Transition metal-based self-supported anode for electrocatalytic water splitting at a large current density

Li, Zhong; Zhang, Xinglin; Ou, Changjin; Zhang, Yizhou; Wang, Wenjun; Dong, Shengyang; Dong, Xiaochen

doi:10.1016/j.ccr.2023.215381

Cited by 37 publications

(5 citation statements)

References 219 publications

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“…Readers who are interested in large-current-density OER electrocatalysts can refer to some previous review articles. [42,43] The catalysts discussed here are those commonly operated at current densities higher than 500 mA cm À 2 , as the target current density of water electrolysis in industry is higher than it. Herein, our review is more focused on catalysis, and we present the design strategies for largecurrent-density HER electrocatalysts from the aspect of catalysis science to provide more general principles for the future catalyst design in this emerging area.…”

Section: Introductionmentioning

confidence: 99%

“…In this review, we summarize recent advances in large‐current‐density HER electrocatalysts. Readers who are interested in large‐current‐density OER electrocatalysts can refer to some previous review articles [42,43] . The catalysts discussed here are those commonly operated at current densities higher than 500 mA cm −2 , as the target current density of water electrolysis in industry is higher than it.…”

Section: Introductionmentioning

confidence: 99%

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Design Strategies towards Advanced Hydrogen Evolution Reaction Electrocatalysts at Large Current Densities

Qiao,

Li,

Fei

et al. 2024

Chemistry A European J

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Hydrogen (H2), produced by water electrolysis with the electricity from renewable sources, is an ideal energy carrier for achieving a carbon‐neutral and sustainable society. Hydrogen evolution reaction (HER) is the cathodic half‐reaction of water electrolysis, which requires active and robust electrocatalysts to reduce the energy consumption for H2 generation. Despite numerous electrocatalysts have been reported by the academia for HER, most of them were only tested under relatively small current densities for a short period, which cannot meet the requirements for industrial water electrolysis. To bridge the gap between academia and industry, it is crucial to develop highly active HER electrocatalysts which can operate at large current densities for a long time. In this review, the mechanisms of HER in acidic and alkaline electrolytes are firstly introduced. Then, design strategies towards high‐performance large‐current‐density HER electrocatalysts from five aspects including number of active sites, intrinsic activity of each site, charge transfer, mass transfer, and stability are discussed via featured examples. Finally, our own insights about the challenges and future opportunities in this emerging field are presented.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design Strategies towards Advanced Hydrogen Evolution Reaction Electrocatalysts at Large Current Densities

Qiao,

Li,

Fei

et al. 2024

Chemistry A European J

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“…Notably, their electrochemical properties are also greatly influenced by the contact between the electrocatalysts and the substrate. Self-supported catalysts are reported to possess efficient electron transfer pathways, and no additional binder, conductive agents, or collectors are needed. − Herein, we propose to fabricate self-supported WO 3 @RuO 2 heterostructure nanowires (NWs) (WO 3 @RuO 2 NWs) grown on titanium mesh. WO 3 is selected due to its commendable conductivity, straightforward synthesis methods, and durable stability in acidic conditions. , It typically shows a one-dimensional structure with a high specific surface area through the hydrothermal method, which is beneficial for preventing RuO 2 from agglomeration and expediting electron transfer during electrocatalytic reactions .…”

Section: Introductionmentioning

confidence: 99%

Self-Supported WO₃@RuO₂ Nanowires for Electrocatalytic Acidic Water Oxidation

Zhang,

Wu,

Zhang

et al. 2024

Inorg. Chem.

