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Article
Chemistry, Physical
Chao Wang et al.
Summary: This study successfully synthesized NPCN-Pt, which consists of Pt clusters and single atoms loaded on N-doped porous carbon nanocages using ZIF-8 as a catalyst for alkaline water electrolysis. The results showed that NPCN-Pt exhibited significantly higher turnover frequency and mass activity compared to commercial Pt/C, and demonstrated better stability. Theoretical calculations indicated that Pt clusters had a lower activation energy barrier for water molecules compared to Pt single atoms, promoting the Volmer step. Furthermore, Pt single-atom sites had a smaller delta G(H*) than Pt clusters, facilitating the release of H-2. Therefore, the synergistic catalytic effect of Pt clusters and single atoms in the HER reaction provides new insights for the development of efficient HER catalysts.
Article
Chemistry, Multidisciplinary
Luan Liu et al.
Summary: This study reports on a three-component heterostructured hydrogen evolution reaction (HER) catalyst with ultra-high Pt mass activity. The catalyst consists of hollow PtCu alloy nanospheres supported on an array of WO3 on Cu foam. By utilizing the contamination from the Pt counter electrode, the authors were able to activate low-HER-activity materials, maximizing the utilization of Pt. The resulting catalyst exhibits ultrahigh Pt mass activity, outperforming commercial Pt/C catalysts and some state-of-the-art Pt-single-atom catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shu-Na Zhao et al.
Summary: This work investigates the electronic and geometric structures of Fe-N-C materials and their correlation with oxygen reduction reaction (ORR) performance. The analyses demonstrate the important role of coordinated atoms and the interaction between isolated sites and adjacent nanoparticles in enhancing ORR performance. Theoretical calculations reveal that regulating the structure of Fe-N-C sites can improve ORR performance.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Qin Yang et al.
Summary: In this study, single vacancies in a carbon matrix were purposely synthesized to trap atomic platinum and form the Pt-C-3 configuration, which exhibited exceptionally high reactivity for the hydrogen evolution reaction in both acidic and alkaline solutions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Review
Chemistry, Multidisciplinary
Gracita M. Tomboc et al.
Summary: Single-atom catalysts (SACs) have great potential in applications such as water electrolyzers and fuel cells, but their practical use is hindered by complications like atom agglomeration and relocation. This review focuses on the recent progress in SACs development and emphasizes the association between coordination environments and electrocatalytic performance.
Article
Chemistry, Physical
Tongwei Wu et al.
Summary: This study unveils the mechanism, thermodynamics, and kinetics determining the HER/NRR efficiency on the state-of-the-art NRR electrocatalyst, Ru-N-4. The results show that NRR intermediates suppress HER through coadsorption on the catalyst, and the selectivity is determined by the initial step forming *NNH or *H. This provides crucial insights into the complex NRR/HER competition and suggests ways to improve NRR selectivity.
Article
Chemistry, Multidisciplinary
Peigen Liu et al.
Summary: This study demonstrates the synergistic function between single Pd atoms and Pd nanoparticles on graphitic carbon nitride for selective photocatalytic reduction of CO2 into CH4, providing a new perspective for the development of selective photocatalytic CO2 conversion.
ADVANCED MATERIALS
(2022)
Article
Energy & Fuels
Kewei Hu et al.
Summary: This paper provides a comparative study of alkaline water electrolysis, proton exchange membrane water electrolysis and solid oxide electrolysis cells through multiphysics modeling. It analyzes their differences in various aspects and explains the reasons behind these differences.
Article
Chemistry, Physical
Chao Wang et al.
Summary: The use of ZIF-8 coating on MoP nanorods effectively limits the size and morphology of the material, resulting in N/C/MoP with good catalytic performance under alkaline conditions, low overpotential, small Tafel slope, and good stability.
Article
Chemistry, Physical
Chao Wang et al.
Summary: In this study, a self-supporting molybdenum-doped cobalt hydroxide nanosheet hierarchical microtubule structure was constructed using a structural engineering strategy to improve the active area of the catalyst. The intercalation of Mo (VI) and its connection with Co promoted the transfer of Co charges to Mo and reduced the electron cloud density of Co ions. The optimized molybdenum-doped cobalt hydroxide nanosheet microtubules exhibited significantly improved oxygen evolution activity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Shizheng Zhou et al.
Summary: In this study, a Ru cluster anchored on a trace P-doped defective TiO2 substrate (Ru/P-TiO2) was synthesized as an electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media. The Ru/P-TiO2 exhibited superior activity compared to commercial Pt/C and Ru/TiO2 materials. Experimental and theoretical studies revealed that the rutile-TiO2 crystal phase substrate with rich surface oxygen vacancies facilitated water adsorption and dissociation, while P substitution enhanced hydrogen generation by promoting hydrogen spillover, synergistically enhancing the HER activity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Amirabbas Mosallanezhad et al.
Summary: This study reveals the importance of the synergistic effect between single atoms and substrates in alkaline hydrogen evolution reaction (HER) catalysis. By anchoring platinum (Pt) single atoms on cobalt sulfide support, the catalytic performance is significantly improved. The study also elucidates that the anchored Pt single atoms enable more unhybridized d(z)(2) orbitals of surrounding cobalt sites through interfacial synergetic effect, benefiting the water dissociation kinetics. The Pt sites also act as active sites to promote subsequent H-2 formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Zhiqiang Xie et al.
