Hydrazine-assisted electrochemical hydrogen production by efficient and self-supported electrodeposited Ni-Cu-P@Ni-Cu nano-micro dendrite catalyst

Darband, Gh. Barati; Lotfi, N.; Aliabadi, A.; Hyun, Suyeon; Shanmugam, Sangaraju

doi:10.1016/j.electacta.2021.138335

Cited by 52 publications

(20 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure b clearly compares the overpotentials at both 10 and 50 mA cm –2 current densities and clearly shows that a lower overpotential is required for CoMo/CoMoP/NF. The current OER electrocatalytic activity of CoMo/CoMoP/NF is superior to many recently reported novelty OER catalysts (Figure h), such as Ce-doped CoMoP/MoP@C (287 mV), Ni-Cu-P@Ni-Cu (270 mV), and Co-Mo 2 C@NC (338 mV), and so on. ,,,,,− In addition, we further compared the properties of CoMo/CoMoP/NF with monometallic phosphide/alloy as well as investigated the effect of different alloy ratios (different electrodeposition times) on the performance of the samples. As shown in Figure S9, the CoMo/CoMoP/NF electrocatalyst still shows absolute advantages in terms of both HER and OER, indicating the superiority of the bimetallic phosphides and the importance of a suitable interface for the catalytic activity.…”

Section: Resultsmentioning

confidence: 93%

Synergistically Coupled CoMo/CoMoP Electrocatalyst for Highly Efficient and Stable Overall Water Splitting

Zheng

Liu

et al. 2022

Inorg. Chem.

View full text Add to dashboard Cite

Finding reservoir-rich and efficient bifunctional electrocatalysts for water splitting is key to further sustainable energy development. Transition metal phosphides (TMPs) are extensively exploited as effective electrocatalysts, but the construction of strong coupling interfaces to improve catalytic performance by simple methods is still a bottleneck. Here, we designed and prepared a novel heterostructure electrocatalyst composed of cobalt–molybdenum (CoMo) alloy particles integrated with CoMoP nanosheets via the method of template-assisted conversion, followed by electrodeposition. Thanks to the strong interfacial coupling and synergistic effect between CoMo alloy particles and CoMoP nanosheets, the prepared CoMo/CoMoP/NF shows outstanding activity with overpotentials of only 29 mV for the hydrogen evolution reaction (HER) and 246 mV for the oxygen evolution reaction (OER) in 1 M KOH at a current density of 10 mA cm–2. Furthermore, the assembled CoMo/CoMoP || CoMo/CoMoP electrode can attain 10 mA cm–2 with a low battery voltage of 1.54 V. This study offers a valuable reference to the construction of bimetallic alloy/bimetallic phosphide heterostructure electrocatalysts, which applies to the large-scale application of electrocatalytic energy conversion technology.

show abstract

Section: Resultsmentioning

confidence: 93%

Synergistically Coupled CoMo/CoMoP Electrocatalyst for Highly Efficient and Stable Overall Water Splitting

Zheng

Liu

et al. 2022

Inorg. Chem.

View full text Add to dashboard Cite

show abstract

“…Thus, the challenge to driving the practicality of HzOR-assisted electrolyzers is the development of efficient and stable electrode materials. Recently, precious metal-based materials exhibit high catalytic activity, but their wide application is hindered because of their scarcity and high price. , In this regard, earth-abundant non-noble metal-based materials, including alloys, phosphide, selenide, and sulfide, gradually gained attention owing to the rich variable valence states and abundant reserves. − Molybdenum disulfide (MoS 2 ) is a well-studied HER material that has gained widespread attention due to its high activity and stability. − Previous works reported that MoS 2 has abundant unsaturated sulfur atoms on the edges as well as optimal adsorption free energy of H*, leading to high HER performances . However, the limited catalytic performance of HzOR results in few studies about using MoS 2 as an electrocatalyst to date.…”

Section: Introductionmentioning

confidence: 99%

Interface Coupling of Cobalt Hydroxide/Molybdenum Disulfide Heterostructured Nanosheet Arrays for Highly Efficient Hydrazine-Assisted Hydrogen Generation

