Multiphase Ni-Fe-selenide nanosheets for highly-efficient and ultra-stable water electrolysis

Huang, Jun; Wen, Shuting; Chen, Guangliang; Chen, Wei; Wang, Guoxu; Fan, Huafeng; Chen, Dongliang; Song, Changsheng; Li, Mengchao; Wang, Xingquan; Li, Leliang; Tao, Mengping; Li, Bojia; Wang, Xinghua; Ostrikov, Kostya Ken

doi:10.1016/j.apcatb.2020.119220

Cited by 62 publications

(22 citation statements)

References 45 publications

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“…Figure 3i shows the fitting peaks of Se 3 d at 55 and 54 eV, agreeing well with the chemical states of Se 3 d 3/2 and Se 3 d 5/2 . Besides, the peak at 59 eV is signified by the Se-O bond, indicating the surface is oxidized under an ambient condition 21 , 40 . After surface reconstruction, the atomic percentage of Se decreases from 73% to 10%, but the Se-O peak increases.…”

Section: Resultsmentioning

confidence: 99%

Coordination environment tuning of nickel sites by oxyanions to optimize methanol electro-oxidation activity

et al. 2022

Nat Commun

143

104

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To achieve zero-carbon economy, advanced anode catalysts are desirable for hydrogen production and biomass upgrading powered by renewable energy. Ni-based non-precious electrocatalysts are considered as potential candidates because of intrinsic redox attributes, but in-depth understanding and rational design of Ni site coordination still remain challenging. Here, we perform anodic electrochemical oxidation of Ni-metalloids (NiPx, NiSx, and NiSex) to in-situ construct different oxyanion-coordinated amorphous nickel oxyhydroxides (NiOOH-TOx), among which NiOOH-POx shows optimal local coordination environment and boosts electrocatalytic activity of Ni sites towards selective oxidation of methanol to formate. Experiments and theoretical results demonstrate that NiOOH-POx possesses improved adsorption of OH* and methanol, and favors the formation of CH3O* intermediates. The coordinated phosphate oxyanions effectively tailor the d band center of Ni sites and increases Ni-O covalency, promoting the catalytic activity. This study provides additional insights into modulation of active-center coordination environment via oxyanions for organic molecules transformation.

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Section: Resultsmentioning

confidence: 99%

Coordination environment tuning of nickel sites by oxyanions to optimize methanol electro-oxidation activity

et al. 2022

Nat Commun

143

104

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“…Additionally, the octahedral structure, owing to the rich edges and corners, presents dense, uniformly distributed, and easily accessible active sites. Note that the effects of the hydrogen atoms adsorption sites at the edges are also confirmed for the model structures shown in Figure S36. The mixed Ni-CoP and Ni-WP 2 phases exposed on the (111) planes of NiCoWO 4 form many heterojunction interfaces, which are also critical factors to enhance the HER and OER performance of the M x O@M x P/PNCF electrocatalyst. − …”

Section: Resultsmentioning

confidence: 99%

“…The mixed Ni-CoP and Ni-WP 2 phases exposed on the (111) planes of NiCoWO 4 form many heterojunction interfaces, which are also critical factors to enhance the HER and OER performance of the M x O@M x P/PNCF electrocatalyst. − …”

Section: Resultsmentioning

confidence: 99%

Trimetallic Octahedral Ni–Co–W Phosphoxide Sprouted from Plasma-Defect-Engineered Ni–Co Support for Ultrahigh-Performance Electrocatalytic Hydrogen Evolution

Zhang

Chen

et al. 2021

ACS Sustainable Chem. Eng.

