Steigerung der Wasseroxidation durch In‐situ‐Elektrokonversion eines Mangangallids: Ein intermetallischer Vorläuferansatz

Menezes, Prashanth W.; Walter, Carsten; Hausmann, J. Niklas; Beltrán‐Suito, Rodrigo; Schlesiger, Christopher; Praetz, Sebastian; Verchenko, Valeriy Yu.; Shevelkov, Аndrei V.; Drieß, Matthias

doi:10.1002/ange.201909904

Cited by 16 publications

(5 citation statements)

References 62 publications

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“…Thus, the low residue Cl − content will not affect the evaluation of the OER activity. The electrochemical surface areas (ECSA) are described by the surface capacitances of NH 4 MnPO 4 ⋅ H 2 O and KMnPO 4 ⋅ H 2 O with values of 7.14 and 7.45 μ F, respectively (Figure S4) [14] . In addition, the Brunner‐Emmett‐Teller (BET) surface areas of NH 4 MnPO 4 ⋅ H 2 O and KMnPO 4 ⋅ H 2 O are measured to be 4.79 and 6.41 m 2 g −1 , respectively (Figure S5).…”

Section: Resultsmentioning

confidence: 99%

Effect of Proton Transfer on Electrocatalytic Water Oxidation by Manganese Phosphates

Yang

et al. 2022

Angew Chem Int Ed

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The effect of proton transfer on water oxidation has hardly been measurably established in heterogeneous electrocatalysts. Herein, two isomorphous manganese phosphates (NH4MnPO4 ⋅ H2O and KMnPO4 ⋅ H2O) were designed to form an ideal platform to study the effect of proton transfer on water oxidation. The hydrogen‐bonding network in NH4MnPO4 ⋅ H2O has been proven to be solely responsible for its better activity. The differences of the proton transfer kinetics in the two materials indicate a fast proton hopping transfer process with a low activation energy in NH4MnPO4 ⋅ H2O. In addition, the hydrogen‐bonding network can effectively promote the proton transfer between adjacent Mn sites and further stabilize the MnIII−OH intermediates. The faster proton transfer results in a higher proportion of zeroth‐order in [H+] for OER. Thus, proton transfer‐affected electrocatalytic water oxidation has been measurably observed to bring detailed insights into the mechanism of water oxidation.

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Section: Resultsmentioning

confidence: 99%

Effect of Proton Transfer on Electrocatalytic Water Oxidation by Manganese Phosphates

Yang

et al. 2022

Angew Chem Int Ed

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“…Most metals have a certain solubility in Ga, thus Ga can be used as a metallic solvent to synthesize Ga‐based alloys. [ 19–21 ] In the oxygen‐containing environment, a protective Ga 2 O 3 layer will automatically form on the Ga surface, [ 22,23 ] and cannot be reduced by conventional reducing gases such as hydrogen unless under extreme conditions. [ 24 ] Due to the strong interaction between Ga 2 O 3 and Ga, the surface lateral diffusion rate of solute atoms is limited, [ 25 ] which hampers the layer‐by‐layer 2D growth mode of Ga‐based alloy.…”

Section: Resultsmentioning

confidence: 99%

Room‐Temperature Magnetism in 2D MnGa₄‐H Induced by Hydrogen Insertion

et al. 2023

Advanced Materials

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2D room‐temperature magnetic materials are of great importance in future spintronic devices while only very few are reported. Herein, a plasma‐enhanced chemical vapor deposition approach is exploited to construct the 2D room‐temperature magnetic MnGa4‐H single crystal with a thickness down to 2.2 nm. The employment of H2 plasma makes hydrogen atoms can be easily inserted into the MnGa4 lattice to modulate the atomic distance and charge state, thereby ferrimagnetism can be achieved without destroying the structural configuration. The as‐obtained 2D MnGa4‐H crystal is high‐quality, air‐stable, and thermo‐stable, demonstrating robust and stable room‐temperature magnetism with a high Curie temperature above 620 K. This work enriches the 2D room‐temperature magnetic family and opens up the possibility for the development of spintronic devices based on 2D magnetic alloys.

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“…However, the detailed TMBs surface reconstruction during the OER process is still ill‐characterized. Effective methodologies that could be applied to this problem are isotopic labeling and in situ techniques …”

Section: Discussionmentioning

confidence: 99%

Electrocatalysts Based on Transition Metal Borides and Borates for the Oxygen Evolution Reaction

Cui

Zhang

Zheng

et al. 2020

Chemistry A European J

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Electrochemical water splitting is a clean and sustainable process for hydrogen production on a large scale as the electrical power required can be obtained from various renewable energy resources. The key challenge in electrochemical water splitting process is to develop low‐cost electrocatalysts with high catalytic activity for the hydrogen evolution reaction (HER) on the cathode and the oxygen evolution reaction (OER) on the anode. OER is the most important half‐reaction involved in water splitting, which has been extensively studied since the last century and a large amount of electrocatalysts including noble and non‐noble metal‐based materials have been developed. Among them, transition metal borides and borates (TMBs)‐based compounds with various structures have attracted increasing attention owing to their excellent OER performance. In recent years, many efforts have been devoted to exploring the OER mechanism of TMBs and to improving the OER activity and stability of TMBs. In this review, recent research progress made in TMBs as efficient electrocatalysts for OER is summarized. The chemical properties, synthetic methodologies, catalytic performance evaluation, and improvement strategy of TMBs as OER electrocatalysts are discussed. The electrochemistry fundamentals of OER are first introduced in brief, followed by a summary of the preparation and performance of TMBs‐based OER electrocatalysts. Finally, current challenges and future directions for TMBs‐based OER electrocatalysts are discussed.

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Steigerung der Wasseroxidation durch In‐situ‐Elektrokonversion eines Mangangallids: Ein intermetallischer Vorläuferansatz

Cited by 16 publications

References 62 publications

Effect of Proton Transfer on Electrocatalytic Water Oxidation by Manganese Phosphates

Effect of Proton Transfer on Electrocatalytic Water Oxidation by Manganese Phosphates

Room‐Temperature Magnetism in 2D MnGa₄‐H Induced by Hydrogen Insertion

Electrocatalysts Based on Transition Metal Borides and Borates for the Oxygen Evolution Reaction

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Steigerung der Wasseroxidation durch In‐situ‐Elektrokonversion eines Mangangallids: Ein intermetallischer Vorläuferansatz

Cited by 16 publications

References 62 publications

Effect of Proton Transfer on Electrocatalytic Water Oxidation by Manganese Phosphates

Effect of Proton Transfer on Electrocatalytic Water Oxidation by Manganese Phosphates

Room‐Temperature Magnetism in 2D MnGa4‐H Induced by Hydrogen Insertion

Electrocatalysts Based on Transition Metal Borides and Borates for the Oxygen Evolution Reaction

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Product

Resources

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Room‐Temperature Magnetism in 2D MnGa₄‐H Induced by Hydrogen Insertion