The formation of (NiFe)S<sub>2</sub> pyrite mesocrystals as efficient pre-catalysts for water oxidation

Ni, Bing; He, Ting; Wang, Jiaou; Zhang, Simin; Chen, Ouyang; Long, Yong; Zhuang, Jing; Wang, Xun

doi:10.1039/c7sc05452a

Cited by 61 publications

(50 citation statements)

References 39 publications

(47 reference statements)

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“…The catalyst was not only superior to commercial RuO 2 , but surpassed the performance of many transition metal catalysts for OER. Similarly, Wang and coworkers synthesized single‐crystalline porous cubic (NiFe)Se 2 pyrite mesocrystals as an OER electrocatalyst . The as‐synthesized crystals were self‐optimized into OER active amorphous S‐doped metal oxyhydroxides, which attained oxygen production at η 10 = 260 mV.…”

Section: Electrocatalysts For Oermentioning

confidence: 99%

Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

Sultan

Tiwari

Singh

et al. 2019

Advanced Energy Materials

636

326

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The sustainable and scalable production of hydrogen through hydrogen evolution reaction (HER) and oxygen through oxygen evolution reaction (OER) in water splitting demands efficient and robust electrocatalysts. Currently, state‐of‐the‐art electrocatalysts of Pt and IrO2/RuO2 exhibit the benchmark catalytic activity toward HER and OER, respectively. However, expanding their practical application is hindered by their exorbitant price and scarcity. Therefore, the development of alternative effective electrocatalysts for water splitting is crucial. In the last few decades, substantial effort has been devoted to the development of alternative HER/OER and water splitting catalysts based on various transition metals (including Fe, Co, Ni, Mo, and atomic Pt) which show promising catalytic activities and durability. In this review, after a brief introduction and basic mechanism of HER/OER, the authors systematically discuss the recent progress in design, synthesis, and application of single atom and cluster‐based HER/OER and water splitting catalysts. Moreover, the crucial factors that can tune the activity of catalysts toward HER/OER and water splitting such as morphology, crystal defects, hybridization of metals with nonmetals, heteroatom doping, alloying, and formation of metals inside graphitic layered materials are discussed. Finally, the existing challenges and future perspectives for improving the performance of electrocatalysts for water splitting are addressed.

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Section: Electrocatalysts For Oermentioning

confidence: 99%

Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

Sultan

Tiwari

Singh

et al. 2019

Advanced Energy Materials

636

326

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show abstract

“…Up to date, tremendous achievements have been acquired in the development of earth‐abundant element‐based electrocatalysts, including transition‐metal oxides/hydroxides,6 chalcogenides,7 phosphides,8 nitrides,9 and carbides 10. Among them, metal phosphides have been extensively investigated as high‐performance electrocatalysts for HER, showing low overpotential and small tafel slope in the acidic media 11.…”

Section: Introductionmentioning

confidence: 99%

Fe‐CoP Electrocatalyst Derived from a Bimetallic Prussian Blue Analogue for Large‐Current‐Density Oxygen Evolution and Overall Water Splitting

et al. 2018

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Industrial application of overall water splitting requires developing readily available, highly efficient, and stable oxygen evolution electrocatalysts that can efficiently drive large current density. This study reports a facile and practical method to fabricate a non‐noble metal catalyst by directly growing a Co‐Fe Prussian blue analogue on a 3D porous conductive substrate, which is further phosphorized into a bifunctional Fe‐doped CoP (Fe‐CoP) electrocatalyst. The Fe‐CoP/NF (nickel foam) catalyst shows efficient electrocatalytic activity for oxygen evolution reaction, requiring low overpotentials of 190, 295, and 428 mV to achieve 10, 500, and 1000 mA cm−2 current densities in 1.0 m KOH solution. In addition, the Fe‐CoP/NF can also function as a highly active electrocatalyst for hydrogen evolution reaction with a low overpotential of 78 mV at 10 mA cm−2 current density in alkaline solution. Thus, the Fe‐CoP/NF electrode with meso/macropores can act as both an anode and a cathode to fabricate an electrolyzer for overall water splitting, only requiring a cell voltage of 1.49 V to afford a 10 mA cm−2 current density with remarkable stability. This performance appears to be among the best reported values and is much better than that of the IrO2‐Pt/C‐based electrolyzer.

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“…From the perspective of compositional design, a large quantity of transition‐metal‐based novel catalysts, especially Fe, Co, Ni‐contained oxides, hydroxides, chalcogenides, and phosphides have been extensively studied since their low costs and high catalytic performances meet the requirements of high‐efficiency electrocatalysts . Among them, Fe, Co, Ni‐based sulfides have been proved high OER and ORR catalytic activity due to their rich catalytic active sites, good stability, and high electrical conductivity . However, considering their broad applications in hydrogen evolution reaction, researches on sulfide‐based OER/ORR catalysts are still insufficient.…”

Section: Introductionmentioning

confidence: 99%

Trimetallic Sulfide Mesoporous Nanospheres as Superior Electrocatalysts for Rechargeable Zn–Air Batteries

Yang

Wang

et al. 2018

Advanced Energy Materials

Self Cite

119

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Highly active and durable electrocatalysts are of great significance to accelerate the sluggish oxygen evolution and oxygen reduction reaction (OER and ORR) which are indispensable processes in practical devices such as metal–air batteries. Herein, the authors integrate morphological design with compositional manipulation, and successfully achieve well‐defined CoNiFe sulfide mesoporous nanospheres (CoNiFe‐S MNs). The as‐prepared CoNiFe‐S MNs exhibit superior OER and ORR catalytic activity, delivering a low overpotential of only 199 mV at a current density of 10 mA cm−2 in 1 m KOH solution and a half‐wave potential of 0.78 V in 0.1 m KOH solution toward OER and ORR, respectively. The CoNiFe‐S MNs involved Zn–air battery exhibits remarkable charge–discharge performance (voltage gap of 0.76 V at 2 mA cm−2) and high power density (over 140 mW cm−3). Extended‐time durability tests validate the structural recoverability of the mesoporous morphology, and the remarkable performance can be attributed to the intrinsic synergistic effect of heterometallic ions. It is believed that the method could pave the way for the design of novel electrocatalysts for Zn–air batteries.

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The formation of (NiFe)S₂ pyrite mesocrystals as efficient pre-catalysts for water oxidation

Abstract: We have fabricated (NiFe)S2 pyrite mesocrystals in the form of nearly-single crystalline porous cubes that self-optimize for efficient catalysis of water oxidation under electrochemical conditions.

Cited by 61 publications

References 39 publications

Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

Fe‐CoP Electrocatalyst Derived from a Bimetallic Prussian Blue Analogue for Large‐Current‐Density Oxygen Evolution and Overall Water Splitting

Trimetallic Sulfide Mesoporous Nanospheres as Superior Electrocatalysts for Rechargeable Zn–Air Batteries

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The formation of (NiFe)S2 pyrite mesocrystals as efficient pre-catalysts for water oxidation

Abstract: We have fabricated (NiFe)S2 pyrite mesocrystals in the form of nearly-single crystalline porous cubes that self-optimize for efficient catalysis of water oxidation under electrochemical conditions.

Cited by 61 publications

References 39 publications

Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

Fe‐CoP Electrocatalyst Derived from a Bimetallic Prussian Blue Analogue for Large‐Current‐Density Oxygen Evolution and Overall Water Splitting

Trimetallic Sulfide Mesoporous Nanospheres as Superior Electrocatalysts for Rechargeable Zn–Air Batteries

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The formation of (NiFe)S₂ pyrite mesocrystals as efficient pre-catalysts for water oxidation