Article
Electrochemistry
Rui Lin, Ying Sun, Xin Cai, Tong Zheng, Xin Liu, Hong Wang, Shengchu Liu, Zhixian Hao
Summary: 3D graphene is a promising support for oxygen reduction reaction (ORR) electrocatalysts due to its better corrosion resistance and higher mechanical strength. Nitrogen-doped porous graphene (NPG) has been developed to support Pt-Ni octahedral nanoparticles (NPs), showing enhanced mass activity (MA) and durability compared to commercial Pt/C.Pt-based octahedral catalyst supported on NPG is expected to be applied to proton exchange membrane fuel cells (PEMFCs) due to its improved performance.
ELECTROCHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Zipeng Zhao, Zeyan Liu, Ao Zhang, Xingxu Yan, Wang Xue, Bosi Peng, Huolin L. Xin, Xiaoqing Pan, Xiangfeng Duan, Yu Huang
Summary: The authors report the design and development of ultrathin PtCo nanocatalysts encased in graphene nanopockets, which exhibit excellent electrochemical accessibility and durability under low loading conditions. These catalysts show promising fuel cell performance, making them ideal for reducing fuel cell costs.
NATURE NANOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Jian Wang, Guangping Wu, Wenhui Xuan, Lishan Peng, Yong Feng, Wei Ding, Li Li, Qiang Liao, Zidong Wei
Summary: A low-Pt-loading membrane electrode assembly has been developed, featuring a 3D carbon framework with embedded PtZn intermetallic nanoparticles and Nafion ionomers for efficient mass transfer and high power output in PEMFCs. The PEMFC fabricated with this assembly achieves a high Pt utilization of 145 mg(Pt) kW(-1) and excellent stability during continuous operation, representing a significant technological breakthrough for future applications.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Xiao Duan, Feng Cao, Rui Ding, Xiaoke Li, Qingbing Li, Ruziguli Aisha, Shiqiao Zhang, Kang Hua, Zhiyan Rui, Yongkang Wu, Jia Li, Aidong Li, Jianguo Liu
Summary: In this study, sub-2 nm Co-doped Pt nanoclusters with a large ECSA were synthesized, displaying improved mass activity and stability compared to commercial Pt/C. The doping technique led to enhanced performance and reduced voltage loss in high current density conditions in PEMFCs.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Ruoyu Xu, Liqun Kang, Konstantinos G. Papanikolaou, Bolun Wang, Sushila Marlow, Qian He, Peng Zhang, Jianfang Wang, Dan J. L. Brett, Michail Stamatakis, Feng Ryan Wang
Summary: This study investigates the degradation mechanism of PdPt alloys and finds that carefully designed Pt alloy structures can control surface oxygen behavior, thereby improving ORR catalytic performance and extending the lifespan of fuel cells.
JOURNAL OF CATALYSIS
(2022)
Review
Chemistry, Physical
Lei Zhao, Jianbing Zhu, Yun Zheng, Meiling Xiao, Rui Gao, Zhen Zhang, Guobin Wen, Haozhen Dou, Ya-Ping Deng, Aiping Yu, Zhenbo Wang, Zhongwei Chen
Summary: Proton exchange membrane fuel cells (PEMFCs) have been widely used in commercial markets, especially in the automotive industry. However, the durability of current electrocatalysts, which are crucial for the performance of PEMFCs, remains a significant challenge. Finding strategies to improve the lifespan of electrocatalysts is crucial for practical application in PEMFCs.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Guoyu Shi, Tetsuro Tano, Donald A. Tryk, Akihiro Iiyama, Makoto Uchida, Katsuyoshi Kakinuma
Summary: The study demonstrates that the activity of Pt/Nb-SnO2 catalyst increases with temperature and Pt loading, as the high Pt loading leads to the formation of a surface structure favorable for ORR. This enhancement is attributed to an increase in the pre-exponential factor of the Arrhenius equation, possibly linked to the increased exposure of (111)-like facets.
Article
Biochemistry & Molecular Biology
Quan Wang, Baosen Mi, Jun Zhou, Ziwei Qin, Zhuo Chen, Hongbin Wang
Summary: Hollow-structure Pt-Ni electrocatalysts were investigated as ORR catalysts and found to exhibit higher specific activity and mass activity compared to commercial Pt/C catalysts. Furthermore, they showed better stability during start-stop operation and accelerated durability tests.
