Low-Electronegativity Vanadium Substitution in Cobalt Carbide Induced Enhanced Electron Transfer for Efficient Overall Water Splitting

Zhang, Songge; Gao, Guohua; Hao, Jiace; Wang, Manman; Zhu, Han; Lu, Shuanglong; Duan, Fang; Dong, Weifu; Zhao, Yunlong

doi:10.1021/acsami.9b16390

Cited by 52 publications

(37 citation statements)

References 52 publications

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“…Meanwhile, Zhang et al [ 149 ] fabricated self‐supported and quantitatively substituted V 0.28 Co 2.72 C/CNFs with larger amounts via direct electrospinning. The electron transfer from V to Co made Co a local negative charge center and led to a significant increase in efficiency for overall water splitting.…”

Section: Electrospun Nanocatalysts For Electrochemical Water Splittingmentioning

confidence: 99%

Recent Advances in 1D Electrospun Nanocatalysts for Electrochemical Water Splitting

et al. 2020

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Electrochemical water splitting, as a promising sustainable‐energy technology, has been limited by its slow kinetics and large overpotential. This shortcoming necessitates the design of 1D nanocatalysts with large surface area, high electronic conductivity, and easily tunable composition. Herein, recent progress about electrocatalytic water splitting based on the advanced electrospun nanomaterials is reviewed. First, the related fundamentals of electrochemical water splitting according to two main aspects are discussed as follows: hydrogen evolution reaction and oxygen evolution reaction. Second, the structure design and the electrocatalytic properties of electrospun nanomaterials according to difference in component (including single metal‐based electrocatalysts, metal alloy‐based electrocatalysts, metal oxide‐based electrocatalysts, metal sulfide‐based electrocatalysts, metal phosphide‐based electrocatalysts, metal carbide‐based electrocatalysts, etc.) are summarized. Finally, the future perspectives and challenges for designing next‐generation 1D electrospun nanocatalysts for electrochemical water splitting are concluded.

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Section: Electrospun Nanocatalysts For Electrochemical Water Splittingmentioning

confidence: 99%

Recent Advances in 1D Electrospun Nanocatalysts for Electrochemical Water Splitting

et al. 2020

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“…By using such electrocatalysts as both cathode and anode, low‐cost water splitting electrolyzer can be realized, which avoids the usage of different equipment and processes for the different types of HER and OER electrocatalysts. Similarly, to enhance the overall water splitting performance, the electronic modulation and interface engineering of the electrocatalysts are also desirable 199‐213 …”

Section: Electrocatalytic Water Splitting Based On the Electrospun Namentioning

confidence: 99%

“…By the substitution of the cobalt with low‐electronegativity vanadium, the electronic structure of the Co 3 C could be tuned, exhibiting a lattice distortion (Figure 9A,B). 205 DFT calculations revealed that the V substitution made Co 3 C as the rich electronic center, which could weaken OH bonds and reduce the barrier for the OER process (Figure 9C,D). As a result, the prepared V 0.28 Co 2.72 C with 9 at.% V substitution showed both excellent HER and OER efficiency, delivering overpotentials of 87 and 210 mV to reach a current density of 10 mA cm −2 in an alkaline electrolyte, respectively.…”

Section: Electrocatalytic Water Splitting Based On the Electrospun Namentioning

confidence: 99%

“…(L) Stability test of the fabricated electrolyzer. Reproduced with permission: Copyright 2019, American Chemical Society 205 . CNF, carbon nanofiber; HER, hydrogen evolution reaction; LSV, linear sweep voltammetry; OER, oxygen evolution reaction…”

Section: Electrocatalytic Water Splitting Based On the Electrospun Namentioning

confidence: 99%

“…Similarly, to enhance the overall water splitting performance, the electronic modulation and interface engineering of the electrocatalysts are also desirable. [199][200][201][202][203][204][205][206][207][208][209][210][211][212][213]…”

Section: Overall Water Splittingmentioning

confidence: 99%

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Electronic modulation and interface engineering of electrospun nanomaterials‐based electrocatalysts toward water splitting

et al. 2020

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Nowdays, electrocatalytic water splitting has been regarded as one of the most efficient means to approach the urgent energy crisis and environmental issues. However, to speed up the electrocatalytic conversion efficiency of their half reactions including hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), electrocatalysts are usually essential to reduce their kinetic energy barriers. Electrospun nanomaterials possess a unique one‐dimensional structure for outstanding electron and mass transportation, large specific surface area, and the possibilities of flexibility with the porous feature, which are good candidates as efficient electrocatalysts for water splitting. In this review, we focus on the recent research progress on the electrospun nanomaterials‐based electrocatalysts for HER, OER, and overall water splitting reaction. Specifically, the insights of the influence of the electronic modulation and interface engineering of these electrocatalysts on their electrocatalytic activities will be deeply discussed and highlighted. Furthermore, the challenges and development opportunities of the electrospun nanomaterials‐based electrocatalysts for water splitting are featured. Based on the achievements of the significantly enhanced performance from the electronic modulation and interface engineering of these electrocatalysts, full utilization of these materials for practical energy conversion is anticipated.

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Transition Metal Carbides Electrocatalysts for Water Splitting

Leonard

2021

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Electrochemically splitting water into its two elemental components, hydrogen and oxygen, is being heavily investigated as a path toward renewable energy. Hydrogen has been viewed as an energy carrier which could store wind, solar, and other forms of renewable energy for later use. In order to develop the hydrogen economy, new stable, and economical water splitting catalysts need to be developed. Transition metal carbides (TMC) are robust materials consisting of only metal and carbon atoms. These compounds are electrically conducting, and resistant to degradation in conditions typical of electrochemical water splitting reactions. TMCs have been found to have an electronic structure that is similar to Pt and are being investigated as cost‐effective, stable materials for both hydrogen and oxygen reactions. These TMC catalysts have been modified using several approaches including forming nanoparticles to increase surface area, adding conducting carbon and doped carbon support materials, doping the metal carbide to alter the electronic structure, and creating heterointerfaces with other metals and compounds. Fundamental studies on the nitrogen (N‐doped) carbon composites have shown a significant synergistic effect by modifying the electronic structure and thus the hydrogen binding energy. The nitrogen sites also provide a unique and beneficial binding site for H atoms during the electrochemical process. The most challenging but promising area of study focuses on the combination of TMC compounds with another catalyst material to create optimized interfaces. These heterointerface materials are difficult to probe experimentally and further optimize but with advances in density‐functional theory (DFT) calculations, several predictive models have been established. Through these modifications, several catalyst systems have shown catalytic activity and stability that rivals precious metal catalysts at greatly reduced cost. In addition, some of the synthetic methods could be easily scaled for industrial applications. The future of TMC catalysts is extremely promising and with improvements in scalable synthesis methods, activity, and stability, these carbide catalysts will likely be utilized in commercial electrolysis applications.

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Low-Electronegativity Vanadium Substitution in Cobalt Carbide Induced Enhanced Electron Transfer for Efficient Overall Water Splitting

Cited by 52 publications

References 52 publications

Recent Advances in 1D Electrospun Nanocatalysts for Electrochemical Water Splitting

Recent Advances in 1D Electrospun Nanocatalysts for Electrochemical Water Splitting

Electronic modulation and interface engineering of electrospun nanomaterials‐based electrocatalysts toward water splitting

Transition Metal Carbides Electrocatalysts for Water Splitting

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