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Article
Chemistry, Multidisciplinary
Yu Sun et al.
Summary: Deciphering the dynamic evolution of a catalyst's atomic and electronic structure under operating conditions is crucial for understanding its activity origin and improving catalyst design. The study revealed the dynamic reconstruction process from surface to bulk, mediated by sulfur vacancies, with partial Fe substitution enhancing HER performance. The research also uncovered the tendency of transition metals towards lower valence states in the catalytically terminated phase during the HER, highlighting the dynamic correlation between structure and activity.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Kaizhu Zeng et al.
Summary: Surface decoration and high-entropy coordination were used to enhance the catalytic performance of high-entropy alloy nanoparticles, resulting in improved activity and stability in ethanol oxidation reaction.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Environmental
Han Zhu et al.
Summary: In this study, a breakthrough in using high-entropy alloy (HEA) as substrates to stabilize active Ir at the nanoscale was reported. Fe, Co, Ni, and Ru were used as stabilizing structural elements. The FeCoNiIrRu HEA nanoparticles were synthesized in electrospun carbon nano-fibers (CNFs) and exhibited thermodynamic induced phase evolution. The FeCoNiIrRu/CNFs showed excellent oxygen evolution reaction (OER) activity with low overpotential and high mass activity. The hysteretic diffusion effect of HEA inhibited metal leaching and dissolution, leading to excellent durability. The OER performance could be optimized by changing metal compositions and calcination temperatures. In situ Raman spectra revealed the formation of intermediates on HEA NP surfaces. The redistribution of electron density in FeCoNiIrRu NPs promoted the conversion of *OOH and generation of O-2.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Wenjuan Xu et al.
Summary: A bifunctional electrocatalyst was constructed using a multi-step consequential induced strategy, with Pt-x (C)Ni-y-rGO showing high catalytic efficiency and stability for overall water splitting. By optimizing the PtNi feeding ratio, the catalyst could drive electrolytic overall water splitting at 10 mA cm(-2) with a low voltage of 1.485 V and a minimal overpotential of 37 mV for HER in 1.0 M KOH aqueous solution. Additionally, the catalyst exhibited consistent performance in both HER and OER, demonstrating its versatility for water splitting applications.
Article
Chemistry, Physical
Jacob Johny et al.
Summary: High entropy metallic glass nanoparticles synthesized by pulsed laser ablation in acetonitrile exhibit amorphous alloy phases with slight surface segregation, stabilized within graphitic shells. The incorporation of moderate amounts of Mo enhances catalytic activity, likely due to defect generation by atomic size mismatch. These carbon-coated HEMG NPs demonstrate superiority over their crystalline analogues in electrocatalytic energy conversion.
Article
Chemistry, Physical
Lalita Sharma et al.
Summary: This study utilized CFGNZ high entropy alloy (HEA) as a low-cost electrocatalyst for OER, which showed efficient and stable characteristics after activation, highlighting its tremendous potential for applications.
Article
Chemistry, Multidisciplinary
Dongshuang Wu et al.
Summary: The compositional space of high-entropy-alloy nanoparticles significantly expands the materials library. This study synthesized high-entropy-alloy nanoparticles composed of eight noble-metal-group elements and revealed their unique electronic structure. The nanoparticles exhibited lower energy level degeneracy compared to monometallic nanoparticles and showed higher intrinsic activity in hydrogen evolution reaction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Linfeng Fan et al.
Summary: In this study, a new range of high entropy alloy self-supported electrodes were experimentally prepared and exhibited good electrocatalytic performance in glycerol oxidation reaction. By studying the surface atomic configurations, the catalytic active center was identified, and a hybrid alkali/acid flow electrolytic cell was successfully developed for efficient and stable hydrogen evolution and formate production.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Lu Tao et al.