Article
Chemistry, Physical
Yuxin Liu, Jing Ye, Fanpeng Kong, Chunyu Du, Pengjian Zuo, Lei Du, Geping Yin
Summary: A Pt/C-TiO2 catalyst has been developed against SO2 poisoning during ORR, showing superior performance in ORR and anti-toxicity. The accelerated removal of poisonous SO2 on Pt surfaces is achieved through the interaction between Pt and TiO2 as well as the abundant hydroxyl groups on the surface of TiO2.
Article
Engineering, Environmental
Lingfeng Li, Yandi Wen, Guokang Han, Yuxin Liu, Yajie Song, Wei Zhang, Jia Sun, Lei Du, Fanpeng Kong, Yulin Ma, Yunzhi Gao, Jiajun Wang, Chunyu Du, Geping Yin
Summary: Fe-pyridinic N-C catalysts exhibit remarkable ORR activity and outstanding stability, representing promising alternatives to platinum-based catalysts for electrochemical energy conversion devices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Analytical
Wenjuan Shi, Ah-Hyeon Park, Young-Uk Kwon
Summary: In this work, carbon-supported (Pd,Cu)@Pt core-shell nanoparticles with tunable Pt shell thickness are successfully synthesized by reacting pre-formed PdxCuy NPs with Pt(IV) ions. The catalysts exhibit enhanced catalytic activities and superior long-term durability, providing guidance for the commercialization of proton exchange membrane fuel cells.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Nivedita Shroti, Maria K. Daletou
Summary: This paper reports the facile preparation of a Pt-Co alloy supported on multi-wall carbon nanotubes. The activity towards the oxygen reduction reaction and tolerance to phosphoric acid are evaluated and compared with other electrocatalysts. The electrochemical characterization of the alloyed electrocatalyst in-situ at the cathode of a HT-PEMFC demonstrates its performance and stability potential.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Zijie Mao, Chen Ding, Xuan Liu, Qing Zhang, Xianxian Qin, Hong Li, Fan Yang, Qing Li, Xia-Guang Zhang, Junliang Zhang, Wen-Bin Cai
Summary: This study investigates the use of interstitial B-doping in the Pt lattice to design a durable and active Pt-B/C catalyst, which enhances the catalyst's activity and durability by regulating the electronic structure of surface Pt sites. Experimental results demonstrate that the synthesized Pt-B/C catalyst outperforms commercial Pt/C(com) in terms of activity and durability, showing better performance in PEMFCs.
Article
Electrochemistry
S. Yamazaki, Masafumi Asahi, Noboru Taguchi, Tsutomu Ioroi
Summary: The effects of triazines on the oxygen reduction reaction activity and durability of Pt/C were studied. Triazines dissolved in an electrolyte solution showed a strong enhancement effect, while those adsorbed on the Pt surface had a weak interaction and low enhancement effect. Triazines with amino groups significantly enhanced the durability of Pt/C by suppressing degradation and protecting vulnerable sites on Pt nanoparticles.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Lina Chong, Hua Zhou, Joseph Kubal, Qingli Tang, Jianguo Wen, Zhenzhen Yang, Ira D. Bloom, Daniel Abraham, Hong Zhu, Jianxin Zou, Wenjiang Ding
Summary: A robust catalyst consisting of PtCo nanoparticles supported on Pt-Co-N-graphene nanofiber was designed and prepared through electrospun Co metal-organic framework, aiming to improve the limited durability of Pt electrocatalysis. The catalyst exhibited an unprecedented mass activity of 2.48 A center dot mgPt(-1) and retained 80% of initial value after 60,000 accelerated stress test cycles. The modified electronic configurations of Pt and Co sites in the hybrid catalyst contributed to the high catalytic activities.
