Engineering Multilevel Collaborative Catalytic Interfaces with Multifunctional Iron Sites Enabling High-Performance Real Seawater Splitting

ACS Nano, Год журнала: 2023, Номер 17(2), С. 1681 - 1692

Опубликована: Янв. 3, 2023

Given the abundant reserves of seawater and scarcity freshwater, real electrolysis is a more economically appealing technology for hydrogen production relative to orthodox freshwater electrolysis. However, this greatly precluded by undesirable chlorine oxidation reaction severe chloride corrosion at anode, further restricting catalytic efficiency overall splitting. Herein, feasible strategy engineering multifunctional collaborative interfaces reported develop porous metal nitride/phosphide heterostructure arrays anchoring on conductive Ni2P surfaces with affluent iron sites. Collaborative among phosphide, bimetallic nitride, supports play positive role in improving water adsorption/dissociation adsorption behaviors active Fe sites evidenced theoretical calculations evolution reactions, enhancing oxygenated species nitrate-rich passivating layers resistant oxygen reaction, thus cooperatively propelling high-performance bifunctional The resultant material Fe2P/Ni1.5Co1.5N/Ni2P performs excellently as self-standing catalyst alkaline It requires extremely low cell voltages 1.624 1.742 V afford current densities 100 500 mA/cm2 1 M KOH electrolytes, respectively, along superior long-term stability, outperforming nearly all ever-reported non-noble electrocatalysts benchmark Pt/IrO2 coupled electrodes freshwater/seawater This work presents an effective catalysts toward green from

Язык: Английский

---

Bimetallic Phosphide Heterostructure Coupled with Ultrathin Carbon Layer Boosting Overall Alkaline Water and Seawater Splitting

Small, Год журнала: 2023, Номер 19(20)

Опубликована: Фев. 15, 2023

Seawater electrolysis is promising for green hydrogen production but hindered by the sluggish reaction kinetics of both cathode and anode, as well detrimental chlorine chemistry environment. Herein, a self-supported bimetallic phosphide heterostructure electrode strongly coupled with an ultrathin carbon layer on Fe foam (C@CoP-FeP/FF) constructed. When used oxygen evolution reactions (HER/OER) in simulated seawater, C@CoP-FeP/FF shows overpotentials 192 mV 297 at 100 mA cm-2 , respectively. Moreover, enables overall seawater splitting cell voltage 1.73 V to achieve operate stably during h. The superior water properties can be ascribed integrated architecture CoP-FeP heterostructure, protective layer, porous current collector. unique composites not only provide enriched active sites, ensure prominent intrinsic activity, also accelerate electron transfer mass diffusion. This work confirms feasibility integration strategy manufacturing bifunctional splitting.

Язык: Английский

---

Engineering Active Iron Sites on Nanoporous Bimetal Phosphide/Nitride Heterostructure Array Enabling Robust Overall Water Splitting

Advanced Functional Materials, Год журнала: 2022, Номер 33(6)

Опубликована: Дек. 20, 2022

Abstract Alkaline water electrolysis is a commercially viable technology for green H 2 production using renewable electricity from intermittent solar or wind energy, but very few non‐noble bifunctional catalysts simultaneously exhibit superb catalytic efficiency and stability at large current densities hydrogen oxygen evolution reactions (HER OER, respectively), especially iron‐based catalysts. Given that iron the most abundant least expensive transition metal, compounds are attractive low‐cost targets as active electrocatalysts splitting with large‐current durability. Herein, in situ construction of self‐supported Fe P/Co N porous heterostructure arrays possessing activity base reported, featured by low overpotentials 131 283 mV to attain density 500 mA cm −2 HER respectively, outperforming reported hitherto. Particularly, this hybrid catalyst also displays an excellent overall activity, requiring voltages 1.561 1.663 V 100 durability 1 m KOH, respectively. Most importantly, stable >120 h, even when , which prominently superior IrO (+) //Pt (−) coupled noble electrodes, among best thus far. Detailed theoretical calculations reveal interfacial interaction between P Co can further improve H* binding energy sites.

Язык: Английский

---

A review of recent advances in alkaline electrolyzer for green hydrogen production: Performance improvement and applications

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 49, С. 458 - 488

Опубликована: Авг. 25, 2023

Язык: Английский

---

A review on recent trends, challenges, and innovations in alkaline water electrolysis

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 64, С. 599 - 625

Опубликована: Март 30, 2024

Язык: Английский

---

Designing electrocatalysts for seawater splitting: surface/interface engineering toward enhanced electrocatalytic performance

Green Chemistry, Год журнала: 2023, Номер 25(10), С. 3767 - 3790

Опубликована: Янв. 1, 2023

Schematic illustration of interface/surface engineering strategies with various effective approaches for high-performance HER/OER electrocatalysts in seawater.

Язык: Английский

---

High-performance multidimensional-structured N-doped nickel modulated Mo2N/FeOxNy bifunctional electrocatalysts for efficient alkaline seawater splitting

Chemical Engineering Journal, Год журнала: 2024, Номер 489, С. 151348 - 151348

Опубликована: Апрель 16, 2024

Язык: Английский

---

Rare-Earth-Modified NiS₂ Improves OH Coverage for an Industrial Alkaline Water Electrolyzer

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(8), С. 5324 - 5332

Опубликована: Фев. 14, 2024

The low coverage rate of anode OH adsorption under high current density conditions has become an important factor restricting the development industrial alkaline water electrolyzer (AWE). Here, we present our rare earth modification promotion strategy on using oxygen-friendly interface to increase NiS2 surface for efficient AWE catalysis. Density functional theory calculations predict that earths can enhance OH, and synthesis reaction mechanism is discussed in process spectrum. Experimentally, by preparing a series rare-earth-modified NiS2, relationship between coverage, active site density, catalytic activity was established attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, time-resolved absorption spectra, so on. unique oxygenophilic properties thereby increasing sites Furthermore, Eu2O3/NiS2 assembled into equipment operated stably over 240 h at 300 mA cm–2 80 °C 30% KOH. Rare-earth-modified exhibits better than traditional non-noble metal catalysts Ni(OH)2 providing new approach solve problem anode.

Язык: Английский

---

Hierarchical Interconnected NiMoN with Large Specific Surface Area and High Mechanical Strength for Efficient and Stable Alkaline Water/Seawater Hydrogen Evolution

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Июнь 19, 2023

NiMo-based nanostructures are among the most active hydrogen evolution reaction (HER) catalysts under an alkaline environment due to their strong water dissociation ability. However, these vulnerable destructive effects of H2 production, especially at industry-standard current densities. Therefore, developing a strategy improve mechanical strength while maintaining or even further increasing activity nanocatalysts is great interest both research and industrial communities. Here, hierarchical interconnected NiMoN (HW-NiMoN-2h) with nanorod-nanowire morphology was synthesized based on rational combination hydrothermal bath processes. HW-NiMoN-2h found exhibit excellent HER accomodation abundant sites its morphology, in which nanowires connect free-standing nanorods, concurrently strengthening structural stability withstand production 1 A cm-2. Seawater attractive feedstock for electrolysis since generation desalination can be addressed simultaneously single process. The performance seawater suggests that presence Na+ ions interferes reation kinetics, thus lowering slightly. benefiting from characteristics, deliver outstanding cm-2 130 mV overpotential over 70 h M KOH seawater.

Язык: Английский

---

Dealloyed NiTiZrAg as an efficient electrocatalyst for hydrogen evolution in alkaline seawater

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 53, С. 318 - 324

Опубликована: Дек. 9, 2023

Язык: Английский

---