Article
Chemistry, Physical
Elmira Pajootan, Sylvain Coulombe, Sasha Omanovic
Summary: 3D porous electrocatalysts with low platinum loading were synthesized using gas-phase pulsed laser ablation, showing higher methanol oxidation current and lower loss of active sites compared to commercial Pt/C. Increasing the electrolyte temperature significantly improved the efficiency of the electrocatalysts.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jeremy A. Bau, Magnus Rueping
Summary: In this study, the origins of CO immunity in Mo-containing H2-evolution catalysts were explored, revealing that Mo-based catalysts display remarkable immunity to CO poisoning compared to conventional catalysts like Pt or Ni. The specific property of Mo-based HER catalysts makes them ideal in environments where poisons might be present, as CO is unable to bind Mo under electrocatalytic conditions, impacting the H2-evolution reaction mechanism.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Energy & Fuels
Vi Thuy Thi Phan, Toan Minh Pham, Hau Quoc Pham, Tai Thien Huynh, Thi Hong Tham Nguyen, Van Thi Thanh Ho
Summary: This study focuses on the synthesis and application of a high-performance Pt3Co1/Ti0.9Ir0.1O2 catalyst for direct methanol fuel cells. By depositing Pt3Co1 alloy nanoparticles on a robust Ti0.9Ir0.1O2 support, the catalyst exhibits improved activity and poisoning tolerance, as well as lower cost and better stability compared to commercial Pt/C catalyst. The success of this work provides a foundation for further development of TiO2-based bimetallic catalysts in the electrochemical catalysis field.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Environmental
Aya F. Hassan, Hanafy M. Abdel Salam, Fatma Mohamed, Omayma F. Abdel-Gawad
Summary: A novel grafting polymer was synthesized by grafting itaconic acid (IA) and co-acrylamide (Am) onto sodium alginate (NaAlg) for use in direct methanol fuel cells (DMFCs). The optimization of copolymerization factors and the functionalization with polyaniline (PANI) were investigated. The grafted polymer showed exceptional electrocatalytic performance due to its unique fibrous structure, which facilitated electron transport and increased electrocatalyst porosity. This research provides a simple method for creating grafted polymer-based electrocatalysts for industrial applications in DMFCs.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Acoustics
Qingqing Lu, Xilei Gu, Jiaojiao Li, Wenpeng Li, Rafael Luque, Kamel Eid
Summary: A facile, green, and template-free approach was developed to synthesize PtPdCu porous nanodendrites (PNDs) through ultrasonication at room temperature. The as-synthesized PtPdCu PNDs exhibited high surface area, Cu content, and excellent methanol oxidation reaction (MOR) mass activity, surpassing other PtPdCu catalysts reported previously.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Physical
Fei Chen, Shiquan Guo, Shuyan Yu, Chong Zhang, Man Guo, Congju Li
Summary: The development of non-precious metal catalysts for alkaline direct methanol fuel cells (ADMFCs) is promising due to their high catalytic activity in alkaline media. A NiCo non-precious metal alloy electrocatalyst loaded on N-doped carbon nano-fibers (CNFs) was prepared using metal-organic frameworks (MOFs), which exhibited excellent methanol oxidation activity and resistance to carbon monoxide (CO) poisoning. The optimized NiCo/N-CNFs@800 catalyst showed a power density of 29.15 mW cm-2 when tested as an anode catalyst for ADMFC single cell, making it a potentially economical, efficient, and CO-resistant methanol oxidation reaction (MOR) electrocatalyst.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Taek Hyun Oh
Summary: Au-based bimetallic electrocatalysts supported on MWCNTs were investigated to improve the selectivity and activity of catalysts for DBPFCs. The study found that Au49Pd51/MWCNTs was the most suitable for the anode and Au74Ni26/MWCNTs was the most suitable for the cathode, showing good performance and stability for 70 minutes, with a maximum power density of 279.5 mW/cm(2) obtained at 52.0 +/- 2.0 degrees C. The Au-based bimetallic catalysts have potential for wide application in DBPFCs.
