Review
Chemistry, Physical
Saswati Santra, Verena Streibel, Ian D. Sharp
Summary: The transition from a global economy dependent on fossil fuels to one based on sustainable energy conversion technologies is the primary challenge of the day. Earth-abundant bifunctional transition metal catalysts, especially those based on molybdenum (Mo), show great promise in reducing cost, simplifying systems, and providing prospects for accelerated scaling and sustainable material reuse. This comprehensive review focuses on recent progress in Mo-based multifunctional catalysts, discussing various formations and structures, as well as emerging trends and opportunities in this promising materials space.
Article
Chemistry, Multidisciplinary
Bo Wei, Zhongheng Fu, Dominik Legut, Timothy C. Germann, Shiyu Du, Haijun Zhang, Joseph S. Francisco, Ruifeng Zhang
Summary: Designing highly active and bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalysts with non-noble metals such as Fe/Co/Ni on MXene surfaces has shown superior performance compared to traditional unifunctional catalysts, providing a novel pathway for tunable catalytic behavior in MXenes. The electronic structure analyses revealed that the excellent catalytic activities in MXene-based DACs are attributed to the electron-capturing capability and synergistic interactions between Fe/Co/Ni adsorbents and MXene substrate. These findings not only suggest promising candidates for MXene-based bifunctional ORR/OER catalysts but also offer new theoretical insights into rationally designing noble-metal-free bifunctional DACs.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xin Ding, Run Jiang, Jialin Wu, Minghui Xing, Zelong Qiao, Xiaofei Zeng, Shitao Wang, Dapeng Cao
Summary: This study successfully synthesized the heterostructure of nickel nitride and ceria on nickel foam, showing excellent hydrogen evolution and oxygen evolution performance. Ceria plays different roles in the hydrogen evolution and oxygen evolution processes. The study reveals the different catalytic mechanisms of ceria in boosting the hydrogen evolution and oxygen evolution activities of nickel nitride, providing useful guidance for designing high-performance bifunctional catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
A. Touni, Ch Papoulia, E. Pavlidou, D. Karfaridis, D. Lambropoulou, S. Sotiropoulos
Summary: Mixed Ir-Pt electrocatalytic films were prepared on Ti metal supports via galvanic deposition, and their bifunctional electrocatalytic performance was evaluated. The results demonstrated satisfactory performance of the prepared films towards both oxygen evolution and reduction reactions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Jadranka Milikic, Sara Knezevic, Milos Ognjanovic, Dalibor Stankovic, Lazar Rakocevic, Biljana Sljukic
Summary: Porous cobalt (III) oxide (Co3O4) and mixed cobalt (III) oxide -tin oxide (Co3O4/SnO2) with spherical morphology were prepared by a novel template-based hydrothermal method. They showed excellent performance as bifunctional electrocatalysts for oxygen reduction and evolution reactions in alkaline media, comparable to the commercial Pt/C electrocatalyst. Both materials exhibited low charge transfer resistance and low onset potential for oxygen evolution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Min Jiang, Huanhuan Zhai, Libao Chen, Lin Mei, Pengfei Tan, Ke Yang, Jun Pan
Summary: A highly active bi-functional electrocatalyst of Ni2P/FeP heterostructures is constructed and demonstrates the synergistic catalytic mechanism of Ni and Fe species for overall water splitting. Ni enhances the oxygen evolution reaction (OER) performance by promoting the formation of high-valence FeOOH phase, while Ni2P/Ni(OH)2 heterojunction is identified as the high active phase for hydrogen evolution reaction (HER). This study not only develops a near-commercial bifunctional electrocatalyst, but also provides insights into the catalytic mechanism of Ni and Fe.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Bo Zhu, Jing Li, Zhanrui Hou, Chuizhou Meng, Guihua Liu, Xiaohang Du, Yuming Guan
Summary: In this study, a novel bifunctional oxygen electrocatalyst based on ZIF-67 derived trimetallic composites decorated nitrogen-doped carbon was reported, showing superior catalytic performance and stability, which has potential implications for the development of economical, powerful and stable ZABs.
Article
Energy & Fuels
Lin Hu, Quan-quan Shen, Xiao Yang, Xian-kun Wu, Rui Luo, Xiao-ju Wen, Zheng-hao Fei
Summary: In this study, a composite material derived from lignin and phytic acid was used as a high activity catalyst for solar-assisted water splitting, showing enhanced catalytic performance.
