Interface Engineering of NixSy@MnOxHy Nanorods to Efficiently Enhance Overall-Water-Splitting Activity and Stability

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: May 3, 2022

Three-dimensional (3D) core-shell heterostructured NixSy@MnOxHy nanorods grown on nickel foam (NixSy@MnOxHy/NF) were successfully fabricated via a simple hydrothermal reaction and subsequent electrodeposition process. The NixSy@MnOxHy/NF shows outstanding bifunctional activity stability for hydrogen evolution oxygen reaction, as well overall-water-splitting performance. main origins are the interface engineering of NixSy@MnOxHy, shell-protection characteristic MnOxHy, 3D open nanorod structure, which remarkably endow electrocatalyst with high stability. Exploring highly active stable transition metal-based electrocatalysts has recently attracted extensive research interests achieving inherent activity, abundant exposed sites, rapid mass transfer, strong structure overall water splitting. Herein, an coupled strategy was applied to construct three-dimensional heterostructure electrocatalyst. synthesized facile followed by X-ray absorption fine spectra reveal that Mn-S bonds connect interfaces leading electronic interaction, improves intrinsic activities (OER). Besides, efficient protective shell, MnOxHy dramatically inhibits electrochemical corrosion at current densities, enhances potentials. Furthermore, not only exposes enriched but also accelerates electrolyte diffusion bubble desorption. Therefore, exhibits exceptional splitting, low overpotentials 326 356 mV OER 100 500 mA cm-2, respectively, along 150 h cm-2. it presents cell voltage 1.529 V 10 accompanied excellent cm-2 h. This work sheds light exploring strategy.

Language: Английский

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Highly Efficient and Stable Saline Water Electrolysis Enabled by Self‐Supported Nickel‐Iron Phosphosulfide Nanotubes With Heterointerfaces and Under‐Coordinated Metal Active Sites

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(38)

Published: July 13, 2022

Abstract Direct seawater electrolysis is proposed as a potential low‐cost approach to green hydrogen production, taking advantage of the vastly available and large‐scale offshore renewable energy being deployed. However, developing efficient, earth‐abundant electrocatalysts that can survive under harsh corrosive conditions for long time still significant technical challenge. Herein, fabrication self‐supported nickel‐iron phosphosulfide (NiFeSP) nanotube array electrode through two‐step sulfurization/phosphorization reported. The as‐obtained NiFeSP nanotubes comprise abundant NiFeS/NiFeP heterointerfaces under‐coordinated metal sites, exhibiting outstanding activity durability oxygen evolution reactions (HER OER) in simulated alkaline‐seawater solution (KOH + NaCl), with an overpotential 380 (HER) 260 mV (OER) at 500 mA cm ‐2 1000 h. Theoretical calculations support observed performance, showing heterointerface sites synergistically lower barrier rate‐determining step reactions. also shows good catalytic performance urea oxidation reaction (UOR). By coupling UOR HER, bifunctional pair efficiently catalyze overall urea‐mediated alkaline‐saline water 1.938 V h without notable degradation.

Language: Английский

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Monodispersed ruthenium nanoparticles interfacially bonded with defective nitrogen-and-phosphorus-doped carbon nanosheets enable pH-universal hydrogen evolution reaction

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 306, P. 121095 - 121095

Published: Jan. 11, 2022

Language: Английский

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Surface reconstruction and charge distribution enabling Ni/W5N4 Mott-Schottky heterojunction bifunctional electrocatalyst for efficient urea-assisted water electrolysis at a large current density

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 323, P. 122168 - 122168

Published: Nov. 11, 2022

Language: Английский

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Size control and electronic manipulation of Ru catalyst over B, N co-doped carbon network for high-performance hydrogen evolution reaction

Nano Research, Journal Year: 2022, Volume and Issue: 16(5), P. 6212 - 6219

Published: Dec. 27, 2022

Language: Английский

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Dianion Induced Electron Delocalization of Trifunctional Electrocatalysts for Rechargeable Zn–Air Batteries and Self‐Powered Water Splitting

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(29)