Summary: This paper proposes a low-temperature method to incorporate multiple metallic elements into a nanometer-thin ribbon, achieving the thinnest high-entropy alloy (HEA) metal material in the world. The synthetic method enables flexible control of components and concentrations in HEA nanometer ribbons, resulting in superior electrocatalytic properties.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Yuanting Lei et al.
Summary: This study successfully synthesized a novel carbon fiber-supported multi-metal sulfide nanoarray using a mild cation exchange strategy. The resulting nanoarray exhibited excellent catalytic activity and stability in alkaline medium, providing a viable synthesis route for water electrolysis.
Review
Multidisciplinary Sciences
Yonggang Yao et al.
Summary: High-entropy nanoparticles have unique structures and multielemental compositions that offer potential for tunable activity and enhanced stability, but they face challenges from complex atomic structures. The review focuses on discussing important progress in high-entropy nanoparticles and critical needs for their future development.
Article
Multidisciplinary Sciences
Jiace Hao et al.
Summary: This study overcomes the limitations of single-element catalysts by designing a high-entropy alloy system, discovering highly active sites with optimized energy barriers, and providing an in-depth understanding of the interactions between intermediates and active sites.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jican Hao et al.
Summary: A dual-single-atom catalyst composed of CuN4 and NiN4 bimetal sites was successfully synthesized and used for the electroreduction of CO2 to value-added feedstocks. The catalyst exhibited outstanding CO selectivity, high activity, and excellent durability. Additionally, the findings of this study are of great significance for the development of CO2 electroreduction catalysts.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hiroki Minamihara et al.
Summary: This study presents a new method for synthesizing ultrasmall and homogeneous high-entropy alloy nanoparticles (HEA NPs) using a continuous-flow reactor. The obtained HEA NPs exhibit remarkable catalytic activity in hydrogen evolution reaction (HER) and offer a potential platform for mass production of ultrasmall and homogeneous HEA NPs.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Jie Wei et al.
Summary: This study reveals the identification of ORR intermediates and RDSs at different active sites through Raman spectroscopy of FeN4 active sites, and the dynamic structural changes of FeN4 during ORR catalysis. It also confirms the role of two types of C-N sites in pyrolyzed Fe-N-C catalysts, showing different ORR intermediates and RDSs.
Article
Chemistry, Physical
Shiqi Wang et al.
Summary: In this study, a high entropy alloy (HEA) - FeCoNiCuPd - thin film catalyst was reported to exhibit excellent catalytic performance for both alkaline HER and OER. The remarkable HER activity originated from the multiple active sites on the FeCoNiCuPd surface, while the OER activity was attributed to the formation of highly functional (FeCoNi)-oxyhydroxide species on the film surface. The HEA thin film catalyst showed the potential for efficient water-splitting process at low cell voltage and maintained good durability.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Xianbiao Fu et al.
Summary: This study reports the discovery of a Pt-free combination, PdMoGaInNi, via computer-facilitated screening, which exhibits high HER activity and long-term durability in a proton exchange membrane water electrolyzer. The findings highlight the potential of two-dimensional high-entropy alloy (HEA) nanosheets for hydrogen production.
Article
Chemistry, Multidisciplinary
Xiangfeng Ma et al.
Summary: The addition of transition metal Fe improves the hydrogen storage properties of lightweight ZrTiVAl high-entropy alloys, leading to enhanced hydrogenation kinetics and capacities. The microstructure analysis shows that Fe substitution increases the fraction of the C14 Laves phase and reduces the HCP phase. Moreover, Fe facilitates the transfer of V element from the HCP phase to the C14 Laves phase, resulting in improved hydrogen storage capacity.
Article
Chemistry, Multidisciplinary
Rui-Qi Yao et al.
Summary: This study introduces a novel monolithic nanoporous multielemental CuAlNiMoFe electrode with a high-entropy CuNiMoFe surface as a cost-effective electrocatalyst for hydrogen evolution reaction in alkaline and neutral media. The electrode, with a surface high-entropy alloy and hierarchical nanoporous Cu scaffold, exhibits superior nonacidic HER electrocatalysis.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Chao Zhang et al.