Article
Chemistry, Physical
Lignesh Durai, Sivagaami Sundari Gunasekaran, Sushmee Badhulika
Summary: This study reports a composite electrocatalyst consisting of glassy carbon electrode modified with nickel oxide nanospheres, biomass-derived activated carbon nanosheets, and polypyrrole nanowire for direct methanol oxidation fuel cell application. The composite electrocatalyst exhibits high catalytic activity and stability, with superior performance over other metal-oxides based electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Dilnur Kurbanjan, Xiaoxi Li, Hong Du
Summary: Efficient, durable, and highly stable non-noble metal electrocatalyst Co2P@BNC was synthesized by pyrolysis method. Co2P@BNC exhibited excellent hydrogen evolution reaction (HER) activity in acidic electrolyte with low overpotential and Tafel value. The B and N doping enhanced the electrocatalytic activity, while the N-doped C coating prevented corrosion and maintained stable catalytic activity after 10 hours of testing.
Article
Engineering, Environmental
Kousik Bhunia, Elumalai Vijayakumar, Nirmal Prashanth Maria Joseph Raj, Keyru Serbara Bejigo, Dhanasekar Kesavan, Sang -Jae Kim
Summary: The present study demonstrates the effectiveness of a noble metal-free cobalt nanoparticle-integrated nitrogen-doped carbon nanotubes catalyst for oxygen reduction reaction in Direct Methanol Fuel Cells (DMFCs). The catalyst showed superior activity and performance compared to conventional platinum catalysts. The study also showcased the applicability of the catalyst-integrated DMFC in powering portable electronics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Niloufar Jamshidi Roodbari, Sayed Reza Hosseini, Abdollah Omrani
Summary: The design of new electrocatalysts based on transition metals can lead to wide application of direct alcohol fuel cells. In this study, a hydrothermal method was used to modify graphene oxide (GO) by adding multiwalled carbon nanotubes (MWCNTs) for direct methanol fuel cells. Bimetallic and trimetallic nanohybrids based on Mn, Co, and Cu were synthesized and analyzed for their electrochemical performance towards methanol electrooxidation. The modified support material showed higher surface area and porosity compared to GO, resulting in higher current density and increased stability.
Article
Energy & Fuels
Niloufar Jamshidi Roodbari, Sayed Reza Hosseini, Abdollah Omrani
Summary: This study reports a hydrothermal method to modify graphene oxide (GO) by adding multiwalled carbon nanotubes (MWCNTs) and preparing reduced GO (rGO)MWCNT as a support material for direct methanol fuel cells. Oxid composites based on Mn, Co, and Cu were synthesized and placed on the surface of the support material through a hydrothermal method. The modified support material showed higher surface area and porosity compared to GO, increasing the amount of loading without agglomeration of metallic particles. The rGO-MWCNT/Mn-Co-Cu nanohybrid exhibited high stability and durability, making it an effective electrocatalyst for methanol electrooxidation in an alkaline medium.
Review
Chemistry, Multidisciplinary
Nedjeljko Seselj, Silvia M. M. Alfaro, Eftychia Bompolaki, Lars N. N. Cleemann, Tomas Torres, Kobra Azizi
Summary: The constant increase in global emission standards has led to the importance of fuel cell (FC) technology. Research in the past two decades has focused on developing more active catalysts for high-temperature polymer electrolyte membrane fuel cells (HT-PEMFC) and improving their durability. Two main approaches have been suggested: alloying platinum (Pt) with low-cost transition metals to reduce Pt usage, and developing novel catalyst supports to enhance metal particle anchoring and inhibit corrosion phenomena. This comprehensive review details the recent development of platinum group metal (PGM) and platinum group metal free (PGM-free) catalysts, as well as alternative carbon (C) supports for HT-PEMFCs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
M. Suha Yazici, Sumeyye Dursun, Irina Borbath, Andras Tompos
Summary: A mixed-oxide coated Ti0.8Mo0.2O2-C composite supported 20 wt% Pt electrocatalysts were developed for enhancing CO tolerance in PEMFC anode, showing better performance compared to Pt/C catalyst. Increasing Pt loading on Ti0.8Mo0.2O2-C support catalyst is proposed to overcome CO poisoning and mass transfer limitations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Qing-zhu Shu, Zhang-xun Xia, Wei Wei, Xin-long Xu, Su-li Wang, Hong Zhao, Gong-quan Sun
Summary: The gas diffusion layer (GDL) plays a crucial role in fuel cells by supporting the catalyst layer, collecting current, and transferring and redistributing materials. A novel flexible GDL made of carbon fibers and multi-wall carbon nanotubes in a polytetrafluoroethylene binder shows improved gas permeability and pore structure for enhanced mass transport and increased power densities.
