Carbides of group IVA, VA and VIA transition metals as alternative HER and ORR catalysts and support materials

Regmi, Yagya N.; Waetzig, Gregory R.; Duffee, Kyle D.; Schmuecker, Samantha M.; Thode, James M.; Leonard, Brian M.

doi:10.1039/c5ta01296a

Cited by 165 publications

(106 citation statements)

References 31 publications

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“…The β‐Mo 2 C exhibited distinct HER activity, the overpotential with current density of 10 mA cm −2 is about 387 mV. The remarkably low HER performance was consistent with the reported one in previous work where the β‐Mo 2 C catalyst was also prepared by molten salt method . The large size and the dense surface of Mo 2 C particles should be responsible for this performance.…”

Section: Resultssupporting

confidence: 88%

“…The remarkably low HER performance was consistent with the reported one in previous work where the β-Mo 2 C catalyst was also prepared by molten salt method. [40] The large size and the dense surface of Mo 2 C particles should be responsible for this performance. As compared to β-Mo 2 C, NiO/β-Mo 2 C exhibited relatively lower HER activity, the overpotential with a current density of 10 mA cm À 2 is about 483 mV, which is larger than that of β-Mo 2 C by 96 mV.…”

Section: Catalysts Preparation and Characterizationmentioning

confidence: 99%

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Sandwiched NiO/β‐Mo₂C/RGO as Improved Electrocatalyst for Hydrogen Evolution Reaction: Solvothermal‐Assisted Self‐Assembly and Catalytic Mechanism

Ruan

Zhu

et al. 2019

ChemElectroChem

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Molybdenum carbide is a cost‐effective alternative to Pt‐group noble metal electrocatalyst for hydrogen evolution reaction (HER), developing a facile strategy to improve the HER activity of molybdenum carbide and understanding the mechanism is of great concern and challenging. Herein, a solvothermal‐assisted self‐assembly procedure of fabricating sandwiched NiO/β‐Mo2C/RGO nanocomposite catalyst was reported. Electrochemical measurements demonstrate that the catalytic activity and durability of β‐Mo2C can be significantly improved in the sandwiched NiO/β‐Mo2C/RGO. Comparative studies between various catalysts such as β‐Mo2C, NiO/β‐Mo2C, β‐Mo2C/RGO, and NiO/β‐Mo2C/RGO have been performed to explore the mechanism underpinning their different catalytic performance. Our results revealed that hybrid of β‐Mo2C and RGO resulted in significant improvement in electrical conductivity, NiO loading modified the electron density on the surface of β‐Mo2C (101) to the electron‐rich state to generate highly active catalytic site. The synergistic effect of RGO and NiO loading would be responsible for the improved electrocatalytic performance of the NiO/β‐Mo2C/RGO catalysts. The strategy developed in this work not only provides a new pathway for improving HER activity of molybdenum carbide but also deepens fundamental understandings on the structure‐reactivity of molybdenum carbide‐based nanocomposite catalysts with higher HER activity.

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Section: Resultssupporting

confidence: 88%

Section: Catalysts Preparation and Characterizationmentioning

confidence: 99%

Sandwiched NiO/β‐Mo₂C/RGO as Improved Electrocatalyst for Hydrogen Evolution Reaction: Solvothermal‐Assisted Self‐Assembly and Catalytic Mechanism

Ruan

Zhu

et al. 2019

ChemElectroChem

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“…Regmi et al 42 . compared the electroactivity of 9 TMCs for HER, and found that Mo2C catalyst had significantly higher activity than others, followed by WC and V8C7 in order.…”

Section: Transition Metal Carbidesmentioning

confidence: 99%

Nanostructured catalysts for electrochemical water splitting: current state and prospects

et al. 2016

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Hydrogen is an ideal candidate for the replacement of fossil fuels in the future due to its zero emission of the carbonaceous species during its utilization. Water electrolysis is a dependable link of primary renewable energy and stable hydrogen energy. In this work, the fundamentals of water electrolysis, current popular electrocatalysts developed for cathodic hydrogen evolution reaction (HER) and anodic oxygen evoltion reacion (OER) in liquid electrolyte water electrolysis are reviewed. The main HER catalysts include noble metals, non-noble metal and composites, noble metal-free alloy, metal carbides, chalcogenides, phosphides and metal-free materials while the OER catalysts are focused on efficient Co-based, Ni-based materials and layered double hydroxides (LDH) materials. The strategies to improve catalytic activity, long-term durability and endurance to electrochemical erosions are introduced. The main challenges and future prospects for the further development of electrodes for water electrolysis are discussed. It is expected to give a guidance to the development of novel nanostructured electrocatalysts with low-cost for the electrochemical water splitting.

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“…[10] In 2011, Shen and co-workers first took advantage of the platinum-like feature of V 8 C 7 to reduce the usage of Pt. Specially, they concluded that Mo 2 C, WC, and V 8 C 7 deliver particularly enhanced HER activity compared with others.…”

mentioning

confidence: 99%

A New Platinum‐Like Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH: Single‐Crystal Metallic Interweaved V₈C₇ Networks

Wan

Zhang

et al. 2018

Advanced Energy Materials

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Carbides of group IVA, VA and VIA transition metals as alternative HER and ORR catalysts and support materials

Abstract: Nano-carbides were synthesized and tested as catalysts and supports for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR).

Cited by 165 publications

References 31 publications

Sandwiched NiO/β‐Mo₂C/RGO as Improved Electrocatalyst for Hydrogen Evolution Reaction: Solvothermal‐Assisted Self‐Assembly and Catalytic Mechanism

Sandwiched NiO/β‐Mo₂C/RGO as Improved Electrocatalyst for Hydrogen Evolution Reaction: Solvothermal‐Assisted Self‐Assembly and Catalytic Mechanism

Nanostructured catalysts for electrochemical water splitting: current state and prospects

A New Platinum‐Like Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH: Single‐Crystal Metallic Interweaved V₈C₇ Networks

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Carbides of group IVA, VA and VIA transition metals as alternative HER and ORR catalysts and support materials

Abstract: Nano-carbides were synthesized and tested as catalysts and supports for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR).

Cited by 165 publications

References 31 publications

Sandwiched NiO/β‐Mo2C/RGO as Improved Electrocatalyst for Hydrogen Evolution Reaction: Solvothermal‐Assisted Self‐Assembly and Catalytic Mechanism

Sandwiched NiO/β‐Mo2C/RGO as Improved Electrocatalyst for Hydrogen Evolution Reaction: Solvothermal‐Assisted Self‐Assembly and Catalytic Mechanism

Nanostructured catalysts for electrochemical water splitting: current state and prospects

A New Platinum‐Like Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH: Single‐Crystal Metallic Interweaved V8C7 Networks

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Product

Resources

About

Sandwiched NiO/β‐Mo₂C/RGO as Improved Electrocatalyst for Hydrogen Evolution Reaction: Solvothermal‐Assisted Self‐Assembly and Catalytic Mechanism

Sandwiched NiO/β‐Mo₂C/RGO as Improved Electrocatalyst for Hydrogen Evolution Reaction: Solvothermal‐Assisted Self‐Assembly and Catalytic Mechanism

A New Platinum‐Like Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH: Single‐Crystal Metallic Interweaved V₈C₇ Networks