Article
Nanoscience & Nanotechnology
Tim Farrow, Nan Yang, Sandra Doria, Alex Belianinov, Stephen Jesse, Thomas M. Arruda, Giuseppe Balestrino, Sergei V. Kalinin, Amit Kumar
Article
Electrochemistry
Alexander B. Papandrew, Samuel St John, Ramez A. Elgammal, David L. Wilson, Robert W. Atkinson, Jamie S. Lawton, Thomas M. Arruda, Thomas A. Zawodzinski
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2016)
Article
Chemistry, Physical
Qingying Jia, Nagappan Ramaswamy, Urszula Tylus, Kara Strickland, Jingkun Li, Alexey Serov, Kateryna Artyushkova, Plamen Atanassov, Jacob Anibal, Cenk Gumeci, Scott Calabrese Barton, Moulay-Tahar Sougrati, Frederic Jaouen, Barr Halevi, Sanjeev Mukerjee
Article
Chemistry, Physical
Amell Alsudairi, Jingkun Li, Nagappan Ramaswamy, Sanjeev Mukerjee, K. M. Abraham, Qingying Jia
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2017)
Article
Chemistry, Physical
Nagappan Ramaswamy, Shraboni Ghoshal, Michael K. Bates, Qingying Jia, Jingkun Li, Sanjeev Mukerjee
Review
Chemistry, Multidisciplinary
Nagappan Ramaswamy, Sanjeev Mukerjee
Article
Electrochemistry
Nagappan Ramaswamy, Swami Kumaraguru, Wenbin Gu, Ratandeep Singh Kukreja, Kang Yu, Daniel Groom, Paulo Ferreira
Summary: The durability of carbon supported PtCo-alloy based nanoparticle catalysts is crucial for the longevity of proton-exchange membrane fuel cells in electric vehicle applications. Factors causing performance degradation of PtCo-based cathode catalyst layers over time include ECSA loss, specific activity loss, H+/O-2-transport changes, and Co2+ contamination effects. Accelerated stress test voltage cycling protocol compares the durability of Pt and PtCo catalysts, revealing that PtCo catalysts exhibit larger cell voltage loss at high current densities due to secondary effects of leached Co2+ cations contaminating the electrode ionomer. A 1D performance model quantifies cell voltage losses from various degradation factors of the membrane electrode assembly.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Nagappan Ramaswamy, Swami Kumaraguru, Roland Koestner, Timothy Fuller, Wenbin Gu, Nancy Kariuki, Deborah Myers, Peter J. Dudenas, Ahmet Kusoglu
Summary: This study investigates the impact of side chain length and equivalent weight of PFSA ionomers on the transport resistances of proton-exchange membrane fuel cells. It was found that decreasing EW led to higher proton conductivity and water uptake, reducing bulk-H+ and local-O-2 transport resistances in the cathode catalyst layer. A 1D-semi-empirical performance model was developed to quantify the effect of ionomer EW on cell voltage loss factors.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
R. K. Ahluwalia, X. Wang, J-K Peng, V. Konduru, S. Arisetty, N. Ramaswamy, S. Kumaraguru
Summary: To meet cost targets for automotive fuel cell systems, low-loaded Pt catalysts are needed, but they may suffer performance losses at high current densities. Key variables affecting degradation include cell voltage, humidity, and temperature, which can be controlled by adjusting FCS power, CEM turndown, and stack coolant temperature. Oversizing the stack is necessary to compensate for degradation and achieve the desired lifetime.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Nagappan Ramaswamy, Samantha Kapushy, Nathan P. Mellott, Ashley Lalonde, Roland Koestner, Frank D. Coms, Swami Kumaraguru
Summary: Precious group metal-based catalysts, such as Pt and Pt-alloys, are commonly used in fuel cell cathodes for the Oxygen Reduction Reaction (ORR). However, their activity is hindered by the adsorption of spectator species, such as sulfonate anions, which compromises the ORR performance. Recent research has shown that the use of melamine organic molecules or melamine-formaldehyde copolymeric additives can improve the ORR activity. In this study, the effectiveness of these additives in fuel cells was evaluated, and it was found that they can suppress adsorption but do not enhance the ORR activity.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Nagappan Ramaswamy, Barr Zulevi, Geoff Mccool, Natalie Patton, Zixiao Shi, Aldo Chavez, David A. Muller, Anusorn Kongkanand, Swami Kumaraguru
Summary: Proton Exchange Membrane (PEM) fuel cells are an efficient and durable electrochemical power source for heavy duty vehicles. By using higher weight percent of platinum and engineered catalyst support materials, the catalyst layer thickness can be reduced to improve performance.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Venkata Yarlagadda, Nathan Mellott, Swami Kumaraguru, Nagappan Ramaswamy
Summary: A novel Monarch carbon material with proton conduction capability was evaluated as a potential cathode catalyst support in proton exchange membrane (PEM) fuel cells. The carbon material exhibited higher water uptake and proton conductivity due to the presence of sulfone/sulfoxide/sulfonic groups on the surface. The results showed improved fuel cell performance and durability with a lower ionomer content in the electrode.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Electrochemistry
Wyndom S. Chace, Sophia M. Tiano, Thomas M. Arruda, Jamie S. Lawton
Article
Electrochemistry
Nagappan Ramaswamy, Wenbin Gu, Joseph M. Ziegelbauer, Swami Kumaraguru
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Electrochemistry
Jamie S. Lawton, Sophia M. Tiano, Daniel J. Donnelly, Sean P. Flanagan, Thomas M. Arruda
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)