Article
Chemistry, Multidisciplinary
Yanqiang Li, Zehao Yin, Xuan Liu, Ming Cui, Siru Chen, Tingli Ma
Summary: Molybdenum carbide-based catalysts show great potential in electrochemical reactions such as the hydrogen evolution reaction and oxygen evolution reaction due to their unique electronic structure and physicochemical properties. Research has systematically summarized the synthesis strategies, structure, and catalytic performance of these catalysts, highlighting the relationships between process-structure-property and analyzing catalytic mechanisms. Existing challenges and future perspectives for further development of molybdenum carbide-based catalysts have also been discussed.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Khadim Shah, Ruoyun Dai, Muhammad Mateen, Zubair Hassan, Zewen Zhuang, Chuhao Liu, Muhammad Israr, Weng-Chon Cheong, Botao Hu, Renyong Tu, Chao Zhang, Xin Chen, Qing Peng, Chen Chen, Yadong Li
Summary: This paper presents an efficient and stable catalyst composed of a single Co atom in RuO2 sphere for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). By modifying the electronic structures of surrounding Ru atoms with a Co single atom, the electrocatalytic activities are remarkably enhanced. The catalyst exhibits ultralow overpotentials and delivers high current densities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Analytical
Mohamed Jaffer Sadiq Mohamed
Summary: Electrolyzer and fuel cell technologies are expert solutions for storing and converting renewable energy sources, with the development of efficient electrocatalysts being a significant challenge. The FeWO4/Fe3O4@NrGO nanocomposite showed superior electrocatalytic activity and stability for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) in an alkaline environment, paving the way for future energy-related applications utilizing graphene-metal tungstate-based nanocomposites.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Wei Deng, Yuping Gai, Dan Li, Zhide Chen, Wenshuo Xie, Jun Yu, Renqiang Yang, Xichang Bao, Fei Jiang
Summary: Reasonable design and synthesis of hetero atom metal coordination compounds on the atomic scale can significantly improve the performance of catalysts. For example, CoSSeNi-Pt/C can greatly enhance the hydrogen evolution reaction (HER) activity and exhibit excellent long-time durability in alkaline media.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Dongdong Wang, Yue Liu, Lili Liu, Dongfan Shan, Guixin Shen, Shanlong Peng, Heng Zhang, Xindong Wang
Summary: A three-dimensional multilevel nanoarray electrode with superaerophobicity was designed and fabricated, inspired by the underwater superaerophobicity of fish scales, to solve the bubble shielding effect in electrochemical reactions. The electrode exhibited outstanding electrocatalytic activity and durability, making it a promising catalyst for electrochemical water splitting.
Article
Chemistry, Physical
Williane da Silva Freitas, Pedro Pablo Machado Pico, Alessandra D'Epifanio, Barbara Mecheri
Summary: The study developed a highly efficient Fe-N-C bifunctional catalyst for oxygen reduction reaction and hydrogen evolution reaction, and its catalytic performance was studied in alkaline environment through cyclic voltammetry, rotating ring disk electrode experiments, and electrochemical impedance spectroscopy. Fe-N-C showed competitive performance in ORR and HER, demonstrating its activity as a bifunctional catalyst in energy conversion and storage devices.
Article
Chemistry, Multidisciplinary
Hongshuai Cao, Zhibin Li, Ying Xie, Fang Xiao, Honglei Wang, Xiaoyan Wang, Kai Pan, Andreu Cabot
Summary: A layered bifunctional electrocatalyst CoP/NF was successfully prepared in this study, showing high performance in hydrogen production through water splitting. This finding offers a cost-effective and efficient electrode material for large-scale water splitting hydrogen production.
