Layered Ni−Co−P Electrode Synthesized by CV Electrodeposition for Hydrogen Evolution at Large Currents

Chen, Xiaogang; Zhao, Xuan; Wang, Yuanyuan; Wang, Shanshan; Shang, Yuanyuan; Xu, Jie; Guo, Fengmei; Zhang, Yingjiu

doi:10.1002/cctc.202100707

Cited by 11 publications

(10 citation statements)

References 65 publications

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“…The ECSA of the electrodes can be calculated by eq as follows ECSA = C dl 0.04 0.25em mF / c m 2 where C dl and C s represent the double layer capacitance and specific capacitance, respectively. C s of a 1 cm 2 flat surface area is usually taken as 0.04 mF/cm 2 . , The current density normalized by ECSA can be computed by eq as follows J ECSA = I C dl / C normals where J ECSA , I , and C dl / C s represent the normalized current density (mA/cm 2 ), current (mA), and ECSA (cm 2 ), respectively. The intrinsic activity (τ) of the electrode samples can be determined from the EIS parameter data.…”

Section: Resultsmentioning

confidence: 99%

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Hydrogen Evolution Reaction Performance of Ni–Co-Coated Graphene-Based 3D Printed Electrodes

2023

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Additive manufacturing has been a very promising topic in recent years for research and development studies and industrial applications. Its electrochemical applications are very popular due to the cost-effective rapid production from the environmentally friendly method. In this study, three-dimensional (3D) printed electrodes are prepared by Ni and Co coatings in different molar ratios. Different Ni/Co molar ratios (x:y) of the Ni/Co/x:y alloys are prepared as 1:1, 1:4, and 4:1 and they are named Ni/Co/1:1, Ni/Co/4:1, and Ni/Co/1:4, respectively. According to the results, when the 3D electrode samples are coated with Ni and Co at different molar ratios, the kinetic performance of the NiCo-coated 3D electrode samples for hydrogen evolution reaction is enhanced compared to that of the uncoated 3D electrode sample. The results indicate that the Ni/Co/1:4-coated 3D electrode has the highest kinetic activity for hydrogen evolution reactions (HERs). The calculated Tafel′s slope and overpotential value (η10) for HER are determined as 164.65 mV/dec and 101.92 mV, respectively. Moreover, the Ni/Co/1:4-coated 3D electrode has an 81.2% higher current density than the other electrode. It is observed that the 3D printing of the electrochemical electrodes is very promising when they are coated with Ni–Co metals in different ratios. This study provides a new perspective on the use of 3D printed electrodes for high-performance water electrolysis.

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Section: Resultsmentioning

confidence: 99%

“…C s of a 1 cm 2 flat surface area is usually taken as 0.04 mF/cm 2 . 74,75 The current density normalized by ECSA can be computed by eq 12 as follows…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Evolution Reaction Performance of Ni–Co-Coated Graphene-Based 3D Printed Electrodes

2023

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“…In another work, Zhang et al exploited a novel layer‐exfoliated layered Ni–Co–P catalyst by electrode cyclic voltammetry electrodeposition. [ 136 ] Due to the unique structure of the layered catalyst, the inner catalyst layer was re‐exposed to continue working after the outer layer of the catalyst was peeled off, ensuring the durability of catalytic activity. Notably, it can maintain at least 300 h at an extremely high current density of 1000 mA cm −2 .…”

Section: Macroscopic Design Of Electrodesmentioning

confidence: 99%

“…Co-P [140] 1 M KOH / 290 1000 mA cm À2 for 3000 h Ni─Co─P/CFP [136] 1 M KOH 170 295 1000 mA cm À2 for 300 h CoMoS X /NF [87] 1 M KOH 269 / 500 mA cm À2 for 100 h PS-Cu [146] 1 M KOH / 1200 (1200 mA cm À2 ) 100 mA cm À2 for 30 h CuMo 6 S 8 /Cu [147] 1 M KOH / 320 (1000 mA cm À2 ) 2500 mA cm À2 for 100 h 334 (2500 mA cm À2 ) Design of electrode surface Co(OH) x @NiMoO x @NF [151] 1 M KOH 185 322 1000 mA cm À2 for 11 days Ni 2 P-CoOOH [150] 1 M KOH %160 %400 (2000 mA cm À2 ) %1800 mA cm À2 for 100 h MoS 2 /Mo 2 C [50] 1 M KOH 191 220 200 mA cm À2 for 20 h…”