NEW CARBON MATERIALS
(2021)
Article
Chemistry, Physical
Ying Ling, Farhad M. D. Kazim, Quan Zhang, Shenglin Xiao, Min Li, Zehui Yang
Summary: The rational construction of heterointerfaces to create more active sites and promote electron transfer is shown to improve the catalytic activity and stability of non-noble metal electrocatalysts for hydrogen evolution reaction. The Mo2C/W2C nano-heterostructure exhibits excellent performance in alkaline and acidic electrolytes, with low over-potentials and comparable Tafel slope to Pt/C. This work highlights the potential of efficient non-noble metal electrocatalysts for HER catalysis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Quan Zhang, Farhad M. D. Kazim, Shuangxiu Ma, Konggang Qu, Min Li, Yangang Wang, Hao Hu, Weiwei Cai, Zehui Yang
Summary: In this study, nickel nanoparticles embedded nitrogen doped carbon nanotubes were synthesized to enhance urea electro-oxidation catalytic activity by promoting reaction activity through nitrogen doping, alleviating poisoning issues, and improving efficiency.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Materials Science, Multidisciplinary
Shuyuan Pan, Shuangxiu Ma, Chaofeng Chang, Xue Long, Konggang Qu, Zehui Yang
Summary: By activating rhodium selenides and forming a rhodium selenide/carbon material heterostructure, the activity of hydrogen evolution reaction has been significantly enhanced with lower overpotentials in both acidic and alkaline electrolytes. The exceptional performance is attributed to the presence of metallic rhodium, which efficiently weakens the strong binding strength between Rh3Se4 and hydrogen ions, leading to improved charge transfer.
MATERIALS TODAY PHYSICS
(2021)
Article
Electrochemistry
Pei Leng, Fang Luo, Min Li, Shuangxiu Ma, Xue Long, Zehui Yang
Summary: In this study, a new type of Co3O4/Co(OH)2 hetero quantum dots with excellent bifunctional catalytic activity in rechargeable zinc air batteries was reported. Co3O4/Co(OH)2-HQDs have abundant oxygen defects and a low coordination environment, which is favorable for the electroadsorption of OH- species. In addition, Co3O4/Co(OH)2-HQDs exhibit good stability and high battery performance.
ELECTROCHIMICA ACTA
(2022)
Article
Nanoscience & Nanotechnology
Da Bi, Nailu Shen, Zeming Tang, Zehui Yang, Sergey A. Grigoriev, Pingting He, Qingxue Lai, Yanyu Liang
Summary: Dopant-free defective carbon electrocatalysts have been considered as promising alternatives to traditional precious metal electrocatalysts due to their lack of environmental pollution and recovery problems. However, the synthesis of dopant-free defective carbons requires complex and harsh preparation conditions, making it a challenge to construct active defects efficiently through a simple process. In this study, a dissolution-recrystallization strategy was employed to design Zn-MOF-74 precursors for the synthesis of one-dimensional porous defective carbon nanorods with high catalytic activity and molecular selectivity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Yuhua Xie, Chaofeng Chang, Fang Luo, Zehui Yang
Summary: In this work, ultrasmall Pd@Ir core-shell nanoparticles (5 nm) with atomic layer Ir (3 atomic layers) were constructed on carbon nanotubes (Pd@Ir/CNT) as a bifunctional electrocatalyst with superior oxygen evolution reaction activity and stability in acidic water splitting. The strain generated at heterointerfaces in the core-shell structure leads to an upshifted d band center of Ir atoms, resulting in a 62-fold better mass activity than commercial IrO2. In addition, the electronic hybridization suppresses the electrochemical dissolution of Ir, achieving robust stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yuhua Xie, Zehui Yang
Summary: Proton exchange membrane water splitting (PEMWS) technology has many advantages, but the development of active and stable anode electrocatalyst in acidic environment remains a challenge. Researchers have made progress in designing and synthesizing PEMWS anode electrocatalysts and optimizing their long-term stability. These advances are expected to facilitate the research and development of efficient and inexpensive PEMWS anode electrocatalysts.
