Hydrogen overvoltage study on carbides of transition metals

Obolonchik, V. A.; Semenov-Kobzar', A. A.

doi:10.1007/bf00773739

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(2 citation statements)

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“…Transition metal carbides have received great attention as electrocatalysts for water splitting due to their high electrical conductivity, unique electronic structure, chemical stability, and low cost. ,,− Actually, the studies related to the carbide HER and OER electrocatalysts (i.e., TiC, ZrC, HfC, NbC, Cr 3 C 2 , Mo 2 C, WC, etc.) had already started in the late 1960s. , Among the carbide materials reported up to now, Ni-, Co-, and Fe-based carbides are good candidates for OER electrocatalysts due to the superb activity of Ni, Co, and Fe metals for alkaline OER electrocatalysis. ,,,,,,,,, Additionally, W- and Mo-based carbides, which are good electrocatalysts for the HER, have also been reported as bifunctional electrocatalysts for overall water splitting in the OER field. ,,, …”

Section: Transition Metal Carbidesmentioning

confidence: 99%

“…had already started in the late 1960s. 288,289 Among the carbide materials reported up to now, Ni-, Co-, and Fe-based carbides are good candidates for OER electrocatalysts due to the superb activity of Ni, Co, and Fe metals for alkaline OER electrocatalysis. 91,216,227,238,258,260,264,270,277,283 Additionally, W-and Mo-based carbides, which are good electrocatalysts for the HER, have also been reported as bifunctional electrocatalysts for overall water splitting in the OER field.…”

Section: Transition Metal Carbidesmentioning

confidence: 99%

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A Review of Transition Metal Boride, Carbide, Pnictide, and Chalcogenide Water Oxidation Electrocatalysts

Kawashima,

Márquez,

Smith

et al. 2023

Chem. Rev.

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Transition metal borides, carbides, pnictides, and chalcogenides (X-ides) have emerged as a class of materials for the oxygen evolution reaction (OER). Because of their high earth abundance, electrical conductivity, and OER performance, these electrocatalysts have the potential to enable the practical application of green energy conversion and storage. Under OER potentials, X-ide electrocatalysts demonstrate various degrees of oxidation resistance due to their differences in chemical composition, crystal structure, and morphology. Depending on their resistance to oxidation, these catalysts will fall into one of three post-OER electrocatalyst categories: fully oxidized oxide/(oxy)hydroxide material, partially oxidized core@shell structure, and unoxidized material. In the past ten years (from 2013 to 2022), over 890 peer-reviewed research papers have focused on X-ide OER electrocatalysts. Previous review papers have provided limited conclusions and have omitted the significance of “catalytically active sites/species/phases” in X-ide OER electrocatalysts. In this review, a comprehensive summary of (i) experimental parameters (e.g., substrates, electrocatalyst loading amounts, geometric overpotentials, Tafel slopes, etc.) and (ii) electrochemical stability tests and post-analyses in X-ide OER electrocatalyst publications from 2013 to 2022 is provided. Both mono and polyanion X-ides are discussed and classified with respect to their material transformation during the OER. Special analytical techniques employed to study X-ide reconstruction are also evaluated. Additionally, future challenges and questions yet to be answered are provided in each section. This review aims to provide researchers with a toolkit to approach X-ide OER electrocatalyst research and to showcase necessary avenues for future investigation.

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