Modulation of the crystalline/amorphous interface engineering on Ni-P-O-based catalysts for boosting urea electrolysis at large current densities

Xu, Xiujuan; Guo, Tong; Xia, Jiaoyuan; Zhao, Bolin; Su, Ge; Wang, Huanlei; Huang, Minghua; Toghan, Arafat

doi:10.1016/j.cej.2021.130514

Cited by 80 publications

(39 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 3–5 ] In this regard, replacing anodic OER with more thermodynamically favorable small‐molecule oxidation reactions has been desired and triggered flourishing research focus. Recently, many alternative OERs such as methanol, [ 6 ] urea, [ 7 ] 5‐hydroxymethylfurfural, [ 8 ] benzyl alcohol, [ 9 ] and hydrazine oxidation reaction (HzOR) [ 1,2 ] holds great potential to achieve ultralow cell voltage of OWS or produce value‐added products. Among which the HzOR has attracted extraordinary attention because of the significantly low theoretical oxidation potential (N 2 H 4 + 4OH − → N 2 + 4H 2 O + 4e − , −0.33 V vs RHE) and produce hydrogen with low energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Critical Role of Ruthenium Single Atom Sites in Water Dissociation and Dehydrogenation Behaviors for Robust Hydrazine Oxidation‐Boosted Alkaline Hydrogen Evolution

Wang

et al. 2022

Adv Funct Materials

103

View full text Add to dashboard Cite

Hydrazine oxidation (HzOR)-assisted overall water splitting (OWS) provides a unique approach to energy-efficient hydrogen production (HER). However, there are still major challenges in the design of bifunctional catalysts and gain deep insight into the mechanism of both water dissociation and dehydrogenation kinetics triggered by the same active species during HzOR-assisted OWS. Here, ruthenium single atoms (Ru SAs) anchored onto sulphur-vacancies of tungsten disulphide (WS 2 ) are prepared by a sulfidation and facile galvanostatic deposition strategy. The WS 2 /Ru SAs act as a bifunctional catalyst and outperforms commercial platinum (Pt) catalysts for both HzOR and HER. Ultralow potentials of −74 and −32.1 mV at 10 mA cm −2 are achieved for HzOR and HER, respectively. Two-electrode electrolyzer using WS 2 /Ru SAs as both anode and cathode reaches 10 mA cm −2 with cell voltage of only 15.4 mV, which is far below that of most electrocatalysts including commercial Pt. Density functional theory calculations unravel the critical role of Ru SAs in WS 2 , where the sluggish dissociation of water in HER can be promoted on Ru sites, and the sulfur sites of WS 2 exhibit a more thermoneutral behavior for hydrogen intermediate adsorption. Moreover, Ru sites are also active centers for stepwise hydrazine dehydrogenation during HzOR.

show abstract

Section: Introductionmentioning

confidence: 99%

Elucidating the Critical Role of Ruthenium Single Atom Sites in Water Dissociation and Dehydrogenation Behaviors for Robust Hydrazine Oxidation‐Boosted Alkaline Hydrogen Evolution

Wang

et al. 2022

Adv Funct Materials

103

View full text Add to dashboard Cite

show abstract

“…[10][11][12] Especially, urea electrolysis, which is assisted by the anodic urea oxidation reaction (UOR) that operates at a lower theoretical voltage of 0.37 V (vs RHE) than typical water oxidation (1.23 V, vs RHE), is highly compelling and can significantly improve the efficiency of H 2 production. [13,14] Besides, UOR is a central chemical reaction in direct urea fuel cells, urea-rich wastewater purification, and artificial kidneys. [15,16] While the anodic UOR process involves 6etransfer (CO(NH 2 ) 2 + 6OH − → N 2 + 5H 2 O + CO 2 + 6e − ), highly active and affordable electrocatalysts are required to boost the efficiency.…”

Section: Introductionmentioning

confidence: 99%

CoP Nanoparticle Confined in P, N Co‐Doped Porous Carbon Anchored on P‐Doped Carbonized Wood Fibers with Tailored Electronic Structure for Efficient Urea Electro‐Oxidation

Kang

Yang

Sheng

et al. 2022

Small

View full text Add to dashboard Cite

Electronic structure optimization and architecture modulation are widely regarded as rational strategies to enhance the electrocatalysts catalytic performance. Herein, a hybridization of ZIF‐67‐derived CoP nanoparticles embedded in P, N co‐doped carbon matrix (PNC) and anchored on P‐doped carbonized wood fibers (PCWF) is constructed using a simple simultaneous phosphorization and carbonization strategy. Benefiting from the optimized surface/interface electronic structures, abundant exposed active sites, and outstanding conductivity, the CoP@PNC/PCWF can drive the urea oxidation reaction (UOR) with greater activity and better stability than most recently reported electrocatalysts, in which a potential as low as 1.32 V (vs reversible hydrogen electrode, RHE) is needed to reach 50 mA cm‐2 and shows excellent durability. Furthermore, for overall urea splitting, using the CoP@PNC/PCWF electrocatalyst as the anode and commercial Pt/C supported on nickel foam as the cathode, an ultralow cell voltage of 1.50 V (vs RHE) is expected to achieve the 50 mA cm‐2 and operate continuously for more than 50 h at 20 mA cm‐2. The reported strategy may shed light on the use of renewable resources to design and synthesize high‐performance non‐Ni‐based phosphides UOR electrocatalysts for energy‐saving H2 production.