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Developing catalysts with high catalytic activity and stability in acidic media is crucial for advancing hydrogen production in proton exchange membrane water electrolyzers (PEMWEs). To this end, a self-supported WO 3 @RuO 2 nanowire structure was grown in situ on a titanium mesh using hydrothermal and ion-exchange methods. Despite a Ru loading of only 0.098 wt %, it achieves an overpotential of 246 mV for the oxygen evolution reaction (OER) at a current density of 10 mA•cm −2 in acidic 0.5 M H 2 SO 4 while maintaining excellent stability over 50 h, much better than that of the commercial RuO 2 . After the establishment of the WO 3 @RuO 2 heterostructure, a reduced overpotential of the rate-determining step from M−O* to M−OOH* is confirmed by the DFT calculation. Meanwhile, its enhanced OER kinetics are also greatly improved by this self-supported system in the absence of the organic binder, leading to a reduced interface resistance between active sites and electrolytes. This work presents a promising approach to minimize the use of noble metals for large-scale PEMWE applications.

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“…[ 2 ] Overcoming these challenges necessitates the development of cost‐effective and stable electrocatalysts capable of efficiently and continuously converting H 2 O into high‐purity hydrogen and oxygen. [ 3 ] However, given the disparities in the catalytic mechanisms governing OER and HER, different catalysts need designed and developed to minimize the overpotential for electrocatalytic water splitting, [ 4 ] which is undoubtedly complicated and costly. Hence, the continued development of low‐cost, efficient, and stable bifunctional electrocatalytic materials for overall efficient water splitting holds significant promises but also presents ongoing challenges.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Electronic Interactions Between Ultrathin NiFe‐MOF Nanosheets and Ir Nanoparticles Heterojunctions Leading to Efficient Overall Water Splitting

Li,

Zhang,

Cao

et al. 2024

Advanced Science

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Creating specific noble metal/metal‐organic framework (MOF) heterojunction nanostructures represents an effective strategy to promote water electrolysis but remains rather challenging. Herein, a heterojunction electrocatalyst is developed by growing Ir nanoparticles on ultrathin NiFe‐MOF nanosheets supported by nickel foam (NF) via a readily accessible solvothermal approach and subsequent redox strategy. Because of the electronic interactions between Ir nanoparticles and NiFe‐MOF nanosheets, the optimized Ir@NiFe‐MOF/NF catalyst exhibits exceptional bifunctional performance for the hydrogen evolution reaction (HER) (η10 = 15 mV, η denotes the overpotential) and oxygen evolution reaction (OER) (η10 = 213 mV) in 1.0 m KOH solution, superior to commercial and recently reported electrocatalysts. Density functional theory calculations are used to further investigate the electronic interactions between Ir nanoparticles and NiFe‐MOF nanosheets, shedding light on the mechanisms behind the enhanced HER and OER performance. This work details a promising approach for the design and development of efficient electrocatalysts for overall water splitting.

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Transition metal-based self-supported anode for electrocatalytic water splitting at a large current density

Cited by 37 publications

References 219 publications

Design Strategies towards Advanced Hydrogen Evolution Reaction Electrocatalysts at Large Current Densities

Design Strategies towards Advanced Hydrogen Evolution Reaction Electrocatalysts at Large Current Densities

Self-Supported WO₃@RuO₂ Nanowires for Electrocatalytic Acidic Water Oxidation

Interfacial Electronic Interactions Between Ultrathin NiFe‐MOF Nanosheets and Ir Nanoparticles Heterojunctions Leading to Efficient Overall Water Splitting

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Transition metal-based self-supported anode for electrocatalytic water splitting at a large current density

Cited by 37 publications

References 219 publications

Design Strategies towards Advanced Hydrogen Evolution Reaction Electrocatalysts at Large Current Densities

Design Strategies towards Advanced Hydrogen Evolution Reaction Electrocatalysts at Large Current Densities

Self-Supported WO3@RuO2 Nanowires for Electrocatalytic Acidic Water Oxidation

Interfacial Electronic Interactions Between Ultrathin NiFe‐MOF Nanosheets and Ir Nanoparticles Heterojunctions Leading to Efficient Overall Water Splitting

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Self-Supported WO₃@RuO₂ Nanowires for Electrocatalytic Acidic Water Oxidation