Trimetallic Oxyhydroxide Coralloids for Efficient Oxygen Evolution Electrocatalysis

Pi, Yecan; Shao, Qi; Wang, Pengtang; Lv, Fan; Guo, Shaojun; Guo, Jun; Huang, Xiaoqing

doi:10.1002/anie.201701533

Cited by 237 publications

(136 citation statements)

References 65 publications

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“…Electrochemical impedance spectroscopy was further used to characterize the OER kinetics. [22] The reduced semicircular diameter in Nyquist plots compared to the ternary ones and commercial Ir/C catalysts ( Figure S7, Supporting Information) reveals charge-transfer resistance reduction when both Co and Fe are incorporated into the nanoparticles. [20,23] We investigated the electrochemical double-layer capacitance, which is proportional to the electrochemically active surface area (ECSA).…”

Section: Resultsmentioning

confidence: 99%

An Efficient and Earth‐Abundant Oxygen‐Evolving Electrocatalyst Based on Amorphous Metal Borides

Nsanzimana

Peng

et al. 2017

Advanced Energy Materials

327

209

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to the efficiency loss of the overall electrochemical process. [2] Therefore, efficient OER electrocatalyst is a cornerstone for the sustainable energy storage and conversion technologies. [3] Noble-metal-based catalysts such as Ru and Ir oxides have been reported to be excellent OER catalysts; [4] however, their low natural abundance and higher cost render their widespread commercial utilization impractical.[5] Thus, developing efficient, durable, and cost-effective catalytic materials for OER is crucial, but so far still remains a great challenge.Recently, various metal-metalloid compound materials such as chalcogenides, nitrides, and phosphides have been reported to exhibit promising OER electrocatalytic activities. [6] This has been attributed to the charge transfer between different elements and the modified electronic structures, and consequently lowers the kinetic energy barriers of the electrochemical processes. [7] In this regard, to extend such applications on metal borides is reasonable, wherein metal borides share certain properties with other metal-metalloids, such as bonding schema in metal phosphides. [8] Recently, the application of monometallic borides such as cobalt boride, iron boride, and nickel boride as well as cobalt-borate-based graphene hybrid as oxygen-evolving catalyst has been reported to exhibit promising electrocatalytic activity for OER in alkaline media. [9] However, multimetal-metalloid boron-based material, herein referred to as an amorphous quaternary metal boride, for simplicity, as oxygen-evolving electrocatalyst, reported to date is very limited. Thus, it is still of great interest to develop metal-boride-based OER catalysts and further to explore their catalytic activities. The as-identified approach to enhance electrochemical OER properties in metalmetalloid material opens a new avenue in related applications for energy devices that involve OER such as water electrolysis and metal-air batteries.Despite the complicated structure of amorphous material, well-characterized amorphous nanomaterial as oxygen-evolving material has received attention due to the unique properties such as higher catalytic selectivity and activity. [10] A great number of under-coordinated metal atoms, and hence abundant defects, in amorphous nanomaterial may provide more reactive sites at the catalyst surface, and as a result, facilitating the binding of hydroxyls and thus enhancing OER performance. [11] Furthermore, these amorphous nanomaterials have attracted much attention in other electrochemical applications Cost-effective and efficient oxygen-evolving electrocatalysts are urgently required for energy storage and conversion technologies. In this work, an amorphous trimetallic boride nanocatalyst (Fe-Co-2.3Ni-B) prepared by a simple approach is reported as a highly efficient oxygen evolution reaction electrocatalyst. It exhibits an overpotential (η) of 274 mV to deliver a geometric current density (j geo ) of 10 mA cm −2 , a small Tafel slope of 38 mV dec −1 , and excellent long-term durabil...