show abstract

“…Such materials can provide more defects as unsaturated active sites to show better activity compared with crystalline catalysts. , Besides, this novel structure with strong interface interactions would cause charge redistribution to optimize the electron structure. , Wu and Li et al , pointed out that the crystalline–amorphous heterostructure catalysts exhibit high activity by optimizing H atom desorption and H 2 O adsorption, which is confirmed by density functional theory (DFT) calculation. Huang et al reported that the crystalline–amorphous interfaces can provide more active sites, accompanied by boosting the absorption of urea molecules and breaking the chemical bonds to enhance the UOR activity.…”

Section: Introductionmentioning

confidence: 99%

Crystalline–Amorphous Ni₃S₂–NiMoO₄ Heterostructure for Durable Urea Electrolysis-Assisted Hydrogen Production at High Current Density

Zhuo

Jiang

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Developing bifunctional catalysts with good performance at a high current density for the urea oxidation reaction (UOR) and the hydrogen evolution reaction (HER) can effectively relieve the severe environmental and energy pressures. Herein, amorphous NiMoO4 decorated Ni3S2 grown on nickel foam (Ni3S2–NiMoO4/NF) is prepared to accelerate UOR and HER. The crystalline–amorphous heterostructure could regulate the interfacial electron structure to reduce the electron density near Ni3S2 for optimizing UOR and HER. The decoration of NiMoO4 enhances its anti-poisoning ability for CO-intermediate species to show good stability at high current densities. Meanwhile, the nano-/microstructure with high hydrophilicity improves mass transfer and the accessibility of electrolyte. Driving high current densities of ±1000 mA cm–2, it merely needs 1.38 V (UOR) and −263 mV (HER). For urea electrolysis, it can deliver 1000 mA cm–2 at 1.73 V and stably operate at 500 mA cm–2 for 120 h. Therefore, this study provides new ideas for durable urea electrolysis-assisted H2 production.

show abstract

Modulation of the crystalline/amorphous interface engineering on Ni-P-O-based catalysts for boosting urea electrolysis at large current densities

Cited by 80 publications

References 64 publications

Elucidating the Critical Role of Ruthenium Single Atom Sites in Water Dissociation and Dehydrogenation Behaviors for Robust Hydrazine Oxidation‐Boosted Alkaline Hydrogen Evolution

Elucidating the Critical Role of Ruthenium Single Atom Sites in Water Dissociation and Dehydrogenation Behaviors for Robust Hydrazine Oxidation‐Boosted Alkaline Hydrogen Evolution

CoP Nanoparticle Confined in P, N Co‐Doped Porous Carbon Anchored on P‐Doped Carbonized Wood Fibers with Tailored Electronic Structure for Efficient Urea Electro‐Oxidation

Crystalline–Amorphous Ni₃S₂–NiMoO₄ Heterostructure for Durable Urea Electrolysis-Assisted Hydrogen Production at High Current Density

Contact Info

Product

Resources

About

Modulation of the crystalline/amorphous interface engineering on Ni-P-O-based catalysts for boosting urea electrolysis at large current densities

Cited by 80 publications

References 64 publications

Elucidating the Critical Role of Ruthenium Single Atom Sites in Water Dissociation and Dehydrogenation Behaviors for Robust Hydrazine Oxidation‐Boosted Alkaline Hydrogen Evolution

Elucidating the Critical Role of Ruthenium Single Atom Sites in Water Dissociation and Dehydrogenation Behaviors for Robust Hydrazine Oxidation‐Boosted Alkaline Hydrogen Evolution

CoP Nanoparticle Confined in P, N Co‐Doped Porous Carbon Anchored on P‐Doped Carbonized Wood Fibers with Tailored Electronic Structure for Efficient Urea Electro‐Oxidation

Crystalline–Amorphous Ni3S2–NiMoO4 Heterostructure for Durable Urea Electrolysis-Assisted Hydrogen Production at High Current Density

Contact Info

Product

Resources

About

Crystalline–Amorphous Ni₃S₂–NiMoO₄ Heterostructure for Durable Urea Electrolysis-Assisted Hydrogen Production at High Current Density