Enhanced Fe 3d delocalization and moderate spin polarization in Fe Ni atomic pairs for bifunctional ORR and OER electrocatalysis

Li, Hongguan; Wang, Jing; Qi, Ruijuan; Hu, Yongfeng; Zhang, Jing; Zhao, Hongbin; Zhang, Jiujun; Zhao, Yufeng

doi:10.1016/j.apcatb.2020.119778

Cited by 158 publications

(96 citation statements)

References 29 publications

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“…Some other researchers [144] have also discussed the impact on OER performance when Fe was doped on a nickel oxide substrate. They observed the best OER performance with an optimum composition of Fe:Ni that is 2:3 [145,146].…”

Section: Earth-abundant Oer Electrocatalystsmentioning

confidence: 99%

Earth-Abundant Electrocatalysts for Water Splitting: Current and Future Directions

Shamsah¹,

Sami²

2021

Catalysts

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Of all the available resources given to mankind, the sunlight is perhaps the most abundant renewable energy resource, providing more than enough energy on earth to satisfy all the needs of humanity for several hundred years. Therefore, it is transient and sporadic that poses issues with how the energy can be harvested and processed when the sun does not shine. Scientists assume that electro/photoelectrochemical devices used for water splitting into hydrogen and oxygen may have one solution to solve this hindrance. Water electrolysis-generated hydrogen is an optimal energy carrier to store these forms of energy on scalable levels because the energy density is high, and no air pollution or toxic gas is released into the environment after combustion. However, in order to adopt these devices for readily use, they have to be low-cost for manufacturing and operation. It is thus crucial to develop electrocatalysts for water splitting based on low-cost and land-rich elements. In this review, I will summarize current advances in the synthesis of low-cost earth-abundant electrocatalysts for overall water splitting, with a particular focus on how to be linked with photoelectrocatalytic water splitting devices. The major obstacles that persist in designing these devices. The potential future developments in the production of efficient electrocatalysts for water electrolysis are also described.

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Section: Earth-abundant Oer Electrocatalystsmentioning

confidence: 99%

Earth-Abundant Electrocatalysts for Water Splitting: Current and Future Directions

Shamsah¹,

Sami²

2021

Catalysts

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“…5c). 150,151 The M and M' can largely alter each other's electronic structure through metal-metal interactions and charge polarization, 152,153 also change the spin state of the neighboring Fe-N 4 site from the low spin state (t 2g 5 e g 0 ) to intermediate spin state (t 2g 4 e g 1 ) (Fig. 5f).…”

Section: Dual Metal Sitesmentioning

confidence: 99%

Active site engineering of single-atom carbonaceous electrocatalysts for the oxygen reduction reaction

2021

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“…With the unique frame pore structure and the synergistic effect of WS 2 , Co 9 S 8 , and W-N multifunctional groups, W-N/C@ Co 9 S 8 @WS 2 exhibited E 1/2 = 0.84 V and a slight Tafel slope of 41 mV dec −1 (Figure 6d 2 ) when employed as electrocatalysts for OER and a potential of 1.79 V to achieve the current density of 10 mA cm −2 in 0.1 m KOH. Li et al [148] demonstrated that the FeNi dual-site architecture can serve as a superior bifunctional catalyst for both ORR and OER by coupling with Ni, Fe 3D electron delocalization (Figure 6e 1 ). The as-constructed catalyst exhibits outstanding ORR efficiency with a comparable onset potential of 1.005 V and half-wave potential of 0.861 V. The best ORR kinetic activity was reflected in an 80 mV dec −1 Tafel slope (Figure 6e 2 ) of Fe/Ni-N-C.…”

Section: Metal-air Batterymentioning

confidence: 99%

Rechargeable Batteries: Regulating Electronic and Ionic Transports for High Electrochemical Performance

Zhao

Hui

et al. 2021

Adv Materials Technologies

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Rechargeable batteries are serving society and are continuing to develop according to application requirements. Recently, rechargeable batteries with high energy density, power density, stability, and rate performance, as well as low cost have attracted the attention of researchers globally. However, achieving all these merits in a single rechargeable battery system is difficult. Accordingly, many approaches are reported to improve the performance of different energy storage devices. Nevertheless, reports on a general research method to improve the performance of battery systems are still limited. Herein, the current progress of rechargeable batteries and the corresponding opportunities and challenges are summarized. The principles of electrochemical reactions for lead–acid batteries, metal–ion batteries, metal–sulfur batteries, and metal–air batteries are introduced and compared. The technological challenges in the development of rechargeable batteries on the basis of transports of electrons and ions are comprehensively analyzed. In particular, approaches for regulating electronic and ionic transports are comprehensively discussed for the enhancement of electrochemical performance. Some advanced energy storage materials with good electronic and ionic conductivities are also highlighted. Furthermore, several perspectives on potential research directions for the choice and design of high‐performance rechargeable batteries for practical application are proposed.

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Enhanced Fe 3d delocalization and moderate spin polarization in Fe Ni atomic pairs for bifunctional ORR and OER electrocatalysis

Cited by 158 publications

References 29 publications

Earth-Abundant Electrocatalysts for Water Splitting: Current and Future Directions

Earth-Abundant Electrocatalysts for Water Splitting: Current and Future Directions

Active site engineering of single-atom carbonaceous electrocatalysts for the oxygen reduction reaction

Rechargeable Batteries: Regulating Electronic and Ionic Transports for High Electrochemical Performance

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