Highly Crystallized Cubic Cattierite CoS 2 for Electrochemically Hydrogen Evolution over Wide pH Range from 0 to 14

Zhang, Haichuan; Li, Yingjie; Zhang, Guoxin; Wan, Pengbo; Xu, Tianhao; Wu, Xiaochao; Sun, Xiaoming

doi:10.1016/j.electacta.2014.09.164

Cited by 79 publications

(43 citation statements)

References 32 publications

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“…S5(f) in the ESM) are larger than that of ~4.02 mF/cm 2 for NiCoP nanosheets (Fig. S5(b) in the ESM) [31][32][33]. The NiCo-based oxide (Ni-Co-O), obtained by annealing the Ni-Co precursor in absence of a P source, displays low HER activity, with a large onset overpotential of ~130 mV vs. RHE (Fig.…”

Section: Resultsmentioning

confidence: 92%

Ternary NiCoP nanosheet arrays: An excellent bifunctional catalyst for alkaline overall water splitting

et al. 2016

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Exploring bifunctional catalysts for the hydrogen and oxygen evolution reactions (HER and OER) with high efficiency, low cost, and easy integration is extremely crucial for future renewable energy systems. Herein, ternary NiCoP nanosheet arrays (NSAs) were fabricated on 3D Ni foam by a facile hydrothermal method followed by phosphorization. These arrays serve as bifunctional alkaline catalysts, exhibiting excellent electrocatalytic performance and good working stability for both the HER and OER. The overpotentials of the NiCoP NSA electrode required to drive a current density of 50 mA/cm 2 for the HER and OER are as low as 133 and 308 mV, respectively, which is ascribed to excellent intrinsic electrocatalytic activity, fast electron transport, and a unique superaerophobic structure. When NiCoP was integrated as both anodic and cathodic material, the electrolyzer required a potential as low as ~1.77 V to drive a current density of 50 mA/cm 2 for overall water splitting, which is much smaller than a reported electrolyzer using the same kind of phosphide-based material and is even better than the combination of Pt/C and Ir/C, the best known noble metal-based electrodes. Combining satisfactory working stability and high activity, this NiCoP electrode paves the way for exploring overall water splitting catalysts.

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Section: Resultsmentioning

confidence: 92%

Ternary NiCoP nanosheet arrays: An excellent bifunctional catalyst for alkaline overall water splitting

et al. 2016

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“…To overcome the pH issue, Zhang et al. designed pH‐universal HER catalyst (Figure A–B), where highly‐crystallized CoS 2 pyramids with cubic cattierite‐type phase were obtained over Ti foil using hydrothermal method . The high activity of CoS x building blocks coupled with the stability of MoS x units produced an efficient catalyst with high HER activity.…”

Section: Electro‐catalysts For the Hydrogen Evolution Reaction (Her)mentioning

confidence: 99%

Recent Advances in Non‐Precious Metal‐Based Electrodes for Alkaline Water Electrolysis

Zhou

et al. 2020

ChemNanoMat

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Hydrogen gas has been regarded as an ideal energy source that could replace the need of fossil fuels, based on its high energy density with zero carbon emissions. The production of hydrogen via electrolysis of water is not a new field, but the technology has seen significant advancements in recent times, owing to the proportional growing demand of clean and affordable energy. This review discusses the most recent progresses achieved in the area of earth abundant catalysis, particularly, non‐precious metal (Ni, Co, Fe, Mo, W)‐based catalysts that are being utilized for the electrochemical hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solutions. Based on the type of materials, the discussions are categorized into sections attributed to transition metal alloys, hydroxides, oxides, chalcogenides, carbides and nitrogenous materials. In general, a brief introduction of HER and OER mechanisms followed by a detailed discussion of the presently considered catalysts with endeavors have been made to highlight the new technologies and alternative approaches that are being considered promising towards production of clean H2 energy. Finally, a prospective has been provided to accentuate the future of non‐noble metal based catalyst in electro‐catalytic water splitting reactions.

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“…[2,3] Although noble metalbased materials such as Pt and RuO 2 / IrO 2 are, at present, the most widely used electrocatalysts for HER and OER, the high cost and scarcity of such precious materials seriously limit their large-scale applications. [23][24][25][26] In addition, according to recent reports, these compounds can operate as highly efficient OER electrocatalysts and could thus be utilized as bifunctional electrocatalysts. However, the use of different type of electrocatalysts in an integrated electrolyzer is unacceptable, as it causes a mismatch in catalytic activity and stability in wide pH ranges.…”

Section: Introductionmentioning

confidence: 99%

3D Architectures of Quaternary Co‐Ni‐S‐P/Graphene Hybrids as Highly Active and Stable Bifunctional Electrocatalysts for Overall Water Splitting

Song

Yoon

et al. 2018

Advanced Energy Materials

110

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Developing low-cost, highly active, and stable bifunctional electrocatalysts is a challenging issue in electrochemical water electrolysis. Building on 3D architectured electrocatalysts through structural and compositional engineering is an effective strategy to enhance catalytic activities as well as stability and durability. Herein, 3D architectures of quaternary Co-Ni-S-P compounds coupled with graphene ((Co 1−x Ni x )(S 1−y P y ) 2 /G) electrocatalysts are proposed, in which nanosheets are self-assembled to form 3D architectures with round and flat doughnut-like shapes, toward overall water splitting. Benefiting from the 3D architectures and Ni, P substitution, (Co 1−x Ni x )(S 1−y P y ) 2 /G exhibits superior electrocatalytic activities with low overpotentials of 117 and 285 mV at 10 mA cm −2 and Tafel slopes of 85 and 105 mV dec −1 for hydrogen and oxygen evolution reactions, respectively, in alkaline media. In addition, minimal increases in overpotential are observed, even after the 10 000th voltammetric cycle and continuous chronopotentiometric testing over 50-100 h, confirming the high stability and durability of (Co 1−x Ni x )(S 1−y P y ) 2 /G. When used as both cathode and anode, (Co 1−x Ni x )(S 1−y P y ) 2 /G achieves excellent overall water splitting performance with a cell potential as low as 1.65 V, reaching a current density of 10 mA cm −2 with no obvious decay after 50 h, demonstrating that (Co 1−x Ni x )(S 1−y P y ) 2 /G is an efficient bifunctional electrocatalyst for overall water splitting.

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Highly Crystallized Cubic Cattierite CoS 2 for Electrochemically Hydrogen Evolution over Wide pH Range from 0 to 14

Cited by 79 publications

References 32 publications

Ternary NiCoP nanosheet arrays: An excellent bifunctional catalyst for alkaline overall water splitting

Ternary NiCoP nanosheet arrays: An excellent bifunctional catalyst for alkaline overall water splitting

Recent Advances in Non‐Precious Metal‐Based Electrodes for Alkaline Water Electrolysis

3D Architectures of Quaternary Co‐Ni‐S‐P/Graphene Hybrids as Highly Active and Stable Bifunctional Electrocatalysts for Overall Water Splitting

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