Review
Green & Sustainable Science & Technology
Arpan Kumar Nayak, Ananta Sasmal
Summary: Recently, Perovskite oxides have been widely used in electrochemical conversion devices like Proton conducting Ceramic Fuel Cells (PCFC). Among them, barium zirconate (BaZrO3) is considered as a promising PCFC electrolyte material due to its excellent chemical stability and rapid proton diffusion. By altering the synthesis parameters and conditions, various novel synthesis techniques have been employed to prepare barium zirconate (BaZrO3) with enhanced material properties. Doping with trivalent impurities improves proton mobility and increases proton conductivity at reduced temperature, thereby expanding the scope of PCFC application with optimized output performance.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
Sunghwan Yeo, Hee Soo Yun, Jun Hwan Kim, Sungwook Mhin, HyukSu Han
Summary: This study investigates the barrier properties of Cr and chromium nitride multi-coating in nuclear cladding applications, and finds that the current waveform plays a critical role in the final performance of the coating.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Chemistry, Physical
Sun Young Jung, Kang Min Kim, Jeong Ho Ryu, Sunghwan Yeo, Hyelin Jeon, Arpan Kumar Nayak, Nguyen Thi Thu Thao, Enkhbayar Enkhtuvshin, So Jung Kim, Jin Uk Jang, Min Gi Kim, Kyeong-Han Na, Won-Youl Choi, Junghwan Bang, Seunggun Choi, Taeseup Song, Sungwook Mhin, HyukSu Han
Summary: In this study, iridium-doped hydrogenated titanate (Ir-HTO) nanobelts were reported as a promising catalyst with low iridium content for the acidic oxygen evolution reaction (OER). The addition of low iridium significantly enhanced the catalytic activity and stability of single-crystalline HTO nanobelts with exposed {100} facets. Compared to the commercial benchmark IrO2 catalyst, Ir-HTO showed a 25% reduction in overpotential for current density of 10 mA cm-2. Furthermore, Ir-HTO exhibited the highest efficiency as an electrocatalyst for the acidic OER. Improved intrinsic catalytic activity and stability of Ir-HTO were confirmed through comprehensive electrochemical characterizations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Mohammed Jalalah, HyukSu Han, Milan Mahadani, Arpan Kumar Nayak, Farid A. Harraz
Summary: The creation of energy harvesting/storage systems from biomass/waste materials offers a green and sustainable option for biomass reuse, with significant scientific and technological implications. Microstructure management is crucial for carbon-based materials to achieve the required applications in the fields of supercapacitor and conversion. In this study, a facile production method of heteroatom-doped porous carbon (HAPC) from Enhydra fluctuans leaves as electrode material for supercapacitor was demonstrated, resulting in large specific-surface area and good pore-size distribution. The solid-state symmetric supercapacitor device (SSSD) showed exceptional durability, maintaining 94% of its specific capacitance after 10,000 charge/discharge cycles.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Chemical
Mohammed Jalalah, HyukSu Han, Arpan Kumar Nayak, Farid A. Harraz
Summary: In this study, nitrogen-doped graphitized carbon-based materials with a huge specific surface area were synthesized and proved to be promising metal-free catalysts for the oxygen reduction reaction. They exhibited good activity and stability, surpassing conventional platinum-based catalysts in alkaline medium.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Nanoscience & Nanotechnology
Nguyen Thu Loan, Tran Thi Thu Huong, Minh Anh Luong, Le Van Long, HyukSu Han, Thi Dieu Thuy Ung, Nguyen Quang Liem
Summary: This paper reports the successful synthesis of AgInS2 nanocrystals double-shelled with GaS (x) and ZnS, which exhibit bright and narrow excitonic luminescence. The AgInS2/GaS (x) /ZnS NCs with a core/double-shell structure show high chemical and photochemical stability. The double-shell structure significantly enhances the luminescence quantum yield (QY) to about 60% and maintains the narrow excitonic emission for long-term storage over 12 months.
Article
Chemistry, Applied
So Jung Kim, Heechae Choi, Jeong Ho Ryu, Kang Min Kim, Sungwook Mhin, Arpan Kumar Nayak, Junghwan Bang, Minyeong Je, Ghulam Ali, Kyung Yoon Chung, Kyeong-Han Na, Won-Youl Choi, Sunghwan Yeo, Jin Uk Jang, HyukSu Han
Summary: Electrochemical water splitting for hydrogen production is a promising renewable energy-conversion technique. However, large-scale freshwater electrolysis may deplete water resources and cause water scarcity. Therefore, seawater electrolysis is considered as a potential solution for the future energy and water crisis. In this study, zinc-doped nickel iron (oxy)hydroxide nanocubes passivated by negatively charged polyanions (NFZ-PBA-S) have been developed as an effective electrocatalyst for seawater oxidation, with outstanding catalytic activity, stability, and selectivity.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Nguyen Thi Thu Thao, Kwangsoo Kim, Jeong Ho Ryu, Byeong-Seon An, Arpan Kumar Nayak, Jin Uk Jang, Kyeong-Han Na, Won-Youl Choi, Ghulam Ali, Keun Hwa Chae, Muhammad Akbar, Kyung Yoon Chung, Hyun-Seok Cho, Jong Hyeok Park, Byung-Hyun Kim, HyukSu Han
Summary: The authors find that Ir-doped calcium copper titanate (CCTO) perovskite exhibits ultrahigh mass activity for the acidic oxygen evolution reaction (OER). By substituting Ti with Ir, the metal-oxygen covalency is significantly increased, leading to a reduced energy barrier for charge transfer. CCTO, as a highly polarizable perovskite, possesses low defect formation energy for oxygen vacancy, inducing a high number of oxygen vacancies in Ir-doped CCTO (Ir-CCTO). Electron transfer occurs from the oxygen vacancies and Ti to the substituted Ir, resulting in favorable adsorptions of oxygen intermediates at Ti sites and efficient charge supplies during OER.
