Coupling NiCo Alloy and CeO<sub>2</sub> to Enhance Electrocatalytic Hydrogen Evolution in Alkaline Solution

Sun, Hongming; Tian, Caiying; Li, Yilin; Wu, Jing; Wang, Quanle; Yan, Zhenhua; Li, Cheng‐Peng; Cheng, Peng; Du, Miao

doi:10.1002/adsu.202000122

Cited by 40 publications

(31 citation statements)

References 64 publications

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“…At this point, metal alloys came into the research range due to excellent permittivity and permeability, with NiCo alloys being the most notable [ 17 , 18 ]. NiCo alloys possess the characteristics of high-temperature calcination resistance, oxidation resistance, corrosion resistance, and easy extraction [ 19 , 20 ], and are widely used in high-tech fields such as aerospace.…”

Section: Introductionmentioning

confidence: 99%

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

et al. 2021

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Layered double hydroxides (LDHs) have a special structure and atom composition, which are expected to be an excellent electromagnetic wave (EMW) absorber. However, it is still a problem that obtaining excellent EMW-absorbing materials from LDHs. Herein, we designed heterostructure NiCo-LDHs@ZnO nanorod and then subsequent heat treating to derive NiCo@C/ZnO composites. Finally, with the synergy of excellent dielectric loss and magnetic loss, an outstanding absorption performance could be achieved with the reflection loss of − 60.97 dB at the matching thickness of 2.3 mm, and the widest absorption bandwidth of 6.08 GHz was realized at 2.0 mm. Moreover, this research work provides a reference for the development and utilization of LDHs materials in the field of microwave absorption materials and can also provide ideas for the design of layered structural absorbers.

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Section: Introductionmentioning

confidence: 99%

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

et al. 2021

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“…The expansion could be ascribed to the larger Co ions introduced into the tungsten oxide lattice (the ionic radii were listed in Table S1) [27,34] . Moreover, a smaller spacing of 0.204 nm was observed in the HRTEM image of the Co−WO sample, which might be attributed to the (111) plane of the Ni‐based alloy [31–33] . This can also be detected in WO as shown in Figure S4a.…”

Section: Resultsmentioning

confidence: 90%

“…In the XRD pattern, except for the peaks of WO 2.72 and WO 2 , there were peaks located at 44.09, 51.06 and 75.26°. The diffraction peaks of NiCo, NiFe and NiW alloy were all located closely around those position [31][32][33] and difficult to distinguish; therefore, the particles represented by these peaks were called Ni-based alloy. All three catalysts comprised tungsten oxide (WO 2.72 and WO 2 ) and Ni-based alloys, indicating that the addition of Co and Fe altered the morphology of the catalysts; however, their basic phase compositions were not modified, as observed by SEM and XRD.…”

Section: Resultsmentioning

confidence: 99%

Tuning the Electronic Structure of Tungsten Oxide for Enhanced Hydrogen Evolution Reaction in Alkaline Electrolyte

Zhang

et al. 2022

ChemElectroChem

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Engineering the electronic structure of HER catalysts has been suggested to improve the performance of noble metal‐free catalysts in alkaline electrolytes. Herein, we demonstrated that a suitable cation doping in the tungsten oxide catalyst modified the interfacial structure, surface chemical state and band gap value, which enhanced the HER performance. For the experiments, the cation (Ni, Co and Fe) doped tungsten oxide catalysts were synthesized on nickel foam, on which Ni‐based alloy was decorated. The Co doped catalyst (Co−WO) exhibited an extraordinary HER activity, with a low overpotential of 30 mV at a current density of 10 mA cm−2, Tafel slope of 32 mV dec−1. In this system, the Ni‐based alloy–tungsten oxide interface facilitated water dissociation. Moreover, the decreased band gap and improved conductivity induced by Co doping, further enhanced the charge transfer ability in the HER process. The regulated metal‐oxide heterostructure coupled with cation doping endowed the catalyst with efficient interface active sites, superior electrical conductivity, and enhanced electron transfer kinetics, facilitating the HER performance.

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“…[ 103 ] Therefore, recently, researchers have attempted to regulate the crystallinity and electronic properties of catalysts by introducing complexes into the defective CeO 2 system, including nitrides, [ 96,104 ] phosphides, [9b,101] hydroxides, [ 105 ] metals, [ 106 ] and alloys. [ 107 ] Yao et al developed a high‐performance CeO 2 /Co 4 N electrocatalyst for electrochemical hydrogen evolution, which enhanced the alkaline HER kinetics and long‐term stability (as shown in Figure 11d, the cyclic diagram). They also investigated the role of abundant oxygen vacancies by DFT calculations and experimental results [104a] .…”

Section: Applicationsmentioning

confidence: 99%

“…The superhydrophilic self‐supporting electrode structure and interfacial synergies promote water dissociation and optimize the hydrogen binding energy. [ 107 ]…”

Section: Applicationsmentioning

confidence: 99%

Defect Engineering on CeO₂‐Based Catalysts for Heterogeneous Catalytic Applications

et al. 2021

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With abundant crystal defects, cerium oxide (CeO2), widely used in heterogeneous catalysis, has attracted extensive attention. In recent years, researchers have investigated that the defect chemistry of CeO2 plays a vital role in its catalytic activity and have developed various defect introduction methods to synthesize stable and efficient defective CeO2‐based catalysts. Herein, the understanding, introduction, and applications of defect chemistry in CeO2‐based heterogeneous catalysis are reviewed, and the structure–activity relationship between defect engineering and catalytic performance is recommended with great emphasis. Interests are put into the investigation of how defects influence the activity and stability of defective CeO2 catalysts and effective strategies for fabricating efficient, stable, and defective CeO2 catalysts. Finally, the existing problems and perspectives of CeO2 defect chemistry for heterogeneous catalysis are displayed. This review provides a reference for in‐depth understanding and the design of more efficient CeO2‐based catalysts for heterogeneous catalysis.

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Coupling NiCo Alloy and CeO₂ to Enhance Electrocatalytic Hydrogen Evolution in Alkaline Solution

Abstract: Figure 2. High-resolution XPS spectra of a) Ni 2p, b) Ce 3d, c) Co 2p, and d) O 1s for the NiCo-CeO 2 /GP, NiCo/GP, and CeO 2 /GP electrodes.

Cited by 40 publications

References 64 publications

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

Tuning the Electronic Structure of Tungsten Oxide for Enhanced Hydrogen Evolution Reaction in Alkaline Electrolyte

Defect Engineering on CeO₂‐Based Catalysts for Heterogeneous Catalytic Applications

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Coupling NiCo Alloy and CeO2 to Enhance Electrocatalytic Hydrogen Evolution in Alkaline Solution

Abstract: Figure 2. High-resolution XPS spectra of a) Ni 2p, b) Ce 3d, c) Co 2p, and d) O 1s for the NiCo-CeO 2 /GP, NiCo/GP, and CeO 2 /GP electrodes.

Cited by 40 publications

References 64 publications

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

Tuning the Electronic Structure of Tungsten Oxide for Enhanced Hydrogen Evolution Reaction in Alkaline Electrolyte

Defect Engineering on CeO2‐Based Catalysts for Heterogeneous Catalytic Applications

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Coupling NiCo Alloy and CeO₂ to Enhance Electrocatalytic Hydrogen Evolution in Alkaline Solution

Defect Engineering on CeO₂‐Based Catalysts for Heterogeneous Catalytic Applications