Section: Strategymentioning

confidence: 99%

“…[134,135] There are many self-supporting electrodes prepared by electrodeposition that meet industrially high current densities and have demonstrated exceptional stability. [136][137][138][139][140] For instance, Liu et al prepared porous cobalt phosphide by electrochemical anodization of commercially available cobalt foam followed by phosphorylation. [140] Correspondingly, it could stably operate for at least 3000 h at a constant current density of 1000 mA cm À2 and a voltage of 0.290 V versus RHE.…”

Section: Self-supported Electrocatalystsmentioning

confidence: 99%

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Rational Design of Hydrogen Evolution Reaction Electrocatalysts for Commercial Alkaline Water Electrolysis

Zhang

Ding³

et al. 2023

Small Structures

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With the further exploitation of renewable energy sources, electrochemical hydrogen evolution reaction (HER) is considered a key technology to solve environmental problems and achieve global carbon neutrality. Currently, alkaline water electrolyzers (AWEs) have been revitalized as a traditional electrolytic water production industry, yet they face great challenges in achieving new technological breakthroughs due to the catalytic properties of electrode materials. In alkaline media, besides the slow kinetics of oxygen evolution reaction, the sluggish HER needing water dissociation and the mass transfer problems at high current densities are among the major factors limiting the development of alkaline water electrolysis for industrial applications. Therefore, it is of great importance to design HER electrocatalysts with high activity and stability at high current densities (>500 mA cm−2) for industrial applications at the “Research and Development level” (R&D level). Herein, a brief overview of the development of AWEs at the industrial scale is presented, and some mainstream recognized catalysis mechanisms for HER in alkaline electrolytes are summarized. Based on the requirements of industrial application and theoretical guidance, the activation strategies of HER electrocatalysts are also summarized. This review will propose new insights into the future development of alkaline water electrolysis.

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Progress on the Design of Electrocatalysts for Large‐Current Hydrogen Production by Tuning Thermodynamic and Kinetic Factors

Li,

Feng,

Dai

et al. 2024

Adv Funct Materials

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Electrochemical water splitting to produce green hydrogen offers a promising technology for renewable energy conversion and storage, as well as realizing carbon neutrality. The efficiency, stability, and cost of electrocatalysts toward hydrogen evolution reaction (HER) and electrocatalytic overall water splitting (EOWS) at large current densities are essential for practical application. In this review, the key factors that determine the catalytic performance of electrocatalysts at large current densities are summarized from the angel of thermodynamic and kinetic correlation. The corresponding design strategies are presented. The electronic structure and density of active sites that affect the adsorption/desorption of intermediates are considered as the thermodynamic aspects, while charge transfer and mass transport capabilities closely associated with electrode resistance and intermediate diffusion are assigned as kinetic effects. Recent development of bifunctional and integrated electrocatalysts toward EOWS is also discussed in detail. Finally, the perspective and direction on the electrocatalytic water splitting under large current density are proposed. This comprehensive overview will offer profound insights and guidance for the continued advancement of this field.

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Layered Ni−Co−P Electrode Synthesized by CV Electrodeposition for Hydrogen Evolution at Large Currents

Cited by 11 publications

References 65 publications

Hydrogen Evolution Reaction Performance of Ni–Co-Coated Graphene-Based 3D Printed Electrodes

Hydrogen Evolution Reaction Performance of Ni–Co-Coated Graphene-Based 3D Printed Electrodes

Rational Design of Hydrogen Evolution Reaction Electrocatalysts for Commercial Alkaline Water Electrolysis

Progress on the Design of Electrocatalysts for Large‐Current Hydrogen Production by Tuning Thermodynamic and Kinetic Factors

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