A heterogeneous interface on NiS@Ni3S2/NiMoO4 heterostructures for efficient urea electrolysis

Sha, Linna; Liu, Tian‐Fu; Ye, Ke; Zhu, Kai; Yan, Jun; Yin, Jinling

doi:10.1039/d0ta04944a

Cited by 141 publications

(84 citation statements)

References 58 publications

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“…At the potential regions of −0.75 to −0.3 V in the forward sweeps and −0.2 to −0.4 V in the backward sweeps, the peaks are attributed to the hydrogen desorption and reduction of palladium oxides formed on all electrocatalyst surfaces, respectively . Moreover, the peaks at the potential of 0.4–0.6 V in the Pd–Ni/N-rGO curve are assigned to the electrochemical conversion of NiOOH/Ni(OH) 2 . − The CV of Pd–Co/N-rGO is similar to that of Pd/N-rGO, but the peaks for the metal oxide formation region (above 0.4 V) are more potent than those in Pd/N-rGO …”

Section: Resultsmentioning

confidence: 73%

Novel Bimetallic Pd–X (X = Ni, Co) Nanoparticles Assembled on N-Doped Reduced Graphene Oxide as an Anode Catalyst for Highly Efficient Direct Sodium Borohydride–Hydrogen Peroxide Fuel Cells

Hosseini

Daneshvari-Esfahlan

Wolf

et al. 2021

ACS Appl. Energy Mater.

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Bimetallic Pd−X (X = Ni, Co) nanoparticles on nitrogen-doped reduced graphene oxide (N-rGO) are fabricated through a thermal solid-state technique followed by polyol reduction to be used as anode electrocatalysts for direct sodium borohydride−hydrogen peroxide fuel cells. The physical characterization of synthesized materials is investigated using Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. The results confirm the uniform distribution of nanoparticles on nitrogen-doped reduced graphene oxide with a size of 11−13 nm. The electrochemical half-cell tests are used to study their electrocatalytic properties toward borohydride oxidation in an alkaline solution. Although perfect performance is observed for both catalysts, Pd−Ni/N-rGO indicates a higher current density, better stability, more negative onset potential, lower activation energy, and smaller charge-transfer resistance than the other. Kinetic studies suggest a first-order reaction with 6.83 and 6.06 electrons exchanged during the borohydride oxidation reaction for Pd−Ni/N-rGO and Pd−Co/N-rGO electrocatalysts, respectively. Finally, a direct sodium borohydride−hydrogen peroxide fuel cell is assembled using Pt/C as a cathode and Pd−X (X = Ni, Co)/N-rGO as an anode. Maximum power density values of 353.84 and 275.35 mW cm −2 at 60 °C are obtained for Pd−Ni/N-rGO and Pd−Co/N-rGO, respectively.

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Section: Resultsmentioning

confidence: 73%

Novel Bimetallic Pd–X (X = Ni, Co) Nanoparticles Assembled on N-Doped Reduced Graphene Oxide as an Anode Catalyst for Highly Efficient Direct Sodium Borohydride–Hydrogen Peroxide Fuel Cells

Hosseini

Daneshvari-Esfahlan

Wolf

et al. 2021

ACS Appl. Energy Mater.

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“…Such a novel strategy for designing advanced UOR catalysts has been adopted by other researchers. 162–164 Wang's group prepared a CoMn/CoMn 2 O 4 heterojunction catalyst on Ni foam via in situ electrochemical treatment of CoMn 2 O 4 . 63 The as-fabricated CoMn/CoMn 2 O 4 heterojunction induced electron transfer from CoMn to CoMn 2 O 4 spontaneously, resulting in the generation of electrophilic (CoMn) and nucleophilic (CoMn 2 O 4 ) regions, respectively.…”

Section: Strategies For Designing Efficient Uor Electrocatalystsmentioning

confidence: 99%

Strategies for designing more efficient electrocatalysts towards the urea oxidation reaction

et al. 2022

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“…Table S1: Comparison of UOR performance for the Cu/Fe-MOF/NF with respect to reported high-performance UOR electrocatalysts. References [ 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 ] were cited in Supplementary Materials.…”

mentioning

confidence: 99%

Bimetallic Cu/Fe MOF-Based Nanosheet Film via Binder-Free Drop-Casting Route: A Highly Efficient Urea-Electrolysis Catalyst

et al. 2022

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Developing efficient electrocatalysts for urea oxidation reaction (UOR) can be a promising alternative strategy to substitute the sluggish oxygen evolution reaction (OER), thereby producing hydrogen at a lower cell-voltage. Herein, we synthesized a binder-free thin film of ultrathin sheets of bimetallic Cu-Fe-based metal–organic frameworks (Cu/Fe-MOFs) on a nickel foam via a drop-casting route. In addition to the scalable route, the drop-casted film-electrode demonstrates the lower UOR potentials of 1.59, 1.58, 1.54, 1.51, 1.43 and 1.37 V vs. RHE to achieve the current densities of 2500, 2000, 1000, 500, 100 and 10 mA cm−2, respectively. These UOR potentials are relatively lower than that acquired by the pristine Fe-MOF-based film-electrode synthesized via a similar route. For example, at 1.59 V vs. RHE, the Cu/Fe-MOF electrode exhibits a remarkably ultra-high anodic current density of 2500 mA cm—2, while the pristine Fe-MOF electrode exhibits only 949.10 mA cm−2. It is worth noting that the Cu/Fe-MOF electrode at this potential exhibits an OER current density of only 725 mA cm—2, which is far inconsequential as compared to the UOR current densities, implying the profound impact of the bimetallic cores of the MOFs on catalyzing UOR. In addition, the Cu/Fe-MOF electrode also exhibits a long-term electrochemical robustness during UOR.

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A heterogeneous interface on NiS@Ni₃S₂/NiMoO₄ heterostructures for efficient urea electrolysis

Abstract: Urea electrolysis is an appealing energy conversion technology to produce hydrogen (H2) and alleviating the problem of urea-rich wastewater treatment concurrently. In particular, the electrocatalytic performance can be dramatically enhanced...

Cited by 141 publications

References 58 publications

Novel Bimetallic Pd–X (X = Ni, Co) Nanoparticles Assembled on N-Doped Reduced Graphene Oxide as an Anode Catalyst for Highly Efficient Direct Sodium Borohydride–Hydrogen Peroxide Fuel Cells

Novel Bimetallic Pd–X (X = Ni, Co) Nanoparticles Assembled on N-Doped Reduced Graphene Oxide as an Anode Catalyst for Highly Efficient Direct Sodium Borohydride–Hydrogen Peroxide Fuel Cells

Strategies for designing more efficient electrocatalysts towards the urea oxidation reaction

Bimetallic Cu/Fe MOF-Based Nanosheet Film via Binder-Free Drop-Casting Route: A Highly Efficient Urea-Electrolysis Catalyst

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