Self Cite

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The fundamental obstacle that only a few part of hydrogen energy is currently produced by industrial electrocatalysis, is in insufficient performance and high cost of even the most advanced catalysts. To meet the demand for high-performance, lasting catalysts at industry-relevant current densities (≥500 mA cm–2) with overpotentials ≤300 mV, here, we uniquely heterointerface the Ni, Co, and W phosphoxide phases in situ on plasma-defect-engineered Ni–Co support (M x O@M x P/PNCF (M = Ni, Co, W) core–shell heterostructure) to dramatically enhance the electrocatalytic performances with very high current densities. The achieved H2 evolution requires low overpotentials of only 53 and 343 mV for current densities of 10 (j 10) and 1000 mA cm–2 (j 1000) and shows fast reaction kinetics with a small Tafel slope of 40 mV dec–1. Importantly, the M x O@M x P/PNCF presents spectacular activity at industry-relevant current densities (>j 300) and outperforms the industry Pt/C benchmark. Our catalyst shows excellent long-term stability and durability with no significant activity loss after 104 cycles and 100 h of operation in an alkaline electrolyte. First-principles simulations reveal the best metal-phosphide combination to minimize the Gibbs energy for absorbing H+ ions on the reactive sites and to enhance the desorption of H2.

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“…By utilizing the aforementioned plasma‐assisted techniques, nanostructures such as porous frameworks, nano layered heterojunctions, and nanorod arrays perpendicular to the substrate have been fabricated. Huang et al have prepared metal nitrides and oxides on NiFeselenide nanosheets on the NiFe alloy foam (PNFF) by the atmospheric‐pressure DBD plasma treatment in air and the electrode higher HER and OER activity 111 . The abundant micro‐cracks on the PNFF surface after the DBD plasma treatment increase the surface area to foster subsequent reactions.…”

Section: Recent Advances Of Plasma‐modified Electrocatalystsmentioning

confidence: 99%

“…Huang et al have prepared metal nitrides and oxides on Ni Fe selenide nanosheets on the Ni Fe alloy foam (PNFF) by the atmospheric-pressure DBD plasma treatment in air and the electrode higher HER and OER activity. 111 The abundant micro-cracks on the PNFF surface after the DBD plasma treatment increase the surface area to foster subsequent reactions. In the work of Lin et al, the O 2 plasma treatment is adopted to activate metal sites on CNT-interconnected metal-organic frameworks.…”

Section: Plasma-assisted Conversionmentioning

confidence: 99%

Plasma modified and tailored defective electrocatalysts for water electrolysis and hydrogen fuel cells

Luo

Huang

et al. 2022

EcoMat

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Carbon dioxide generated by the combustion of fossil fuels exacerbates global environmental problems and hydrogen produced by renewable energy is a viable alternative in the continuous transition to sustainable and eco‐conscience development. Electrocatalysts are vital to electrocatalytic reactions and plasma surface modification is one of the promising techniques to modify nanoscale electrocatalysts for water splitting. Up to now, a comprehensive review on the latest developments, challenges, and opportunities of plasma‐tailored defective electrocatalysts for water electrolysis and hydrogen fuel cells is lacking. This paper systematically summarizes the current status of hydrogen production and fuel cell technologies, plasma principles and advantages, plasma‐tailored defective electrocatalysts from the perspective of water splitting and fuel cell applications, advanced characterization of defects, relationship between materials structure and catalytic activity of electrocatalysts, and finally challenges, opportunities, and future roadmap of plasma technologies. This review serves as a reference for future development of hydrogen technologies and offers insights into the structural tailoring of catalytic materials.

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Multiphase Ni-Fe-selenide nanosheets for highly-efficient and ultra-stable water electrolysis

Cited by 62 publications

References 45 publications

Coordination environment tuning of nickel sites by oxyanions to optimize methanol electro-oxidation activity

Coordination environment tuning of nickel sites by oxyanions to optimize methanol electro-oxidation activity

Trimetallic Octahedral Ni–Co–W Phosphoxide Sprouted from Plasma-Defect-Engineered Ni–Co Support for Ultrahigh-Performance Electrocatalytic Hydrogen Evolution

Plasma modified and tailored defective electrocatalysts for water electrolysis and hydrogen fuel cells

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