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Peng Liu et al.
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Hualong Ding et al.
Summary: In this study, a new type of non-noble metal catalyst was designed by embedding MoNi alloy nanograins into Mo-doped NiO nanosheets, forming a MoNi@Mo-NiO@NGF composite. The composite material not only exhibited excellent bifunctional electrocatalytic activity for hydrogen/oxygen evolution reactions, but also had an ultra-low hydrogen evolution overpotential under alkaline conditions. This outstanding activity and stability can be attributed to the optimized surface electronic structure of MoNi alloy by Mo doping, the synergy interface interaction between MoNi nanograins and Mo-NiO substrate, and the high conductivity and corrosion resistance of the NGF support. This study provides a new strategy for the design of high-performance catalysts for overall water splitting.
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Summary: This study demonstrates that alloying Ni with Mo significantly enhances its bifunctional hydrogen electrocatalysis performance in alkaline solution, leading to Ni4Mo alloy nanoparticles with superior hydrogen-oxidation and hydrogen-evolution activities. The experimental data are supported by theoretical simulations showing that Ni-Mo alloying weakens hydrogen adsorption, enhances hydroxyl adsorption, and reduces the reaction barrier for water formation.
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Wei Du et al.
Summary: It has been found that the Mo element in Ni4Mo alloy exhibits instability in alkaline water electrolyzer, enhancing the hydrogen evolution activity of metal Ni. Theoretical calculations and experimental results have shown that adding MoO42- to the electrolyte can repair the durability of the alloy and enhance the activity of cathodic materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
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Sengeni Anantharaj et al.
Summary: Transition metal hydroxides and their heterostructures have been identified as highly active electrocatalysts for hydrogen evolution reaction in alkaline water electrolysis. The lattice hydroxide anions in metal hydroxides enhance the catalytic activity, but their poor electronic conductivity has been a concern. Advancements in heterostructured hydroxide materials with metallic and/or semiconducting phases have overcome this limitation, making them essential for energy-efficient alkaline HER.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
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Yuyan Song et al.
Summary: This paper presents the fabrication of Ru and Ni dual-metal doped CoP porous nanofibers as high-efficiency bifunctional electrocatalysts. Dual-metal doping can efficiently modulate the electronic structure, leading to enhanced activity and stability. The Ru, Ni-CoP porous nanofibers show excellent electrocatalytic performance.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
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Sengeni Anantharaj et al.
Summary: The electrocatalytic water splitting activity trend is mainly justified by using two activity markers: double-layer capacitance (Cdl) and charge transfer resistance (Rct). However, in some cases, there is a disagreement between non-Faradaic Cdl and Faradaic catalytic activity trend, raising questions about the credibility of using non-Faradaic Cdl to justify purely Faradaic electrocatalytic activity trends.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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Jing Wang et al.
Summary: Electrocatalytic water splitting for hydrogen production is hindered by slow reaction kinetics and high-cost catalysts. Developing low-cost non-noble metal-based catalysts, particularly through heteroatom-doping to tune electronic structures, is crucial. Establishing a correlation between localized electronic structures and catalytic properties is key for advancing low-cost catalyst development.
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(2021)
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Jinzhen Huang et al.
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Kenya Kani et al.
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