An unusual network of α-MnO2 nanowires with structure-induced hydrophilicity and conductivity for improved electrocatalysis

Chen, Yingdong; Yang, Shuhua; Liu, Hongfei; Zhang, Wei; Cao, Rui

doi:10.1016/s1872-2067(21)63793-2

Cited by 17 publications

(7 citation statements)

References 47 publications

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“…21 As shown in Figure 1c,f, the contact angles of MnPi-1 and MnPi-2 electrocatalysts are similar and both are less than 90°, indicating that they have a hydrophilic surface and an excellent metal phosphate wettability. 22 The hydrophilicity of the MnPi-1 surface is enhanced, suggesting that the exposed functional groups on its surface have a higher propensity for interactions with water molecules. The two MnPi electrocatalysts have identical XRD patterns (Figure 1g), indicating that they are isomorphous compounds.…”

Section: Synthesis Ofmentioning

confidence: 99%

Effects from Surface Structures of Manganese Phosphate on Electrocatalytic Water Oxidation

Yang,

Liu,

et al. 2024

J. Phys. Chem. C

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In heterogeneous electrocatalysts, the effect of the surface structure on water oxidation is hardly fairly compared. Herein, two manganese phosphates with identical bulk structures but different surface properties are designed to form an appealing platform to investigate the effect of the surface structure on water oxidation. The uniform MnO6 site and similar physical properties avoid unfair comparisons of water oxidation performance. In situ Raman and X-ray absorption spectral results demonstrate that the flexibility of the catalyst surface structure and proton-accepting sites is favorable to water oxidation. The results from surface spectroscopic studies provide insights into evaluating the surface influencing factors of electrocatalytic water oxidation.

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Section: Synthesis Ofmentioning

confidence: 99%

Effects from Surface Structures of Manganese Phosphate on Electrocatalytic Water Oxidation

Yang,

Liu,

et al. 2024

J. Phys. Chem. C

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“…5d (OER overpotential is 450 mV at 50 mA cm −2 ). Chen et al 86 synthesized an unusual α-MnO 2 nanowire network (NWN) without any surfactants through a mild hydrothermal reaction. The α-MnO 2 NWN (Fig.…”

Section: Manganese Dioxide Based Catalysts For An Efficient Oermentioning

confidence: 99%

Recent progress of manganese dioxide based electrocatalysts for the oxygen evolution reaction

He,

Kang,

et al. 2023

Ind. Chem. Mater.

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“…Electrolytic water splitting consists of two half reactions: the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. The efficiencies of the HER and the OER are severely limited by the inevitable dynamic overpotential [ 22 , 23 ]. The OER exhibits slow reaction kinetics and requires a high overpotential due to its multiple electron transfer process, which ultimately determines the overall efficiency of water splitting [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…As a result, these materials exhibit superior performance compared to commercial Pt/C catalysts [ 37 , 38 , 39 ]. Chen et al synthesized an unusual α-MnO 2 nanowire network through a mild hydrothermal reaction without any surfactants; the unique network structure of this nanowire resulted in improved hydrophilicity and conductivity, both of which are positive factors for efficient electrocatalysts [ 22 ]. Using a novel approach of creating heterogeneous structures between two different metal sulfides, Zhang et al synthesized a highly efficient material, S-doped carbon bridged semi-crystalline MIL-based Co 3 S 4 /MnS 2 , demonstrating the potential of MOFs-assisted structural engineering to improve catalytic performance in transition metal sulfides heterostructure electrocatalysts [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Manganese-Based Materials for Electrolytic Water Splitting

Zhou

Liu

et al. 2023

IJMS

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Developing earth-abundant and highly effective electrocatalysts for electrocatalytic water splitting is a prerequisite for the upcoming hydrogen energy society. Recently, manganese-based materials have been one of the most promising candidates to replace noble metal catalysts due to their natural abundance, low cost, adjustable electronic properties, and excellent chemical stability. Although some achievements have been made in the past decades, their performance is still far lower than that of Pt. Therefore, further research is needed to improve the performance of manganese-based catalytic materials. In this review, we summarize the research progress on the application of manganese-based materials as catalysts for electrolytic water splitting. We first introduce the mechanism of electrocatalytic water decomposition using a manganese-based electrocatalyst. We then thoroughly discuss the optimization strategy used to enhance the catalytic activity of manganese-based electrocatalysts, including doping and defect engineering, interface engineering, and phase engineering. Finally, we present several future design opportunities for highly efficient manganese-based electrocatalysts.

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An unusual network of α-MnO2 nanowires with structure-induced hydrophilicity and conductivity for improved electrocatalysis

Cited by 17 publications

References 47 publications

Effects from Surface Structures of Manganese Phosphate on Electrocatalytic Water Oxidation

Effects from Surface Structures of Manganese Phosphate on Electrocatalytic Water Oxidation

Recent progress of manganese dioxide based electrocatalysts for the oxygen evolution reaction

Recent Advances in Manganese-Based Materials for Electrolytic Water Splitting

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