Article
Chemistry, Multidisciplinary
Fang Luo, Shuyuan Pan, Yuhua Xie, Chen Li, Yingjie Yu, Haifeng Bao, Zehui Yang
Summary: This study reports an efficient and stable water splitting technology using iridium single atoms as catalysts for hydrogen evolution reaction and hydrazine oxidation reaction. Compared to traditional water splitting, this method significantly reduces the voltage required for the reactions and achieves superior stability.
Article
Chemistry, Physical
Yuhua Xie, Tiantian Xiong, Chen Li, Han Shi, Cong Zhou, Fang Luo, Zehui Yang
Summary: In this study, a robust bifunctional electrocatalyst composed of 2D Ni-organic frameworks (Ni-MOF) and nitrogen doped carbon nanotubes encapsulated Ni nanoparticles (Ni-MOF@Ni-NCNT) was developed for efficient C-N and H-O bonds dissociation. The presence of Ni-NCNT enhanced the adsorption of OH- species and weakened the binding strength with CO2, resulting in improved urea oxidation reaction performance. The alkaline hydrogen evolution reaction (HER) performance of Ni-MOF@Ni-NCNT was also enhanced due to the synergistic effect of Ni-MOF, Ni nanoparticles, and Ni-Nx-C.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yuhua Xie, Yumei Feng, Siyu Jin, Chen Li, Chunsheng Li, Yan Sun, Fang Luo, Zehui Yang
Summary: Nickel-doped iridium echinus-like nanosheets (NiIr-ENS) exhibit superior acidic oxygen evolution reaction (OER) activity, with a turnover frequency (TOF) of 1.72 s(-1) at an overpotential of 300 mV, which is 8.6 times higher than that of IrO2.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Fang Luo, Yingjie Yu, Xue Long, Chen Li, Tiantian Xiong, Zehui Yang
Summary: In this study, rhodium phosphides were used as co-catalysts with platinum to enhance the methanol oxidation reaction in direct methanol fuel cells. The excellent water dissociation capability of rhodium phosphides and the electronic interplay between platinum and rhodium phosphides were found to play important roles in improving the performance of the catalyst.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Chemistry, Multidisciplinary
Shuyuan Pan, Chaofeng Chang, Fang Luo, Zehui Yang
Summary: This study reports an efficient bifunctional electrocatalyst, rhodium telluride (RhTe2), for alkaline water splitting. The catalytic performance and stability are enhanced through the formation of Rh-Te bonds.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Fang Luo, Min Li, Zehui Yang
Summary: CoFe2O4 quantum dots exhibit a battery performance 1.79 times higher than Pt/C-IrO2 benchmark and achieve a power density of 87 mW cm(-2) in all-solid-state zinc air batteries.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xue Long, Ying Ling, Chaofeng Chang, Fang Luo, Zehui Yang
Summary: In this study, we present fluorine-doped tungsten sulfide as an outstanding electrocatalyst for H2O2 generation. The fluorine dopants enhance the catalytic efficiency by reducing the binding strength between the catalytic center and OOH* species.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jiuxiao Sun, Xue Li, Tiantian Xiong, Ying Ling, Zehui Yang
Summary: Metallic Fe nanoparticles occupy sulfur vacancies at edge sites of WS2, leading to a 4-fold increase in NRR performance due to the boosted p-d hybridization between Fe and N atoms.
CHEMICAL COMMUNICATIONS
(2022)