Summary: Graphdiyne-based atomic catalysts, stabilizing metal atoms by incomplete charge transfer to resolve migration and aggregation issues, are considered the next generation catalysts. They play a significant role in understanding the structure-activity relationship and catalytic mechanism in the catalytic reaction process.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2021)
Article
Chemistry, Multidisciplinary
Jiarui Yang et al.
Summary: Catalysts designed by electronic metal-support interactions (EMSI), especially the single atomic site catalyst Rh1-TiC, show higher catalytic efficiency than Pt/C, with smaller overpotentials, lower Tafel slopes, and higher mass activities. Additionally, they demonstrate energy-saving advantages compared to Pt/C.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Guang Feng et al.
Summary: This study presents ultrasmall high-entropy alloy nanoparticles with superior performance for hydrogen evolution reaction in acidic media, surpassing the commercial Pt/C and Rh/C catalysts. The us-HEA/C demonstrated high mass activity and turnover frequency, along with excellent stability, showcasing the potential of high-entropy alloys as advanced catalysts for energy-related applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Arumugam Sivanantham et al.
Summary: This study introduces a high entropy alloy (HEA) composed of CuCoNiFeMn as an active model system for a bifunctional electrocatalyst at neutral pH, showing promising performance in neutral electrolyte. These preliminary results may open up new insights for developing nanostructured HEAs as efficient electrocatalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Miran Ha et al.
Summary: This study focuses on the utilization of single atom catalysts in the hydrogen economy, exploring their structures, stability, and activity. Some transition metal single atoms combined with N2C2 templates show excellent electrocatalytic performance.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Physical
Haolin Li et al.
Summary: The study introduces a novel catalyst design with NiO2-supported Pd nanocatalysts and investigates their HER activity and reaction mechanism through DFT calculations. By optimizing the structure with Ni atoms, the catalyst shows improved activity and efficiency for hydrogen evolution reactions.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Jun-Ye Zhang et al.
Summary: The study introduces cobalt-iron selenide nanoframes as a highly efficient electrocatalyst for water oxidation, achieving a low overpotential and outperforming most cobalt-based catalysts and even benchmarked commercial ruthenium oxides. Iron doping regulates the local spin state of cobalt species, accelerating charge transfer and formation of oxygenated intermediates, ultimately leading to enhanced oxygen evolution efficiency. This work may pioneer a promising approach in energy conversion technologies by tuning the local electronic structure to improve electrocatalysis activities.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Physical
Dan Zhang et al.
Summary: Efforts have been made to develop an efficient electrocatalyst for the hydrogen evolution reaction (HER), and PdFeCoNiCu high-entropy alloy (HEA) nanoparticles have shown excellent performance in alkaline conditions. The HEA surface optimizes electronic structures through a synergistic effect between all metals, with Pd and Co identified as the dominant electroactive sites for HER catalysis.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
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Zhe Jia et al.
ADVANCED MATERIALS
(2020)
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2020)
Review
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Yue Xin et al.
Article
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Jicheng Feng et al.
Article
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NATURE COMMUNICATIONS
(2020)
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(2019)
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Steven D. Lacey et al.
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Matthew W. Glasscott et al.
NATURE COMMUNICATIONS
(2019)
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Zeyu Jin et al.
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Pengfei Xie et al.
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(2019)
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Javier Perez-Ramirez et al.
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Yonggang Yao et al.
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Waqas Qamar Zaman et al.
ACS ENERGY LETTERS
(2017)
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Mark C. Biesinger et al.
APPLIED SURFACE SCIENCE
(2011)
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Mark C. Biesinger et al.
APPLIED SURFACE SCIENCE
(2010)
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JW Yeh et al.
ADVANCED ENGINEERING MATERIALS
(2004)