Cheng

Tong

2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Hydrazine oxidation assisting water splitting is considered as a promising strategy toward the highly efficient and energy-saving hydrogen acquirement. However, the development of efficient and stable electrocatalysts for hydrazine hydrate oxidation (HzOR) as well as hydrogen evolution reaction (HER) still remains challenging. In this study, an interface-coupled Co(OH)2/MoS2 nanosheet array is designed to form a synergistic hierarchical heterostructure on a carbon cloth substrate, which is shown to have superior bifunctional performance for HzOR/HER under alkaline conditions. Benefiting from the abundant electrocatalytic active sites and improved reaction kinetics, the Co(OH)2/MoS2/CC electrode shows superior bifunctional performances with low potentials of −134 and 177 mV at 100 mA cm–2 for HER and HzOR, respectively. For the hydrazine-assisted overall water electrolyzer system (OHzS), the Co(OH)2/MoS2/CC electrode delivers low potentials of 142, 197, and 271 mV to realize 10, 50, and 100 mA cm–2, which proves the promising potential application in large-scale preparation of hydrogen fuel. This strategy put forward a simple way toward robust and economic electrodes for energy-related systems.

show abstract

“…For the large‐scale water‐splitting applications, countless gas bubbles are instantly generated on the catalyst surface, especially at large current density, the evolved gas bubbles tend to aggregate or pin on the surface of the electrode, which would decrease the exposed active sites, block the electrolyte diffusion channel and thus increase the reaction resistance, resulting in inferior OER activity and stability. [ 24–26 ] To address this issue, substantial efforts have been devoted to engineer surface properties with superaerophobicity by constructing nanostructured architecture, endowing the catalyst with a strong capability to reduce the gas adhesive force, accelerate the release of oxygen bubbles and eliminate the bubble accumulation on catalyst surface. For example, Jiang's group communicated a unique superaerophobic CoMoS x /NF catalyst exhibiting high OER activity with a low overpotential of 442 mV to reach the current density of 500 mA cm −2 in alkaline media.…”

Section: Introductionmentioning

confidence: 99%

Ambient Fast Synthesis of Superaerophobic/Superhydrophilic Electrode for Superior Electrocatalytic Water Oxidation

Shen¹,

Li³

et al. 2023

Energy & Environ Materials

View full text Add to dashboard Cite

Developing cost‐effective and facile methods to synthesize efficient and stable electrocatalysts for large‐scale water splitting is highly desirable but remains a significant challenge. In this study, a facile ambient temperature synthesis of hierarchical nickel–iron (oxy)hydroxides nanosheets on iron foam (FF‐FN) with both superhydrophilicity and superaerophobicity is reported. Specifically, the as‐fabricated FF‐FN electrode demonstrates extraordinary oxygen evolution reaction (OER) activity with an ultralow overpotential of 195 mV at 10 mA cm−2 and a small Tafel slope of 34 mV dec−1 in alkaline media. Further theoretical investigation indicates that the involved lattice oxygen in nickel–iron‐based‐oxyhydroxide during electrochemical self‐reconstruction can significantly reduce the OER reaction overpotential via the dominated lattice oxygen mechanism. The rechargeable Zn–air battery assembled by directly using the as‐prepared FF‐FN as cathode displays remarkable cycling performance. It is believed that this work affords an economical approach to steer commercial Fe foam into robust electrocatalysts for sustainable energy conversion and storage systems.

show abstract

Hydrazine-assisted electrochemical hydrogen production by efficient and self-supported electrodeposited Ni-Cu-P@Ni-Cu nano-micro dendrite catalyst

Cited by 52 publications

References 61 publications

Synergistically Coupled CoMo/CoMoP Electrocatalyst for Highly Efficient and Stable Overall Water Splitting

Synergistically Coupled CoMo/CoMoP Electrocatalyst for Highly Efficient and Stable Overall Water Splitting

Interface Coupling of Cobalt Hydroxide/Molybdenum Disulfide Heterostructured Nanosheet Arrays for Highly Efficient Hydrazine-Assisted Hydrogen Generation

Ambient Fast Synthesis of Superaerophobic/Superhydrophilic Electrode for Superior Electrocatalytic Water Oxidation

Contact Info

Product

Resources

About