Article
Chemistry, Physical
Keemin Park, Seunggun Choi, Jiseok Kwon, Jaeik Kim, Seonghan Jo, Kangchun Lee, Ho Bum Park, HyukSu Han, Ungyu Paik, Taeseup Song
Summary: A strategy for enhancing the oxygen evolution reaction (OER) catalytic activity of NiFe layered double hydroxide (LDH) by incorporating CoTe nanosheets (NSs) is reported. The hybrid material (CoTe NS/NiFe LDH) exhibits a hierarchical 2D-2D heterostructure with an intact interface between the CoTe NS and NiFe LDH. The presence of CoTe NS on the NiFe LDH enhances charge transfer and reaction kinetics during the OER process, leading to lower overpotentials and excellent stability, outperforming the benchmark RuO2 catalyst.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Environmental
Sidra Jamil, Yiming Feng, Muhammad Fasehullah, Ghulam Ali, Bing Wu, Yu-Jie Guo, Bushra Jabar, Adil Mansoor, Yu-Bin Niu, Maowen Xu
Summary: This study demonstrates a stable anionic redox in Mn-rich P2-type Na0.67Mn0.8Fe0.1Mg0.1O2 by substituting Ni with Mg in the TM layer. The Mg substitution enhances the thermodynamic stability and promotes extra charge on the O atom, mitigating irreversible oxygen redox. Moreover, Mg substitution improves the reversibility of P2-O2 phase transition and Na+ diffusion kinetics.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Haseeb Ahmad, Khadija Tul Kubra, Annam Butt, Umair Nisar, Faiza Jan Iftikhar, Ghulam Ali
Summary: This article discusses the sustainable energy storage technologies of solid-state sodium batteries and the challenges they face. It proposes strategies to improve the performance of solid-state sodium batteries by studying different types of solid electrolytes. The prospects of solid electrolyte development in the future are also analyzed.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Hyuksu Han, So Jung Kim, Sun Young Jung, Dongjo Oh, Arpan Kumar Nayak, Jin Uk Jang, Junghwan Bang, Sunghwan Yeo, Tae Ho Shin
Summary: A rational catalyst design strategy based on amorphous-crystalline interfacial engineering has been developed to achieve high catalytic activity and durability for oxygen evolution reaction in different types of low-temperature water electrolyzers.
Review
Energy & Fuels
Musfique Salehin Shruti, Santimoy Khilari, E. James Jebaseelan Samuel, HyukSu Han, Arpan Kumar Nayak
Summary: In this review article, various synthesis methods including hydrothermal and solvothermal, sol-gel, spray, chemical vapor deposition (CVD), and self-assembly were used to functionalize the surface chemistry of graphene-assisted vanadium-based nanocomposites for enhanced supercapacitor applications. The use of these nanocomposite electrodes in symmetric, asymmetric, and all solid-state supercapacitor devices was briefly discussed. The review article provides concise and systematic information for the synthesis methods and supercapacitor applications of graphene-assisted vanadium-based nanocomposites.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Erbing Hua, Seunggun Choi, Siyuan Ren, Sungjun Kim, Ghulam Ali, Seon Je Kim, Woo-Sung Jang, Soyun Joo, Jingshu Zhang, Seulgi Ji, Yun Seong Cho, Joohoon Kang, Taeseup Song, Seungbum Hong, Heechae Choi, Young-Min Kim, Hyuksu Han, Sung Wng Kim
Summary: Modulating metal-support interactions (MSIs) is an effective method to improve the activity and durability of supported Pt-based nanocatalysts for the oxygen reduction reaction (ORR).
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Electrochemistry
Alia Shahid, Khadija Tul Kubra, Ghulam Ali, Rabbia Naz, Annam Butt, Fauzia Iqbal, Ayesha Salman
Summary: In this study, an anomalous quaternary hybrid material (NiMn2O4/NiWO4/NGO/PANI) is synthesized and its electrochemical performance is evaluated. The quaternary electrode exhibits remarkable specific capacitance, low impedance, and superior charge transfer performance, making it suitable for composite hybrid supercapacitor applications.
ELECTROCHIMICA ACTA
(2023)
