 mmol g(TiN) (-1) h(-1) at 0.2 V vs RHE. The formation of nanocomposites played a key role in achieving high currents, with increased TiO x N y surface content promoting higher H(2)O(2) selectivity and fluorinated nanocarbon imparting good stability to the electrodes due to their superhydrophobic properties.
Review
Chemistry, Physical
Madiha Rafiq, Xiaozhen Hu, Zhiliang Ye, Abdul Qayum, Hong Xia, Liangsheng Hu, Fushen Lu, Paul K. Chu
Summary: Researchers summarized the importance of hexagonal boron nitride (h-BN) as a two-dimensional material in the field of green energy applications, and introduced its potential applications in energy conversion. The article discussed modification strategies to convert insulating h-BN into conductive materials and its progress and applications as an electrocatalyst.
Article
Chemistry, Physical
Qi Hua, Kenneth E. Madsen, Anne Marie Esposito, Xinyi Chen, Toby J. Woods, Richard T. Haasch, Shuting Xiang, Anatoly Frenkel, Timothy T. Fister, Andrew A. Gewirth
Summary: The oxygen reduction reaction (ORR) activity of an Fe porphyrin on different supports in acid conditions was studied. It was found that the activity varies depending on the support, with XC72 showing the highest activity and pH dependence compared to MoS2 and g-C3N4. The support-electrolyte interaction was found to control the ORR activity.
Article
Chemistry, Physical
Zeyu Yuan, Yichen Cao, Zhijie Zhang, Yanxiong Fang, Quanbing Liu, Dai Dang, Yuying Zheng
Summary: The main challenges in proton-exchange membrane fuel cells (PEMFCs) are low catalyst activity, precious metal degradation, and carbon carrier corrosion. In this study, a non-carbon material with dendritic structures was synthesized as a carrier for platinum nanoparticles, which showed excellent activity and stability for the cathode oxygen reduction reaction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Pouria Pakzad, Mehdi Mehrpooya, Fathollah Pourfayaz, Mohammad Reza Ganjali
Summary: This study investigates the electrochemical performance of Ce-PGCN,NS/Co3O4 as a metal-free ORR electrocatalyst and supercapacitor electrode. Various tests including FESEM, TEM, BET, FTIR, XRD, EDX, and Raman were conducted to characterize the synthesized electrocatalysts. The results show that Ce-PGCN,NS/Co3O4 exhibits excellent electrochemical performance as an ORR electrocatalyst and supercapacitor electrode, making it a promising alternative to commercial Pt/C catalysts. The addition of Co3O4 nanorods and doping Cerium atoms positively impact the electrocatalytic activity of g-C3N4.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Bailing Dong, Yidan Fu, Lina Han, Pengfei Zheng, Xiaoyuan Zeng, Jie Xiao, Peng Dong, Yingjie Zhang
Summary: Recently, transition metal nitrides (TMNs) have received attention as electrode materials due to their high conductivity, large surface area, electronic structure, and mechanical properties. However, their poor activity in the oxygen reduction reaction (ORR) limits their use in zinc-air batteries. This study introduces Cr ions into the lattice of titanium nitride (TiN) to regulate its d-band center and optimize its structure and performance. The resulting Ti0.95Cr0.05N/NC/C shows improved catalytic activity, stability, and durability, making it a promising candidate for zinc-air batteries.
Article
Chemistry, Physical
Girma W. Woyessa, Jay-ar B. dela Cruz, Mohammad Rameez, Chen-Hsiung Hung
Summary: A novel nanocomposite catalyst has been developed for efficient electrochemical CO2 reduction to CO, achieving high Faradaic efficiency and selectivity, which can be attributed to the intimate interface interaction between materials and higher electrochemically active surface area.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Yaping Chen, Xusheng Zheng, Jinyan Cai, Guoqiang Zhao, Bingxing Zhang, Zhouxin Luo, Gongming Wang, Hongge Pan, Wenping Sun
Summary: This study demonstrates the importance of tailoring the interfacial interaction between metal species and supports in supported electrocatalysts. By engineering a highly active interface in S-doped graphitic carbon nitride (SGCN)-supported Pt heterostructured electrocatalysts, enhanced oxygen reduction reaction (ORR) performance is achieved. The coordination and electronic structure of Pt species are modulated by S doping, resulting in strengthened Pt-N bonding and reinforcement of the metal-support interaction. The optimized 20Pt/SGCN-550 electrocatalyst exhibits excellent ORR performance and decent durability. This work not only advances the development of robust ORR electrocatalysts, but also provides a strategy for engineering heterostructured electrocatalysts with tunable interface chemistry for various catalytic applications.
Article
Chemistry, Multidisciplinary
Feifei Li, Haoqiang Ai, Shiying Shen, Jiazhong Geng, Kin Ho Lo, Hui Pan
Summary: In this study, a new 2D carbon nitride material, C4N4, with nodal-line semimetal characteristic was designed and its application as an anchor for single-atom catalysts for the oxygen reduction reaction (ORR) was investigated. The results showed that C4N4 exhibited high activity as an electrocatalyst and provided a new strategy for the design of novel catalysts.
Article
Chemistry, Multidisciplinary
Qianqian Yang, Zhiyuan Feng, Mingyue Liu, Jinxing Zhang, Hongying Zhao, Guohua Zhao
Summary: This study proposes a general strategy using photoelectrocatalysis to selectively reduce oxygen to O-1(2) with designed carbon bridged carbon nitride for degrading electron-rich organic pollutants. The synergistic photo-electro-catalytic effect plays an important role in this process, showing promising potential for application.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Ying Wang, Hongcen Yang, Niandi Lu, Di Wang, Kun Zhu, Zhixia Wang, Lianshan Mou, Yan Zhang, Yawei Zhao, Kun Tao, Fei Ma, Shanglong Peng
Summary: In this study, bimetallic doping was used to prepare 2D porous nanosheets with high selectivity for oxygen reduction reaction. The introduced metals improved the stability of hydrogen peroxide and provided a new research idea for its preparation.
Article
Chemistry, Physical
Zehao Li, Yufei Chen, Xiaoyuan Chen, Le Li, Siya Kuang, Yuxuan Guo, Yanan Wang, Jing Gao
Summary: By modifying the carbon nitride catalyst, the yield of H2O2 is significantly improved and it exhibits a wide optical response, making it suitable for artificial visible light-induced H2O2 production.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yong Li, Shuhao Bao, Hong Zhao, Bing Feng, Siyuan Chen, Tangjie Gu, Bo Yang, Biao Jiang
Summary: Phosphorus-doped activated carbon is reported as a highly selective catalyst for the dehydroaromatization of n-hexane to benzene and hydrogen. The catalytic active sites are identified as weak/medium-strength acidic centers on the catalyst surface. This work offers a new alternative for the preparation of metal-free catalysts for the selective functionalization of C-H bonds in n-alkanes.
CHEMICAL COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Lina Du, Qingyong Tian, Xiaoli Zheng, Wenjing Guo, Wei Liu, Yannan Zhou, Feng Shi, Qun Xu
Summary: By utilizing SC CO2 assistance, a surface and structural engineering strategy has been developed to achieve 2D O-doped amorphous g-C3N4 nanosheets, showing remarkable enhancement in photocatalytic performance. The introduction of 2D amorphous structure and O dopant contributes to increased surface area, abundant active sites, wider visible-light absorption range, and efficient charge separation property.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)