Published: April 22, 2022

Abstract The development of low‐cost multifunctional electrocatalysts with high activity for the hydrogen evolution reaction (HER), oxygen (OER), and reduction (ORR) is critical advancement sophisticated energy conversion storage devices. Herein, a trifunctional Ni(S 0.51 Se 0.49 ) 2 @NC catalyst designed fabricated using dianionic regulation strategy. Synchrotron radiation X‐ray absorption spectroscopy density functional theory calculations reveal that simultaneous sulfidation selenization can induce electronic delocalization active sites to enhance adsorption *OOH/*OH intermediate ORR/OER H* HER. OER HER mechanisms are revealed by in situ Raman spectroscopy. exhibits catalytic (111 mV at 10 mA cm −2 ), (320 ORR (half‐wave potential 0.83 V). rechargeable zinc–air batteries (ZABs) exhibit an open‐circuit voltage 1.46 V, specific capacity 799.1 mAh g −1 , excellent stability 1000 cycles. water electrolytic cell electrodes delivers current 1.59 it be powered constructed ZABs. These findings contribute developing efficient non‐noble metal catalysts.

Language: Английский

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Unveiling the synergy of polymorph heterointerface and sulfur vacancy in NiS/Ni3S2 electrocatalyst to promote alkaline hydrogen evolution reaction

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 323, P. 122144 - 122144

Published: Nov. 11, 2022

Language: Английский

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Modulation of the interfacial charge density on Fe2P–CoP by coupling CeO2 for accelerating alkaline electrocatalytic hydrogen evolution reaction and overall water splitting

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 451, P. 138550 - 138550

Published: Aug. 9, 2022

Language: Английский

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Layered Double Hydroxide Templated Synthesis of Amorphous NiCoFeB as a Multifunctional Electrocatalyst for Overall Water Splitting and Rechargeable Zinc–Air Batteries

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 13(4)

Published: Dec. 5, 2022

Abstract Layered double hydroxides (LDHs) stand out as versatile structural platforms for modulating the electronic structure of highly reactive earth‐abundant transition metal‐based electrocatalysts hydrogen evolution reaction (HER), oxygen (OER), and reduction (ORR). Herein, a Ni‐Co‐Fe LDH, electrodeposited on Ni nanocones (NiNCs)‐decorated foam, acts morphology driving template to direct facile constant potential electrosynthesis NiCoFeB from K 2 B 4 O 7 solution. The amorphous tri‐metal borate (TMB) displays excellent trifunctional electrocatalytic activities toward HER (overpotential at 10 mA cm −2 , η = 174 mV vs RHE), OER (η 208 mV), well ORR (half‐wave 0.723 V) with low Δ E OER−ORR 770 mV, durability over 110 h in alkaline solutions. A zinc–air battery based TMB@NiNC dual catalyst cathode exhibits high open‐circuit voltage 1.477 V, power density 107 mW specific energy 918 W kg Zn −1 an outstanding cycling stability 1330 cycles which outperforms commercial noble metal benchmarks. These results demonstrate that LDHs are efficient sacrificial templates preparation high‐performance multifunctional multi‐metal energy‐related applications.

Language: Английский

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Ultrafast Room‐Temperature Synthesis of Large‐Scale, Low‐Cost, and Highly Active Ni─Fe Based Electrodes toward Industrialized Seawater Oxidation

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(39)

Published: Sept. 3, 2023

Abstract It is of significance to develop an active, efficient electrocatalyst for the oxygen evolution reaction (OER) as this determines efficiency and cost water/seawater electrolysis. Here, a cost‐effective Ni─Fe hydroxide promising OER catalyst developed by 1 min ultrafast method. The shows low overpotentials 240 254 mV at 10 mA cm −2 in both m KOH alkaline seawater, respectively. also exhibits excellent electrochemical stability. In situ Raman spectra other physical characterizations prove incorporation Fe transformation Ni(Fe)(OH) 2 Ni(Fe)OOH are responsible enhancement performance. Furthermore, can be readily scaled up synthesized within min. with size 2000 still remains electrochemically uniform. electrolysis cell integrated anode commercialized porous NiMo foam cathode has demonstrated current density 200 2.3 2.9 V 6 seawater 60 °C, Therefore, synthesized, earth‐abundant scalable, economical, highly active OER, which industrial splitting applications.

Language: Английский

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