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Section: Resultsmentioning

confidence: 99%

An Efficient and Earth‐Abundant Oxygen‐Evolving Electrocatalyst Based on Amorphous Metal Borides

Nsanzimana

Peng

et al. 2017

Advanced Energy Materials

327

209

View full text Add to dashboard Cite

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“…In general, elemental doping can increase site activities through the formation of defect sites, the enhancement of electronic conductivities, and the modification of intrinsic electronic structures of catalysts, resulting in lowered energy barriers …”

Section: Approaches To Enhancing the Activitymentioning

confidence: 99%

A review of transition metal‐based bifunctional oxygen electrocatalysts

Ibrahim

Tsai

Chala

et al. 2019

J Chinese Chemical Soc

106

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Electrochemical energy storage and conversion devices play a key role in the development of clean, sustainable, and efficient energy systems to meet the sustainable growth of our society. However, challenging issues including the sluggish kinetics of oxygen electrode reactions involving the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) are present, limiting the implementation of devices such as metal‐air batteries, water electrolyzers, and regenerative fuel cells. In this review, various monometallic and bimetallic transition metal oxides (TMOs) and hydroxides are summarized in terms of their application for ORR/OER, in which the merits and demerits of various precious metal and carbon‐based metal oxide materials are discussed, with requirements for better electrocatalysts and catalyst support being introduced as well. Following this, different approaches to improve catalytic activity such as the introduction of doping and defects, the manipulation of crystal facets, and the engineering of supports, compositions, and morphologies are summarized in which TMOs with improved ORR/OER catalytic activities can be synthesized, further improving the speed, stability, and polarization of electrochemical energy storage and conversion devices. Finally, perspectives into the improvement of performance and the better understanding of ORR/OER mechanisms for bifunctional electrocatalysts using in situ spectroscopic techniques and density functional theory calculations are also discussed.

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“…[20] Generally,r educing the size of catalysts to offer more active sites, and compositing with 3D carbonous or metallic frameworks to enhance the electronic conductivity and mass diffusion simultaneously are efficient methods to improve the electrochemical activity of catalysts. [25,26] Thei ncorporation of heteroatoms [27,28] is also capable of creating more active sites and/or adjusting their electron configuration to obtain preferable OER catalytic performance.B esides,P etrie et al [29] found that strain-induced e g orbital splitting and polarization enhance the activity of LaNiO 3 for promoting active centers at asymmetric surfaces. [25,26] Thei ncorporation of heteroatoms [27,28] is also capable of creating more active sites and/or adjusting their electron configuration to obtain preferable OER catalytic performance.B esides,P etrie et al [29] found that strain-induced e g orbital splitting and polarization enhance the activity of LaNiO 3 for promoting active centers at asymmetric surfaces.…”

Section: Introductionmentioning

confidence: 99%

Utilizing the Space‐Charge Region of the FeNi‐LDH/CoP p‐n Junction to Promote Performance in Oxygen Evolution Electrocatalysis

Tsega

Liu

et al. 2019

Angewandte Chemie

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The modulation of electron density is an effective option for efficient alternative electrocatalysts.Here,p-n junctions are constructed in 3D free-standing FeNi-LDH/CoP/ carbon cloth (CC) electrode (LDH = layered double hydroxide). The positively charged FeNi-LDH in the space-charge region can significantly boost oxygen evolution reaction. Therefore,t he ja t1 .485 V( vs.R HE) of FeNi-LDH/CoP/CC achieves ca. 10-fold and ca. 100-fold increases compared to those of FeNi-LDH/CC and CoP/CC,r espectively.D ensity functional theory calculation reveals OH À has astronger trend to adsorb on the surface of FeNi-LDH side in the p-n junction compared to individual FeNi-LDH further verifying the synergistic effect in the p-n junction. Additionally,itrepresents excellent activity towardw ater splitting.T he utilization of heterojunctions would open up an entirely new possibility to purposefully regulate the electronic structure of active sites and promote their catalytic activities.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Trimetallic Oxyhydroxide Coralloids for Efficient Oxygen Evolution Electrocatalysis

Cited by 237 publications

References 65 publications

An Efficient and Earth‐Abundant Oxygen‐Evolving Electrocatalyst Based on Amorphous Metal Borides

An Efficient and Earth‐Abundant Oxygen‐Evolving Electrocatalyst Based on Amorphous Metal Borides

A review of transition metal‐based bifunctional oxygen electrocatalysts

Utilizing the Space‐Charge Region of the FeNi‐LDH/CoP p‐n Junction to Promote Performance in Oxygen Evolution Electrocatalysis

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