Summary: In this study, a scalable hydrothermal approach was developed to fabricate MoS2-based electrodes with engineered 1T-2H heterophase and defect-rich MoS2 nanosheets, which significantly improved the mass activity and stability of the electrode. This work provides a promising direction for improving the catalytic activity, electrode conductivity, and stability in practical proton exchange membrane water electrolysis.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Zhuoli Jiang et al.
Summary: A novel Schottky catalyst, consisting of uniform ultrafine ruthenium nanoparticles supported on nitrogen-modified carbon nanosheets, displays superb hydrogen evolution reaction (HER) in alkaline conditions. The catalyst exhibits attractive activity and durability with low overpotential, and the in situ X-ray absorption fine structure measurements reveal the catalytic active site and mechanism.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Chunzhu Qian et al.
Summary: By studying the competitive coordination-pairing between Ru clusters and single-atoms, this research reveals a clicking confinement strategy for optimizing the catalytic performance of Ru-O ligand anchored on ZnFe2Ox nanosheets. The catalyst demonstrates excellent activity and stability in alkaline and seawater media, surpassing commercial Pt/C catalysts in terms of current density and mass activity.
Article
Chemistry, Multidisciplinary
Ze-Xing Cai et al.
Summary: A facile anisotropic surface modification and etching strategy is proposed for the synthesis of hollow structured ZIF-67 nanoframes. The strategy utilizes structural and compositional distinctions between crystallographic facets to selectively etch the nanoframes, resulting in high catalytic activities and stabilities in the hydrogen evolution reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Environmental
Chao Wang et al.
Summary: This study focuses on preparing catalysts with high activity and stability for ORR and HER by loading copper-platinum alloy nanoparticles on N-doped porous carbon. The C-ZIF-CuPt catalyst exhibits better ORR and HER bifunctional catalytic performance than commercial Pt/C. Cu doping increases the d-band center of Pt, reducing the overpotential and activation energy barrier, improving ORR and HER catalysis. Platinum alloying effectively enhances catalyst performance.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Jaerim Kim et al.
Summary: Efficient Ni-based thin film catalysts for the hydrogen evolution reaction in alkaline water electrolysis were studied by incorporating oxophilic transition metal atoms, showing a volcano relation between OH-binding energies and alkaline HER activities. The Cr-incorporated Ni catalyst exhibited optimized binding energies and enhanced HER activity in alkaline media. Introducing 3D Ni nanohelix arrays further improved catalytic performance by providing abundant surface active sites and effective channels for charge transfer and mass transport.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Jiawei Zhu et al.
Summary: Theoretical calculations and experimental results demonstrate that Ru/RuS2 heterostructure possesses optimized catalytic performance, especially showing extremely high activity and performance in acidic media.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Giovanni Di Liberto et al.
Summary: Recently, single atom catalysts (SACs) have played a key role in electrochemical water splitting, and a new kinetic model has been proposed to explain their activity, which differs from that of metal surfaces. SACs may form stable HM(H) intermediates, changing the kinetics of the process.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Junjie Li et al.
Summary: This study achieves high loading of Pt single atoms on carbon nanosheets through atomic layer deposition and investigates the activity of Pt single atoms and nanoparticles using operando X-ray absorption spectroscopy in the hydrogen evolution reaction and oxygen reduction reaction. The results reveal differences in the unoccupied density of states of Pt 5d orbitals between Pt single atoms and nanoparticles, as well as the formation of a stable Pt oxide during ORR on the Pt-1/NCNS catalyst.
Article
Chemistry, Multidisciplinary
Panyong Kuang et al.
Summary: This study demonstrates the tailoring of the electronic structure of Pt single atoms supported on N-doped mesoporous hollow carbon spheres through strong EMSI engineering, leading to the Pt-1/NMHCS composite exhibiting higher activity and stability in catalyzing the electrocatalytic hydrogen evolution reaction compared to Pt-NP and commercial Pt/C. The strong EMSI effect in a unique N-1-Pt-1-C-2 coordination structure significantly modifies the electronic structure of Pt 5d states, enhancing the reduction of adsorbed proton and facilitating H-H coupling for Pt-like HER activity.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yihui Zhu et al.
Summary: By computational studies, atomic step-rich Pt clusters and defective graphene (DG)-loaded Pt SAs are found to be beneficial for water dissociation and hydrogen coupling, respectively. The structure that integrates both Pt SAs and nanoclusters onto the DG matrix (PtSA/NC-DG) is predicted to exhibit decent activity and high atomic utilization for alkaline HER electrocatalysis.
Article
Nanoscience & Nanotechnology
Wei Wu et al.
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Multidisciplinary Sciences
Shi Fang et al.
NATURE COMMUNICATIONS
(2020)
Article
Multidisciplinary Sciences
Long Kuai et al.
NATURE COMMUNICATIONS
(2020)
Article
Chemistry, Physical
Dan Li et al.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Nanoscience & Nanotechnology
Chao Wang et al.
ACS APPLIED NANO MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Yunteng Qu et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Review
Electrochemistry
Haneul Jin et al.
Article
Multidisciplinary Sciences
Hengwei Wang et al.
NATURE COMMUNICATIONS
(2019)
Article
Chemistry, Physical
Wang Li et al.
APPLIED SURFACE SCIENCE
(2019)
Article
Multidisciplinary Sciences
Huabin Zhang et al.
Article
Energy & Fuels
Jitendra N. Tiwari et al.
